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remove unused dependencies

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otsmr 2026-08-29 14:59:01 +02:00
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11
adaptive_number/LICENSE
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Copyright 2021 Philipp Sessler
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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adaptive_number/lib/adaptive_number.dart
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/// Support for doing something awesome.
///
/// More dartdocs go here.
library adaptive_number;
export 'src/number.dart';

120
adaptive_number/lib/src/int.dart
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import 'package:adaptive_number/src/number.dart';
class NumberInt implements Number {
final int _value;
NumberInt(this._value);
@override
NumberInt operator +(Number value) {
return NumberInt(_value + (value.val as int));
}
@override
NumberInt operator -(Number value) {
return NumberInt(_value - (value.val as int));
}
@override
NumberInt operator -() {
return NumberInt(-(val));
}
@override
NumberInt operator *(Number value) {
return NumberInt(_value * (value.val as int));
}
@override
NumberInt operator &(Number value) {
return NumberInt(_value & (value.val as int));
}
@override
NumberInt operator >>(int value) {
return NumberInt(_value >> value);
}
@override
NumberInt operator <<(int value) {
return NumberInt(_value << value);
}
@override
NumberInt operator ^(Number value) {
return NumberInt(_value ^ (value.val as int));
}
@override
NumberInt operator |(Number value) {
return NumberInt(_value | (value.val as int));
}
@override
bool operator <(Number value) {
return (intValue < value.intValue);
}
@override
bool operator <=(Number value) {
return (intValue <= value.intValue);
}
@override
bool operator >(Number value) {
return (intValue > value.intValue);
}
@override
bool operator >=(Number value) {
return (intValue >= value.intValue);
}
@override
NumberInt operator %(Number value) {
return NumberInt(_value % (value.val as int));
}
@override
Number operator ~/(Number value) {
return NumberInt(_value ~/ (value.val as int));
}
@override
int get val => _value;
@override
int get intValue => _value;
@override
bool operator ==(Object other) =>
identical(this, other) ||
other is NumberInt &&
runtimeType == other.runtimeType &&
_value == other._value;
@override
int get hashCode => _value.hashCode;
@override
String toString() {
return _value.toString();
}
@override
String toRadixString(int radix) {
return _value.toRadixString(radix);
}
@override
NumberInt abs() {
return NumberInt(_value.abs());
}
@override
int compareTo(Number other) {
return _value.compareTo(other.intValue);
}
}
Number createNumber(int val) => NumberInt(val);

121
adaptive_number/lib/src/int64.dart
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import 'package:adaptive_number/src/number.dart';
import 'package:fixnum/fixnum.dart';
class NumberInt64 implements Number {
final Int64 _value;
NumberInt64(this._value);
@override
NumberInt64 operator +(Number value) {
return NumberInt64(_value + (value.val as Int64));
}
@override
NumberInt64 operator -(Number value) {
return NumberInt64(_value - (value.val as Int64));
}
@override
NumberInt64 operator -() {
return NumberInt64(-(val));
}
@override
NumberInt64 operator *(Number value) {
return NumberInt64(_value * (value.val as Int64));
}
@override
NumberInt64 operator &(Number value) {
return NumberInt64(_value & (value.val as Int64));
}
@override
NumberInt64 operator >>(int value) {
return NumberInt64(_value >> value);
}
@override
NumberInt64 operator <<(int value) {
return NumberInt64(_value << value);
}
@override
NumberInt64 operator ^(Number value) {
return NumberInt64(_value ^ (value.val as Int64));
}
@override
NumberInt64 operator |(Number value) {
return NumberInt64(_value | (value.val as Int64));
}
@override
bool operator <(Number value) {
return (intValue < value.intValue);
}
@override
bool operator <=(Number value) {
return (intValue <= value.intValue);
}
@override
bool operator >(Number value) {
return (intValue > value.intValue);
}
@override
bool operator >=(Number value) {
return (intValue >= value.intValue);
}
@override
NumberInt64 operator %(Number value) {
return NumberInt64(_value % (value.val as Int64));
}
@override
Number operator ~/(Number value) {
return NumberInt64(_value ~/ (value.val as Int64));
}
@override
Int64 get val => _value;
@override
int get intValue => _value.toInt();
@override
bool operator ==(Object other) =>
identical(this, other) ||
other is NumberInt64 &&
runtimeType == other.runtimeType &&
_value == other._value;
@override
int get hashCode => _value.hashCode;
@override
String toString() {
return _value.toString();
}
@override
String toRadixString(int radix) {
return _value.toRadixString(radix);
}
@override
NumberInt64 abs() {
return NumberInt64(_value.abs());
}
@override
int compareTo(Number value) {
return _value.compareTo(value.val as Int64);
}
}
Number createNumber(int val) => NumberInt64(Int64(val));

78
adaptive_number/lib/src/number.dart
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import 'package:adaptive_number/src/stub.dart'
// ignore: uri_does_not_exist
if (dart.library.io) 'package:adaptive_number/src/int.dart'
// ignore: uri_does_not_exist
if (dart.library.html) 'package:adaptive_number/src/int64.dart';
abstract class Number {
static Number zero = Number(0);
static Number one = Number(1);
static Number two = Number(2);
factory Number(int val) => createNumber(val);
dynamic get val;
/// Returns the value as int (caution: May overflow on JS runtimes)
int get intValue;
@override
int get hashCode;
/// Addition operator.
Number operator +(Number value);
/// Subtraction operator.
Number operator -(Number value);
/// Negate operator.
Number operator -();
/// Multiplication operator.
Number operator *(Number value);
/// Bitwise and operator.
Number operator &(Number value);
/// Right bit-shift operator.
Number operator >>(int value);
/// Left bit-shift operator.
Number operator <<(int value);
/// Bitwise xor operator.
Number operator ^(Number value);
/// Bitwise or operator.
Number operator |(Number value);
/// Relational less than operator.
bool operator <(Number value);
/// Relational less than or equal to operator.
bool operator <=(Number value);
/// Relational greater than operator.
bool operator >(Number value);
/// Relational greater than or equal to operator.
bool operator >=(Number value);
/// Euclidean modulo operator.
Number operator %(Number value);
/// Truncating division operator.
Number operator ~/(Number value);
@override
String toString();
/// Returns a string representing the value of this integer in the given radix.
String toRadixString(int radix);
/// Returns the absolute value of this integer.
Number abs();
// Compares this to `other`
int compareTo(Number other);
}

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adaptive_number/lib/src/stub.dart
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import 'package:adaptive_number/src/number.dart';
Number createNumber(int val) => throw UnsupportedError(
'Cannot create a Number without package dart.library.io or dart.library.html being available');

17
adaptive_number/pubspec.yaml
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name: adaptive_number
version: 1.0.0
description: >-
Library providing an adaptive number implementation. On JS runtimes, a 64-bit signed fixed-width integer will be used and
for all other platforms the default Dart int data type.
homepage: https://github.com/lemoony/adaptive_number_dart
environment:
sdk: '>=2.12.0 <3.0.0'
dependencies:
fixnum: ^1.0.0
dev_dependencies:
pedantic: ^1.10.0
test: ^1.16.0

201
ed25519_edwards/LICENSE
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ed25519_edwards/lib/ed25519_edwards.dart
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/// Package ed25519 implements the Ed25519 signature algorithm. See
/// https://ed25519.cr.yp.to/.
///
/// These functions are also compatible with the “Ed25519” function defined in
/// RFC 8032. However, unlike RFC 8032's formulation, this package's private key
/// representation includes a public key suffix to make multiple signing
/// operations with the same key more efficient. This package refers to the RFC
/// 8032 private key as the “seed”.
library edwards25519;
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:collection/collection.dart';
import 'package:crypto/crypto.dart';
import 'package:ed25519_edwards/src/edwards25519.dart';
import 'package:ed25519_edwards/src/util.dart';
/// PublicKeySize is the size, in bytes, of public keys as used in this package.
const PublicKeySize = 32;
/// PrivateKeySize is the size, in bytes, of private keys as used in this package.
const PrivateKeySize = 64;
/// SignatureSize is the size, in bytes, of signatures generated and verified by this package.
const SignatureSize = 64;
/// SeedSize is the size, in bytes, of private key seeds. These are the private key representations used by RFC 8032.
const SeedSize = 32;
/// PublicKey is the type of Ed25519 public keys.
class PublicKey {
List<int> bytes;
PublicKey(this.bytes);
}
/// PrivateKey is the type of Ed25519 private keys.
class PrivateKey {
List<int> bytes;
PrivateKey(this.bytes);
}
/// KeyPair is the type of Ed25519 public/private key pair.
class KeyPair {
final PrivateKey privateKey;
final PublicKey publicKey;
KeyPair(this.privateKey, this.publicKey);
@override
int get hashCode => publicKey.hashCode;
@override
bool operator ==(other) =>
other is KeyPair &&
publicKey == other.publicKey &&
privateKey == other.privateKey;
}
/// public returns the PublicKey corresponding to PrivateKey.
PublicKey public(PrivateKey privateKey) {
var publicKey = privateKey.bytes.sublist(32, 32 + PublicKeySize);
return PublicKey(publicKey);
}
/// Seed returns the private key seed corresponding to priv. It is provided for
/// interoperability with RFC 8032. RFC 8032's private keys correspond to seeds
/// in this package.
Uint8List seed(PrivateKey privateKey) {
var seed = privateKey.bytes.sublist(0, SeedSize);
return seed as Uint8List;
}
/// GenerateKey generates a public/private key pair using entropy from secure random.
KeyPair generateKey() {
var seed = Uint8List(32);
fillBytesWithSecureRandomNumbers(seed);
var privateKey = newKeyFromSeed(seed);
var publicKey = privateKey.bytes.sublist(32, PrivateKeySize);
return KeyPair(privateKey, PublicKey(publicKey));
}
/// NewKeyFromSeed calculates a private key from a seed. It will throw
/// ArgumentError if seed.length is not SeedSize.
/// This function is provided for interoperability with RFC 8032.
/// RFC 8032's private keys correspond to seeds in this package.
PrivateKey newKeyFromSeed(Uint8List seed) {
if (seed.length != SeedSize) {
throw ArgumentError('ed25519: bad seed length ${seed.length}');
}
var h = sha512.convert(seed);
var digest = h.bytes.sublist(0, 32);
digest[0] &= 248;
digest[31] &= 127;
digest[31] |= 64;
var A = ExtendedGroupElement();
var hBytes = digest.sublist(0);
GeScalarMultBase(A, hBytes as Uint8List);
var publicKeyBytes = Uint8List(32);
A.ToBytes(publicKeyBytes);
var privateKey = Uint8List(PrivateKeySize);
arrayCopy(seed, 0, privateKey, 0, 32);
arrayCopy(publicKeyBytes, 0, privateKey, 32, 32);
return PrivateKey(privateKey);
}
/// Sign signs the message with privateKey and returns a signature. It will
/// throw ArumentError if privateKey.bytes.length is not PrivateKeySize.
Uint8List sign(PrivateKey privateKey, Uint8List message) {
if (privateKey.bytes.length != PrivateKeySize) {
throw ArgumentError(
'ed25519: bad privateKey length ${privateKey.bytes.length}');
}
var h = sha512.convert(privateKey.bytes.sublist(0, 32));
var digest1 = h.bytes;
var expandedSecretKey = digest1.sublist(0, 32);
expandedSecretKey[0] &= 248;
expandedSecretKey[31] &= 63;
expandedSecretKey[31] |= 64;
var output = AccumulatorSink<Digest>();
var input = sha512.startChunkedConversion(output);
input.add(digest1.sublist(32));
input.add(message);
input.close();
var messageDigest = output.events.single.bytes;
var messageDigestReduced = Uint8List(32);
ScReduce(messageDigestReduced, messageDigest as Uint8List);
var R = ExtendedGroupElement();
GeScalarMultBase(R, messageDigestReduced);
var encodedR = Uint8List(32);
R.ToBytes(encodedR);
output = AccumulatorSink<Digest>();
input = sha512.startChunkedConversion(output);
input.add(encodedR);
input.add(privateKey.bytes.sublist(32));
input.add(message);
input.close();
var hramDigest = output.events.single.bytes;
var hramDigestReduced = Uint8List(32);
ScReduce(hramDigestReduced, hramDigest as Uint8List);
var s = Uint8List(32);
ScMulAdd(s, hramDigestReduced, expandedSecretKey as Uint8List,
messageDigestReduced);
var signature = Uint8List(SignatureSize);
arrayCopy(encodedR, 0, signature, 0, 32);
arrayCopy(s, 0, signature, 32, 32);
return signature;
}
/// Verify reports whether sig is a valid signature of message by publicKey. It
/// will throw ArgumentError if publicKey.bytes.length is not PublicKeySize.
bool verify(PublicKey publicKey, Uint8List message, Uint8List sig) {
if (publicKey.bytes.length != PublicKeySize) {
throw ArgumentError(
'ed25519: bad publicKey length ${publicKey.bytes.length}');
}
if (sig.length != SignatureSize || sig[63] & 224 != 0) {
return false;
}
var A = ExtendedGroupElement();
var publicKeyBytes = Uint8List.fromList(publicKey.bytes);
if (!A.FromBytes(publicKeyBytes)) {
return false;
}
FeNeg(A.X, A.X);
FeNeg(A.T, A.T);
var output = AccumulatorSink<Digest>();
var input = sha512.startChunkedConversion(output);
input.add(sig.sublist(0, 32));
input.add(publicKeyBytes);
input.add(message);
input.close();
var digest = output.events.single.bytes;
var hReduced = Uint8List(32);
ScReduce(hReduced, digest as Uint8List);
var R = ProjectiveGroupElement();
var s = sig.sublist(32);
if (!ScMinimal(s)) {
return false;
}
GeDoubleScalarMultVartime(R, hReduced, A, s);
var checkR = Uint8List(32);
R.ToBytes(checkR);
return ListEquality().equals(sig.sublist(0, 32), checkR);
}

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ed25519_edwards/lib/src/const.dart
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ed25519_edwards/lib/src/edwards25519.dart
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18
ed25519_edwards/lib/src/numbers.dart
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import 'package:adaptive_number/adaptive_number.dart';
abstract class Numbers {
static Number v8 = Number(8);
static Number v15 = Number(15);
static Number v19 = Number(19);
static Number v24 = Number(24);
static Number v25 = Number(25);
static Number v26 = Number(26);
static Number v38 = Number(38);
static Number v136657 = Number(136657);
static Number v2097151 = Number(2097151);
static Number v470296 = Number(470296);
static Number v683901 = Number(683901);
static Number v654183 = Number(654183);
static Number v666643 = Number(666643);
static Number v997805 = Number(997805);
}

16
ed25519_edwards/lib/src/util.dart
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import 'dart:math';
import 'dart:typed_data';
void arrayCopy(List src, int srcPos, List dest, int destPos, int length) {
dest.setRange(destPos, length + destPos, src, srcPos);
}
final _defaultSecureRandom = Random.secure();
void fillBytesWithSecureRandomNumbers(Uint8List bytes, {Random? random}) {
random ??= _defaultSecureRandom;
for (var i = 0; i < bytes.length; i++) {
bytes[i] = random.nextInt(256);
}
}

18
ed25519_edwards/pubspec.yaml
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name: ed25519_edwards
description: Dart port of ed25519 from Go Cryptography ed25519
version: 0.3.1
homepage: https://github.com/Tougee/ed25519
environment:
sdk: '>=2.12.0 <3.0.0'
dependencies:
collection: ^1.15.0
crypto: ^3.0.0
convert: ^3.0.0
adaptive_number: ^1.0.0
dev_dependencies:
pedantic: ^1.10.0
test: ^1.16.4
hex: ^0.2.0
benchmark_harness: ^2.0.0

674
libsignal_protocol_dart/LICENSE
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GNU GENERAL PUBLIC LICENSE
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52
libsignal_protocol_dart/lib/libsignal_protocol_dart.dart
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@ -1,52 +0,0 @@
export 'src/decryption_callback.dart';
export 'src/duplicate_message_exception.dart';
export 'src/ecc/curve.dart';
export 'src/ecc/djb_ec_private_key.dart';
export 'src/ecc/djb_ec_public_key.dart';
export 'src/ecc/ec_key_pair.dart';
export 'src/ecc/ec_private_key.dart';
export 'src/ecc/ec_public_key.dart';
export 'src/fingerprint/displayable_fingerprint.dart';
export 'src/fingerprint/fingerprint.dart';
export 'src/fingerprint/numeric_fingerprint_generator.dart';
export 'src/fingerprint/scannable_fingerprint.dart';
export 'src/groups/group_cipher.dart';
export 'src/groups/group_session_builder.dart';
export 'src/groups/sender_key_name.dart';
export 'src/groups/state/in_memory_sender_key_store.dart';
export 'src/groups/state/sender_key_record.dart';
export 'src/groups/state/sender_key_store.dart';
export 'src/identity_key.dart';
export 'src/identity_key_pair.dart';
export 'src/invalid_key_exception.dart';
export 'src/invalid_key_id_exception.dart';
export 'src/legacy_message_exception.dart';
export 'src/no_session_exception.dart';
export 'src/protocol/ciphertext_message.dart';
export 'src/protocol/pre_key_signal_message.dart';
export 'src/protocol/sender_key_distribution_message_wrapper.dart';
export 'src/protocol/sender_key_message.dart';
export 'src/protocol/signal_message.dart';
export 'src/provisioning_cipher.dart';
export 'src/session_builder.dart';
export 'src/session_cipher.dart';
export 'src/signal_protocol_address.dart';
export 'src/state/identity_key_store.dart';
export 'src/state/impl/in_memory_identity_key_store.dart';
export 'src/state/impl/in_memory_pre_key_store.dart';
export 'src/state/impl/in_memory_session_store.dart';
export 'src/state/impl/in_memory_signal_protocol_store.dart';
export 'src/state/impl/in_memory_signed_pre_key_store.dart';
export 'src/state/pre_key_bundle.dart';
export 'src/state/pre_key_record.dart';
export 'src/state/pre_key_store.dart';
export 'src/state/session_record.dart';
export 'src/state/session_state.dart';
export 'src/state/session_store.dart';
export 'src/state/signal_protocol_store.dart';
export 'src/state/signed_pre_key_record.dart';
export 'src/state/signed_pre_key_store.dart';
export 'src/untrusted_identity_exception.dart';
export 'src/util/byte_util.dart';
export 'src/util/key_helper.dart';
export 'src/util/medium.dart';

40
libsignal_protocol_dart/lib/src/cbc.dart
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@ -1,40 +0,0 @@
import 'dart:typed_data';
import 'package:pointycastle/export.dart';
Uint8List aesCbcEncrypt(Uint8List key, Uint8List iv, Uint8List plaintext) {
final paddedPlaintext = pad(plaintext, 16);
final cbc = CBCBlockCipher(AESEngine())
..init(true, ParametersWithIV(KeyParameter(key), iv)); // true=encrypt
final cipherText = Uint8List(paddedPlaintext.length); // allocate space
var offset = 0;
while (offset < paddedPlaintext.length) {
offset += cbc.processBlock(paddedPlaintext, offset, cipherText, offset);
}
assert(offset == paddedPlaintext.length);
return cipherText;
}
Uint8List aesCbcDecrypt(Uint8List key, Uint8List iv, Uint8List cipherText) {
final cbc = CBCBlockCipher(AESEngine())
..init(false, ParametersWithIV(KeyParameter(key), iv)); // false=decrypt
final paddedPlainText = Uint8List(cipherText.length); // allocate space
var offset = 0;
while (offset < cipherText.length) {
offset += cbc.processBlock(cipherText, offset, paddedPlainText, offset);
}
assert(offset == cipherText.length);
return unpad(paddedPlainText);
}
Uint8List pad(Uint8List bytes, int blockSize) {
final padLength = blockSize - (bytes.length % blockSize);
final padded = Uint8List(bytes.length + padLength)..setAll(0, bytes);
PKCS7Padding().addPadding(padded, bytes.length);
return padded;
}
Uint8List unpad(Uint8List padded) =>
padded.sublist(0, padded.length - PKCS7Padding().padCount(padded));

3
libsignal_protocol_dart/lib/src/decryption_callback.dart
View file

@ -1,3 +0,0 @@
import 'dart:typed_data';
typedef DecryptionCallback = void Function(Uint8List plaintext);

41
libsignal_protocol_dart/lib/src/devices/device_consistency_code_generator.dart
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@ -1,41 +0,0 @@
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart';
import '../util/byte_util.dart';
import 'device_consistency_commitment.dart';
import 'device_consistency_signature.dart';
class DeviceConsistencyCodeGenerator {
static const int codeVersion = 0;
static String generateFor(DeviceConsistencyCommitment commitment,
List<DeviceConsistencySignature> signatures) {
final sortedSignatures = <DeviceConsistencySignature>[...signatures]
..sort(compareSignature);
final output = AccumulatorSink<Digest>();
final input = sha512.startChunkedConversion(output)
..add(ByteUtil.shortToByteArray(codeVersion))
..add(commitment.serialized);
for (final signature in sortedSignatures) {
input.add(signature.vrfOutput);
}
input.close();
final hash = output.events.single.bytes;
final digits = getEncodedChunk(Uint8List.fromList(hash), 0) +
getEncodedChunk(Uint8List.fromList(hash), 5);
return digits.substring(0, 6);
}
static String getEncodedChunk(Uint8List hash, int offset) {
final chunk = ByteUtil.byteArray5ToLong(hash, offset).remainder(100000);
return chunk.toString().padLeft(5, '0');
}
}
int compareSignature(
DeviceConsistencySignature a, DeviceConsistencySignature b) =>
ByteUtil.compare(a.vrfOutput, b.vrfOutput);

