private int[] generateWorkingKey(bool forEncryption, byte[] userKey)
{
this.forEncryption = forEncryption;
if (userKey.Length != 32)
{
throw new ArgumentException("Key length invalid. Key needs to be 32 byte - 256 bit!!!");
}
int[] array = new int[8];
for (int num = 0; num != 8; num++)
{
array[num] = Gost28147Engine.bytesToint(userKey, num * 4);
}
return(array);
}
private void Gost28147Func(int[] workingKey, byte[] inBytes, int inOff, byte[] outBytes, int outOff)
{
int num = Gost28147Engine.bytesToint(inBytes, inOff);
int num2 = Gost28147Engine.bytesToint(inBytes, inOff + 4);
if (this.forEncryption)
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 8; j++)
{
int num3 = num;
int num4 = this.Gost28147_mainStep(num, workingKey[j]);
num = (num2 ^ num4);
num2 = num3;
}
}
for (int k = 7; k > 0; k--)
{
int num3 = num;
num = (num2 ^ this.Gost28147_mainStep(num, workingKey[k]));
num2 = num3;
}
}
else
{
for (int l = 0; l < 8; l++)
{
int num3 = num;
num = (num2 ^ this.Gost28147_mainStep(num, workingKey[l]));
num2 = num3;
}
for (int m = 0; m < 3; m++)
{
int num5 = 7;
while (num5 >= 0 && (m != 2 || num5 != 0))
{
int num3 = num;
num = (num2 ^ this.Gost28147_mainStep(num, workingKey[num5]));
num2 = num3;
num5--;
}
}
}
num2 ^= this.Gost28147_mainStep(num, workingKey[0]);
Gost28147Engine.intTobytes(num, outBytes, outOff);
Gost28147Engine.intTobytes(num2, outBytes, outOff + 4);
}
public static IBufferedCipher GetCipher(
string algorithm)
{
if (algorithm == null)
throw new ArgumentNullException("algorithm");
algorithm = Platform.ToUpperInvariant(algorithm);
{
string aliased = (string) algorithms[algorithm];
if (aliased != null)
algorithm = aliased;
}
IBasicAgreement iesAgreement = null;
if (algorithm == "IES")
{
iesAgreement = new DHBasicAgreement();
}
else if (algorithm == "ECIES")
{
iesAgreement = new ECDHBasicAgreement();
}
if (iesAgreement != null)
{
return new BufferedIesCipher(
new IesEngine(
iesAgreement,
new Kdf2BytesGenerator(
new Sha1Digest()),
new HMac(
new Sha1Digest())));
}
if (algorithm.StartsWith("PBE"))
{
if (algorithm.EndsWith("-CBC"))
{
if (algorithm == "PBEWITHSHA1ANDDES-CBC")
{
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new DesEngine()));
}
else if (algorithm == "PBEWITHSHA1ANDRC2-CBC")
{
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new RC2Engine()));
}
else if (Strings.IsOneOf(algorithm,
"PBEWITHSHAAND2-KEYTRIPLEDES-CBC", "PBEWITHSHAAND3-KEYTRIPLEDES-CBC"))
{
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new DesEdeEngine()));
}
else if (Strings.IsOneOf(algorithm,
"PBEWITHSHAAND128BITRC2-CBC", "PBEWITHSHAAND40BITRC2-CBC"))
{
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new RC2Engine()));
}
}
else if (algorithm.EndsWith("-BC") || algorithm.EndsWith("-OPENSSL"))
{
if (Strings.IsOneOf(algorithm,
"PBEWITHSHAAND128BITAES-CBC-BC",
"PBEWITHSHAAND192BITAES-CBC-BC",
"PBEWITHSHAAND256BITAES-CBC-BC",
"PBEWITHSHA256AND128BITAES-CBC-BC",
"PBEWITHSHA256AND192BITAES-CBC-BC",
"PBEWITHSHA256AND256BITAES-CBC-BC",
"PBEWITHMD5AND128BITAES-CBC-OPENSSL",
"PBEWITHMD5AND192BITAES-CBC-OPENSSL",
"PBEWITHMD5AND256BITAES-CBC-OPENSSL"))
{
