Compressed DecryptCommon(CipherV2 cipherV2, KeyMaterial64 keyMaterial64, LongRunningOperationContext context) { if (context == null) { context = new LongRunningOperation(progress => { }, () => { }).Context; } Guard.NotNull(new object[] { cipherV2, keyMaterial64 }); EnsurePlatform(); InputDerivedKey32 inputDerivedKey = cipherV2.RoundsExponent.Value == RoundsExponent.DontMakeRounds ? CreateDerivedKeyWithSHA256(cipherV2.IV16, keyMaterial64) : CreatePasswordDerivedKeyWithBCrypt(cipherV2.IV16, keyMaterial64, cipherV2.RoundsExponent, context); XDSSecAPIInternal.IVCache ivCache = cipherV2.RoundsExponent.Value == RoundsExponent.DontMakeRounds ? null : this._internal.CreateIVTable(cipherV2.IV16, cipherV2.RoundsExponent.Value); RandomKey32 randomKey = this._internal.AESDecryptRandomKeyWithPasswordDerivedKey(cipherV2, inputDerivedKey, ivCache, context); MAC16 decryptedMAC = this._internal.AESDecryptMAC(cipherV2, randomKey, ivCache, context); MAC16 actualMAC = CreateMAC(cipherV2, context); if (!actualMAC.GetBytes().SequenceEqual(decryptedMAC.GetBytes())) { throw new Exception(LocalizableStrings.MsgPasswordError); } PaddedData paddedData = this._internal.AESDecryptMessage(cipherV2, cipherV2.IV16, randomKey, ivCache, context); Compressed compressed = this._internal.RemovePadding(paddedData); return(compressed); }
public void AESEncryptMACWithRandomKey(CipherV2 cipherV2, MAC16 mac, RandomKey32 randomKey, IVCache ivCache, LongRunningOperationContext context) { Guard.NotNull(new object[] { cipherV2, mac, randomKey, context }); if (cipherV2.RoundsExponent.Value == RoundsExponent.DontMakeRounds) { Debug.Assert(ivCache == null); cipherV2.MACCipher16 = new MACCipher16(this._platform.ComputeAESRound(AESDir.Encrypt, cipherV2.IV16.GetBytes(), mac.GetBytes(), randomKey.GetBytes())); } else { context.EncryptionProgress.Message = LocalizableStrings.MsgEncryptingMAC; cipherV2.MACCipher16 = new MACCipher16(ComputeAESWithRounds(AESDir.Encrypt, cipherV2.IV16, mac.GetBytes(), randomKey.GetBytes(), cipherV2.RoundsExponent.Value, ivCache, context)); } }
CipherV2 EncryptCommon(KeyMaterial64 keyMaterial64, RoundsExponent roundsExponent, LongRunningOperationContext context, Compressed compressed) { if (context == null) { context = new LongRunningOperation(progress => { }, () => { }).Context; } if (this._log) { Debug.WriteLine("KeyMaterial64:"); Debug.WriteLine(keyMaterial64.GetBytes().ToHexView(false)); } if (this._log) { Debug.WriteLine("Compressed:"); Debug.WriteLine(compressed.GetBytes().ToHexView(false)); } PaddedData paddedData = this._internal.ApplyRandomPadding(compressed); if (this._log) { Debug.WriteLine("PaddedData:"); Debug.WriteLine(paddedData.GetBytes().ToHexView(false)); Debug.WriteLine("PlainTextPadding:"); Debug.WriteLine(paddedData.PlaintextPadding); } IV16 iv = new IV16(this._platform.GenerateRandomBytes(16)); if (this._log) { Debug.WriteLine("IV16:"); Debug.WriteLine(iv.GetBytes().ToHexView(false)); } InputDerivedKey32 inputDerivedKey = roundsExponent.Value == RoundsExponent.DontMakeRounds ? CreateDerivedKeyWithSHA256(iv, keyMaterial64) : CreatePasswordDerivedKeyWithBCrypt(iv, keyMaterial64, roundsExponent, context); if (this._log) { Debug.WriteLine("InputDerivedKey32:"); Debug.WriteLine(inputDerivedKey.GetBytes().ToHexView(false)); } RandomKey32 randomKey = new RandomKey32(this._platform.GenerateRandomBytes(32)); if (this._log) { Debug.WriteLine("RandomKey32:"); Debug.WriteLine(randomKey.GetBytes().ToHexView(false)); } XDSSecAPIInternal.IVCache ivCache = roundsExponent.Value == RoundsExponent.DontMakeRounds ? null : this._internal.CreateIVTable(iv, roundsExponent.Value); var cipherV2 = new CipherV2 { RoundsExponent = roundsExponent, IV16 = iv }; this._internal.AESEncryptRandomKeyWithInputDerivedKey(inputDerivedKey, randomKey, cipherV2, ivCache, context); if (this._log) { Debug.WriteLine("RandomKeyCipher32:"); Debug.WriteLine(cipherV2.RandomKeyCipher32.GetBytes().ToHexView(false)); } this._internal.AESEncryptMessageWithRandomKey(paddedData, randomKey, cipherV2, ivCache, context); if (this._log) { Debug.WriteLine("MessageCipher:"); Debug.WriteLine(cipherV2.MessageCipher.GetBytes().ToHexView(false)); } MAC16 mac = CreateMAC(cipherV2, context); if (this._log) { Debug.WriteLine("MAC16:"); Debug.WriteLine(mac.GetBytes().ToHexView(false)); } this._internal.AESEncryptMACWithRandomKey(cipherV2, mac, randomKey, ivCache, context); if (this._log) { Debug.WriteLine("MACCipher16:"); Debug.WriteLine(cipherV2.MACCipher16.GetBytes().ToHexView(false)); } return(cipherV2); }