37
libsignal_protocol_dart/lib/src/devices/device_consistency_commitment.dart
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@ -1,37 +0,0 @@
import 'dart:convert';
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart';
import '../identity_key.dart';
import '../util/byte_util.dart';
class DeviceConsistencyCommitment {
DeviceConsistencyCommitment(int generation, List<IdentityKey> identityKeys) {
final sortedIdentityKeys = <IdentityKey>[...identityKeys]..sort((a, b) =>
ByteUtil.compare(a.publicKey.serialize(), b.publicKey.serialize()));
final output = AccumulatorSink<Digest>();
final input = sha512.startChunkedConversion(output)
..add(utf8.encode(version))
..add(ByteUtil.intToByteArray(generation));
for (final commitment in sortedIdentityKeys) {
input.add(commitment.publicKey.serialize());
}
input.close();
_generation = generation;
_serialized = Uint8List.fromList(output.events.single.bytes);
}
static const String version = 'DeviceConsistencyCommitment_V0';
late int _generation;
late Uint8List _serialized;
Uint8List get serialized => _serialized;
int get generation => _generation;
}

12
libsignal_protocol_dart/lib/src/devices/device_consistency_signature.dart
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@ -1,12 +0,0 @@
import 'dart:typed_data';
class DeviceConsistencySignature {
DeviceConsistencySignature(this._signature, this._vrfOutput);
final Uint8List _signature;
final Uint8List _vrfOutput;
Uint8List get vrfOutput => _vrfOutput;
Uint8List get signature => _signature;
}

7
libsignal_protocol_dart/lib/src/duplicate_message_exception.dart
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@ -1,7 +0,0 @@
class DuplicateMessageException implements Exception {
DuplicateMessageException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'DuplicateMessageException - $detailMessage';
}

187
libsignal_protocol_dart/lib/src/ecc/curve.dart
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@ -1,187 +0,0 @@
import 'dart:typed_data';
import 'package:x25519/x25519.dart' as x25519;
import '../invalid_key_exception.dart';
import '../util/key_helper.dart';
import 'djb_ec_private_key.dart';
import 'djb_ec_public_key.dart';
import 'ec_key_pair.dart';
import 'ec_private_key.dart';
import 'ec_public_key.dart';
import 'ed25519.dart';
typedef KeyPairGenerator = GeneratedKeyPair Function();
typedef AgreementCalculator = Uint8List Function(Uint8List, Uint8List);
class GeneratedKeyPair {
GeneratedKeyPair(this.private, this.public);
final Uint8List private;
final Uint8List public;
}
class Curve {
static const int djbType = 0x05;
static KeyPairGenerator? keyPairGenerator;
static AgreementCalculator? agreementCalculator;
static ECKeyPair generateKeyPair() {
final x25519.KeyPair keyPair;
final generator = keyPairGenerator;
if (generator != null) {
final kp = generator();
keyPair = x25519.KeyPair(privateKey: kp.private, publicKey: kp.public);
} else {
keyPair = x25519.generateKeyPair();
}
return ECKeyPair(DjbECPublicKey(Uint8List.fromList(keyPair.publicKey)),
DjbECPrivateKey(Uint8List.fromList(keyPair.privateKey)));
}
static ECKeyPair generateKeyPairFromPrivate(List<int> private) {
if (private.length != 32) {
throw InvalidKeyException(
'Invalid private key length: ${private.length}');
}
final public = List<int>.filled(32, 0);
private[0] &= 248;
private[31] &= 127;
private[31] |= 64;
x25519.ScalarBaseMult(public, private);
return ECKeyPair(DjbECPublicKey(Uint8List.fromList(public)),
DjbECPrivateKey(Uint8List.fromList(private)));
}
static ECPublicKey decodePointList(List<int> bytes, int offset) =>
decodePoint(Uint8List.fromList(bytes), offset);
static ECPublicKey decodePoint(Uint8List bytes, int offset) {
if (bytes.length - offset < 1) {
throw InvalidKeyException('No key type identifier');
}
final type = bytes[offset] & 0xFF;
switch (type) {
case Curve.djbType:
if (bytes.length - offset < 33) {
throw InvalidKeyException('Bad key length: ${bytes.length}');
}
final keyBytes = Uint8List(32);
arraycopy(bytes, offset + 1, keyBytes, 0, keyBytes.length);
return DjbECPublicKey(keyBytes);
default:
throw InvalidKeyException('Bad key type: $type');
}
}
static void arraycopy(
List<int> src, int srcPos, List<int> dest, int destPos, int length) {
dest.setRange(destPos, length + destPos, src, srcPos);
}
static ECPrivateKey decodePrivatePoint(Uint8List bytes) =>
DjbECPrivateKey(bytes);
static Uint8List calculateAgreement(
ECPublicKey? publicKey, ECPrivateKey? privateKey) {
if (publicKey == null) {
throw Exception('publicKey value is null');
}
if (privateKey == null) {
throw Exception('privateKey value is null');
}
if (publicKey.getType() != privateKey.getType()) {
throw Exception('Public and private keys must be of the same type!');
}
if (publicKey.getType() == djbType) {
final calculator = agreementCalculator;
if (calculator != null) {
return calculator(
(privateKey as DjbECPrivateKey).privateKey,
(publicKey as DjbECPublicKey).publicKey,
);
}
final secretKey = x25519.X25519(
List<int>.from((privateKey as DjbECPrivateKey).privateKey),
List<int>.from((publicKey as DjbECPublicKey).publicKey),
);
return secretKey;
} else {
throw Exception('Unknown type: ${publicKey.getType()}');
}
}
static bool verifySignature(
ECPublicKey? signingKey, Uint8List? message, Uint8List? signature) {
if (signingKey == null || message == null || signature == null) {
throw InvalidKeyException('Values must not be null');
}
if (signingKey.getType() == djbType) {
if (signature.length != 64) {
return false;
}
final publicKey = (signingKey as DjbECPublicKey).publicKey;
return verifySig(publicKey, message, signature);
} else {
throw InvalidKeyException(
'Unknown Signing Key type${signingKey.getType()}');
}
}
static Uint8List calculateSignature(
ECPrivateKey? signingKey, Uint8List? message) {
if (signingKey == null || message == null) {
throw Exception('Values must not be null');
}
if (signingKey.getType() == djbType) {
final privateKey = signingKey.serialize();
final random = generateRandomBytes();
return sign(privateKey, message, random);
} else {
throw Exception('Unknown Signing Key type${signingKey.getType()}');
}
}
static Uint8List calculateVrfSignature(
ECPrivateKey? signingKey, Uint8List? message) {
if (signingKey == null || message == null) {
throw Exception('Values must not be null');
}
if (signingKey.getType() == djbType) {
// TODO
} else {
throw Exception('Unknown Signing Key type${signingKey.getType()}');
}
return Uint8List(0);
}
static Uint8List verifyVrfSignature(
ECPublicKey? signingKey, Uint8List? message, Uint8List? signature) {
if (signingKey == null || message == null || signature == null) {
throw Exception('Values must not be null');
}
if (signingKey.getType() == djbType) {
// TODO
} else {
throw Exception('Unknown Signing Key type${signingKey.getType()}');
}
return Uint8List(0);
}
}

18
libsignal_protocol_dart/lib/src/ecc/djb_ec_private_key.dart
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@ -1,18 +0,0 @@
import 'dart:typed_data';
import 'curve.dart';
import 'ec_private_key.dart';
class DjbECPrivateKey extends ECPrivateKey {
DjbECPrivateKey(this._privateKey);
final Uint8List _privateKey;
@override
int getType() => Curve.djbType;
@override
Uint8List serialize() => privateKey;
Uint8List get privateKey => _privateKey;
}

44
libsignal_protocol_dart/lib/src/ecc/djb_ec_public_key.dart
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@ -1,44 +0,0 @@
import 'dart:typed_data';
import 'package:meta/meta.dart';
import '../eq.dart';
import 'curve.dart';
import 'ec_public_key.dart';
@immutable
class DjbECPublicKey extends ECPublicKey {
DjbECPublicKey(this._publicKey);
final Uint8List _publicKey;
@override
int getType() => Curve.djbType;
@override
Uint8List serialize() => Uint8List.fromList([Curve.djbType] + _publicKey);
Uint8List get publicKey => _publicKey;
@override
int compareTo(ECPublicKey another) => decodeBigInt(publicKey)
.compareTo(decodeBigInt((another as DjbECPublicKey).publicKey));
@override
bool operator ==(Object other) {
if (other is! DjbECPublicKey) return false;
return eq(_publicKey, other._publicKey);
}
@override
int get hashCode => _publicKey.hashCode;
BigInt decodeBigInt(List<int> bytes) {
var result = BigInt.from(0);
for (var i = 0; i < bytes.length; i++) {
result += BigInt.from(bytes[bytes.length - i - 1]) << (8 * i);
}
return result;
}
}

13
libsignal_protocol_dart/lib/src/ecc/ec_key_pair.dart
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@ -1,13 +0,0 @@
import 'ec_private_key.dart';
import 'ec_public_key.dart';
class ECKeyPair {
ECKeyPair(this._publicKey, this._privateKey);
final ECPublicKey _publicKey;
final ECPrivateKey _privateKey;
ECPublicKey get publicKey => _publicKey;
ECPrivateKey get privateKey => _privateKey;
}

6
libsignal_protocol_dart/lib/src/ecc/ec_private_key.dart
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@ -1,6 +0,0 @@
import 'dart:typed_data';
abstract class ECPrivateKey {
Uint8List serialize();
int getType();
}

8
libsignal_protocol_dart/lib/src/ecc/ec_public_key.dart
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@ -1,8 +0,0 @@
import 'dart:typed_data';
abstract class ECPublicKey implements Comparable<ECPublicKey> {
static const int keySize = 33;
Uint8List serialize();
int getType();
}

117
libsignal_protocol_dart/lib/src/ecc/ed25519.dart
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@ -1,117 +0,0 @@
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart' as cr;
import 'package:ed25519_edwards/ed25519_edwards.dart';
// ignore: implementation_imports
import 'package:ed25519_edwards/src/edwards25519.dart';
import 'curve.dart';
Uint8List sign(Uint8List privateKey, Uint8List message, Uint8List random) {
final A = ExtendedGroupElement();
final publicKey = Uint8List(32);
GeScalarMultBase(A, privateKey);
A.ToBytes(publicKey);
// Calculate r
final diversifier = Uint8List.fromList([
0xFE,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF,
0xFF
]);
var output = AccumulatorSink<cr.Digest>();
cr.sha512.startChunkedConversion(output)
..add(diversifier)
..add(privateKey)
..add(message)
..add(random)
..close();
final r = output.events.single.bytes;
final rReduced = Uint8List(32);
ScReduce(rReduced, Uint8List.fromList(r));
final R = ExtendedGroupElement();
GeScalarMultBase(R, rReduced);
final encodedR = Uint8List(32);
R.ToBytes(encodedR);
output = AccumulatorSink<cr.Digest>();
cr.sha512.startChunkedConversion(output)
..add(encodedR)
..add(publicKey)
..add(message)
..close();
final hramDigest = output.events.single.bytes;
final hramDigestReduced = Uint8List(32);
ScReduce(hramDigestReduced, Uint8List.fromList(hramDigest));
final s = Uint8List(32);
ScMulAdd(s, hramDigestReduced, privateKey, rReduced);
final signature = Uint8List(64);
Curve.arraycopy(encodedR, 0, signature, 0, 32);
Curve.arraycopy(s, 0, signature, 32, 32);
signature[63] |= publicKey[31] & 0x80;
return signature;
}
// verify checks whether the message has a valid signature.
bool verifySig(Uint8List publicKey, Uint8List message, Uint8List signature) {
publicKey[31] &= 0x7F;
final edY = FieldElement();
final one = FieldElement();
final montX = FieldElement();
final montXMinusOne = FieldElement();
final montXPlusOne = FieldElement();
FeFromBytes(montX, publicKey);
FeOne(one);
FeSub(montXMinusOne, montX, one);
FeAdd(montXPlusOne, montX, one);
FeInvert(montXPlusOne, montXPlusOne);
FeMul(edY, montXMinusOne, montXPlusOne);
// ignore: non_constant_identifier_names
final A_ed = Uint8List(32);
FeToBytes(A_ed, edY);
A_ed[31] |= signature[63] & 0x80;
signature[63] &= 0x7F;
// bool verify(PublicKey publicKey, Uint8List message, Uint8List sig) {
return verify(PublicKey(A_ed.toList()), message, signature);
}

6
libsignal_protocol_dart/lib/src/entry.dart
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@ -1,6 +0,0 @@
import 'dart:collection';
base class Entry<T> extends LinkedListEntry<Entry<T>> {
Entry(this.value);
T value;
}

4
libsignal_protocol_dart/lib/src/eq.dart
View file

@ -1,4 +0,0 @@
import 'package:collection/collection.dart';
bool eq<E>(List<E>? list1, List<E>? list2) =>
ListEquality<E>().equals(list1, list2);

35
libsignal_protocol_dart/lib/src/fingerprint/displayable_fingerprint.dart
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@ -1,35 +0,0 @@
import 'dart:typed_data';
import '../util/byte_util.dart';
class DisplayableFingerprint {
DisplayableFingerprint(
Uint8List localFingerprint, Uint8List remoteFingerprint) {
localFingerprintNumbers = _getDisplayStringFor(localFingerprint);
remoteFingerprintNumbers = _getDisplayStringFor(remoteFingerprint);
}
late String localFingerprintNumbers;
late String remoteFingerprintNumbers;
String getDisplayText() {
if (localFingerprintNumbers.compareTo(remoteFingerprintNumbers) <= 0) {
return localFingerprintNumbers + remoteFingerprintNumbers;
} else {
return remoteFingerprintNumbers + localFingerprintNumbers;
}
}
String _getDisplayStringFor(Uint8List fingerprint) =>
_getEncodedChunk(fingerprint, 0) +
_getEncodedChunk(fingerprint, 5) +
_getEncodedChunk(fingerprint, 10) +
_getEncodedChunk(fingerprint, 15) +
_getEncodedChunk(fingerprint, 20) +
_getEncodedChunk(fingerprint, 25);
String _getEncodedChunk(Uint8List hash, int offset) {
final chunk = ByteUtil.byteArray5ToLong(hash, offset).remainder(100000);
return chunk.toString().padLeft(5, '0');
}
}

12
libsignal_protocol_dart/lib/src/fingerprint/fingerprint.dart
View file

@ -1,12 +0,0 @@
import 'displayable_fingerprint.dart';
import 'scannable_fingerprint.dart';
class Fingerprint {
Fingerprint(this._displayableFingerprint, this._scannableFingerprint);
final DisplayableFingerprint _displayableFingerprint;
final ScannableFingerprint _scannableFingerprint;
DisplayableFingerprint get displayableFingerprint => _displayableFingerprint;
ScannableFingerprint get scannableFingerprint => _scannableFingerprint;
}

20
libsignal_protocol_dart/lib/src/fingerprint/fingerprint_generator.dart
View file

@ -1,20 +0,0 @@
import 'dart:typed_data';
import '../identity_key.dart';
import 'fingerprint.dart';
abstract class FingerprintGenerator {
Fingerprint createFor(
int version,
Uint8List localStableIdentifier,
IdentityKey localIdentityKey,
Uint8List remoteStableIdentifier,
IdentityKey remoteIdentityKey);
Fingerprint createListFor(
int version,
Uint8List localStableIdentifier,
List<IdentityKey> localIdentityKey,
Uint8List remoteStableIdentifier,
List<IdentityKey> remoteIdentityKey);
}

8
libsignal_protocol_dart/lib/src/fingerprint/fingerprint_parsing_exception.dart
View file

@ -1,8 +0,0 @@
class FingerprintParsingException implements Exception {
FingerprintParsingException(this._message);
final Exception _message;
@override
String toString() => 'FingerprintParsingException - $_message';
}

8
libsignal_protocol_dart/lib/src/fingerprint/fingerprint_version_mismatch_exception.dart
View file

@ -1,8 +0,0 @@
class FingerprintVersionMismatchException implements Exception {
FingerprintVersionMismatchException(this._theirVersion, this._ourVersion);
// ignore: unused_field
final int _theirVersion;
// ignore: unused_field
final int _ourVersion;
}

79
libsignal_protocol_dart/lib/src/fingerprint/numeric_fingerprint_generator.dart
View file

@ -1,79 +0,0 @@
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart';
import '../identity_key.dart';
import '../util/byte_util.dart';
import '../util/identity_key_comparator.dart';
import 'displayable_fingerprint.dart';
import 'fingerprint.dart';
import 'fingerprint_generator.dart';
import 'scannable_fingerprint.dart';
class NumericFingerprintGenerator implements FingerprintGenerator {
NumericFingerprintGenerator(this._iterations);
static const int fingerprintVersion = 0;
final int _iterations;
@override
Fingerprint createFor(
int version,
Uint8List localStableIdentifier,
IdentityKey localIdentityKey,
Uint8List remoteStableIdentifier,
IdentityKey remoteIdentityKey) =>
createListFor(version, localStableIdentifier, [localIdentityKey],
remoteStableIdentifier, [remoteIdentityKey]);
@override
Fingerprint createListFor(
int version,
Uint8List localStableIdentifier,
List<IdentityKey> localIdentityKey,
Uint8List remoteStableIdentifier,
List<IdentityKey> remoteIdentityKey) {
final localFingerprint =
_getFingerprint(_iterations, localStableIdentifier, localIdentityKey);
final remoteFingerprint =
_getFingerprint(_iterations, remoteStableIdentifier, remoteIdentityKey);
final displayableFingerprint =
DisplayableFingerprint(localFingerprint, remoteFingerprint);
final scannableFingerprint =
ScannableFingerprint(version, localFingerprint, remoteFingerprint);
return Fingerprint(displayableFingerprint, scannableFingerprint);
}
Uint8List _getFingerprint(int iterations, Uint8List stableIdentifier,
List<IdentityKey> unsortedIdentityKeys) {
final publicKey = _getLogicalKeyBytes(unsortedIdentityKeys);
var hash = ByteUtil.combine([
ByteUtil.shortToByteArray(fingerprintVersion),
publicKey,
stableIdentifier
]);
for (var i = 0; i < iterations; i++) {
final output = AccumulatorSink<Digest>();
sha512.startChunkedConversion(output)
..add(hash)
..add(publicKey)
..close();
hash = Uint8List.fromList(output.events.single.bytes);
}
return hash;
}
Uint8List _getLogicalKeyBytes(List<IdentityKey> identityKeys) {
final sortedIdentityKeys = [...identityKeys]..sort(identityKeyComparator);
final keys = <int>[];
sortedIdentityKeys.forEach((key) {
final publicKeyBytes = key.publicKey.serialize();
keys.addAll(publicKeyBytes.toList());
});
return Uint8List.fromList(keys);
}
}

49
libsignal_protocol_dart/lib/src/fingerprint/scannable_fingerprint.dart
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@ -1,49 +0,0 @@
import 'dart:typed_data';
import 'package:crypto/crypto.dart';
import 'package:protobuf/protobuf.dart';
import '../state/fingerprint_protocol.pb.dart';
import '../util/byte_util.dart';
import 'fingerprint_parsing_exception.dart';
import 'fingerprint_version_mismatch_exception.dart';
class ScannableFingerprint {
ScannableFingerprint(int version, Uint8List localFingerprintData,
Uint8List remoteFingerprintData) {
final localFingerprint = LogicalFingerprint.create()
..content = ByteUtil.trim(localFingerprintData, 32);
final remoteFingerprint = LogicalFingerprint.create()
..content = ByteUtil.trim(remoteFingerprintData, 32);
_version = version;
_fingerprints = CombinedFingerprints.create()
..version = version
..localFingerprint = localFingerprint
..remoteFingerprint = remoteFingerprint;
}
late int _version;
late CombinedFingerprints _fingerprints;
bool compareTo(Uint8List scannedFingerprintData) {
try {
final scanned = CombinedFingerprints.fromBuffer(scannedFingerprintData);
if (!scanned.hasRemoteFingerprint() ||
!scanned.hasLocalFingerprint() ||
!scanned.hasVersion() ||
scanned.version != _version) {
throw FingerprintVersionMismatchException(scanned.version, _version);
}
return Digest(_fingerprints.localFingerprint.content) ==
Digest(scanned.remoteFingerprint.content) &&
Digest(_fingerprints.remoteFingerprint.content) ==
Digest(scanned.localFingerprint.content);
} on InvalidProtocolBufferException catch (e) {
throw FingerprintParsingException(e);
}
}
Uint8List get fingerprints => _fingerprints.writeToBuffer();
}