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new AesFastEngine()));
}
}
}
string[] parts = algorithm.Split('/');
IBlockCipher blockCipher = null;
IAsymmetricBlockCipher asymBlockCipher = null;
IStreamCipher streamCipher = null;
string algorithmName = parts[0];
{
string aliased = (string)algorithms[algorithmName];
if (aliased != null)
algorithmName = aliased;
}
CipherAlgorithm cipherAlgorithm;
try
{
cipherAlgorithm = (CipherAlgorithm)Enums.GetEnumValue(typeof(CipherAlgorithm), algorithmName);
}
catch (ArgumentException)
{
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
switch (cipherAlgorithm)
{
case CipherAlgorithm.AES:
blockCipher = new AesFastEngine();
break;
case CipherAlgorithm.ARC4:
streamCipher = new RC4Engine();
break;
case CipherAlgorithm.BLOWFISH:
blockCipher = new BlowfishEngine();
break;
case CipherAlgorithm.CAMELLIA:
blockCipher = new CamelliaEngine();
break;
case CipherAlgorithm.CAST5:
blockCipher = new Cast5Engine();
break;
case CipherAlgorithm.CAST6:
blockCipher = new Cast6Engine();
break;
case CipherAlgorithm.DES:
blockCipher = new DesEngine();
break;
case CipherAlgorithm.DESEDE:
blockCipher = new DesEdeEngine();
break;
case CipherAlgorithm.ELGAMAL:
asymBlockCipher = new ElGamalEngine();
break;
case CipherAlgorithm.GOST28147:
blockCipher = new Gost28147Engine();
break;
case CipherAlgorithm.HC128:
streamCipher = new HC128Engine();
break;
case CipherAlgorithm.HC256:
streamCipher = new HC256Engine();
break;
case CipherAlgorithm.IDEA:
blockCipher = new IdeaEngine();
break;
case CipherAlgorithm.NOEKEON:
blockCipher = new NoekeonEngine();
break;
case CipherAlgorithm.PBEWITHSHAAND128BITRC4:
case CipherAlgorithm.PBEWITHSHAAND40BITRC4:
streamCipher = new RC4Engine();
break;
case CipherAlgorithm.RC2:
blockCipher = new RC2Engine();
break;
case CipherAlgorithm.RC5:
blockCipher = new RC532Engine();
break;
case CipherAlgorithm.RC5_64:
blockCipher = new RC564Engine();
break;
case CipherAlgorithm.RC6:
blockCipher = new RC6Engine();
break;
case CipherAlgorithm.RIJNDAEL:
blockCipher = new RijndaelEngine();
break;
case CipherAlgorithm.RSA:
asymBlockCipher = new RsaBlindedEngine();
break;
case CipherAlgorithm.SALSA20:
streamCipher = new Salsa20Engine();
break;
case CipherAlgorithm.SEED:
blockCipher = new SeedEngine();
break;
case CipherAlgorithm.SERPENT:
blockCipher = new SerpentEngine();
break;
case CipherAlgorithm.SKIPJACK:
blockCipher = new SkipjackEngine();
break;
case CipherAlgorithm.TEA:
blockCipher = new TeaEngine();
break;
case CipherAlgorithm.TWOFISH:
blockCipher = new TwofishEngine();
break;
case CipherAlgorithm.VMPC:
streamCipher = new VmpcEngine();
break;
case CipherAlgorithm.VMPC_KSA3:
streamCipher = new VmpcKsa3Engine();
break;
case CipherAlgorithm.XTEA:
blockCipher = new XteaEngine();
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
if (streamCipher != null)
{
if (parts.Length > 1)
throw new ArgumentException("Modes and paddings not used for stream ciphers");
return new BufferedStreamCipher(streamCipher);
}
bool cts = false;
bool padded = true;
IBlockCipherPadding padding = null;
IAeadBlockCipher aeadBlockCipher = null;
if (parts.Length > 2)
{
if (streamCipher != null)
