protected override bool TryEncryptCfbCore(
ReadOnlySpan <byte> plaintext,
ReadOnlySpan <byte> iv,
Span <byte> destination,
PaddingMode paddingMode,
int feedbackSizeInBits,
out int bytesWritten)
{
ValidateCFBFeedbackSize(feedbackSizeInBits);
UniversalCryptoTransform transform = CreateTransformCore(
CipherMode.CFB,
paddingMode,
Key,
iv: iv.ToArray(),
blockSize: BlockSize / BitsPerByte,
paddingSize: feedbackSizeInBits / BitsPerByte,
feedbackSizeInBits / BitsPerByte,
encrypting: true);
using (transform)
{
return(transform.TransformOneShot(plaintext, destination, out bytesWritten));
}
}
protected override bool TryDecryptEcbCore(
ReadOnlySpan <byte> ciphertext,
Span <byte> destination,
PaddingMode paddingMode,
out int bytesWritten)
{
if (!ValidKeySize(Key.Length, out int keySize))
{
throw new InvalidOperationException(SR.Cryptography_InvalidKeySize);
}
int effectiveKeySize = EffectiveKeySizeValue == 0 ? keySize : EffectiveKeySize;
UniversalCryptoTransform transform = CreateTransformCore(
CipherMode.ECB,
paddingMode,
Key,
effectiveKeyLength: effectiveKeySize,
iv: null,
blockSize: BlockSize / BitsPerByte,
0, /*feedback size */
paddingSize: BlockSize / BitsPerByte,
encrypting: false);
using (transform)
{
return(transform.TransformOneShot(ciphertext, destination, out bytesWritten));
}
}
private ICryptoTransform CreateCryptoTransformCore(Func <CngKey> cngKeyFactory, byte[] iv, bool encrypting)
{
int blockSizeInBytes = _outer.BlockSize.BitSizeToByteSize();
BasicSymmetricCipher cipher = new BasicSymmetricCipherCng(cngKeyFactory, _outer.Mode, blockSizeInBytes, iv, encrypting);
return(UniversalCryptoTransform.Create(_outer.Padding, cipher, encrypting));
}
private static ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
int effectiveKeyLength,
byte[]?iv,
int blockSize,
int feedbackSize,
int paddingSize,
bool encrypting)
{
// The algorithm pointer is a static pointer, so not having any cleanup code is correct.
IntPtr algorithm;
switch (cipherMode)
{
case CipherMode.CBC:
algorithm = Interop.Crypto.EvpRC2Cbc();
break;
case CipherMode.ECB:
algorithm = Interop.Crypto.EvpRC2Ecb();
break;
default:
throw new NotSupportedException();
}
BasicSymmetricCipher cipher = new OpenSslCipher(algorithm, cipherMode, blockSize, paddingSize, key, effectiveKeyLength, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private ICryptoTransform CreatePersistedCryptoTransformCore(Func <CngKey> cngKeyFactory, byte[] iv, bool encrypting)
{
// note: iv is guaranteed to be cloned before this method, so no need to clone it again
int blockSizeInBytes = _outer.BlockSize.BitSizeToByteSize();
BasicSymmetricCipher cipher = new BasicSymmetricCipherNCrypt(cngKeyFactory, _outer.Mode, blockSizeInBytes, iv, encrypting);
return(UniversalCryptoTransform.Create(_outer.Padding, cipher, encrypting));
}
private ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[] iv,
int blockSize,
bool encrypting)
{
BasicSymmetricCipher cipher = new TripleDesOpenSslCipher(cipherMode, blockSize, key, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private static ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[] iv,
int blockSize,
bool encrypting)
{
SafeAlgorithmHandle algorithm = DesBCryptModes.GetSharedHandle(cipherMode);
BasicSymmetricCipher cipher = new BasicSymmetricCipherBCrypt(algorithm, cipherMode, blockSize, key, false, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private static ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[] iv,
int blockSize,
bool encrypting)
{
SafeAlgorithmHandle algorithm = GetCipherAlgorithm(cipherMode);
BasicSymmetricCipher cipher = new CngCipher(algorithm, cipherMode, blockSize, key, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private ICryptoTransform CreateEphemeralCryptoTransformCore(byte[] key, byte[] iv, bool encrypting)
{
int blockSizeInBytes = _outer.BlockSize.BitSizeToByteSize();
SafeAlgorithmHandle algorithmModeHandle = _outer.GetEphemeralModeHandle();
BasicSymmetricCipher cipher = new BasicSymmetricCipherBCrypt(
algorithmModeHandle,
_outer.Mode,
blockSizeInBytes,
key,
iv,
encrypting);
return(UniversalCryptoTransform.Create(_outer.Padding, cipher, encrypting));
}
private static ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[] iv,
int blockSize,
bool encrypting)
{
// The algorithm pointer is a static pointer, so not having any cleanup code is correct.
IntPtr algorithm = GetAlgorithm(key.Length * 8, cipherMode);
BasicSymmetricCipher cipher = new OpenSslCipher(algorithm, cipherMode, blockSize, key, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private static ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
int effectiveKeyLength,
byte[]?iv,
int blockSize,
bool encrypting)
{
using (SafeAlgorithmHandle algorithm = RC2BCryptModes.GetHandle(cipherMode, effectiveKeyLength))
{
// The BasicSymmetricCipherBCrypt ctor will increase algorithm reference count and take ownership.