98
libsignal_protocol_dart/lib/src/groups/group_cipher.dart
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@ -1,98 +0,0 @@
import 'dart:typed_data';
import '../cbc.dart';
import '../decryption_callback.dart';
import '../duplicate_message_exception.dart';
import '../invalid_key_exception.dart';
import '../invalid_key_id_exception.dart';
import '../invalid_message_exception.dart';
import '../no_session_exception.dart';
import '../protocol/sender_key_message.dart';
import 'ratchet/sender_message_key.dart';
import 'sender_key_name.dart';
import 'state/sender_key_state.dart';
import 'state/sender_key_store.dart';
class GroupCipher {
GroupCipher(this._senderKeyStore, this._senderKeyId);
final SenderKeyStore _senderKeyStore;
final SenderKeyName _senderKeyId;
Future<Uint8List> encrypt(Uint8List paddedPlaintext) async {
try {
final record = await _senderKeyStore.loadSenderKey(_senderKeyId);
final senderKeyState = record.getSenderKeyState();
final senderKey = senderKeyState.senderChainKey.senderMessageKey;
final ciphertext =
aesCbcEncrypt(senderKey.cipherKey, senderKey.iv, paddedPlaintext);
final senderKeyMessage = SenderKeyMessage(senderKeyState.keyId,
senderKey.iteration, ciphertext, senderKeyState.signingKeyPrivate);
final nextSenderChainKey = senderKeyState.senderChainKey.next;
senderKeyState.senderChainKey = nextSenderChainKey;
await _senderKeyStore.storeSenderKey(_senderKeyId, record);
return senderKeyMessage.serialize();
} on InvalidKeyIdException catch (e) {
throw NoSessionException(e.detailMessage);
}
}
Future<Uint8List> decrypt(Uint8List senderKeyMessageBytes) async =>
decryptWithCallback(senderKeyMessageBytes, () {}());
Future<Uint8List> decryptWithCallback(
Uint8List senderKeyMessageBytes, DecryptionCallback? callback) async {
try {
final record = await _senderKeyStore.loadSenderKey(_senderKeyId);
if (record.isEmpty) {
throw NoSessionException(
'No group sender key for: ${_senderKeyId.serialize()}');
}
final senderKeyMessage =
SenderKeyMessage.fromSerialized(senderKeyMessageBytes);
final senderKeyState =
record.getSenderKeyStateById(senderKeyMessage.keyId);
senderKeyMessage.verifySignature(senderKeyState.signingKeyPublic);
final senderKey =
getSenderKey(senderKeyState, senderKeyMessage.iteration);
final plaintext = aesCbcDecrypt(
senderKey.cipherKey, senderKey.iv, senderKeyMessage.ciphertext);
if (callback != null) {
callback(plaintext);
}
await _senderKeyStore.storeSenderKey(_senderKeyId, record);
return plaintext;
} on InvalidKeyIdException catch (e) {
throw InvalidMessageException(e.detailMessage);
} on InvalidKeyException catch (e) {
throw InvalidMessageException(e.detailMessage);
}
}
SenderMessageKey getSenderKey(SenderKeyState senderKeyState, int iteration) {
var senderChainKey = senderKeyState.senderChainKey;
if (senderChainKey.iteration > iteration) {
if (senderKeyState.hasSenderMessageKey(iteration)) {
return senderKeyState.removeSenderMessageKey(iteration)!;
} else {
throw DuplicateMessageException('Received message with old counter: '
'${senderChainKey.iteration} , $iteration');
}
}
if (iteration - senderChainKey.iteration > 2000) {
throw InvalidMessageException('Over 2000 messages into the future!');
}
while (senderChainKey.iteration < iteration) {
senderKeyState.addSenderMessageKey(senderChainKey.senderMessageKey);
senderChainKey = senderChainKey.next;
}
senderKeyState.senderChainKey = senderChainKey.next;
return senderChainKey.senderMessageKey;
}
}

48
libsignal_protocol_dart/lib/src/groups/group_session_builder.dart
View file

@ -1,48 +0,0 @@
import '../invalid_key_exception.dart';
import '../invalid_key_id_exception.dart';
import '../protocol/sender_key_distribution_message_wrapper.dart';
import '../util/key_helper.dart';
import 'sender_key_name.dart';
import 'state/sender_key_store.dart';
class GroupSessionBuilder {
GroupSessionBuilder(this._senderKeyStore);
final SenderKeyStore _senderKeyStore;
Future<void> process(
SenderKeyName senderKeyName,
SenderKeyDistributionMessageWrapper
senderKeyDistributionMessageWrapper) async {
final senderKeyRecord = await _senderKeyStore.loadSenderKey(senderKeyName);
senderKeyRecord.addSenderKeyState(
senderKeyDistributionMessageWrapper.id,
senderKeyDistributionMessageWrapper.iteration,
senderKeyDistributionMessageWrapper.chainKey,
senderKeyDistributionMessageWrapper.signatureKey);
await _senderKeyStore.storeSenderKey(senderKeyName, senderKeyRecord);
}
Future<SenderKeyDistributionMessageWrapper> create(
SenderKeyName senderKeyName) async {
try {
final senderKeyRecord =
await _senderKeyStore.loadSenderKey(senderKeyName);
if (senderKeyRecord.isEmpty) {
senderKeyRecord.setSenderKeyState(generateSenderKeyId(), 0,
generateSenderKey(), generateSenderSigningKey());
await _senderKeyStore.storeSenderKey(senderKeyName, senderKeyRecord);
}
final state = senderKeyRecord.getSenderKeyState();
return SenderKeyDistributionMessageWrapper(
state.keyId,
state.senderChainKey.iteration,
state.senderChainKey.seed,
state.signingKeyPublic);
} on InvalidKeyIdException catch (e) {
throw AssertionError(e);
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
}

31
libsignal_protocol_dart/lib/src/groups/ratchet/sender_chain_key.dart
View file

@ -1,31 +0,0 @@
import 'dart:typed_data';
import 'package:crypto/crypto.dart';
import 'sender_message_key.dart';
class SenderChainKey {
SenderChainKey(this._iteration, this._chainKey);
static final Uint8List _messageKeySeed = Uint8List.fromList([0x01]);
static final Uint8List _chainKeySeed = Uint8List.fromList([0x02]);
final int _iteration;
final Uint8List _chainKey;
int get iteration => _iteration;
Uint8List get seed => _chainKey;
SenderMessageKey get senderMessageKey =>
SenderMessageKey(_iteration, getDerivative(_messageKeySeed, _chainKey));
SenderChainKey get next =>
SenderChainKey(_iteration + 1, getDerivative(_chainKeySeed, _chainKey));
Uint8List getDerivative(Uint8List seed, Uint8List key) {
final hmacSha256 = Hmac(sha256, key);
final digest = hmacSha256.convert(seed);
return Uint8List.fromList(digest.bytes);
}
}

24
libsignal_protocol_dart/lib/src/groups/ratchet/sender_message_key.dart
View file

@ -1,24 +0,0 @@
import 'dart:typed_data';
import '../../kdf/hkdfv3.dart';
import '../../util/byte_util.dart';
class SenderMessageKey {
SenderMessageKey(this._iteration, this._seed) {
final derivative = HKDFv3()
.deriveSecrets(seed, Uint8List.fromList('WhisperGroup'.codeUnits), 48);
final parts = ByteUtil.splitTwo(derivative, 16, 32);
_iv = parts[0];
_cipherKey = parts[1];
}
final int _iteration;
final Uint8List _seed;
late Uint8List _iv;
late Uint8List _cipherKey;
int get iteration => _iteration;
Uint8List get iv => _iv;
Uint8List get cipherKey => _cipherKey;
Uint8List get seed => _seed;
}

28
libsignal_protocol_dart/lib/src/groups/sender_key_name.dart
View file

@ -1,28 +0,0 @@
import 'package:meta/meta.dart';
import '../signal_protocol_address.dart';
@immutable
class SenderKeyName {
const SenderKeyName(this._groupId, this._sender);
final String _groupId;
final SignalProtocolAddress _sender;
String get groupId => _groupId;
SignalProtocolAddress get sender => _sender;
String serialize() =>
'$_groupId::${_sender.getName()}::${_sender.getDeviceId()}';
@override
bool operator ==(Object other) {
if (other is! SenderKeyName) return false;
return _groupId == other.groupId && _sender == other.sender;
}
@override
int get hashCode => _groupId.hashCode ^ _sender.hashCode;
}

29
libsignal_protocol_dart/lib/src/groups/state/in_memory_sender_key_store.dart
View file

@ -1,29 +0,0 @@
import 'dart:collection';
import '../sender_key_name.dart';
import 'sender_key_record.dart';
import 'sender_key_store.dart';
class InMemorySenderKeyStore extends SenderKeyStore {
final _store = HashMap<SenderKeyName, SenderKeyRecord>();
@override
Future<SenderKeyRecord> loadSenderKey(SenderKeyName senderKeyName) async {
try {
final record = _store[senderKeyName];
if (record == null) {
return SenderKeyRecord();
} else {
return SenderKeyRecord.fromSerialized(record.serialize());
}
} on Exception catch (e) {
throw AssertionError(e);
}
}
@override
Future<void> storeSenderKey(
SenderKeyName senderKeyName, SenderKeyRecord record) async {
_store[senderKeyName] = record;
}
}

71
libsignal_protocol_dart/lib/src/groups/state/sender_key_record.dart
View file

@ -1,71 +0,0 @@
import 'dart:collection';
import 'dart:typed_data';
import '../../ecc/ec_key_pair.dart';
import '../../ecc/ec_public_key.dart';
import '../../entry.dart';
import '../../invalid_key_id_exception.dart';
import '../../state/local_storage_protocol.pb.dart';
import 'sender_key_state.dart';
class SenderKeyRecord {
SenderKeyRecord();
SenderKeyRecord.fromSerialized(Uint8List serialized) {
final senderKeyRecordStructure =
SenderKeyRecordStructure.fromBuffer(serialized);
for (final structure in senderKeyRecordStructure.senderKeyStates) {
_senderKeyStates
.add(Entry(SenderKeyState.fromSenderKeyStateStructure(structure)));
}
}
static const int _maxStates = 5;
final LinkedList<Entry<SenderKeyState>> _senderKeyStates =
LinkedList<Entry<SenderKeyState>>();
bool get isEmpty => _senderKeyStates.isEmpty;
SenderKeyState getSenderKeyState() {
if (_senderKeyStates.isNotEmpty) {
return _senderKeyStates.first.value;
} else {
throw InvalidKeyIdException('No key state in record!');
}
}
SenderKeyState getSenderKeyStateById(int keyId) {
for (final state in _senderKeyStates) {
if (state.value.keyId == keyId) {
return state.value;
}
}
throw InvalidKeyIdException('No key for: $keyId');
}
void addSenderKeyState(
int id, int iteration, Uint8List chainKey, ECPublicKey signatureKey) {
_senderKeyStates.addFirst(Entry(
SenderKeyState.fromPublicKey(id, iteration, chainKey, signatureKey)));
if (_senderKeyStates.length > _maxStates) {
_senderKeyStates.remove(_senderKeyStates.last);
}
}
void setSenderKeyState(
int id, int iteration, Uint8List chainKey, ECKeyPair signatureKey) {
_senderKeyStates
..clear()
..add(Entry(
SenderKeyState.fromKeyPair(id, iteration, chainKey, signatureKey)));
}
Uint8List serialize() {
final recordStructure = SenderKeyRecordStructure.create();
_senderKeyStates.forEach((entry) {
recordStructure.senderKeyStates.add(entry.value.structure);
});
return recordStructure.writeToBuffer();
}
}

107
libsignal_protocol_dart/lib/src/groups/state/sender_key_state.dart
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@ -1,107 +0,0 @@
import 'dart:typed_data';
import 'package:optional/optional.dart';
import '../../ecc/curve.dart';
import '../../ecc/ec_key_pair.dart';
import '../../ecc/ec_private_key.dart';
import '../../ecc/ec_public_key.dart';
import '../../state/local_storage_protocol.pb.dart';
import '../ratchet/sender_chain_key.dart';
import '../ratchet/sender_message_key.dart';
class SenderKeyState {
SenderKeyState.fromPublicKey(int id, int iteration, Uint8List chainKey,
ECPublicKey signatureKeyPublic) {
init(id, iteration, chainKey, signatureKeyPublic, const Optional.empty());
}
SenderKeyState.fromKeyPair(
int id, int iteration, Uint8List chainKey, ECKeyPair signatureKey) {
final signatureKeyPublic = signatureKey.publicKey;
final signatureKeyPrivate = Optional.of(signatureKey.privateKey);
init(id, iteration, chainKey, signatureKeyPublic, signatureKeyPrivate);
}
SenderKeyState.fromSenderKeyStateStructure(
SenderKeyStateStructure senderKeyStateStructure) {
_senderKeyStateStructure = senderKeyStateStructure;
}
static const int _maxMessageKeys = 2000;
late SenderKeyStateStructure _senderKeyStateStructure;
void init(
int id, int iteration, Uint8List chainKey, ECPublicKey signatureKeyPublic,
[Optional<ECPrivateKey>? signatureKeyPrivate]) {
final seed = Uint8List.fromList(chainKey);
final senderChainKeyStructure =
SenderKeyStateStructureSenderChainKey.create()
..iteration = iteration
..seed = seed;
final signingKeyStructure = SenderKeyStateStructureSenderSigningKey.create()
..public = signatureKeyPublic.serialize();
if (signatureKeyPrivate!.isPresent) {
signingKeyStructure.private = signatureKeyPrivate.value.serialize();
}
_senderKeyStateStructure = SenderKeyStateStructure.create()
..senderKeyId = id
..senderChainKey = senderChainKeyStructure
..senderSigningKey = signingKeyStructure;
}
int get keyId => _senderKeyStateStructure.senderKeyId;
SenderChainKey get senderChainKey => SenderChainKey(
_senderKeyStateStructure.senderChainKey.iteration,
Uint8List.fromList(_senderKeyStateStructure.senderChainKey.seed));
set senderChainKey(SenderChainKey senderChainKey) => {
_senderKeyStateStructure.senderChainKey =
SenderKeyStateStructureSenderChainKey.create()
..iteration = senderChainKey.iteration
..seed = List.from(senderChainKey.seed)
};
ECPublicKey get signingKeyPublic => Curve.decodePointList(
_senderKeyStateStructure.senderSigningKey.public, 0);
ECPrivateKey get signingKeyPrivate => Curve.decodePrivatePoint(
Uint8List.fromList(_senderKeyStateStructure.senderSigningKey.private));
bool hasSenderMessageKey(int iteration) {
for (final senderMessageKey in _senderKeyStateStructure.senderMessageKeys) {
if (senderMessageKey.iteration == iteration) {
return true;
}
}
return false;
}
void addSenderMessageKey(SenderMessageKey senderMessageKey) {
final senderMessageKeyStructure =
SenderKeyStateStructureSenderMessageKey.create()
..iteration = senderMessageKey.iteration
..seed = senderMessageKey.seed;
_senderKeyStateStructure.senderMessageKeys.add(senderMessageKeyStructure);
if (_senderKeyStateStructure.senderMessageKeys.length > _maxMessageKeys) {
_senderKeyStateStructure.senderMessageKeys.removeAt(0);
}
}
SenderMessageKey? removeSenderMessageKey(int iteration) {
_senderKeyStateStructure.senderMessageKeys
.toList()
.addAll(_senderKeyStateStructure.senderMessageKeys);
final index = _senderKeyStateStructure.senderMessageKeys
.indexWhere((item) => item.iteration == iteration);
if (index == -1) return null;
final senderMessageKey =
_senderKeyStateStructure.senderMessageKeys.removeAt(index);
return SenderMessageKey(
senderMessageKey.iteration, Uint8List.fromList(senderMessageKey.seed));
}
SenderKeyStateStructure get structure => _senderKeyStateStructure;
}

9
libsignal_protocol_dart/lib/src/groups/state/sender_key_store.dart
View file

@ -1,9 +0,0 @@
import '../sender_key_name.dart';
import 'sender_key_record.dart';
abstract class SenderKeyStore {
Future<void> storeSenderKey(
SenderKeyName senderKeyName, SenderKeyRecord record);
Future<SenderKeyRecord> loadSenderKey(SenderKeyName senderKeyName);
}

33
libsignal_protocol_dart/lib/src/identity_key.dart
View file

@ -1,33 +0,0 @@
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:meta/meta.dart';
import 'ecc/curve.dart';
import 'ecc/ec_public_key.dart';
@immutable
class IdentityKey {
const IdentityKey(this._publicKey);
factory IdentityKey.fromBytes(Uint8List bytes, int offset) =>
IdentityKey(Curve.decodePoint(bytes, offset));
final ECPublicKey _publicKey;
ECPublicKey get publicKey => _publicKey;
Uint8List serialize() => _publicKey.serialize();
String getFingerprint() => hex.encode(_publicKey.serialize());
@override
bool operator ==(Object other) {
if (other is! IdentityKey) return false;
return _publicKey == other._publicKey;
}
@override
int get hashCode => _publicKey.hashCode;
}

32
libsignal_protocol_dart/lib/src/identity_key_pair.dart
View file

@ -1,32 +0,0 @@
import 'dart:typed_data';
import 'ecc/curve.dart';
import 'ecc/ec_private_key.dart';
import 'identity_key.dart';
import 'state/local_storage_protocol.pb.dart';
class IdentityKeyPair {
IdentityKeyPair(this._publicKey, this._privateKey);
IdentityKeyPair.fromSerialized(Uint8List serialized) {
final structure = IdentityKeyPairStructure.fromBuffer(serialized);
_publicKey =
IdentityKey.fromBytes(Uint8List.fromList(structure.publicKey), 0);
_privateKey =
Curve.decodePrivatePoint(Uint8List.fromList(structure.privateKey));
}
late IdentityKey _publicKey;
late ECPrivateKey _privateKey;
IdentityKey getPublicKey() => _publicKey;
ECPrivateKey getPrivateKey() => _privateKey;
Uint8List serialize() {
final i = IdentityKeyPairStructure.create()
..publicKey = List.from(_publicKey.serialize())
..privateKey = List.from(_privateKey.serialize());
return i.toBuilder().writeToBuffer();
}
}

7
libsignal_protocol_dart/lib/src/invalid_key_exception.dart
View file

@ -1,7 +0,0 @@
class InvalidKeyException implements Exception {
InvalidKeyException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'InvalidKeyException - $detailMessage';
}

7
libsignal_protocol_dart/lib/src/invalid_key_id_exception.dart
View file

@ -1,7 +0,0 @@
class InvalidKeyIdException implements Exception {
InvalidKeyIdException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'InvalidKeyIdException - $detailMessage';
}

7
libsignal_protocol_dart/lib/src/invalid_mac_exception.dart
View file

@ -1,7 +0,0 @@
class InvalidMacException implements Exception {
InvalidMacException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'InvalidMacException - $detailMessage';
}

7
libsignal_protocol_dart/lib/src/invalid_message_exception.dart
View file

@ -1,7 +0,0 @@
class InvalidMessageException implements Exception {
InvalidMessageException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'InvalidMessageException - $detailMessage';
}

29
libsignal_protocol_dart/lib/src/kdf/derived_message_secrets.dart
View file

@ -1,29 +0,0 @@
import 'dart:typed_data';
import '../util/byte_util.dart';
class DerivedMessageSecrets {
DerivedMessageSecrets(Uint8List okm) {
final keys =
ByteUtil.split(okm, _cipherKeyLength, _macKeyLength, _ivLength);
_cipherKey = keys[0];
_macKey = keys[1];
_iv = keys[2];
}
static const int size = 80;
static const int _cipherKeyLength = 32;
static const int _macKeyLength = 32;
static const int _ivLength = 16;
late Uint8List _cipherKey;
late Uint8List _macKey;
late Uint8List _iv;
Uint8List getCipherKey() => _cipherKey;
Uint8List getMacKey() => _macKey;
Uint8List getIv() => _iv;
}

20
libsignal_protocol_dart/lib/src/kdf/derived_root_secrets.dart
View file

@ -1,20 +0,0 @@
import 'dart:typed_data';
import '../util/byte_util.dart';
class DerivedRootSecrets {
DerivedRootSecrets(Uint8List okm) {
final keys = ByteUtil.splitTwo(okm, 32, 32);
_rootKey = keys[0];
_chainKey = keys[1];
}
static const int size = 64;
late Uint8List _rootKey;
late Uint8List _chainKey;
Uint8List getRootKey() => _rootKey;
Uint8List getChainKey() => _chainKey;
}

81
libsignal_protocol_dart/lib/src/kdf/hkdf.dart
View file

@ -1,81 +0,0 @@
import 'dart:math';
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart';
import '../invalid_key_exception.dart';
import 'hkdfv2.dart';
import 'hkdfv3.dart';
abstract class HKDF {
static const int hashOutputSize = 32;
static HKDF createFor(int messageVersion) {
switch (messageVersion) {
case 2:
return HKDFv2();
case 3:
return HKDFv3();
default:
throw AssertionError('Unknown version: $messageVersion');
}
}
Uint8List deriveSecrets(
Uint8List inputKeyMaterial, Uint8List info, int outputLength) {
final salt = Uint8List(hashOutputSize);
return deriveSecrets4(inputKeyMaterial, salt, info, outputLength);
}
Uint8List deriveSecrets4(Uint8List inputKeyMaterial, Uint8List salt,
Uint8List info, int outputLength) {
final prk = extract(salt, inputKeyMaterial);
return expand(prk, info, outputLength);
}
Uint8List extract(Uint8List salt, Uint8List inputKeyMaterial) {
final hmacSha256 = Hmac(sha256, salt);
final digest = hmacSha256.convert(inputKeyMaterial);
return Uint8List.fromList(digest.bytes);
}
Uint8List expand(Uint8List prk, Uint8List? info, int outputSize) {
try {
final iterations =
(outputSize.toDouble() / hashOutputSize.toDouble()).ceil();
var mix = Uint8List(0);
final results = Uint8List(outputSize);
var remainingBytes = outputSize;
for (var i = getIterationStartOffset();
i < iterations + getIterationStartOffset();
i++) {
final mac = Hmac(sha256, prk);
final output = AccumulatorSink<Digest>();
final input = mac.startChunkedConversion(output)..add(mix);
if (info != null) {
input.add(info);
}
input
..add([i])
..close();
final stepResult = Uint8List.fromList(output.events.single.bytes);
final stepSize = min(remainingBytes, stepResult.length);
for (var j = 0; j < stepSize; j++) {
final offset = (i - getIterationStartOffset()) * hashOutputSize + j;
results[offset] = stepResult[j];
}
mix = stepResult;
remainingBytes -= stepSize;
}
return results.buffer.asUint8List();
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
int getIterationStartOffset();
}