throw new ArgumentException("Paddings not used for stream ciphers");
string paddingName = parts[2];
CipherPadding cipherPadding;
if (paddingName == "")
{
cipherPadding = CipherPadding.RAW;
}
else if (paddingName == "X9.23PADDING")
{
cipherPadding = CipherPadding.X923PADDING;
}
else
{
try
{
cipherPadding = (CipherPadding)Enums.GetEnumValue(typeof(CipherPadding), paddingName);
}
catch (ArgumentException)
{
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
switch (cipherPadding)
{
case CipherPadding.NOPADDING:
padded = false;
break;
case CipherPadding.RAW:
break;
case CipherPadding.ISO10126PADDING:
case CipherPadding.ISO10126D2PADDING:
case CipherPadding.ISO10126_2PADDING:
padding = new ISO10126d2Padding();
break;
case CipherPadding.ISO7816_4PADDING:
case CipherPadding.ISO9797_1PADDING:
padding = new ISO7816d4Padding();
break;
case CipherPadding.ISO9796_1:
case CipherPadding.ISO9796_1PADDING:
asymBlockCipher = new ISO9796d1Encoding(asymBlockCipher);
break;
case CipherPadding.OAEP:
case CipherPadding.OAEPPADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher);
break;
case CipherPadding.OAEPWITHMD5ANDMGF1PADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher, new MD5Digest());
break;
case CipherPadding.OAEPWITHSHA1ANDMGF1PADDING:
case CipherPadding.OAEPWITHSHA_1ANDMGF1PADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha1Digest());
break;
case CipherPadding.OAEPWITHSHA224ANDMGF1PADDING:
case CipherPadding.OAEPWITHSHA_224ANDMGF1PADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha224Digest());
break;
case CipherPadding.OAEPWITHSHA256ANDMGF1PADDING:
case CipherPadding.OAEPWITHSHA_256ANDMGF1PADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha256Digest());
break;
case CipherPadding.OAEPWITHSHA384ANDMGF1PADDING:
case CipherPadding.OAEPWITHSHA_384ANDMGF1PADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha384Digest());
break;
case CipherPadding.OAEPWITHSHA512ANDMGF1PADDING:
case CipherPadding.OAEPWITHSHA_512ANDMGF1PADDING:
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha512Digest());
break;
case CipherPadding.PKCS1:
case CipherPadding.PKCS1PADDING:
asymBlockCipher = new Pkcs1Encoding(asymBlockCipher);
break;
case CipherPadding.PKCS5:
case CipherPadding.PKCS5PADDING:
case CipherPadding.PKCS7:
case CipherPadding.PKCS7PADDING:
padding = new Pkcs7Padding();
break;
case CipherPadding.TBCPADDING:
padding = new TbcPadding();
break;
case CipherPadding.WITHCTS:
cts = true;
break;
case CipherPadding.X923PADDING:
padding = new X923Padding();
break;
case CipherPadding.ZEROBYTEPADDING:
padding = new ZeroBytePadding();
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
string mode = "";
if (parts.Length > 1)
{
mode = parts[1];
int di = GetDigitIndex(mode);
string modeName = di >= 0 ? mode.Substring(0, di) : mode;
try
{
CipherMode cipherMode = modeName == ""
? CipherMode.NONE
: (CipherMode)Enums.GetEnumValue(typeof(CipherMode), modeName);
switch (cipherMode)
{
case CipherMode.ECB:
case CipherMode.NONE:
break;
case CipherMode.CBC:
blockCipher = new CbcBlockCipher(blockCipher);
break;
case CipherMode.CCM:
aeadBlockCipher = new CcmBlockCipher(blockCipher);
