public Compressed RemovePadding(PaddedData paddedData)
{
Guard.NotNull(paddedData);
var paddingRemoved = new byte[paddedData.GetBytes().Length - paddedData.PlaintextPadding.Value];
Buffer.BlockCopy(paddedData.GetBytes(), 0, paddingRemoved, 0, paddingRemoved.Length);
return(new Compressed(paddingRemoved));
}
public void AESEncryptMessageWithRandomKey(PaddedData paddedData, RandomKey32 randomKey, CipherV2 cipherV2, IVCache ivCache, LongRunningOperationContext context)
{
Guard.NotNull(new object[] { paddedData, randomKey, cipherV2, context });
cipherV2.PlaintextPadding = paddedData.PlaintextPadding;
if (cipherV2.RoundsExponent.Value == RoundsExponent.DontMakeRounds)
{
Debug.Assert(ivCache == null);
cipherV2.MessageCipher = new MessageCipher(this._platform.ComputeAESRound(AESDir.Encrypt, cipherV2.IV16.GetBytes(), paddedData.GetBytes(), randomKey.GetBytes()));
}
else
{
context.EncryptionProgress.Message = LocalizableStrings.MsgEncryptingMessage;
cipherV2.MessageCipher = new MessageCipher(ComputeAESWithRounds(AESDir.Encrypt, cipherV2.IV16, paddedData.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);
}