6
libsignal_protocol_dart/lib/src/kdf/hkdfv2.dart
View file

@ -1,6 +0,0 @@
import 'hkdf.dart';
class HKDFv2 extends HKDF {
@override
int getIterationStartOffset() => 0;
}

6
libsignal_protocol_dart/lib/src/kdf/hkdfv3.dart
View file

@ -1,6 +0,0 @@
import 'hkdf.dart';
class HKDFv3 extends HKDF {
@override
int getIterationStartOffset() => 1;
}

7
libsignal_protocol_dart/lib/src/legacy_message_exception.dart
View file

@ -1,7 +0,0 @@
class LegacyMessageException implements Exception {
LegacyMessageException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'LegacyMessageException - $detailMessage';
}

7
libsignal_protocol_dart/lib/src/no_session_exception.dart
View file

@ -1,7 +0,0 @@
class NoSessionException implements Exception {
NoSessionException(this.detailMessage);
final String detailMessage;
@override
String toString() => 'NoSessionException - $detailMessage';
}

16
libsignal_protocol_dart/lib/src/protocol/ciphertext_message.dart
View file

@ -1,16 +0,0 @@
import 'dart:typed_data';
abstract class CiphertextMessage {
static const int currentVersion = 3;
static const int whisperType = 2;
static const int prekeyType = 3;
static const int senderKeyType = 4;
static const int senderKeyDistributionType = 5;
// This should be the worst case (worse than V2). So not always accurate, but good enough for padding.
static const int encryptedMessageOverhead = 53;
Uint8List serialize();
int getType();
}

71
libsignal_protocol_dart/lib/src/protocol/device_consistency_message.dart
View file

@ -1,71 +0,0 @@
import 'dart:typed_data';
import 'package:protobuf/protobuf.dart';
import '../devices/device_consistency_commitment.dart';
import '../devices/device_consistency_signature.dart';
import '../ecc/curve.dart';
import '../identity_key.dart';
import '../identity_key_pair.dart';
import '../invalid_key_exception.dart';
import '../invalid_message_exception.dart';
import '../state/whisper_text_protocol.pb.dart';
class DeviceConsistencyMessage {
DeviceConsistencyMessage(
DeviceConsistencyCommitment commitment, IdentityKeyPair identityKeyPair) {
try {
final signatureBytes = Curve.calculateVrfSignature(
identityKeyPair.getPrivateKey(), commitment.serialized);
final vrfOutputBytes = Curve.verifyVrfSignature(
identityKeyPair.getPublicKey().publicKey,
commitment.serialized,
signatureBytes);
_generation = commitment.generation;
_signature = DeviceConsistencySignature(signatureBytes, vrfOutputBytes);
final d = DeviceConsistencyCodeMessage.create()
..generation = commitment.generation
..signature = _signature.signature.toList();
_serialized = d.writeToBuffer();
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
// } on VrfSignatureVerificationFailedException catch (e) {
// throw AssertionError(e);
// }
}
DeviceConsistencyMessage.fromSerialized(
DeviceConsistencyCommitment commitment,
Uint8List serialized,
IdentityKey identityKey) {
try {
final message = DeviceConsistencyCodeMessage.fromBuffer(serialized);
final vrfOutputBytes = Curve.verifyVrfSignature(identityKey.publicKey,
commitment.serialized, Uint8List.fromList(message.signature));
_generation = message.generation;
_signature = DeviceConsistencySignature(
Uint8List.fromList(message.signature), vrfOutputBytes);
_serialized = serialized;
} on InvalidProtocolBufferException catch (e) {
throw InvalidMessageException(e.message);
} on InvalidKeyException catch (e) {
throw InvalidMessageException(e.detailMessage);
}
// } on VrfSignatureVerificationFailedException catch (e) {
// throw AssertionError(e);
// }
}
late DeviceConsistencySignature _signature;
late int _generation;
late Uint8List _serialized;
Uint8List get serialized => _serialized;
DeviceConsistencySignature get signature => _signature;
int get generation => _generation;
}

101
libsignal_protocol_dart/lib/src/protocol/pre_key_signal_message.dart
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@ -1,101 +0,0 @@
import 'dart:typed_data';
import 'package:optional/optional.dart';
import '../ecc/curve.dart';
import '../ecc/ec_public_key.dart';
import '../identity_key.dart';
import '../invalid_key_exception.dart';
import '../invalid_message_exception.dart';
import '../legacy_message_exception.dart';
import '../protocol/ciphertext_message.dart';
import '../protocol/signal_message.dart';
import '../state/whisper_text_protocol.pb.dart' as signal_protos;
import '../util/byte_util.dart';
class PreKeySignalMessage extends CiphertextMessage {
PreKeySignalMessage(Uint8List serialized) {
try {
_version = ByteUtil.highBitsToInt(serialized[0]);
final preKeyWhisperMessage =
signal_protos.PreKeySignalMessage.fromBuffer(serialized.sublist(1));
if (!preKeyWhisperMessage.hasSignedPreKeyId() ||
!preKeyWhisperMessage.hasBaseKey() ||
!preKeyWhisperMessage.hasIdentityKey() ||
!preKeyWhisperMessage.hasMessage()) {
throw InvalidMessageException('Incomplete message.');
}
this.serialized = serialized;
registrationId = preKeyWhisperMessage.registrationId;
preKeyId = preKeyWhisperMessage.hasPreKeyId()
? Optional.of(preKeyWhisperMessage.preKeyId)
: const Optional.empty();
signedPreKeyId = preKeyWhisperMessage.hasSignedPreKeyId()
? preKeyWhisperMessage.signedPreKeyId
: -1;
baseKey = Curve.decodePoint(
Uint8List.fromList(preKeyWhisperMessage.baseKey), 0);
identityKey = IdentityKey(Curve.decodePoint(
Uint8List.fromList(preKeyWhisperMessage.identityKey), 0));
message = SignalMessage.fromSerialized(
Uint8List.fromList(preKeyWhisperMessage.message));
} on InvalidKeyException catch (e) {
throw InvalidMessageException(e.detailMessage);
} on LegacyMessageException catch (e) {
throw InvalidMessageException(e.detailMessage);
}
}
PreKeySignalMessage.from(this._version, this.registrationId, this.preKeyId,
this.signedPreKeyId, this.baseKey, this.identityKey, this.message) {
final builder = signal_protos.PreKeySignalMessage.create()
..signedPreKeyId = signedPreKeyId
..baseKey = baseKey.serialize()
..identityKey = identityKey.serialize()
..message = message.serialize()
..registrationId = registrationId;
if (preKeyId.isPresent) {
builder.preKeyId = preKeyId.value;
}
final versionBytes = [
ByteUtil.intsToByteHighAndLow(_version, CiphertextMessage.currentVersion)
];
final messageBytes = builder.toBuilder().writeToBuffer();
serialized = Uint8List.fromList(versionBytes + messageBytes);
}
late int _version;
late int registrationId;
late Optional<int> preKeyId;
late int signedPreKeyId;
late ECPublicKey baseKey;
late IdentityKey identityKey;
late SignalMessage message;
late Uint8List serialized;
int getMessageVersion() => _version;
IdentityKey getIdentityKey() => identityKey;
int getRegistrationId() => registrationId;
Optional<int> getPreKeyId() => preKeyId;
int getSignedPreKeyId() => signedPreKeyId;
ECPublicKey getBaseKey() => baseKey;
SignalMessage getWhisperMessage() => message;
@override
int getType() => CiphertextMessage.prekeyType;
@override
Uint8List serialize() => serialized;
}

87
libsignal_protocol_dart/lib/src/protocol/sender_key_distribution_message_wrapper.dart
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@ -1,87 +0,0 @@
import 'dart:typed_data';
import 'package:protobuf/protobuf.dart';
import '../ecc/curve.dart';
import '../ecc/ec_public_key.dart';
import '../invalid_key_exception.dart';
import '../invalid_message_exception.dart';
import '../legacy_message_exception.dart';
import '../state/whisper_text_protocol.pb.dart';
import '../util/byte_util.dart';
import 'ciphertext_message.dart';
class SenderKeyDistributionMessageWrapper extends CiphertextMessage {
SenderKeyDistributionMessageWrapper(
int id, int iteration, Uint8List chainKey, ECPublicKey signatureKey) {
final version = Uint8List.fromList([
ByteUtil.intsToByteHighAndLow(
CiphertextMessage.currentVersion, CiphertextMessage.currentVersion)
]);
final protobuf = SenderKeyDistributionMessage.create()
..id = id
..iteration = iteration
..chainKey = List.from(chainKey)
..signingKey = List.from(signatureKey.serialize());
_id = id;
_iteration = iteration;
_chainKey = chainKey;
_signatureKey = signatureKey;
_serialized = ByteUtil.combine([version, protobuf.writeToBuffer()]);
}
SenderKeyDistributionMessageWrapper.fromSerialized(Uint8List serialized) {
try {
final messageParts =
ByteUtil.splitTwo(serialized, 1, serialized.length - 1);
final version = messageParts[0][0];
final message = messageParts[1];
if (ByteUtil.highBitsToInt(version) < CiphertextMessage.currentVersion) {
throw LegacyMessageException(
'Legacy message: ${ByteUtil.highBitsToInt(version)}');
}
if (ByteUtil.highBitsToInt(version) > CiphertextMessage.currentVersion) {
throw InvalidMessageException(
'Unknown version: ${ByteUtil.highBitsToInt(version)}');
}
final distributionMessages =
SenderKeyDistributionMessage.fromBuffer(message);
if (!distributionMessages.hasId() ||
!distributionMessages.hasIteration() ||
!distributionMessages.hasChainKey() ||
!distributionMessages.hasSigningKey()) {
throw InvalidMessageException('Incomplete message.');
}
_serialized = serialized;
_id = distributionMessages.id;
_iteration = distributionMessages.iteration;
_chainKey = Uint8List.fromList(distributionMessages.chainKey);
_signatureKey = Curve.decodePoint(
Uint8List.fromList(distributionMessages.signingKey), 0);
} on InvalidProtocolBufferException catch (e) {
throw InvalidMessageException(e.message);
} on InvalidKeyException catch (e) {
throw InvalidMessageException(e.detailMessage);
}
}
late int _id;
late int _iteration;
late Uint8List _chainKey;
late ECPublicKey _signatureKey;
late Uint8List _serialized;
@override
int getType() => CiphertextMessage.senderKeyDistributionType;
@override
Uint8List serialize() => _serialized;
int get iteration => _iteration;
Uint8List get chainKey => _chainKey;
ECPublicKey get signatureKey => _signatureKey;
int get id => _id;
}

108
libsignal_protocol_dart/lib/src/protocol/sender_key_message.dart
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@ -1,108 +0,0 @@
import 'dart:typed_data';
import '../ecc/curve.dart';
import '../ecc/ec_private_key.dart';
import '../ecc/ec_public_key.dart';
import '../invalid_key_exception.dart';
import '../invalid_key_id_exception.dart';
import '../invalid_message_exception.dart';
import '../legacy_message_exception.dart';
import '../state/whisper_text_protocol.pb.dart' as protocol;
import '../util/byte_util.dart';
import 'ciphertext_message.dart';
class SenderKeyMessage extends CiphertextMessage {
SenderKeyMessage(int keyId, int iteration, Uint8List ciphertext,
ECPrivateKey signatureKey) {
final version = Uint8List.fromList([
ByteUtil.intsToByteHighAndLow(
CiphertextMessage.currentVersion, CiphertextMessage.currentVersion)
]);
final message = protocol.SenderKeyMessage.create()
..id = keyId
..iteration = iteration
..ciphertext = ciphertext;
final messageList = message.writeToBuffer();
final signature =
_getSignature(signatureKey, ByteUtil.combine([version, messageList]));
_serialized = ByteUtil.combine([version, messageList, signature]);
_messageVersion = CiphertextMessage.currentVersion;
_keyId = keyId;
_iteration = iteration;
_ciphertext = ciphertext;
}
SenderKeyMessage.fromSerialized(Uint8List serialized) {
final messageParts = ByteUtil.split(serialized, 1,
serialized.length - 1 - signatureLength, signatureLength);
final version = messageParts[0][0];
final message = messageParts[1];
// ignore: unused_local_variable
final signature = messageParts[2];
if (ByteUtil.highBitsToInt(version) < 3) {
throw LegacyMessageException(
'Legacy message: ${ByteUtil.highBitsToInt(version)}');
}
if (ByteUtil.highBitsToInt(version) > CiphertextMessage.currentVersion) {
throw InvalidMessageException(
'Unknown version: ${ByteUtil.highBitsToInt(version)}');
}
final senderKeyMessage = protocol.SenderKeyMessage.fromBuffer(message);
if (!senderKeyMessage.hasId() ||
!senderKeyMessage.hasIteration() ||
!senderKeyMessage.hasCiphertext()) {
throw InvalidMessageException('Incomplete message.');
}
_serialized = serialized;
_messageVersion = ByteUtil.highBitsToInt(version);
_keyId = senderKeyMessage.id;
_iteration = senderKeyMessage.iteration;
_ciphertext = Uint8List.fromList(senderKeyMessage.ciphertext);
}
static const int signatureLength = 64;
// ignore: unused_field
late int _messageVersion;
late int _keyId;
late int _iteration;
late Uint8List _ciphertext;
late Uint8List _serialized;
Uint8List _getSignature(ECPrivateKey signatureKey, Uint8List serialized) {
try {
return Curve.calculateSignature(signatureKey, serialized);
} on InvalidKeyIdException catch (e) {
throw AssertionError(e);
}
}
int get keyId => _keyId;
int get iteration => _iteration;
Uint8List get ciphertext => _ciphertext;
void verifySignature(ECPublicKey signatureKey) {
try {
final parts = ByteUtil.splitTwo(
_serialized, _serialized.length - signatureLength, signatureLength);
if (!Curve.verifySignature(signatureKey, parts[0], parts[1])) {
throw InvalidMessageException('Invalid signature!');
}
} on InvalidKeyException catch (e) {
throw InvalidMessageException(e.detailMessage);
}
}
@override
int getType() => CiphertextMessage.senderKeyType;
@override
Uint8List serialize() => _serialized;
}

141
libsignal_protocol_dart/lib/src/protocol/signal_message.dart
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@ -1,141 +0,0 @@
import 'dart:typed_data';
import 'package:convert/convert.dart';
import 'package:crypto/crypto.dart';
import 'package:protobuf/protobuf.dart';
import '../ecc/curve.dart';
import '../ecc/ec_public_key.dart';
import '../identity_key.dart';
import '../invalid_key_exception.dart';
import '../invalid_message_exception.dart';
import '../legacy_message_exception.dart';
import '../protocol/ciphertext_message.dart';
import '../state/whisper_text_protocol.pb.dart' as signal_protos;
import '../util/byte_util.dart';
class SignalMessage extends CiphertextMessage {
SignalMessage(
int messageVersion,
Uint8List macKey,
ECPublicKey senderRatchetKey,
int counter,
int previousCounter,
Uint8List ciphertext,
IdentityKey senderIdentityKey,
IdentityKey? receiverIdentityKey) {
final version = Uint8List.fromList([
ByteUtil.intsToByteHighAndLow(
messageVersion, CiphertextMessage.currentVersion)
]);
final m = signal_protos.SignalMessage.create()
..ratchetKey = senderRatchetKey.serialize()
..counter = counter
..previousCounter = previousCounter
..ciphertext = ciphertext;
final message = m.writeToBuffer();
final mac = _getMac(senderIdentityKey, receiverIdentityKey!, macKey,
ByteUtil.combine([version, message]));
_serialized = ByteUtil.combine([version, message, mac]);
_senderRatchetKey = senderRatchetKey;
_counter = counter;
_previousCounter = previousCounter;
_ciphertext = ciphertext;
_messageVersion = messageVersion;
}
SignalMessage.fromSerialized(Uint8List serialized) {
try {
final messageParts = ByteUtil.split(
serialized, 1, serialized.length - 1 - macLength, macLength);
final version = messageParts[0].first;
final message = messageParts[1];
// ignore: unused_local_variable
final mac = messageParts[2];
if (ByteUtil.highBitsToInt(version) < CiphertextMessage.currentVersion) {
throw LegacyMessageException(
'Legacy message: $ByteUtil.highBitsToInt(version)');
}
if (ByteUtil.highBitsToInt(version) > CiphertextMessage.currentVersion) {
throw InvalidMessageException(
'Unknown version: $ByteUtil.highBitsToInt(version)');
}
final whisperMessage = signal_protos.SignalMessage.fromBuffer(message);
if (!whisperMessage.hasCiphertext() ||
!whisperMessage.hasCounter() ||
!whisperMessage.hasRatchetKey()) {
throw InvalidMessageException('Incomplete message.');
}
_serialized = serialized;
_senderRatchetKey =
Curve.decodePoint(Uint8List.fromList(whisperMessage.ratchetKey), 0);
_messageVersion = ByteUtil.highBitsToInt(version);
_counter = whisperMessage.counter;
_previousCounter = whisperMessage.previousCounter;
_ciphertext = Uint8List.fromList(whisperMessage.ciphertext);
} on InvalidProtocolBufferException catch (e) {
throw InvalidMessageException(e.toString());
} on InvalidKeyException catch (e) {
throw InvalidMessageException(e.detailMessage);
}
}
static const int macLength = 8;
late int _messageVersion;
late ECPublicKey _senderRatchetKey;
late int _counter;
// ignore: unused_field
late int _previousCounter;
late Uint8List _ciphertext;
late Uint8List _serialized;
ECPublicKey getSenderRatchetKey() => _senderRatchetKey;
int getMessageVersion() => _messageVersion;
int getCounter() => _counter;
Uint8List getBody() => _ciphertext;
void verifyMac(IdentityKey senderIdentityKey, IdentityKey receiverIdentityKey,
Uint8List macKey) {
final parts = ByteUtil.splitTwo(
_serialized, _serialized.length - macLength, macLength);
final ourMac =
_getMac(senderIdentityKey, receiverIdentityKey, macKey, parts[0]);
final theirMac = parts[1];
if (Digest(ourMac) != Digest(theirMac)) {
throw InvalidMessageException('Bad Mac!');
}
}
Uint8List _getMac(IdentityKey senderIdentityKey,
IdentityKey receiverIdentityKey, Uint8List macKey, Uint8List serialized) {
final mac = Hmac(sha256, macKey); // HMAC-SHA256
final output = AccumulatorSink<Digest>();
mac.startChunkedConversion(output)
..add(senderIdentityKey.publicKey.serialize())
..add(receiverIdentityKey.publicKey.serialize())
..add(serialized)
..close();
final fullMac = Uint8List.fromList(output.events.single.bytes);
return ByteUtil.trim(fullMac, macLength);
}
@override
int getType() => CiphertextMessage.whisperType;
@override
Uint8List serialize() => _serialized;
}

109
libsignal_protocol_dart/lib/src/provisioning_cipher.dart
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@ -1,109 +0,0 @@
import 'dart:convert';
import 'dart:typed_data';
import 'package:crypto/crypto.dart';
import 'cbc.dart';
import 'ecc/curve.dart';
import 'ecc/ec_public_key.dart';
import 'eq.dart';
import 'invalid_mac_exception.dart';
import 'kdf/derived_root_secrets.dart';
import 'kdf/hkdfv3.dart';
import 'legacy_message_exception.dart';
import 'util/byte_util.dart';
const String provision = 'Mixin Provisioning Message';
class ProvisionEnvelope {
ProvisionEnvelope(this.publicKey, this.body);
ProvisionEnvelope.fromJson(Map<String, dynamic> json)
: publicKey = base64Decode(json['public_key'] as String),
body = base64Decode(json['body'] as String);
final Uint8List publicKey;
final Uint8List body;
Map<String, dynamic> toJson() => <String, dynamic>{
'public_key': base64Encode(publicKey),
'body': base64Encode(body),
};
}
Uint8List decrypt(String privateKey, String content) {
final ourPrivateKey = base64Decode(privateKey);
final envelopeDecode = base64Decode(content);
final map = jsonDecode(String.fromCharCodes(envelopeDecode));
final provisionEnvelope =
ProvisionEnvelope.fromJson(map as Map<String, dynamic>);
final publicKeyable = Curve.decodePoint(provisionEnvelope.publicKey, 0);
final message = provisionEnvelope.body;
if (message[0] != 1) {
throw LegacyMessageException('Invalid version');
}
final iv = Uint8List.fromList(message.getRange(1, 16 + 1).toList());
final mac = message.getRange(message.length - 32, message.length).toList();
final ivAndCiphertext =
Uint8List.fromList(message.getRange(0, message.length - 32).toList());
final cipherText = Uint8List.fromList(
message.getRange(16 + 1, message.length - 32).toList());
final sharedSecret = Curve.calculateAgreement(
publicKeyable, Curve.decodePrivatePoint(ourPrivateKey));
final derivedSecretBytes = HKDFv3().deriveSecrets(sharedSecret,
Uint8List.fromList(utf8.encode(provision)), DerivedRootSecrets.size);
final aesKey =
Uint8List.fromList(derivedSecretBytes.getRange(0, 32).toList());
final macKey = Uint8List.fromList(
derivedSecretBytes.getRange(32, derivedSecretBytes.length).toList());
if (!verifyMAC(macKey, ivAndCiphertext, mac)) {
throw InvalidMacException("MAC doesn't match!");
}
final plaintext = aesCbcDecrypt(aesKey, iv, cipherText);
return plaintext;
}
bool verifyMAC(Uint8List key, Uint8List input, List<int> mac) {
final hmacSha256 = Hmac(sha256, key);
final digest = hmacSha256.convert(input);
return eq(digest.bytes, mac);
}
class ProvisioningCipher {
ProvisioningCipher(this._theirPublicKey);
final ECPublicKey _theirPublicKey;
Uint8List encrypt(Uint8List message) {
final ourKeyPair = Curve.generateKeyPair();
final sharedSecret =
Curve.calculateAgreement(_theirPublicKey, ourKeyPair.privateKey);
final derivedSecret = HKDFv3().deriveSecrets(
sharedSecret, Uint8List.fromList(utf8.encode(provision)), 64);
final parts = ByteUtil.splitTwo(derivedSecret, 32, 32);
final version = Uint8List.fromList([1]);
final ciphertext = getCiphertext(parts[0], message);
final mac = _getMac(parts[1], ByteUtil.combine([version, ciphertext]));
final body = ByteUtil.combine([version, ciphertext, mac]);
final envelope = ProvisionEnvelope(ourKeyPair.publicKey.serialize(), body);
final result = jsonEncode(envelope);
return Uint8List.fromList(utf8.encode(result));
}
Uint8List getCiphertext(Uint8List key, Uint8List message) {
final iv = Uint8List(16);
final m = aesCbcEncrypt(key, iv, message);
return Uint8List.fromList(iv + m);
}
Uint8List _getMac(Uint8List key, Uint8List message) {
final hmacSha256 = Hmac(sha256, key);
final digest = hmacSha256.convert(message);
return Uint8List.fromList(digest.bytes);
}
}