break;
case CipherMode.CFB:
{
int bits = (di < 0)
? 8 * blockCipher.GetBlockSize()
: int.Parse(mode.Substring(di));
blockCipher = new CfbBlockCipher(blockCipher, bits);
break;
}
case CipherMode.CTR:
blockCipher = new SicBlockCipher(blockCipher);
break;
case CipherMode.CTS:
cts = true;
blockCipher = new CbcBlockCipher(blockCipher);
break;
case CipherMode.EAX:
aeadBlockCipher = new EaxBlockCipher(blockCipher);
break;
case CipherMode.GCM:
aeadBlockCipher = new GcmBlockCipher(blockCipher);
break;
case CipherMode.GOFB:
blockCipher = new GOfbBlockCipher(blockCipher);
break;
case CipherMode.OCB:
aeadBlockCipher = new OcbBlockCipher(blockCipher, CreateBlockCipher(cipherAlgorithm));
break;
case CipherMode.OFB:
{
int bits = (di < 0)
? 8 * blockCipher.GetBlockSize()
: int.Parse(mode.Substring(di));
blockCipher = new OfbBlockCipher(blockCipher, bits);
break;
}
case CipherMode.OPENPGPCFB:
blockCipher = new OpenPgpCfbBlockCipher(blockCipher);
break;
case CipherMode.SIC:
if (blockCipher.GetBlockSize() < 16)
{
throw new ArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
}
blockCipher = new SicBlockCipher(blockCipher);
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
catch (ArgumentException)
{
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
if (aeadBlockCipher != null)
{
if (cts)
throw new SecurityUtilityException("CTS mode not valid for AEAD ciphers.");
if (padded && parts.Length > 2 && parts[2] != "")
throw new SecurityUtilityException("Bad padding specified for AEAD cipher.");
return new BufferedAeadBlockCipher(aeadBlockCipher);
}
if (blockCipher != null)
{
if (cts)
{
return new CtsBlockCipher(blockCipher);
}
if (padding != null)
{
return new PaddedBufferedBlockCipher(blockCipher, padding);
}
if (!padded || blockCipher.IsPartialBlockOkay)
{
return new BufferedBlockCipher(blockCipher);
}
return new PaddedBufferedBlockCipher(blockCipher);
}
if (asymBlockCipher != null)
{
return new BufferedAsymmetricBlockCipher(asymBlockCipher);
}
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
public static IBufferedCipher GetCipher(
string algorithm)
{
if (algorithm == null)
throw new ArgumentNullException("algorithm");
algorithm = algorithm.ToUpper(CultureInfo.InvariantCulture);
string aliased = (string) algorithms[algorithm];
if (aliased != null)
algorithm = aliased;
IBasicAgreement iesAgreement = null;
if (algorithm == "IES")
{
iesAgreement = new DHBasicAgreement();
}
else if (algorithm == "ECIES")
{
iesAgreement = new ECDHBasicAgreement();
}
if (iesAgreement != null)
{
return new BufferedIesCipher(
new IesEngine(
iesAgreement,
new Kdf2BytesGenerator(
new Sha1Digest()),
new HMac(
new Sha1Digest())));
}
if (algorithm.StartsWith("PBE"))
{
switch (algorithm)
{
case "PBEWITHSHAAND2-KEYTRIPLEDES-CBC":
case "PBEWITHSHAAND3-KEYTRIPLEDES-CBC":
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new DesEdeEngine()));
case "PBEWITHSHAAND128BITRC2-CBC":
case "PBEWITHSHAAND40BITRC2-CBC":
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new RC2Engine()));
case "PBEWITHSHAAND128BITAES-CBC-BC":
case "PBEWITHSHAAND192BITAES-CBC-BC":
case "PBEWITHSHAAND256BITAES-CBC-BC":
