public Cleartext Decompress(Compressed compressed)
{
Guard.NotNull(compressed);
var clearText = Deflate.Decompress(compressed.GetBytes(), Encoding.UTF8);
return(new Cleartext(clearText));
}
public Clearbytes DecompressBytes(Compressed compressed)
{
Guard.NotNull(compressed);
var clearBytes = Deflate.DecompressBytes(compressed.GetBytes());
return(new Clearbytes(clearBytes));
}
public PaddedData ApplyRandomPadding(Compressed compressed)
{
Guard.NotNull(compressed);
int requiredPadding;
if (compressed.GetBytes().Length % 16 == 0)
{
requiredPadding = 0;
}
else
{
requiredPadding = 16 - compressed.GetBytes().Length % 16;
}
if (requiredPadding == 0)
{
return(new PaddedData(compressed.GetBytes(), new PlaintextPadding(requiredPadding)));
}
var paddingBytes = this._platform.GenerateRandomBytes(requiredPadding);
var paddedDataBytes = new byte[compressed.GetBytes().Length + requiredPadding];
Buffer.BlockCopy(compressed.GetBytes(), 0, paddedDataBytes, 0, compressed.GetBytes().Length);
Buffer.BlockCopy(paddingBytes, 0, paddedDataBytes, compressed.GetBytes().Length, paddingBytes.Length);
return(new PaddedData(paddedDataBytes, new PlaintextPadding(requiredPadding)));
}
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);
}