25
libsignal_protocol_dart/lib/src/ratchet/alice_signal_protocol_parameters.dart
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@ -1,25 +0,0 @@
import 'package:optional/optional.dart';
import '../ecc/ec_key_pair.dart';
import '../ecc/ec_public_key.dart';
import '../identity_key.dart';
import '../identity_key_pair.dart';
class AliceSignalProtocolParameters {
AliceSignalProtocolParameters({
required this.ourIdentityKey,
required this.ourBaseKey,
required this.theirIdentityKey,
required this.theirSignedPreKey,
required this.theirRatchetKey,
required this.theirOneTimePreKey,
});
final IdentityKeyPair ourIdentityKey;
final ECKeyPair ourBaseKey;
final IdentityKey theirIdentityKey;
final ECPublicKey theirSignedPreKey;
final Optional<ECPublicKey> theirOneTimePreKey;
final ECPublicKey theirRatchetKey;
}

37
libsignal_protocol_dart/lib/src/ratchet/bob_signal_protocol_parameters.dart
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@ -1,37 +0,0 @@
import 'package:optional/optional.dart';
import '../ecc/ec_key_pair.dart';
import '../ecc/ec_public_key.dart';
import '../identity_key.dart';
import '../identity_key_pair.dart';
class BobSignalProtocolParameters {
BobSignalProtocolParameters({
required this.ourIdentityKey,
required this.ourSignedPreKey,
required this.ourRatchetKey,
required this.ourOneTimePreKey,
required this.theirIdentityKey,
required this.theirBaseKey,
});
final IdentityKeyPair ourIdentityKey;
final ECKeyPair ourSignedPreKey;
final Optional<ECKeyPair> ourOneTimePreKey;
final ECKeyPair ourRatchetKey;
final IdentityKey theirIdentityKey;
final ECPublicKey theirBaseKey;
IdentityKeyPair getOurIdentityKey() => ourIdentityKey;
ECKeyPair getOurSignedPreKey() => ourSignedPreKey;
Optional<ECKeyPair> getOurOneTimePreKey() => ourOneTimePreKey;
IdentityKey getTheirIdentityKey() => theirIdentityKey;
ECPublicKey getTheirBaseKey() => theirBaseKey;
ECKeyPair getOurRatchetKey() => ourRatchetKey;
}

46
libsignal_protocol_dart/lib/src/ratchet/chain_key.dart
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@ -1,46 +0,0 @@
import 'dart:convert';
import 'dart:core';
import 'dart:typed_data';
import 'package:crypto/crypto.dart';
import '../kdf/derived_message_secrets.dart';
import '../kdf/hkdf.dart';
import '../ratchet/message_keys.dart';
class ChainKey {
ChainKey(this._kdf, this._key, this._index);
static final Uint8List messageKeySeed = Uint8List.fromList([0x01]);
static final Uint8List chainKeySeed = Uint8List.fromList([0x02]);
final HKDF _kdf;
final Uint8List _key;
final int _index;
Uint8List get key => _key;
int get index => _index;
ChainKey getNextChainKey() {
final nextKey = _getBaseMaterial(chainKeySeed);
return ChainKey(_kdf, nextKey, _index + 1);
}
MessageKeys getMessageKeys() {
final bytes = Uint8List.fromList(utf8.encode('WhisperMessageKeys'));
final inputKeyMaterial = _getBaseMaterial(messageKeySeed);
final keyMaterialBytes =
_kdf.deriveSecrets(inputKeyMaterial, bytes, DerivedMessageSecrets.size);
final keyMaterial = DerivedMessageSecrets(keyMaterialBytes);
return MessageKeys(keyMaterial.getCipherKey(), keyMaterial.getMacKey(),
keyMaterial.getIv(), _index);
}
Uint8List _getBaseMaterial(Uint8List seed) {
final hmacSha256 = Hmac(sha256, _key);
final digest = hmacSha256.convert(seed);
return Uint8List.fromList(digest.bytes);
}
}

18
libsignal_protocol_dart/lib/src/ratchet/message_keys.dart
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@ -1,18 +0,0 @@
import 'dart:typed_data';
class MessageKeys {
MessageKeys(this.cipherKey, this.macKey, this.iv, this.counter);
final Uint8List cipherKey;
final Uint8List macKey;
final Uint8List iv;
final int counter;
Uint8List getCipherKey() => cipherKey;
Uint8List getMacKey() => macKey;
Uint8List getIv() => iv;
int getCounter() => counter;
}

151
libsignal_protocol_dart/lib/src/ratchet/ratcheting_session.dart
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@ -1,151 +0,0 @@
import 'dart:convert';
import 'dart:typed_data';
import 'package:optional/optional.dart';
import '../ecc/curve.dart';
import '../ecc/ec_key_pair.dart';
import '../ecc/ec_public_key.dart';
import '../kdf/hkdf.dart';
import '../kdf/hkdfv3.dart';
import '../protocol/ciphertext_message.dart';
import '../ratchet/alice_signal_protocol_parameters.dart';
import '../ratchet/bob_signal_protocol_parameters.dart';
import '../ratchet/chain_key.dart';
import '../ratchet/root_key.dart';
import '../ratchet/symmetric_signal_protocol_parameters.dart';
import '../state/session_state.dart';
import '../util/byte_util.dart';
class RatchetingSession {
static void initializeSession(
SessionState sessionState, SymmetricSignalProtocolParameters parameters) {
if (isAlice(parameters.ourBaseKey.publicKey, parameters.theirBaseKey)) {
final aliceParameters = AliceSignalProtocolParameters(
ourBaseKey: parameters.ourBaseKey,
ourIdentityKey: parameters.ourIdentityKey,
theirRatchetKey: parameters.theirRatchetKey,
theirIdentityKey: parameters.theirIdentityKey,
theirSignedPreKey: parameters.theirBaseKey,
theirOneTimePreKey: const Optional<ECPublicKey>.empty(),
);
RatchetingSession.initializeSessionAlice(sessionState, aliceParameters);
} else {
final bobParameters = BobSignalProtocolParameters(
ourIdentityKey: parameters.ourIdentityKey,
ourRatchetKey: parameters.ourRatchetKey,
ourSignedPreKey: parameters.ourBaseKey,
ourOneTimePreKey: const Optional<ECKeyPair>.empty(),
theirBaseKey: parameters.theirBaseKey,
theirIdentityKey: parameters.theirIdentityKey,
);
RatchetingSession.initializeSessionBob(sessionState, bobParameters);
}
}
static void initializeSessionAlice(
SessionState sessionState, AliceSignalProtocolParameters parameters) {
try {
sessionState
..sessionVersion = CiphertextMessage.currentVersion
..remoteIdentityKey = parameters.theirIdentityKey
..localIdentityKey = parameters.ourIdentityKey.getPublicKey();
final sendingRatchetKey = Curve.generateKeyPair();
final secrets = <int>[
...getDiscontinuityBytes(),
...Curve.calculateAgreement(parameters.theirSignedPreKey,
parameters.ourIdentityKey.getPrivateKey()),
...Curve.calculateAgreement(parameters.theirIdentityKey.publicKey,
parameters.ourBaseKey.privateKey),
...Curve.calculateAgreement(
parameters.theirSignedPreKey, parameters.ourBaseKey.privateKey)
];
if (parameters.theirOneTimePreKey.isPresent) {
secrets.addAll(Curve.calculateAgreement(
parameters.theirOneTimePreKey.value,
parameters.ourBaseKey.privateKey));
}
final derivedKeys = calculateDerivedKeys(Uint8List.fromList(secrets));
final sendingChain = derivedKeys
.getRootKey()
.createChain(parameters.theirRatchetKey, sendingRatchetKey);
sessionState
..addReceiverChain(
parameters.theirRatchetKey, derivedKeys.getChainKey())
..setSenderChain(sendingRatchetKey, sendingChain.$2)
..rootKey = sendingChain.$1;
} on Exception catch (e) {
throw AssertionError(e);
}
}
static void initializeSessionBob(
SessionState sessionState, BobSignalProtocolParameters parameters) {
try {
sessionState
..sessionVersion = CiphertextMessage.currentVersion
..remoteIdentityKey = parameters.theirIdentityKey
..localIdentityKey = parameters.ourIdentityKey.getPublicKey();
final secrets = <int>[
...getDiscontinuityBytes(),
...Curve.calculateAgreement(parameters.theirIdentityKey.publicKey,
parameters.ourSignedPreKey.privateKey),
...Curve.calculateAgreement(
parameters.theirBaseKey, parameters.ourIdentityKey.getPrivateKey()),
...Curve.calculateAgreement(
parameters.theirBaseKey, parameters.ourSignedPreKey.privateKey)
];
if (parameters.ourOneTimePreKey.isPresent) {
secrets.addAll(Curve.calculateAgreement(parameters.theirBaseKey,
parameters.ourOneTimePreKey.value.privateKey));
}
final derivedKeys = calculateDerivedKeys(Uint8List.fromList(secrets));
sessionState
..setSenderChain(parameters.ourRatchetKey, derivedKeys.getChainKey())
..rootKey = derivedKeys.getRootKey();
} on Exception catch (e) {
throw AssertionError(e);
}
}
static Uint8List getDiscontinuityBytes() {
final discontinuity = Uint8List(32);
final len = discontinuity.length;
for (var i = 0; i < len; i++) {
discontinuity[i] = 0xFF;
}
return discontinuity;
}
static DerivedKeys calculateDerivedKeys(Uint8List masterSecret) {
final HKDF kdf = HKDFv3();
final bytes = Uint8List.fromList(utf8.encode('WhisperText'));
final derivedSecretBytes = kdf.deriveSecrets(masterSecret, bytes, 64);
final derivedSecrets = ByteUtil.splitTwo(derivedSecretBytes, 32, 32);
return DerivedKeys(
RootKey(kdf, derivedSecrets[0]), ChainKey(kdf, derivedSecrets[1], 0));
}
static bool isAlice(ECPublicKey ourKey, ECPublicKey theirKey) =>
ourKey.compareTo(theirKey) < 0;
}
class DerivedKeys {
DerivedKeys(this._rootKey, this._chainKey);
final RootKey _rootKey;
final ChainKey _chainKey;
RootKey getRootKey() => _rootKey;
ChainKey getChainKey() => _chainKey;
}

33
libsignal_protocol_dart/lib/src/ratchet/root_key.dart
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@ -1,33 +0,0 @@
import 'dart:convert';
import 'dart:typed_data';
import '../ecc/curve.dart';
import '../ecc/ec_key_pair.dart';
import '../ecc/ec_public_key.dart';
import '../kdf/derived_root_secrets.dart';
import '../kdf/hkdf.dart';
import '../ratchet/chain_key.dart';
class RootKey {
RootKey(this._kdf, this._key);
final HKDF _kdf;
final Uint8List _key;
Uint8List getKeyBytes() => _key;
(RootKey, ChainKey) createChain(
ECPublicKey theirRatchetKey, ECKeyPair ourRatchetKey) {
final sharedSecret =
Curve.calculateAgreement(theirRatchetKey, ourRatchetKey.privateKey);
final bytes = Uint8List.fromList(utf8.encode('WhisperRatchet'));
final derivedSecretBytes =
_kdf.deriveSecrets4(sharedSecret, _key, bytes, DerivedRootSecrets.size);
final derivedSecrets = DerivedRootSecrets(derivedSecretBytes);
final newRootKey = RootKey(_kdf, derivedSecrets.getRootKey());
final newChainKey = ChainKey(_kdf, derivedSecrets.getChainKey(), 0);
return (newRootKey, newChainKey);
}
}

23
libsignal_protocol_dart/lib/src/ratchet/symmetric_signal_protocol_parameters.dart
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@ -1,23 +0,0 @@
import '../ecc/ec_key_pair.dart';
import '../ecc/ec_public_key.dart';
import '../identity_key.dart';
import '../identity_key_pair.dart';
class SymmetricSignalProtocolParameters {
SymmetricSignalProtocolParameters({
required this.ourBaseKey,
required this.ourRatchetKey,
required this.ourIdentityKey,
required this.theirBaseKey,
required this.theirRatchetKey,
required this.theirIdentityKey,
});
final ECKeyPair ourBaseKey;
final ECKeyPair ourRatchetKey;
final IdentityKeyPair ourIdentityKey;
final ECPublicKey theirBaseKey;
final ECPublicKey theirRatchetKey;
final IdentityKey theirIdentityKey;
}

156
libsignal_protocol_dart/lib/src/session_builder.dart
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@ -1,156 +0,0 @@
import 'package:optional/optional.dart';
import 'ecc/curve.dart';
import 'ecc/ec_key_pair.dart';
import 'invalid_key_exception.dart';
import 'protocol/pre_key_signal_message.dart';
import 'ratchet/alice_signal_protocol_parameters.dart';
import 'ratchet/bob_signal_protocol_parameters.dart';
import 'ratchet/ratcheting_session.dart';
import 'signal_protocol_address.dart';
import 'state/identity_key_store.dart';
import 'state/pre_key_bundle.dart';
import 'state/pre_key_store.dart';
import 'state/session_record.dart';
import 'state/session_store.dart';
import 'state/signal_protocol_store.dart';
import 'state/signed_pre_key_store.dart';
import 'untrusted_identity_exception.dart';
import 'util/log.dart' as $log;
class SessionBuilder {
SessionBuilder(this._sessionStore, this._preKeyStore, this._signedPreKeyStore,
this._identityKeyStore, this._remoteAddress);
SessionBuilder.fromSignalStore(
SignalProtocolStore store, SignalProtocolAddress remoteAddress)
: this(store, store, store, store, remoteAddress);
static const String tag = 'SessionBuilder';
SessionStore _sessionStore;
PreKeyStore _preKeyStore;
SignedPreKeyStore _signedPreKeyStore;
IdentityKeyStore _identityKeyStore;
SignalProtocolAddress _remoteAddress;
Future<Optional<int>> process(
SessionRecord sessionRecord, PreKeySignalMessage message) async {
final theirIdentityKey = message.getIdentityKey();
if (!await _identityKeyStore.isTrustedIdentity(
_remoteAddress, theirIdentityKey, Direction.receiving)) {
throw UntrustedIdentityException(
_remoteAddress.getName(), theirIdentityKey);
}
final unsignedPreKeyId = processV3(sessionRecord, message);
await _identityKeyStore.saveIdentity(_remoteAddress, theirIdentityKey);
return unsignedPreKeyId;
}
Future<Optional<int>> processV3(
SessionRecord sessionRecord, PreKeySignalMessage message) async {
if (sessionRecord.hasSessionState(
message.getMessageVersion(), message.getBaseKey().serialize())) {
$log.log(
"We've already setup a session for this V3 message, letting bundled message fall through...");
return const Optional.empty();
}
final ourSignedPreKey = _signedPreKeyStore
.loadSignedPreKey(message.getSignedPreKeyId())
.then((value) => value.getKeyPair());
late final Optional<ECKeyPair> ourOneTimePreKey;
if (message.getPreKeyId().isPresent) {
ourOneTimePreKey = Optional.of(await _preKeyStore
.loadPreKey(message.getPreKeyId().value)
.then((value) => value.getKeyPair()));
} else {
ourOneTimePreKey = const Optional<ECKeyPair>.empty();
}
if (!sessionRecord.isFresh()) sessionRecord.archiveCurrentState();
final parameters = BobSignalProtocolParameters(
theirBaseKey: message.getBaseKey(),
theirIdentityKey: message.getIdentityKey(),
ourIdentityKey: await _identityKeyStore.getIdentityKeyPair(),
ourSignedPreKey: await ourSignedPreKey,
ourRatchetKey: await ourSignedPreKey,
ourOneTimePreKey: ourOneTimePreKey,
);
RatchetingSession.initializeSessionBob(
sessionRecord.sessionState, parameters);
sessionRecord.sessionState.localRegistrationId =
await _identityKeyStore.getLocalRegistrationId();
sessionRecord.sessionState.remoteRegistrationId =
message.getRegistrationId();
sessionRecord.sessionState.aliceBaseKey = message.getBaseKey().serialize();
if (message.getPreKeyId().isPresent) {
return message.getPreKeyId();
} else {
return const Optional.empty();
}
}
Future<void> processPreKeyBundle(PreKeyBundle preKey) async {
if (!await _identityKeyStore.isTrustedIdentity(
_remoteAddress, preKey.getIdentityKey(), Direction.sending)) {
throw UntrustedIdentityException(
_remoteAddress.getName(), preKey.getIdentityKey());
}
if (preKey.getSignedPreKey() != null &&
!Curve.verifySignature(
preKey.getIdentityKey().publicKey,
preKey.getSignedPreKey()!.serialize(),
preKey.getSignedPreKeySignature())) {
throw InvalidKeyException('Invalid signature on device key!');
}
if (preKey.getSignedPreKey() == null) {
throw InvalidKeyException('No signed prekey!');
}
final sessionRecord = await _sessionStore.loadSession(_remoteAddress);
final ourBaseKey = Curve.generateKeyPair();
final theirSignedPreKey = preKey.getSignedPreKey();
final theirOneTimePreKey = Optional.ofNullable(preKey.getPreKey());
final theirOneTimePreKeyId = theirOneTimePreKey.isPresent
? Optional.ofNullable(preKey.getPreKeyId())
: const Optional<int>.empty();
final parameters = AliceSignalProtocolParameters(
ourBaseKey: ourBaseKey,
ourIdentityKey: await _identityKeyStore.getIdentityKeyPair(),
theirIdentityKey: preKey.getIdentityKey(),
theirSignedPreKey: theirSignedPreKey!,
theirRatchetKey: theirSignedPreKey,
theirOneTimePreKey: theirOneTimePreKey,
);
if (!sessionRecord.isFresh()) sessionRecord.archiveCurrentState();
RatchetingSession.initializeSessionAlice(
sessionRecord.sessionState, parameters);
sessionRecord.sessionState.setUnacknowledgedPreKeyMessage(
theirOneTimePreKeyId, preKey.getSignedPreKeyId(), ourBaseKey.publicKey);
sessionRecord.sessionState.localRegistrationId =
await _identityKeyStore.getLocalRegistrationId();
sessionRecord.sessionState.remoteRegistrationId =
preKey.getRegistrationId();
sessionRecord.sessionState.aliceBaseKey = ourBaseKey.publicKey.serialize();
await _identityKeyStore.saveIdentity(
_remoteAddress, preKey.getIdentityKey());
await _sessionStore.storeSession(_remoteAddress, sessionRecord);
}
}