case "PBEWITHSHA256AND128BITAES-CBC-BC":
case "PBEWITHSHA256AND192BITAES-CBC-BC":
case "PBEWITHSHA256AND256BITAES-CBC-BC":
case "PBEWITHMD5AND128BITAES-CBC-OPENSSL":
case "PBEWITHMD5AND192BITAES-CBC-OPENSSL":
case "PBEWITHMD5AND256BITAES-CBC-OPENSSL":
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new AesFastEngine()));
case "PBEWITHSHA1ANDDES-CBC":
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new DesEngine()));
case "PBEWITHSHA1ANDRC2-CBC":
return new PaddedBufferedBlockCipher(
new CbcBlockCipher(new RC2Engine()));
}
}
string[] parts = algorithm.Split('/');
IBlockCipher blockCipher = null;
IAsymmetricBlockCipher asymBlockCipher = null;
IStreamCipher streamCipher = null;
switch (parts[0])
{
case "AES":
blockCipher = new AesFastEngine();
break;
case "ARC4":
streamCipher = new RC4Engine();
break;
case "BLOWFISH":
blockCipher = new BlowfishEngine();
break;
case "CAMELLIA":
blockCipher = new CamelliaEngine();
break;
case "CAST5":
blockCipher = new Cast5Engine();
break;
case "CAST6":
blockCipher = new Cast6Engine();
break;
case "DES":
blockCipher = new DesEngine();
break;
case "DESEDE":
blockCipher = new DesEdeEngine();
break;
case "ELGAMAL":
asymBlockCipher = new ElGamalEngine();
break;
case "GOST28147":
blockCipher = new Gost28147Engine();
break;
case "HC128":
streamCipher = new HC128Engine();
break;
case "HC256":
streamCipher = new HC256Engine();
break;
#if INCLUDE_IDEA
case "IDEA":
blockCipher = new IdeaEngine();
break;
#endif
case "NOEKEON":
blockCipher = new NoekeonEngine();
break;
case "PBEWITHSHAAND128BITRC4":
case "PBEWITHSHAAND40BITRC4":
streamCipher = new RC4Engine();
break;
case "RC2":
blockCipher = new RC2Engine();
break;
case "RC5":
blockCipher = new RC532Engine();
break;
case "RC5-64":
blockCipher = new RC564Engine();
break;
case "RC6":
blockCipher = new RC6Engine();
break;
case "RIJNDAEL":
blockCipher = new RijndaelEngine();
break;
case "RSA":
asymBlockCipher = new RsaBlindedEngine();
break;
case "SALSA20":
streamCipher = new Salsa20Engine();
break;
case "SEED":
blockCipher = new SeedEngine();
break;
case "SERPENT":
blockCipher = new SerpentEngine();
break;
case "SKIPJACK":
blockCipher = new SkipjackEngine();
break;
case "TEA":
blockCipher = new TeaEngine();
break;
case "TWOFISH":
blockCipher = new TwofishEngine();
break;
case "VMPC":
streamCipher = new VmpcEngine();
break;
case "VMPC-KSA3":
streamCipher = new VmpcKsa3Engine();
break;
case "XTEA":
blockCipher = new XteaEngine();
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
if (streamCipher != null)
{
if (parts.Length > 1)
throw new ArgumentException("Modes and paddings not used for stream ciphers");
return new BufferedStreamCipher(streamCipher);
}
bool cts = false;
bool padded = true;
IBlockCipherPadding padding = null;
IAeadBlockCipher aeadBlockCipher = null;
if (parts.Length > 2)
{
if (streamCipher != null)
throw new ArgumentException("Paddings not used for stream ciphers");
switch (parts[2])
{
case "NOPADDING":
padded = false;
break;
case "":
case "RAW":
break;
case "ISO10126PADDING":
case "ISO10126D2PADDING":
case "ISO10126-2PADDING":
padding = new ISO10126d2Padding();
break;
case "ISO7816-4PADDING":