BasicSymmetricCipher cipher = new BasicSymmetricCipherBCrypt(algorithm, cipherMode, blockSize, key, true, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
}
private UniversalCryptoTransform CreatePersistedCryptoTransformCore(Func <CngKey> cngKeyFactory, byte[]?iv, bool encrypting, PaddingMode padding, CipherMode mode)
{
// note: iv is guaranteed to be cloned before this method, so no need to clone it again
int blockSizeInBytes = _outer.BlockSize.BitSizeToByteSize();
int feedbackSizeInBytes = _outer.FeedbackSize;
BasicSymmetricCipher cipher = new BasicSymmetricCipherNCrypt(
cngKeyFactory,
mode,
blockSizeInBytes,
iv,
encrypting,
feedbackSizeInBytes,
_outer.GetPaddingSize(mode, _outer.FeedbackSize));
return(UniversalCryptoTransform.Create(padding, cipher, encrypting));
}
private UniversalCryptoTransform CreateEphemeralCryptoTransformCore(byte[] key, byte[]?iv, bool encrypting, PaddingMode padding, CipherMode mode)
{
int blockSizeInBytes = _outer.BlockSize.BitSizeToByteSize();
SafeAlgorithmHandle algorithmModeHandle = _outer.GetEphemeralModeHandle(mode);
BasicSymmetricCipher cipher = new BasicSymmetricCipherBCrypt(
algorithmModeHandle,
mode,
blockSizeInBytes,
_outer.GetPaddingSize(mode, _outer.FeedbackSize),
key,
ownsParentHandle: false,
iv,
encrypting);
return(UniversalCryptoTransform.Create(padding, cipher, encrypting));
}
private static ICryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[] iv,
int blockSize,
bool encrypting)
{
BasicSymmetricCipher cipher = new AppleCCCryptor(
Interop.AppleCrypto.PAL_SymmetricAlgorithm.TripleDES,
cipherMode,
blockSize,
key,
iv,
encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private static UniversalCryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[]?iv,
int blockSize,
int feedbackSize,
int paddingSize,
bool encrypting)
{
// The algorithm pointer is a static pointer, so not having any cleanup code is correct.
IntPtr algorithm = GetAlgorithm(cipherMode, feedbackSize);
Interop.Crypto.EnsureLegacyAlgorithmsRegistered();
BasicSymmetricCipher cipher = new OpenSslCipher(algorithm, cipherMode, blockSize, paddingSize, key, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
protected override bool TryEncryptEcbCore(
ReadOnlySpan <byte> plaintext,
Span <byte> destination,
PaddingMode paddingMode,
out int bytesWritten)
{
UniversalCryptoTransform transform = CreateTransformCore(
CipherMode.ECB,
paddingMode,
Key,
iv: null,
blockSize: BlockSize / BitsPerByte,
paddingSize: BlockSize / BitsPerByte,
0, /*feedback size */
encrypting: true);
using (transform)
{
return(transform.TransformOneShot(plaintext, destination, out bytesWritten));
}
}
private static UniversalCryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[]?iv,
int blockSize,
int feedbackSize,
int paddingSize,
bool encrypting)
{
// The algorithm pointer is a static pointer, so not having any cleanup code is correct.
IntPtr algorithm = IntPtr.Zero;
switch (cipherMode)
{
case CipherMode.CBC:
algorithm = Interop.Crypto.EvpDesCbc();
break;
case CipherMode.ECB:
algorithm = Interop.Crypto.EvpDesEcb();
break;
case CipherMode.CFB:
Debug.Assert(feedbackSize == 1, "DES with CFB should have FeedbackSize set to 1");
algorithm = Interop.Crypto.EvpDesCfb8();
break;
default:
throw new NotSupportedException();
}
Interop.Crypto.EnsureLegacyAlgorithmsRegistered();
BasicSymmetricCipher cipher = new OpenSslCipher(algorithm, cipherMode, blockSize, paddingSize, key, 0, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
private static UniversalCryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[]?iv,
int blockSize,
int feedbackSizeInBytes,
int paddingSize,
bool encrypting)
{
BasicSymmetricCipher cipher = new AppleCCCryptor(
Interop.AppleCrypto.PAL_SymmetricAlgorithm.RC2,
cipherMode,
blockSize,
key,
iv,
encrypting,
feedbackSizeInBytes,
paddingSize);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
protected override bool TryDecryptCbcCore(
ReadOnlySpan <byte> ciphertext,
ReadOnlySpan <byte> iv,
Span <byte> destination,
PaddingMode paddingMode,
out int bytesWritten)
{
UniversalCryptoTransform transform = CreateTransformCore(
CipherMode.CBC,
paddingMode,
Key,
iv: iv.ToArray(),
blockSize: BlockSize / BitsPerByte,
paddingSize: BlockSize / BitsPerByte,
0, /*feedback size */
encrypting: false);
using (transform)
{
return(transform.TransformOneShot(ciphertext, destination, out bytesWritten));
}
}
private static UniversalCryptoTransform CreateTransformCore(
CipherMode cipherMode,
PaddingMode paddingMode,
byte[] key,
byte[]?iv,
int blockSize,
int paddingSize,
int feedbackSize,
bool encrypting)
{
// The algorithm pointer is a static pointer, so not having any cleanup code is correct.
IntPtr algorithm;
switch ((cipherMode, feedbackSize))
{
case (CipherMode.CBC, _):
algorithm = Interop.Crypto.EvpDes3Cbc();
break;
case (CipherMode.ECB, _):
algorithm = Interop.Crypto.EvpDes3Ecb();
break;
case (CipherMode.CFB, 1):
algorithm = Interop.Crypto.EvpDes3Cfb8();
break;
case (CipherMode.CFB, 8):
algorithm = Interop.Crypto.EvpDes3Cfb64();
break;
default:
throw new NotSupportedException();
}
BasicSymmetricCipher cipher = new OpenSslCipher(algorithm, cipherMode, blockSize, paddingSize, key, 0, iv, encrypting);
return(UniversalCryptoTransform.Create(paddingMode, cipher, encrypting));
}