290
libsignal_protocol_dart/lib/src/session_cipher.dart
View file

@ -1,290 +0,0 @@
import 'dart:collection';
import 'dart:core';
import 'dart:math';
import 'dart:typed_data';
import 'cbc.dart';
import 'decryption_callback.dart';
import 'duplicate_message_exception.dart';
import 'ecc/curve.dart';
import 'ecc/ec_public_key.dart';
import 'invalid_key_exception.dart';
import 'invalid_message_exception.dart';
import 'no_session_exception.dart';
import 'protocol/ciphertext_message.dart';
import 'protocol/pre_key_signal_message.dart';
import 'protocol/signal_message.dart';
import 'ratchet/chain_key.dart';
import 'ratchet/message_keys.dart';
import 'session_builder.dart';
import 'signal_protocol_address.dart';
import 'state/identity_key_store.dart';
import 'state/pre_key_store.dart';
import 'state/session_record.dart';
import 'state/session_state.dart';
import 'state/session_store.dart';
import 'state/signal_protocol_store.dart';
import 'state/signed_pre_key_store.dart';
import 'untrusted_identity_exception.dart';
class SessionCipher {
SessionCipher(
this._sessionStore,
this._preKeyStore,
SignedPreKeyStore signedPreKeyStore,
this._identityKeyStore,
this._remoteAddress) {
_sessionBuilder = SessionBuilder(_sessionStore, _preKeyStore,
signedPreKeyStore, _identityKeyStore, _remoteAddress);
}
SessionCipher.fromStore(
SignalProtocolStore store, SignalProtocolAddress remoteAddress)
: this(store, store, store, store, remoteAddress);
static final Object sessionLock = Object();
SessionStore _sessionStore;
IdentityKeyStore _identityKeyStore;
late SessionBuilder _sessionBuilder;
PreKeyStore _preKeyStore;
SignalProtocolAddress _remoteAddress;
Future<CiphertextMessage> encrypt(Uint8List paddedMessage) async {
final sessionRecord = await _sessionStore.loadSession(_remoteAddress);
final sessionState = sessionRecord.sessionState;
final chainKey = sessionState.getSenderChainKey();
final messageKeys = chainKey.getMessageKeys();
final senderEphemeral = sessionState.getSenderRatchetKey();
final previousCounter = sessionState.previousCounter;
final sessionVersion = sessionState.getSessionVersion();
final ciphertextBody = getCiphertext(messageKeys, paddedMessage);
CiphertextMessage ciphertextMessage = SignalMessage(
sessionVersion,
messageKeys.getMacKey(),
senderEphemeral,
chainKey.index,
previousCounter,
ciphertextBody,
sessionState.getLocalIdentityKey(),
sessionState.getRemoteIdentityKey());
if (sessionState.hasUnacknowledgedPreKeyMessage()) {
final items = sessionState.getUnacknowledgedPreKeyMessageItems();
final localRegistrationId = sessionState.localRegistrationId;
ciphertextMessage = PreKeySignalMessage.from(
sessionVersion,
localRegistrationId,
items.getPreKeyId(),
items.getSignedPreKeyId(),
items.getBaseKey(),
sessionState.getLocalIdentityKey(),
ciphertextMessage as SignalMessage);
}
final nextChainKey = chainKey.getNextChainKey();
sessionState.setSenderChainKey(nextChainKey);
if (!await _identityKeyStore.isTrustedIdentity(_remoteAddress,
sessionState.getRemoteIdentityKey(), Direction.sending)) {
throw UntrustedIdentityException(
_remoteAddress.getName(), sessionState.getRemoteIdentityKey());
}
await _identityKeyStore.saveIdentity(
_remoteAddress, sessionState.getRemoteIdentityKey());
await _sessionStore.storeSession(_remoteAddress, sessionRecord);
return ciphertextMessage;
}
Future<Uint8List> decrypt(PreKeySignalMessage ciphertext) async =>
decryptWithCallback(ciphertext, () {}());
Future<Uint8List> decryptWithCallback(
PreKeySignalMessage ciphertext, DecryptionCallback? callback) async {
final sessionRecord = await _sessionStore.loadSession(_remoteAddress);
final unsignedPreKeyId =
await _sessionBuilder.process(sessionRecord, ciphertext);
final plaintext = _decrypt(sessionRecord, ciphertext.getWhisperMessage());
if (callback != null) {
callback(plaintext);
}
await _sessionStore.storeSession(_remoteAddress, sessionRecord);
if (unsignedPreKeyId.isPresent) {
await _preKeyStore.removePreKey(unsignedPreKeyId.value);
}
return plaintext;
}
Future<Uint8List> decryptFromSignal(SignalMessage cipherText) async =>
decryptFromSignalWithCallback(cipherText, () {}());
Future<Uint8List> decryptFromSignalWithCallback(
SignalMessage cipherText, DecryptionCallback? callback) async {
if (!await _sessionStore.containsSession(_remoteAddress)) {
throw NoSessionException('No session for: $_remoteAddress');
}
final sessionRecord = await _sessionStore.loadSession(_remoteAddress);
final plaintext = _decrypt(sessionRecord, cipherText);
if (!await _identityKeyStore.isTrustedIdentity(
_remoteAddress,
sessionRecord.sessionState.getRemoteIdentityKey(),
Direction.receiving)) {
throw UntrustedIdentityException(_remoteAddress.getName(),
sessionRecord.sessionState.getRemoteIdentityKey());
}
await _identityKeyStore.saveIdentity(
_remoteAddress, sessionRecord.sessionState.getRemoteIdentityKey());
if (callback != null) {
callback(plaintext);
}
await _sessionStore.storeSession(_remoteAddress, sessionRecord);
return plaintext;
}
Uint8List _decrypt(SessionRecord sessionRecord, SignalMessage cipherText) {
final previousStates = sessionRecord.previousSessionStates;
final exceptions = <Exception>[];
try {
final sessionState =
SessionState.fromSessionState(sessionRecord.sessionState);
final plaintext = _decryptFromState(sessionState, cipherText);
sessionRecord.state = sessionState;
return plaintext;
} on InvalidMessageException catch (e) {
exceptions.add(e);
}
// ignore: deprecated_member_use
final pStates = HasNextIterator(previousStates.iterator);
while (pStates.hasNext) {
try {
final promotedState = SessionState.fromSessionState(pStates.next());
final plaintext = _decryptFromState(promotedState, cipherText);
previousStates.remove(promotedState);
sessionRecord.promoteState(promotedState);
return plaintext;
} on InvalidMessageException catch (e) {
exceptions.add(e);
}
}
throw InvalidMessageException('No valid sessions. $exceptions[0]');
}
Uint8List _decryptFromState(
SessionState sessionState, SignalMessage ciphertextMessage) {
if (!sessionState.hasSenderChain()) {
throw InvalidMessageException('Uninitialized session!');
}
if (ciphertextMessage.getMessageVersion() !=
sessionState.getSessionVersion()) {
throw InvalidMessageException(
'Message version $ciphertextMessage.getMessageVersion(), but session version $sessionState.getSessionVersion()');
}
final theirEphemeral = ciphertextMessage.getSenderRatchetKey();
final counter = ciphertextMessage.getCounter();
final chainKey = _getOrCreateChainKey(sessionState, theirEphemeral);
final messageKeys = _getOrCreateMessageKeys(
sessionState, theirEphemeral, chainKey!, counter);
ciphertextMessage.verifyMac(sessionState.getRemoteIdentityKey()!,
sessionState.getLocalIdentityKey(), messageKeys!.getMacKey());
final plaintext = _getPlaintext(messageKeys, ciphertextMessage.getBody());
sessionState.clearUnacknowledgedPreKeyMessage();
return plaintext;
}
Future<int> getRemoteRegistrationId() async {
final record = await _sessionStore.loadSession(_remoteAddress);
return record.sessionState.remoteRegistrationId;
}
Future<int> getSessionVersion() async {
if (!await _sessionStore.containsSession(_remoteAddress)) {
// throw IllegalStateException("No session for ($_remoteAddress)!");
}
final record = await _sessionStore.loadSession(_remoteAddress);
return record.sessionState.getSessionVersion();
}
ChainKey? _getOrCreateChainKey(
SessionState sessionState, ECPublicKey theirEphemeral) {
try {
if (sessionState.hasReceiverChain(theirEphemeral)) {
return sessionState.getReceiverChainKey(theirEphemeral);
} else {
final rootKey = sessionState.getRootKey();
final ourEphemeral = sessionState.getSenderRatchetKeyPair();
final receiverChain = rootKey.createChain(theirEphemeral, ourEphemeral);
final ourNewEphemeral = Curve.generateKeyPair();
final senderChain =
receiverChain.$1.createChain(theirEphemeral, ourNewEphemeral);
sessionState
..rootKey = senderChain.$1
..addReceiverChain(theirEphemeral, receiverChain.$2)
..previousCounter = max(sessionState.getSenderChainKey().index - 1, 0)
..setSenderChain(ourNewEphemeral, senderChain.$2);
return receiverChain.$2;
}
} on InvalidKeyException {
rethrow;
}
}
MessageKeys? _getOrCreateMessageKeys(SessionState sessionState,
ECPublicKey theirEphemeral, ChainKey chainKey, int counter) {
if (chainKey.index > counter) {
if (sessionState.hasMessageKeys(theirEphemeral, counter)) {
return sessionState.removeMessageKeys(theirEphemeral, counter);
} else {
throw DuplicateMessageException(
'Received message with old counter: ${chainKey.index}, $counter');
}
}
if (counter - chainKey.index > 2000) {
throw InvalidMessageException('Over 2000 messages into the future!');
}
while (chainKey.index < counter) {
final messageKeys = chainKey.getMessageKeys();
sessionState.setMessageKeys(theirEphemeral, messageKeys);
// ignore: parameter_assignments
chainKey = chainKey.getNextChainKey();
}
sessionState.setReceiverChainKey(
theirEphemeral, chainKey.getNextChainKey());
return chainKey.getMessageKeys();
}
Uint8List getCiphertext(MessageKeys messageKeys, Uint8List plaintext) =>
aesCbcEncrypt(messageKeys.getCipherKey(), messageKeys.getIv(), plaintext);
Uint8List _getPlaintext(MessageKeys messageKeys, Uint8List cipherText) =>
aesCbcDecrypt(
messageKeys.getCipherKey(), messageKeys.getIv(), cipherText);
}

26
libsignal_protocol_dart/lib/src/signal_protocol_address.dart
View file

@ -1,26 +0,0 @@
import 'package:meta/meta.dart';
@immutable
class SignalProtocolAddress {
const SignalProtocolAddress(this._name, this._deviceId);
final String _name;
final int _deviceId;
String getName() => _name;
int getDeviceId() => _deviceId;
@override
String toString() => '$_name:$_deviceId';
@override
bool operator ==(Object other) {
if (other is! SignalProtocolAddress) return false;
return _name == other._name && _deviceId == other._deviceId;
}
@override
int get hashCode => _name.hashCode ^ _deviceId;
}

219
libsignal_protocol_dart/lib/src/state/fingerprint_protocol.pb.dart
View file

@ -1,219 +0,0 @@
import 'dart:core' as $core;
import 'dart:core';
import 'package:protobuf/protobuf.dart' as $pb;
class LogicalFingerprint extends $pb.GeneratedMessage {
factory LogicalFingerprint({
$core.List<$core.int>? content,
}) {
final _result = create();
if (content != null) {
_result.content = content;
}
return _result;
}
LogicalFingerprint._() : super();
factory LogicalFingerprint.fromBuffer($core.List<$core.int> i,
[$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) =>
create()..mergeFromBuffer(i, r);
factory LogicalFingerprint.fromJson($core.String i,
[$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) =>
create()..mergeFromJson(i, r);
static final $pb.BuilderInfo _i = $pb.BuilderInfo(
const $core.bool.fromEnvironment('protobuf.omit_message_names')
? ''
: 'LogicalFingerprint',
package: const $pb.PackageName(
$core.bool.fromEnvironment('protobuf.omit_message_names')
? ''
: 'textsecure'),
createEmptyInstance: create)
..a<$core.List<$core.int>>(
1,
const $core.bool.fromEnvironment('protobuf.omit_field_names')
? ''
: 'content',
$pb.PbFieldType.OY)
..hasRequiredFields = false;
@$core.Deprecated('Using this can add significant overhead to your binary. '
'Use [GeneratedMessageGenericExtensions.deepCopy] instead. '
'Will be removed in next major version')
@override
LogicalFingerprint clone() => LogicalFingerprint()..mergeFromMessage(this);
@$core.Deprecated('Using this can add significant overhead to your binary. '
'Use [GeneratedMessageGenericExtensions.rebuild] instead. '
'Will be removed in next major version')
@override
LogicalFingerprint copyWith(void Function(LogicalFingerprint) updates) =>
super.copyWith((message) => updates(message as LogicalFingerprint))
as LogicalFingerprint; // ignore: deprecated_member_use
@override
$pb.BuilderInfo get info_ => _i;
@$core.pragma('dart2js:noInline')
static LogicalFingerprint create() => LogicalFingerprint._();
@override
LogicalFingerprint createEmptyInstance() => create();
@$core.pragma('dart2js:noInline')
static LogicalFingerprint getDefault() => _defaultInstance ??=
$pb.GeneratedMessage.$_defaultFor<LogicalFingerprint>(create);
static LogicalFingerprint? _defaultInstance;
@$pb.TagNumber(1)
$core.List<$core.int> get content => $_getN(0);
@$pb.TagNumber(1)
set content($core.List<$core.int> v) {
$_setBytes(0, v);
}
@$pb.TagNumber(1)
$core.bool hasContent() => $_has(0);
@$pb.TagNumber(1)
void clearContent() => clearField(1);
}
class CombinedFingerprints extends $pb.GeneratedMessage {
factory CombinedFingerprints({
$core.int? version,
LogicalFingerprint? localFingerprint,
LogicalFingerprint? remoteFingerprint,
}) {
final _result = create();
if (version != null) {
_result.version = version;
}
if (localFingerprint != null) {
_result.localFingerprint = localFingerprint;
}
if (remoteFingerprint != null) {
_result.remoteFingerprint = remoteFingerprint;
}
return _result;
}
CombinedFingerprints._() : super();
factory CombinedFingerprints.fromBuffer($core.List<$core.int> i,
[$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) =>
create()..mergeFromBuffer(i, r);
factory CombinedFingerprints.fromJson($core.String i,
[$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) =>
create()..mergeFromJson(i, r);
static final $pb.BuilderInfo _i = $pb.BuilderInfo(
const $core.bool.fromEnvironment('protobuf.omit_message_names')
? ''
: 'CombinedFingerprints',
package: const $pb.PackageName(
$core.bool.fromEnvironment('protobuf.omit_message_names')
? ''
: 'textsecure'),
createEmptyInstance: create)
..a<$core.int>(
1,
const $core.bool.fromEnvironment('protobuf.omit_field_names')
? ''
: 'version',
$pb.PbFieldType.OU3)
..aOM<LogicalFingerprint>(
2,
const $core.bool.fromEnvironment('protobuf.omit_field_names')
? ''
: 'localFingerprint',
protoName: 'localFingerprint',
subBuilder: LogicalFingerprint.create)
..aOM<LogicalFingerprint>(
3,
const $core.bool.fromEnvironment('protobuf.omit_field_names')
? ''
: 'remoteFingerprint',
protoName: 'remoteFingerprint',
subBuilder: LogicalFingerprint.create)
..hasRequiredFields = false;
@$core.Deprecated('Using this can add significant overhead to your binary. '
'Use [GeneratedMessageGenericExtensions.deepCopy] instead. '
'Will be removed in next major version')
@override
CombinedFingerprints clone() =>
CombinedFingerprints()..mergeFromMessage(this);
@$core.Deprecated('Using this can add significant overhead to your binary. '
'Use [GeneratedMessageGenericExtensions.rebuild] instead. '
'Will be removed in next major version')
@override
CombinedFingerprints copyWith(void Function(CombinedFingerprints) updates) =>
super.copyWith((message) => updates(message as CombinedFingerprints))
as CombinedFingerprints; // ignore: deprecated_member_use
@override
$pb.BuilderInfo get info_ => _i;
@$core.pragma('dart2js:noInline')
static CombinedFingerprints create() => CombinedFingerprints._();
@override
CombinedFingerprints createEmptyInstance() => create();
@$core.pragma('dart2js:noInline')
static CombinedFingerprints getDefault() => _defaultInstance ??=
$pb.GeneratedMessage.$_defaultFor<CombinedFingerprints>(create);
static CombinedFingerprints? _defaultInstance;
@$pb.TagNumber(1)
$core.int get version => $_getIZ(0);
@$pb.TagNumber(1)
set version($core.int v) {
$_setUnsignedInt32(0, v);
}
@$pb.TagNumber(1)
$core.bool hasVersion() => $_has(0);
@$pb.TagNumber(1)
void clearVersion() => clearField(1);
@$pb.TagNumber(2)
LogicalFingerprint get localFingerprint => $_getN(1);
@$pb.TagNumber(2)
set localFingerprint(LogicalFingerprint v) {
setField(2, v);
}
@$pb.TagNumber(2)
$core.bool hasLocalFingerprint() => $_has(1);
@$pb.TagNumber(2)
void clearLocalFingerprint() => clearField(2);
@$pb.TagNumber(2)
LogicalFingerprint ensureLocalFingerprint() => $_ensure(1);
@$pb.TagNumber(3)
LogicalFingerprint get remoteFingerprint => $_getN(2);
@$pb.TagNumber(3)
set remoteFingerprint(LogicalFingerprint v) {
setField(3, v);
}
@$pb.TagNumber(3)
$core.bool hasRemoteFingerprint() => $_has(2);
@$pb.TagNumber(3)
void clearRemoteFingerprint() => clearField(3);
@$pb.TagNumber(3)
LogicalFingerprint ensureRemoteFingerprint() => $_ensure(2);
}

5
libsignal_protocol_dart/lib/src/state/fingerprint_protocol.pbenum.dart
View file

@ -1,5 +0,0 @@
// Generated code. Do not modify.
// source: FingerprintProtocol.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,unnecessary_const,non_constant_identifier_names,library_prefixes,unused_import,unused_shown_name,return_of_invalid_type,unnecessary_this,prefer_final_fields

43
libsignal_protocol_dart/lib/src/state/fingerprint_protocol.pbjson.dart
View file

@ -1,43 +0,0 @@
import 'dart:convert' as $convert;
import 'dart:core' as $core;
import 'dart:typed_data' as $typed_data;
@$core.Deprecated('Use logicalFingerprintDescriptor instead')
const logicalFingerprint$json = {
'1': 'LogicalFingerprint',
'2': [
{'1': 'content', '3': 1, '4': 1, '5': 12, '10': 'content'},
],
};
/// Descriptor for `LogicalFingerprint`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List logicalFingerprintDescriptor =
$convert.base64Decode(
'ChJMb2dpY2FsRmluZ2VycHJpbnQSGAoHY29udGVudBgBIAEoDFIHY29udGVudA==');
@$core.Deprecated('Use combinedFingerprintsDescriptor instead')
const sombinedFingerprints$json = {
'1': 'CombinedFingerprints',
'2': [
{'1': 'version', '3': 1, '4': 1, '5': 13, '10': 'version'},
{
'1': 'localFingerprint',
'3': 2,
'4': 1,
'5': 11,
'6': '.textsecure.LogicalFingerprint',
'10': 'localFingerprint'
},
{
'1': 'remoteFingerprint',
'3': 3,
'4': 1,
'5': 11,
'6': '.textsecure.LogicalFingerprint',
'10': 'remoteFingerprint'
},
],
};
/// Descriptor for `CombinedFingerprints`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List combinedFingerprintsDescriptor = $convert.base64Decode(
'ChRDb21iaW5lZEZpbmdlcnByaW50cxIYCgd2ZXJzaW9uGAEgASgNUgd2ZXJzaW9uEkoKEGxvY2FsRmluZ2VycHJpbnQYAiABKAsyHi50ZXh0c2VjdXJlLkxvZ2ljYWxGaW5nZXJwcmludFIQbG9jYWxGaW5nZXJwcmludBJMChFyZW1vdGVGaW5nZXJwcmludBgDIAEoCzIeLnRleHRzZWN1cmUuTG9naWNhbEZpbmdlcnByaW50UhFyZW1vdGVGaW5nZXJwcmludA==');

7
libsignal_protocol_dart/lib/src/state/fingerprint_protocol.pbserver.dart
View file

@ -1,7 +0,0 @@
// Generated code. Do not modify.
// source: FingerprintProtocol.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,unnecessary_const,non_constant_identifier_names,library_prefixes,unused_import,unused_shown_name,return_of_invalid_type,unnecessary_this,prefer_final_fields,deprecated_member_use_from_same_package
export 'fingerprint_protocol.pb.dart';

20
libsignal_protocol_dart/lib/src/state/identity_key_store.dart
View file

@ -1,20 +0,0 @@
import '../identity_key.dart';
import '../identity_key_pair.dart';
import '../signal_protocol_address.dart';
enum Direction { sending, receiving }
abstract class IdentityKeyStore {
Future<IdentityKeyPair> getIdentityKeyPair();
Future<int> getLocalRegistrationId();
Future<bool> saveIdentity(
SignalProtocolAddress address,
IdentityKey? identityKey,
);
Future<bool> isTrustedIdentity(
SignalProtocolAddress address,
IdentityKey? identityKey,
Direction direction,
);
Future<IdentityKey?> getIdentity(SignalProtocolAddress address);
}

51
libsignal_protocol_dart/lib/src/state/impl/in_memory_identity_key_store.dart
View file

@ -1,51 +0,0 @@
import 'dart:collection';
import '../../eq.dart';
import '../../identity_key.dart';
import '../../identity_key_pair.dart';
import '../../signal_protocol_address.dart';
import '../identity_key_store.dart';
class InMemoryIdentityKeyStore extends IdentityKeyStore {
InMemoryIdentityKeyStore(this.identityKeyPair, this.localRegistrationId);
final trustedKeys = HashMap<SignalProtocolAddress, IdentityKey>();
final IdentityKeyPair identityKeyPair;
final int localRegistrationId;
@override
Future<IdentityKey?> getIdentity(SignalProtocolAddress address) async =>
trustedKeys[address]!;
@override
Future<IdentityKeyPair> getIdentityKeyPair() async => identityKeyPair;
@override
Future<int> getLocalRegistrationId() async => localRegistrationId;
@override
Future<bool> isTrustedIdentity(SignalProtocolAddress address,
IdentityKey? identityKey, Direction? direction) async {
final trusted = trustedKeys[address];
if (identityKey == null) {
return false;
}
return trusted == null || eq(trusted.serialize(), identityKey.serialize());
}
@override
Future<bool> saveIdentity(
SignalProtocolAddress address, IdentityKey? identityKey) async {
final existing = trustedKeys[address];
if (identityKey == null) {
return false;
}
if (identityKey != existing) {
trustedKeys[address] = identityKey;
return true;
} else {
return false;
}
}
}