case "ISO9797-1PADDING":
padding = new ISO7816d4Padding();
break;
case "ISO9796-1":
case "ISO9796-1PADDING":
asymBlockCipher = new ISO9796d1Encoding(asymBlockCipher);
break;
case "OAEP":
case "OAEPPADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher);
break;
case "OAEPWITHMD5ANDMGF1PADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher, new MD5Digest());
break;
case "OAEPWITHSHA1ANDMGF1PADDING":
case "OAEPWITHSHA-1ANDMGF1PADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha1Digest());
break;
case "OAEPWITHSHA224ANDMGF1PADDING":
case "OAEPWITHSHA-224ANDMGF1PADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha224Digest());
break;
case "OAEPWITHSHA256ANDMGF1PADDING":
case "OAEPWITHSHA-256ANDMGF1PADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha256Digest());
break;
case "OAEPWITHSHA384ANDMGF1PADDING":
case "OAEPWITHSHA-384ANDMGF1PADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha384Digest());
break;
case "OAEPWITHSHA512ANDMGF1PADDING":
case "OAEPWITHSHA-512ANDMGF1PADDING":
asymBlockCipher = new OaepEncoding(asymBlockCipher, new Sha512Digest());
break;
case "PKCS1":
case "PKCS1PADDING":
asymBlockCipher = new Pkcs1Encoding(asymBlockCipher);
break;
case "PKCS5":
case "PKCS5PADDING":
case "PKCS7":
case "PKCS7PADDING":
padding = new Pkcs7Padding();
break;
case "TBCPADDING":
padding = new TbcPadding();
break;
case "WITHCTS":
cts = true;
break;
case "X9.23PADDING":
case "X923PADDING":
padding = new X923Padding();
break;
case "ZEROBYTEPADDING":
padding = new ZeroBytePadding();
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
string mode = "";
if (parts.Length > 1)
{
mode = parts[1];
int di = GetDigitIndex(mode);
string modeName = di >= 0 ? mode.Substring(0, di) : mode;
switch (modeName)
{
case "":
case "ECB":
case "NONE":
break;
case "CBC":
blockCipher = new CbcBlockCipher(blockCipher);
break;
case "CCM":
aeadBlockCipher = new CcmBlockCipher(blockCipher);
break;
case "CFB":
{
int bits = (di < 0)
? 8 * blockCipher.GetBlockSize()
: int.Parse(mode.Substring(di));
blockCipher = new CfbBlockCipher(blockCipher, bits);
break;
}
case "CTR":
blockCipher = new SicBlockCipher(blockCipher);
break;
case "CTS":
cts = true;
blockCipher = new CbcBlockCipher(blockCipher);
break;
case "EAX":
aeadBlockCipher = new EaxBlockCipher(blockCipher);
break;
case "GCM":
aeadBlockCipher = new GcmBlockCipher(blockCipher);
break;
case "GOFB":
blockCipher = new GOfbBlockCipher(blockCipher);
break;
case "OFB":
{
int bits = (di < 0)
? 8 * blockCipher.GetBlockSize()
: int.Parse(mode.Substring(di));
blockCipher = new OfbBlockCipher(blockCipher, bits);
break;
}
case "OPENPGPCFB":
blockCipher = new OpenPgpCfbBlockCipher(blockCipher);
break;
case "SIC":
if (blockCipher.GetBlockSize() < 16)
{
throw new ArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
}
blockCipher = new SicBlockCipher(blockCipher);
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
if (aeadBlockCipher != null)
{
if (cts)
throw new SecurityUtilityException("CTS mode not valid for AEAD ciphers.");
if (padded && parts.Length > 2 && parts[2] != "")
throw new SecurityUtilityException("Bad padding specified for AEAD cipher.");