32
libsignal_protocol_dart/lib/src/state/impl/in_memory_pre_key_store.dart
View file

@ -1,32 +0,0 @@
import 'dart:collection';
import 'dart:typed_data';
import '../../invalid_key_id_exception.dart';
import '../pre_key_record.dart';
import '../pre_key_store.dart';
class InMemoryPreKeyStore extends PreKeyStore {
final store = HashMap<int, Uint8List>();
@override
Future<bool> containsPreKey(int preKeyId) async =>
store.containsKey(preKeyId);
@override
Future<PreKeyRecord> loadPreKey(int preKeyId) async {
if (!store.containsKey(preKeyId)) {
throw InvalidKeyIdException('No such prekeyrecord! - $preKeyId');
}
return PreKeyRecord.fromBuffer(store[preKeyId]!);
}
@override
Future<void> removePreKey(int preKeyId) async {
store.remove(preKeyId);
}
@override
Future<void> storePreKey(int preKeyId, PreKeyRecord record) async {
store[preKeyId] = record.serialize();
}
}

63
libsignal_protocol_dart/lib/src/state/impl/in_memory_session_store.dart
View file

@ -1,63 +0,0 @@
import 'dart:collection';
import 'dart:typed_data';
import '../../signal_protocol_address.dart';
import '../session_record.dart';
import '../session_store.dart';
class InMemorySessionStore extends SessionStore {
InMemorySessionStore();
HashMap<SignalProtocolAddress, Uint8List> sessions =
HashMap<SignalProtocolAddress, Uint8List>();
@override
Future<bool> containsSession(SignalProtocolAddress address) async =>
sessions.containsKey(address);
@override
Future<void> deleteAllSessions(String name) async {
for (final k in sessions.keys.toList()) {
if (k.getName() == name) {
sessions.remove(k);
}
}
}
@override
Future<void> deleteSession(SignalProtocolAddress address) async {
sessions.remove(address);
}
@override
Future<List<int>> getSubDeviceSessions(String name) async {
final deviceIds = <int>[];
for (final key in sessions.keys) {
if (key.getName() == name && key.getDeviceId() != 1) {
deviceIds.add(key.getDeviceId());
}
}
return deviceIds;
}
@override
Future<SessionRecord> loadSession(SignalProtocolAddress address) async {
try {
if (await containsSession(address)) {
return SessionRecord.fromSerialized(sessions[address]!);
} else {
return SessionRecord();
}
} on Exception catch (e) {
throw AssertionError(e);
}
}
@override
Future<void> storeSession(
SignalProtocolAddress address, SessionRecord record) async {
sessions[address] = record.serialize();
}
}

119
libsignal_protocol_dart/lib/src/state/impl/in_memory_signal_protocol_store.dart
View file

@ -1,119 +0,0 @@
import 'dart:core';
import '../../identity_key.dart';
import '../../identity_key_pair.dart';
import '../../signal_protocol_address.dart';
import '../identity_key_store.dart';
import '../pre_key_record.dart';
import '../session_record.dart';
import '../signal_protocol_store.dart';
import '../signed_pre_key_record.dart';
import 'in_memory_identity_key_store.dart';
import 'in_memory_pre_key_store.dart';
import 'in_memory_session_store.dart';
import 'in_memory_signed_pre_key_store.dart';
class InMemorySignalProtocolStore implements SignalProtocolStore {
InMemorySignalProtocolStore(
IdentityKeyPair identityKeyPair, int registrationId) {
_identityKeyStore =
InMemoryIdentityKeyStore(identityKeyPair, registrationId);
}
final preKeyStore = InMemoryPreKeyStore();
final sessionStore = InMemorySessionStore();
final signedPreKeyStore = InMemorySignedPreKeyStore();
late IdentityKeyStore _identityKeyStore;
@override
Future<IdentityKeyPair> getIdentityKeyPair() async =>
_identityKeyStore.getIdentityKeyPair();
@override
Future<int> getLocalRegistrationId() async =>
_identityKeyStore.getLocalRegistrationId();
@override
Future<bool> saveIdentity(
SignalProtocolAddress address, IdentityKey? identityKey) async =>
_identityKeyStore.saveIdentity(address, identityKey);
@override
Future<bool> isTrustedIdentity(SignalProtocolAddress address,
IdentityKey? identityKey, Direction direction) async =>
_identityKeyStore.isTrustedIdentity(address, identityKey, direction);
@override
Future<IdentityKey?> getIdentity(SignalProtocolAddress address) async =>
_identityKeyStore.getIdentity(address);
@override
Future<PreKeyRecord> loadPreKey(int preKeyId) async =>
preKeyStore.loadPreKey(preKeyId);
@override
Future<void> storePreKey(int preKeyId, PreKeyRecord record) async {
await preKeyStore.storePreKey(preKeyId, record);
}
@override
Future<bool> containsPreKey(int preKeyId) async =>
preKeyStore.containsPreKey(preKeyId);
@override
Future<void> removePreKey(int preKeyId) async {
await preKeyStore.removePreKey(preKeyId);
}
@override
Future<SessionRecord> loadSession(SignalProtocolAddress address) async =>
sessionStore.loadSession(address);
@override
Future<List<int>> getSubDeviceSessions(String name) async =>
sessionStore.getSubDeviceSessions(name);
@override
Future<void> storeSession(
SignalProtocolAddress address, SessionRecord record) async {
await sessionStore.storeSession(address, record);
}
@override
Future<bool> containsSession(SignalProtocolAddress address) async =>
sessionStore.containsSession(address);
@override
Future<void> deleteSession(SignalProtocolAddress address) async {
await sessionStore.deleteSession(address);
}
@override
Future<void> deleteAllSessions(String name) async {
await sessionStore.deleteAllSessions(name);
}
@override
Future<SignedPreKeyRecord> loadSignedPreKey(int signedPreKeyId) async =>
signedPreKeyStore.loadSignedPreKey(signedPreKeyId);
@override
Future<List<SignedPreKeyRecord>> loadSignedPreKeys() async =>
signedPreKeyStore.loadSignedPreKeys();
@override
Future<void> storeSignedPreKey(
int signedPreKeyId, SignedPreKeyRecord record) async {
await signedPreKeyStore.storeSignedPreKey(signedPreKeyId, record);
}
@override
Future<bool> containsSignedPreKey(int signedPreKeyId) async =>
signedPreKeyStore.containsSignedPreKey(signedPreKeyId);
@override
Future<void> removeSignedPreKey(int signedPreKeyId) async {
await signedPreKeyStore.removeSignedPreKey(signedPreKeyId);
}
}

43
libsignal_protocol_dart/lib/src/state/impl/in_memory_signed_pre_key_store.dart
View file

@ -1,43 +0,0 @@
import 'dart:collection';
import 'dart:typed_data';
import '../../invalid_key_id_exception.dart';
import '../signed_pre_key_record.dart';
import '../signed_pre_key_store.dart';
class InMemorySignedPreKeyStore extends SignedPreKeyStore {
final store = HashMap<int, Uint8List>();
@override
Future<SignedPreKeyRecord> loadSignedPreKey(int signedPreKeyId) async {
if (!store.containsKey(signedPreKeyId)) {
throw InvalidKeyIdException(
'No such signedprekeyrecord! $signedPreKeyId');
}
return SignedPreKeyRecord.fromSerialized(store[signedPreKeyId]!);
}
@override
Future<List<SignedPreKeyRecord>> loadSignedPreKeys() async {
final results = <SignedPreKeyRecord>[];
for (final serialized in store.values) {
results.add(SignedPreKeyRecord.fromSerialized(serialized));
}
return results;
}
@override
Future<void> storeSignedPreKey(
int signedPreKeyId, SignedPreKeyRecord record) async {
store[signedPreKeyId] = record.serialize();
}
@override
Future<bool> containsSignedPreKey(int signedPreKeyId) async =>
store.containsKey(signedPreKeyId);
@override
Future<void> removeSignedPreKey(int signedPreKeyId) async {
store.remove(signedPreKeyId);
}
}

2256
libsignal_protocol_dart/lib/src/state/local_storage_protocol.pb.dart
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File diff suppressed because it is too large Load diff

5
libsignal_protocol_dart/lib/src/state/local_storage_protocol.pbenum.dart
View file

@ -1,5 +0,0 @@
// Generated code. Do not modify.
// source: LocalStorageProtocol.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,unnecessary_const,non_constant_identifier_names,library_prefixes,unused_import,unused_shown_name,return_of_invalid_type,unnecessary_this,prefer_final_fields

348
libsignal_protocol_dart/lib/src/state/local_storage_protocol.pbjson.dart
View file

@ -1,348 +0,0 @@
import 'dart:convert' as $convert;
import 'dart:core' as $core;
import 'dart:typed_data' as $typed_data;
@$core.Deprecated('Use sessionStructureDescriptor instead')
const sessionStructure$json = {
'1': 'SessionStructure',
'2': [
{'1': 'sessionVersion', '3': 1, '4': 1, '5': 13, '10': 'sessionVersion'},
{
'1': 'localIdentityPublic',
'3': 2,
'4': 1,
'5': 12,
'10': 'localIdentityPublic'
},
{
'1': 'remoteIdentityPublic',
'3': 3,
'4': 1,
'5': 12,
'10': 'remoteIdentityPublic'
},
{'1': 'rootKey', '3': 4, '4': 1, '5': 12, '10': 'rootKey'},
{'1': 'previousCounter', '3': 5, '4': 1, '5': 13, '10': 'previousCounter'},
{
'1': 'senderChain',
'3': 6,
'4': 1,
'5': 11,
'6': '.textsecure.SessionStructure.Chain',
'10': 'senderChain'
},
{
'1': 'receiverChains',
'3': 7,
'4': 3,
'5': 11,
'6': '.textsecure.SessionStructure.Chain',
'10': 'receiverChains'
},
{
'1': 'pendingKeyExchange',
'3': 8,
'4': 1,
'5': 11,
'6': '.textsecure.SessionStructure.PendingKeyExchange',
'10': 'pendingKeyExchange'
},
{
'1': 'pendingPreKey',
'3': 9,
'4': 1,
'5': 11,
'6': '.textsecure.SessionStructure.PendingPreKey',
'10': 'pendingPreKey'
},
{
'1': 'remoteRegistrationId',
'3': 10,
'4': 1,
'5': 13,
'10': 'remoteRegistrationId'
},
{
'1': 'localRegistrationId',
'3': 11,
'4': 1,
'5': 13,
'10': 'localRegistrationId'
},
{'1': 'needsRefresh', '3': 12, '4': 1, '5': 8, '10': 'needsRefresh'},
{'1': 'aliceBaseKey', '3': 13, '4': 1, '5': 12, '10': 'aliceBaseKey'},
],
'3': [
sessionStructureChain$json,
sessionStructurePendingKeyExchange$json,
sessionStructurePendingPreKey$json
],
};
@$core.Deprecated('Use sessionStructureDescriptor instead')
const sessionStructureChain$json = {
'1': 'Chain',
'2': [
{
'1': 'senderRatchetKey',
'3': 1,
'4': 1,
'5': 12,
'10': 'senderRatchetKey'
},
{
'1': 'senderRatchetKeyPrivate',
'3': 2,
'4': 1,
'5': 12,
'10': 'senderRatchetKeyPrivate'
},
{
'1': 'chainKey',
'3': 3,
'4': 1,
'5': 11,
'6': '.textsecure.SessionStructure.Chain.ChainKey',
'10': 'chainKey'
},
{
'1': 'messageKeys',
'3': 4,
'4': 3,
'5': 11,
'6': '.textsecure.SessionStructure.Chain.MessageKey',
'10': 'messageKeys'
},
],
'3': [
sessionStructureChainChainKey$json,
sessionStructureChainMessageKey$json
],
};
@$core.Deprecated('Use sessionStructureDescriptor instead')
const sessionStructureChainChainKey$json = {
'1': 'ChainKey',
'2': [
{'1': 'index', '3': 1, '4': 1, '5': 13, '10': 'index'},
{'1': 'key', '3': 2, '4': 1, '5': 12, '10': 'key'},
],
};
@$core.Deprecated('Use sessionStructureDescriptor instead')
const sessionStructureChainMessageKey$json = {
'1': 'MessageKey',
'2': [
{'1': 'index', '3': 1, '4': 1, '5': 13, '10': 'index'},
{'1': 'cipherKey', '3': 2, '4': 1, '5': 12, '10': 'cipherKey'},
{'1': 'macKey', '3': 3, '4': 1, '5': 12, '10': 'macKey'},
{'1': 'iv', '3': 4, '4': 1, '5': 12, '10': 'iv'},
],
};
@$core.Deprecated('Use sessionStructureDescriptor instead')
const sessionStructurePendingKeyExchange$json = {
'1': 'PendingKeyExchange',
'2': [
{'1': 'sequence', '3': 1, '4': 1, '5': 13, '10': 'sequence'},
{'1': 'localBaseKey', '3': 2, '4': 1, '5': 12, '10': 'localBaseKey'},
{
'1': 'localBaseKeyPrivate',
'3': 3,
'4': 1,
'5': 12,
'10': 'localBaseKeyPrivate'
},
{'1': 'localRatchetKey', '3': 4, '4': 1, '5': 12, '10': 'localRatchetKey'},
{
'1': 'localRatchetKeyPrivate',
'3': 5,
'4': 1,
'5': 12,
'10': 'localRatchetKeyPrivate'
},
{
'1': 'localIdentityKey',
'3': 7,
'4': 1,
'5': 12,
'10': 'localIdentityKey'
},
{
'1': 'localIdentityKeyPrivate',
'3': 8,
'4': 1,
'5': 12,
'10': 'localIdentityKeyPrivate'
},
],
};
@$core.Deprecated('Use sessionStructureDescriptor instead')
const sessionStructurePendingPreKey$json = {
'1': 'PendingPreKey',
'2': [
{'1': 'preKeyId', '3': 1, '4': 1, '5': 13, '10': 'preKeyId'},
{'1': 'signedPreKeyId', '3': 3, '4': 1, '5': 5, '10': 'signedPreKeyId'},
{'1': 'baseKey', '3': 2, '4': 1, '5': 12, '10': 'baseKey'},
],
};
/// Descriptor for `SessionStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List sessionStructureDescriptor = $convert.base64Decode(
'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');
@$core.Deprecated('Use recordStructureDescriptor instead')
const recordStructure$json = {
'1': 'RecordStructure',
'2': [
{
'1': 'currentSession',
'3': 1,
'4': 1,
'5': 11,
'6': '.textsecure.SessionStructure',
'10': 'currentSession'
},
{
'1': 'previousSessions',
'3': 2,
'4': 3,
'5': 11,
'6': '.textsecure.SessionStructure',
'10': 'previousSessions'
},
],
};
/// Descriptor for `RecordStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List recordStructureDescriptor = $convert.base64Decode(
'Cg9SZWNvcmRTdHJ1Y3R1cmUSRAoOY3VycmVudFNlc3Npb24YASABKAsyHC50ZXh0c2VjdXJlLlNlc3Npb25TdHJ1Y3R1cmVSDmN1cnJlbnRTZXNzaW9uEkgKEHByZXZpb3VzU2Vzc2lvbnMYAiADKAsyHC50ZXh0c2VjdXJlLlNlc3Npb25TdHJ1Y3R1cmVSEHByZXZpb3VzU2Vzc2lvbnM=');
@$core.Deprecated('Use preKeyRecordStructureDescriptor instead')
const preKeyRecordStructure$json = {
'1': 'PreKeyRecordStructure',
'2': [
{'1': 'id', '3': 1, '4': 1, '5': 13, '10': 'id'},
{'1': 'publicKey', '3': 2, '4': 1, '5': 12, '10': 'publicKey'},
{'1': 'privateKey', '3': 3, '4': 1, '5': 12, '10': 'privateKey'},
],
};
/// Descriptor for `PreKeyRecordStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List preKeyRecordStructureDescriptor = $convert.base64Decode(
'ChVQcmVLZXlSZWNvcmRTdHJ1Y3R1cmUSDgoCaWQYASABKA1SAmlkEhwKCXB1YmxpY0tleRgCIAEoDFIJcHVibGljS2V5Eh4KCnByaXZhdGVLZXkYAyABKAxSCnByaXZhdGVLZXk=');
@$core.Deprecated('Use signedPreKeyRecordStructureDescriptor instead')
const signedPreKeyRecordStructure$json = {
'1': 'SignedPreKeyRecordStructure',
'2': [
{'1': 'id', '3': 1, '4': 1, '5': 13, '10': 'id'},
{'1': 'publicKey', '3': 2, '4': 1, '5': 12, '10': 'publicKey'},
{'1': 'privateKey', '3': 3, '4': 1, '5': 12, '10': 'privateKey'},
{'1': 'signature', '3': 4, '4': 1, '5': 12, '10': 'signature'},
{'1': 'timestamp', '3': 5, '4': 1, '5': 6, '10': 'timestamp'},
],
};
/// Descriptor for `SignedPreKeyRecordStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List signedPreKeyRecordStructureDescriptor =
$convert.base64Decode(
'ChtTaWduZWRQcmVLZXlSZWNvcmRTdHJ1Y3R1cmUSDgoCaWQYASABKA1SAmlkEhwKCXB1YmxpY0tleRgCIAEoDFIJcHVibGljS2V5Eh4KCnByaXZhdGVLZXkYAyABKAxSCnByaXZhdGVLZXkSHAoJc2lnbmF0dXJlGAQgASgMUglzaWduYXR1cmUSHAoJdGltZXN0YW1wGAUgASgGUgl0aW1lc3RhbXA=');
@$core.Deprecated('Use identityKeyPairStructureDescriptor instead')
const identityKeyPairStructure$json = {
'1': 'IdentityKeyPairStructure',
'2': [
{'1': 'publicKey', '3': 1, '4': 1, '5': 12, '10': 'publicKey'},
{'1': 'privateKey', '3': 2, '4': 1, '5': 12, '10': 'privateKey'},
],
};
/// Descriptor for `IdentityKeyPairStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List identityKeyPairStructureDescriptor =
$convert.base64Decode(
'ChhJZGVudGl0eUtleVBhaXJTdHJ1Y3R1cmUSHAoJcHVibGljS2V5GAEgASgMUglwdWJsaWNLZXkSHgoKcHJpdmF0ZUtleRgCIAEoDFIKcHJpdmF0ZUtleQ==');
@$core.Deprecated('Use senderKeyStateStructureDescriptor instead')
const senderKeyStateStructure$json = {
'1': 'SenderKeyStateStructure',
'2': [
{'1': 'senderKeyId', '3': 1, '4': 1, '5': 13, '10': 'senderKeyId'},
{
'1': 'senderChainKey',
'3': 2,
'4': 1,
'5': 11,
'6': '.textsecure.SenderKeyStateStructure.SenderChainKey',
'10': 'senderChainKey'
},
{
'1': 'senderSigningKey',
'3': 3,
'4': 1,
'5': 11,
'6': '.textsecure.SenderKeyStateStructure.SenderSigningKey',
'10': 'senderSigningKey'
},
{
'1': 'senderMessageKeys',
'3': 4,
'4': 3,
'5': 11,
'6': '.textsecure.SenderKeyStateStructure.SenderMessageKey',
'10': 'senderMessageKeys'
},
],
'3': [
senderKeyStateStructureSenderChainKey$json,
senderKeyStateStructureSenderMessageKey$json,
senderKeyStateStructureSenderSigningKey$json
],
};
@$core.Deprecated('Use senderKeyStateStructureDescriptor instead')
const senderKeyStateStructureSenderChainKey$json = {
'1': 'SenderChainKey',
'2': [
{'1': 'iteration', '3': 1, '4': 1, '5': 13, '10': 'iteration'},
{'1': 'seed', '3': 2, '4': 1, '5': 12, '10': 'seed'},
],
};
@$core.Deprecated('Use senderKeyStateStructureDescriptor instead')
const senderKeyStateStructureSenderMessageKey$json = {
'1': 'SenderMessageKey',
'2': [
{'1': 'iteration', '3': 1, '4': 1, '5': 13, '10': 'iteration'},
{'1': 'seed', '3': 2, '4': 1, '5': 12, '10': 'seed'},
],
};
@$core.Deprecated('Use senderKeyStateStructureDescriptor instead')
const senderKeyStateStructureSenderSigningKey$json = {
'1': 'SenderSigningKey',
'2': [
{'1': 'public', '3': 1, '4': 1, '5': 12, '10': 'public'},
{'1': 'private', '3': 2, '4': 1, '5': 12, '10': 'private'},
],
};
/// Descriptor for `SenderKeyStateStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List senderKeyStateStructureDescriptor =
$convert.base64Decode(
'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');
@$core.Deprecated('Use senderKeyRecordStructureDescriptor instead')
const senderKeyRecordStructure$json = {
'1': 'SenderKeyRecordStructure',
'2': [
{
'1': 'senderKeyStates',
'3': 1,
'4': 3,
'5': 11,
'6': '.textsecure.SenderKeyStateStructure',
'10': 'senderKeyStates'
},
],
};
/// Descriptor for `SenderKeyRecordStructure`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List senderKeyRecordStructureDescriptor =
$convert.base64Decode(
'ChhTZW5kZXJLZXlSZWNvcmRTdHJ1Y3R1cmUSTQoPc2VuZGVyS2V5U3RhdGVzGAEgAygLMiMudGV4dHNlY3VyZS5TZW5kZXJLZXlTdGF0ZVN0cnVjdHVyZVIPc2VuZGVyS2V5U3RhdGVz');

7
libsignal_protocol_dart/lib/src/state/local_storage_protocol.pbserver.dart
View file

@ -1,7 +0,0 @@
// Generated code. Do not modify.
// source: LocalStorageProtocol.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,unnecessary_const,non_constant_identifier_names,library_prefixes,unused_import,unused_shown_name,return_of_invalid_type,unnecessary_this,prefer_final_fields,deprecated_member_use_from_same_package
export 'local_storage_protocol.pb.dart';

45
libsignal_protocol_dart/lib/src/state/pre_key_bundle.dart
View file

@ -1,45 +0,0 @@
import 'dart:typed_data';
import '../ecc/ec_public_key.dart';
import '../identity_key.dart';
class PreKeyBundle {
PreKeyBundle(
this._registrationId,
this._deviceId,
this._preKeyId,
this._preKeyPublic,
this._signedPreKeyId,
this._signedPreKeyPublic,
this._signedPreKeySignature,
this._identityKey);
final int _registrationId;
final int _deviceId;
final int? _preKeyId;
final ECPublicKey? _preKeyPublic;
final int _signedPreKeyId;
final ECPublicKey? _signedPreKeyPublic;
final Uint8List? _signedPreKeySignature;
final IdentityKey _identityKey;
int getDeviceId() => _deviceId;
int? getPreKeyId() => _preKeyId;
ECPublicKey? getPreKey() => _preKeyPublic;
int getSignedPreKeyId() => _signedPreKeyId;
ECPublicKey? getSignedPreKey() => _signedPreKeyPublic;
Uint8List? getSignedPreKeySignature() => _signedPreKeySignature;
IdentityKey getIdentityKey() => _identityKey;
int getRegistrationId() => _registrationId;
}

37
libsignal_protocol_dart/lib/src/state/pre_key_record.dart
View file

@ -1,37 +0,0 @@
import 'dart:typed_data';
import '../ecc/curve.dart';
import '../ecc/ec_key_pair.dart';
import '../invalid_key_exception.dart';
import 'local_storage_protocol.pb.dart';
class PreKeyRecord {
PreKeyRecord(int id, ECKeyPair keyPair) {
_structure = PreKeyRecordStructure.create()
..id = id
..publicKey = keyPair.publicKey.serialize()
..privateKey = keyPair.privateKey.serialize()
..toBuilder();
}
PreKeyRecord.fromBuffer(Uint8List serialized) {
_structure = PreKeyRecordStructure.fromBuffer(serialized);
}
late PreKeyRecordStructure _structure;
int get id => _structure.id;
ECKeyPair getKeyPair() {
try {
final publicKey =
Curve.decodePoint(Uint8List.fromList(_structure.publicKey), 0);
final privateKey =
Curve.decodePrivatePoint(Uint8List.fromList(_structure.privateKey));
return ECKeyPair(publicKey, privateKey);
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
Uint8List serialize() => _structure.writeToBuffer();
}

12
libsignal_protocol_dart/lib/src/state/pre_key_store.dart
View file

@ -1,12 +0,0 @@
import 'pre_key_record.dart';
abstract mixin class PreKeyStore {
Future<PreKeyRecord> loadPreKey(
int preKeyId); // throws InvalidKeyIdException;
Future<void> storePreKey(int preKeyId, PreKeyRecord record);
Future<bool> containsPreKey(int preKeyId);
Future<void> removePreKey(int preKeyId);
}

86
libsignal_protocol_dart/lib/src/state/session_record.dart
View file

@ -1,86 +0,0 @@
import 'dart:collection';
import 'dart:typed_data';
import '../eq.dart';
import 'local_storage_protocol.pb.dart';
import 'session_state.dart';
class SessionRecord {
SessionRecord() {
_fresh = true;
}
SessionRecord.fromSessionState(SessionState sessionState) {
_sessionState = sessionState;
_fresh = false;
}
SessionRecord.fromSerialized(Uint8List serialized) {
final record = RecordStructure.fromBuffer(serialized);
_sessionState = SessionState.fromStructure(record.currentSession);
_fresh = false;
for (final previousStructure in record.previousSessions) {
_previousStates.add(SessionState.fromStructure(previousStructure));
}
}
static const int archivedStatesMaxLength = 40;
var _sessionState = SessionState();
final _previousStates = LinkedList<SessionState>();
bool _fresh = false;
bool hasSessionState(int version, Uint8List aliceBaseKey) {
if (_sessionState.getSessionVersion() == version &&
eq(aliceBaseKey, _sessionState.aliceBaseKey)) {
return true;
}
for (final state in _previousStates) {
if (state.getSessionVersion() == version &&
eq(aliceBaseKey, _sessionState.aliceBaseKey)) {
return true;
}
}
return false;
}
SessionState get sessionState => _sessionState;
LinkedList<SessionState> get previousSessionStates => _previousStates;
void removePreviousSessionStates() {
_previousStates.clear();
}
bool isFresh() => _fresh;
void archiveCurrentState() {
promoteState(SessionState());
}
void promoteState(SessionState promotedState) {
_previousStates.addFirst(_sessionState);
_sessionState = promotedState;
if (_previousStates.length > archivedStatesMaxLength) {
_previousStates.remove(_previousStates.last);
}
}
set state(SessionState sessionState) {
_sessionState = sessionState;
}
Uint8List serialize() {
final previousStructures = <SessionStructure>[];
for (final previousState in _previousStates) {
previousStructures.add(previousState.structure);
}
final record = RecordStructure.create()
..currentSession = _sessionState.structure
..previousSessions.addAll(previousStructures);
return record.toBuilder().writeToBuffer();
}
}

399
libsignal_protocol_dart/lib/src/state/session_state.dart
View file

@ -1,399 +0,0 @@
import 'dart:collection';
import 'dart:typed_data';
import 'package:optional/optional.dart';
import '../ecc/curve.dart';
import '../ecc/ec_key_pair.dart';
import '../ecc/ec_public_key.dart';
import '../entry.dart';
import '../eq.dart';
import '../identity_key.dart';
import '../identity_key_pair.dart';
import '../invalid_key_exception.dart';
import '../kdf/hkdf.dart';
import '../ratchet/chain_key.dart';
import '../ratchet/message_keys.dart';
import '../ratchet/root_key.dart';
import '../util/log.dart' as $log;
import 'local_storage_protocol.pb.dart';
base class SessionState extends LinkedListEntry<SessionState> {
SessionState() {
_sessionStructure = SessionStructure.create();
}
SessionState.fromStructure(SessionStructure sessionStructure) {
_sessionStructure = sessionStructure;
}
SessionState.fromSessionState(SessionState copy) {
_sessionStructure = copy.structure;
}
static const int maxMessageKeys = 2000;
late SessionStructure _sessionStructure;
SessionStructure get structure => _sessionStructure;
Uint8List get aliceBaseKey =>
Uint8List.fromList(_sessionStructure.aliceBaseKey);
set aliceBaseKey(Uint8List aliceBaseKey) {
_sessionStructure.aliceBaseKey = aliceBaseKey;
}
set sessionVersion(int version) => _sessionStructure.sessionVersion = version;
int getSessionVersion() {
final sessionVersion = _sessionStructure.sessionVersion;
if (sessionVersion == 0) {
return 2;
} else {
return sessionVersion;
}
}
set remoteIdentityKey(IdentityKey identityKey) =>
_sessionStructure.remoteIdentityPublic = identityKey.serialize();
set localIdentityKey(IdentityKey identityKey) =>
_sessionStructure.localIdentityPublic = identityKey.serialize();
IdentityKey? getRemoteIdentityKey() {
try {
if (!_sessionStructure.hasRemoteIdentityPublic()) {
return null;
}
return IdentityKey.fromBytes(
Uint8List.fromList(_sessionStructure.remoteIdentityPublic), 0);
} on InvalidKeyException catch (e) {
$log.log(e);
return null;
}
}
IdentityKey getLocalIdentityKey() {
try {
return IdentityKey.fromBytes(
Uint8List.fromList(_sessionStructure.localIdentityPublic), 0);
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
int get previousCounter => _sessionStructure.previousCounter;
set previousCounter(int previousCounter) =>
_sessionStructure.previousCounter = previousCounter;
RootKey getRootKey() => RootKey(HKDF.createFor(getSessionVersion()),
Uint8List.fromList(_sessionStructure.rootKey));
set rootKey(RootKey rootKey) =>
_sessionStructure.rootKey = rootKey.getKeyBytes();
ECPublicKey getSenderRatchetKey() {
try {
return Curve.decodePoint(
Uint8List.fromList(_sessionStructure.senderChain.senderRatchetKey),
0);
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
ECKeyPair getSenderRatchetKeyPair() {
final publicKey = getSenderRatchetKey();
final privateKey = Curve.decodePrivatePoint(Uint8List.fromList(
_sessionStructure.senderChain.senderRatchetKeyPrivate));
return ECKeyPair(publicKey, privateKey);
}
bool hasReceiverChain(ECPublicKey senderEphemeral) =>
_getReceiverChain(senderEphemeral) != null;
bool hasSenderChain() => _sessionStructure.hasSenderChain();
(SessionStructureChain, int)? _getReceiverChain(ECPublicKey senderEphemeral) {
final receiverChains = _sessionStructure.receiverChains;
var index = 0;
for (final receiverChain in receiverChains) {
try {
final chainSenderRatchetKey = Curve.decodePoint(
Uint8List.fromList(receiverChain.senderRatchetKey), 0);
if (eq(
chainSenderRatchetKey.serialize(), senderEphemeral.serialize())) {
return (receiverChain, index);
}
} on InvalidKeyException catch (e) {
$log.log(e);
}
index++;
}
return null;
}
ChainKey? getReceiverChainKey(ECPublicKey senderEphemeral) {
final receiverChainAndIndex = _getReceiverChain(senderEphemeral);
final receiverChain = receiverChainAndIndex?.$1;
if (receiverChain == null) {
return null;
} else {
return ChainKey(
HKDF.createFor(getSessionVersion()),
Uint8List.fromList(receiverChain.chainKey.key),
receiverChain.chainKey.index);
}
}
void addReceiverChain(ECPublicKey senderRatchetKey, ChainKey chainKey) {
final chainKeyStructure = SessionStructureChainChainKey.create()
..key = chainKey.key;
final chain = SessionStructureChain.create()
..chainKey = chainKeyStructure
..senderRatchetKey = senderRatchetKey.serialize();
_sessionStructure.receiverChains.add(chain);
if (_sessionStructure.receiverChains.length > 5) {
_sessionStructure.receiverChains.removeAt(0);
}
}
void setSenderChain(ECKeyPair senderRatchetKeyPair, ChainKey chainKey) {
final chainKeyStructure = SessionStructureChainChainKey.create()
..key = chainKey.key
..index = chainKey.index;
final senderChain = SessionStructureChain.create()
..senderRatchetKey = senderRatchetKeyPair.publicKey.serialize()
..senderRatchetKeyPrivate = senderRatchetKeyPair.privateKey.serialize()
..chainKey = chainKeyStructure;
_sessionStructure.senderChain = senderChain;
}
ChainKey getSenderChainKey() {
final chainKeyStructure = _sessionStructure.senderChain.chainKey;
return ChainKey(HKDF.createFor(getSessionVersion()),
Uint8List.fromList(chainKeyStructure.key), chainKeyStructure.index);
}
void setSenderChainKey(ChainKey nextChainKey) {
final chainKey = SessionStructureChainChainKey.create()
..key = nextChainKey.key
..index = nextChainKey.index;
_sessionStructure.senderChain.chainKey = chainKey;
}
bool hasMessageKeys(ECPublicKey senderEphemeral, int counter) {
final chainAndIndex = _getReceiverChain(senderEphemeral);
if (chainAndIndex == null) {
return false;
}
final chain = chainAndIndex.$1;
final messageKeyList = chain.messageKeys;
for (final messageKey in messageKeyList) {
if (messageKey.index == counter) {
return true;
}
}
return false;
}
MessageKeys? removeMessageKeys(ECPublicKey senderEphemeral, int counter) {
final chainAndIndex = _getReceiverChain(senderEphemeral);
if (chainAndIndex == null) {
return null;
}
final chain = chainAndIndex.$1;
final messageKeyList = LinkedList<Entry<SessionStructureChainMessageKey>>();
chain.messageKeys.forEach((element) {
messageKeyList.add(Entry(element));
});
final messageKeyIterator = messageKeyList.iterator;
MessageKeys? result;
while (messageKeyIterator.moveNext()) {
final entry = messageKeyIterator.current;
final messageKey = entry.value;
if (messageKey.index == counter) {
final cipherKey = Uint8List.fromList(messageKey.cipherKey);
final macKey = Uint8List.fromList(messageKey.macKey);
final iv = Uint8List.fromList(messageKey.iv);
final index = messageKey.index;
result = MessageKeys(cipherKey, macKey, iv, index);
messageKeyList.remove(entry);
break;
}
}
chain.messageKeys.clear();
messageKeyList.forEach((entry) {
chain.messageKeys.add(entry.value);
});
_sessionStructure.receiverChains
.setAll(chainAndIndex.$2, <SessionStructureChain>[chain]);
return result;
}
void setMessageKeys(ECPublicKey senderEphemeral, MessageKeys messageKeys) {
final chainAndIndex = _getReceiverChain(senderEphemeral);
if (chainAndIndex == null) {
return;
}
final chain = chainAndIndex.$1;
final messageKeyStructure = SessionStructureChainMessageKey.create()
..cipherKey = Uint8List.fromList(messageKeys.getCipherKey())
..macKey = Uint8List.fromList(messageKeys.getMacKey())
..index = messageKeys.getCounter()
..iv = Uint8List.fromList(messageKeys.getIv());
chain.messageKeys.add(messageKeyStructure);
if (chain.messageKeys.length > maxMessageKeys) {
chain.messageKeys.removeAt(0);
}
_sessionStructure.receiverChains
.setAll(chainAndIndex.$2, <SessionStructureChain>[chain]);
}
void setReceiverChainKey(ECPublicKey senderEphemeral, ChainKey chainKey) {
final chainAndIndex = _getReceiverChain(senderEphemeral);
final chain = chainAndIndex!.$1;
final chainKeyStructure = SessionStructureChainChainKey.create()
..key = chainKey.key
..index = chainKey.index;
chain.chainKey = chainKeyStructure;
_sessionStructure.receiverChains
.setAll(chainAndIndex.$2, <SessionStructureChain>[chain]);
}
void setPendingKeyExchange(int sequence, ECKeyPair ourBaseKey,
ECKeyPair ourRatchetKey, IdentityKeyPair ourIdentityKey) {
final structure = SessionStructurePendingKeyExchange.create()
..sequence = sequence
..localBaseKey = ourBaseKey.publicKey.serialize()
..localBaseKeyPrivate = ourBaseKey.privateKey.serialize()
..localRatchetKey = ourRatchetKey.publicKey.serialize()
..localRatchetKeyPrivate = ourRatchetKey.privateKey.serialize()
..localIdentityKey = ourIdentityKey.getPublicKey().serialize()
..localIdentityKeyPrivate = ourIdentityKey.getPrivateKey().serialize();
_sessionStructure.pendingKeyExchange = structure;
}
int getPendingKeyExchangeSequence() =>
_sessionStructure.pendingKeyExchange.sequence;
ECKeyPair getPendingKeyExchangeBaseKey() {
final publicKey = Curve.decodePoint(
Uint8List.fromList(_sessionStructure.pendingKeyExchange.localBaseKey),
0);
final privateKey = Curve.decodePrivatePoint(Uint8List.fromList(
_sessionStructure.pendingKeyExchange.localBaseKeyPrivate));
return ECKeyPair(publicKey, privateKey);
}
ECKeyPair getPendingKeyExchangeRatchetKey() {
final publicKey = Curve.decodePointList(
_sessionStructure.pendingKeyExchange.localRatchetKey, 0);
final privateKey = Curve.decodePrivatePoint(Uint8List.fromList(
_sessionStructure.pendingKeyExchange.localRatchetKeyPrivate));
return ECKeyPair(publicKey, privateKey);
}
IdentityKeyPair getPendingKeyExchangeIdentityKey() {
final publicKey = IdentityKey.fromBytes(
Uint8List.fromList(
_sessionStructure.pendingKeyExchange.localIdentityKey),
0);
final privateKey = Curve.decodePrivatePoint(Uint8List.fromList(
_sessionStructure.pendingKeyExchange.localIdentityKeyPrivate));
return IdentityKeyPair(publicKey, privateKey);
}
bool hasPendingKeyExchange() => _sessionStructure.hasPendingKeyExchange();
void setUnacknowledgedPreKeyMessage(
Optional<int> preKeyId, int signedPreKeyId, ECPublicKey baseKey) {
final pending = SessionStructurePendingPreKey.create()
..signedPreKeyId = signedPreKeyId
..baseKey = baseKey.serialize();
if (preKeyId.isPresent) {
pending.preKeyId = preKeyId.value;
}
_sessionStructure.pendingPreKey = pending;
}
bool hasUnacknowledgedPreKeyMessage() => _sessionStructure.hasPendingPreKey();
UnacknowledgedPreKeyMessageItems getUnacknowledgedPreKeyMessageItems() {
try {
Optional<int> preKeyId;
if (_sessionStructure.pendingPreKey.hasPreKeyId()) {
preKeyId = Optional.of(_sessionStructure.pendingPreKey.preKeyId);
} else {
preKeyId = const Optional.empty();
}
return UnacknowledgedPreKeyMessageItems(
preKeyId,
_sessionStructure.pendingPreKey.signedPreKeyId,
Curve.decodePointList(_sessionStructure.pendingPreKey.baseKey, 0));
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
void clearUnacknowledgedPreKeyMessage() {
_sessionStructure.clearPendingPreKey();
}
set remoteRegistrationId(int registrationId) =>
_sessionStructure..remoteRegistrationId = registrationId;
int get remoteRegistrationId => _sessionStructure.remoteRegistrationId;
set localRegistrationId(int registrationId) =>
_sessionStructure.localRegistrationId = registrationId;
int get localRegistrationId => _sessionStructure.localRegistrationId;
Uint8List serialize() => _sessionStructure.writeToBuffer();
}
class UnacknowledgedPreKeyMessageItems {
UnacknowledgedPreKeyMessageItems(
this._preKeyId, this._signedPreKeyId, this._baseKey);
final Optional<int> _preKeyId;
final int _signedPreKeyId;
final ECPublicKey _baseKey;
Optional<int> getPreKeyId() => _preKeyId;
int getSignedPreKeyId() => _signedPreKeyId;
ECPublicKey getBaseKey() => _baseKey;
}

18
libsignal_protocol_dart/lib/src/state/session_store.dart
View file

@ -1,18 +0,0 @@
import '../signal_protocol_address.dart';
import 'session_record.dart';
abstract mixin class SessionStore {
Future<SessionRecord> loadSession(SignalProtocolAddress address);
Future<List<int>> getSubDeviceSessions(String name);
Future<void> storeSession(
SignalProtocolAddress address, SessionRecord record);
Future<bool> containsSession(SignalProtocolAddress address);
Future<void> deleteSession(SignalProtocolAddress address);
Future<void> deleteAllSessions(String name);
}

7
libsignal_protocol_dart/lib/src/state/signal_protocol_store.dart
View file

@ -1,7 +0,0 @@
import 'identity_key_store.dart';
import 'pre_key_store.dart';
import 'session_store.dart';
import 'signed_pre_key_store.dart';
abstract class SignalProtocolStore extends IdentityKeyStore
with PreKeyStore, SessionStore, SignedPreKeyStore {}

45
libsignal_protocol_dart/lib/src/state/signed_pre_key_record.dart
View file

@ -1,45 +0,0 @@
import 'dart:typed_data';
import 'package:fixnum/fixnum.dart';
import '../ecc/curve.dart';
import '../ecc/ec_key_pair.dart';
import '../invalid_key_exception.dart';
import 'local_storage_protocol.pb.dart';
class SignedPreKeyRecord {
SignedPreKeyRecord(
int id, Int64 timestamp, ECKeyPair keyPair, Uint8List signature) {
_structure = SignedPreKeyRecordStructure.create()
..id = id
..timestamp = timestamp
..publicKey = keyPair.publicKey.serialize()
..privateKey = keyPair.privateKey.serialize()
..signature = signature;
}
SignedPreKeyRecord.fromSerialized(Uint8List serialized) {
_structure = SignedPreKeyRecordStructure.fromBuffer(serialized);
}
late SignedPreKeyRecordStructure _structure;
int get id => _structure.id;
Int64 get timestamp => _structure.timestamp;
ECKeyPair getKeyPair() {
try {
final publicKey = Curve.decodePointList(_structure.publicKey, 0);
final privateKey =
Curve.decodePrivatePoint(Uint8List.fromList(_structure.privateKey));
return ECKeyPair(publicKey, privateKey);
} on InvalidKeyException catch (e) {
throw AssertionError(e);
}
}
Uint8List get signature => Uint8List.fromList(_structure.signature);
Uint8List serialize() => _structure.writeToBuffer();
}

15
libsignal_protocol_dart/lib/src/state/signed_pre_key_store.dart
View file

@ -1,15 +0,0 @@
import 'signed_pre_key_record.dart';
abstract mixin class SignedPreKeyStore {
Future<SignedPreKeyRecord> loadSignedPreKey(
int signedPreKeyId,
); //throws InvalidKeyIdException;
Future<List<SignedPreKeyRecord>> loadSignedPreKeys();
Future<void> storeSignedPreKey(int signedPreKeyId, SignedPreKeyRecord record);
Future<bool> containsSignedPreKey(int signedPreKeyId);
Future<void> removeSignedPreKey(int signedPreKeyId);
}

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