return new BufferedAeadBlockCipher(aeadBlockCipher);
}
if (blockCipher != null)
{
if (cts)
{
return new CtsBlockCipher(blockCipher);
}
if (padding != null)
{
return new PaddedBufferedBlockCipher(blockCipher, padding);
}
if (!padded || blockCipher.IsPartialBlockOkay)
{
return new BufferedBlockCipher(blockCipher);
}
return new PaddedBufferedBlockCipher(blockCipher);
}
if (asymBlockCipher != null)
{
return new BufferedAsymmetricBlockCipher(asymBlockCipher);
}
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
static Gost28147Engine()
{
Gost28147Engine.Sbox_Default = new byte[]
{
4,
10,
9,
2,
13,
8,
0,
14,
6,
11,
1,
12,
7,
15,
5,
3,
14,
11,
4,
12,
6,
13,
15,
10,
2,
3,
8,
1,
0,
7,
5,
9,
5,
8,
1,
13,
10,
3,
4,
2,
14,
15,
12,
7,
6,
0,
9,
11,
7,
13,
10,
1,
0,
8,
9,
15,
14,
4,
6,
12,
11,
2,
5,
3,
6,
12,
7,
1,
5,
15,
13,
8,
4,
10,
9,
14,
0,
3,
11,
2,
4,
11,
10,
0,
7,
2,
1,
13,
3,
6,
8,
5,
9,
12,
15,
14,
13,
11,
4,
1,
3,
15,
5,
9,
0,
10,
14,
7,
6,
8,
2,
12,
1,
15,
13,
0,
5,
7,
10,
4,
9,
2,
3,
14,
6,
11,
8,
12
};
Gost28147Engine.ESbox_Test = new byte[]
{
4,
2,
15,
5,
9,
1,
0,
8,
14,
3,
11,
12,
13,
7,
10,
6,
12,
9,
15,
14,
8,
1,
3,
10,
2,
7,
4,
13,
6,
0,
11,
5,
13,
8,
14,
12,
7,
3,
9,
10,
1,
5,
2,
4,
6,
15,
0,
11,
14,
9,
11,
2,
5,
15,
7,
1,
0,
13,
12,
6,
10,
4,
3,
8,
3,
14,
5,
9,
6,
8,
0,
13,
10,
11,
7,
12,
2,
1,
15,
4,
8,
15,
6,
11,
1,
9,
12,
5,
13,
3,
7,
10,
0,
14,
2,
4,
9,
11,
12,
0,
3,
6,
7,
5,
4,
8,
14,
15,
1,
10,
2,
13,
12,
6,
5,
2,
11,
0,
9,
13,
3,
14,
7,
10,
15,
4,
1,
8
};
Gost28147Engine.ESbox_A = new byte[]
{
9,
6,
3,
2,
8,
11,
1,
7,
10,
4,
14,
15,
12,
0,
13,
5,
3,
7,
14,
9,
8,
10,
15,
0,
5,
2,
6,
12,
11,
4,
13,
1,
14,
4,
6,
2,
11,
3,
13,
8,
12,
15,
5,
10,
0,
7,
1,
9,
14,
7,
10,
12,
13,
1,
3,
9,
0,
2,
11,
4,
15,
8,
5,
6,
11,
5,
1,
9,
8,
13,
15,
0,
14,
4,
2,
3,
12,
7,
10,
6,
3,
10,
13,
12,
1,
2,
0,
11,
7,
5,
9,
4,
8,
15,
14,
6,
1,
13,
2,
9,
7,
10,
6,
0,
8,
12,
4,
5,
15,
3,
11,
14,
11,
10,
15,
5,
0,
12,
14,
8,
6,
2,
3,
9,
1,
7,
13,
4
};
Gost28147Engine.ESbox_B = new byte[]
{
8,
4,
11,
1,
3,
5,
0,
9,
2,
14,
10,
12,
13,
6,
7,
15,
0,
1,
2,
10,
4,
13,
5,
12,
9,
7,
3,
15,
11,
8,
6,
14,
14,
12,
0,
10,
9,
2,
13,
11,
7,
5,
8,
15,
3,
6,
1,
4,
7,
5,
0,
13,
11,
6,
1,
2,
3,
10,
12,
15,
4,
14,
9,
8,
2,
7,
12,
15,
9,
5,
10,
11,
1,
4,
0,
13,
6,
8,
14,
3,
8,
3,
2,
6,
4,
13,
14,
11,
12,
1,
7,
15,
10,
0,
9,
5,
5,
2,
10,
11,
9,
1,
12,
3,
7,
4,
13,
0,
6,
15,
8,
14,
0,
4,
11,
14,
8,
3,
7,
1,
10,
2,
9,
6,
15,
13,
5,
12
};
Gost28147Engine.ESbox_C = new byte[]
{
1,
11,
12,
2,
9,
13,
0,
15,
4,
5,
8,
14,
10,
7,
6,
3,
0,
1,
7,
13,
11,
4,
5,
2,
8,
14,
15,
12,
9,
10,
6,
3,
8,
2,
5,
0,
4,
9,
15,
10,
3,
7,
12,
13,
6,
14,
1,
11,
3,
6,
0,
1,
5,
13,
10,
8,
11,
2,
9,
7,
14,
15,
12,
4,
8,
13,
11,
0,
4,
5,
1,
2,
9,
3,
12,
14,
6,
15,
10,
7,
12,
9,
11,
1,
8,
14,
2,
4,
7,
3,
6,
5,
10,
0,
15,
13,
10,
9,
6,
8,
13,
14,
2,
0,
15,
3,
5,
11,
4,
1,
12,
7,
7,
4,
0,
5,
10,
2,
15,
14,
12,
6,
1,
11,
13,
9,
3,
8
};
Gost28147Engine.ESbox_D = new byte[]
{
15,
12,
2,
10,
6,
4,
5,
0,
7,
9,
14,
13,
1,
11,
8,
3,
11,
6,
3,
4,
12,
15,
14,
2,
7,
13,
8,
0,
5,
10,
9,
1,
1,
12,
11,
0,
15,
14,
6,
5,
10,
13,
4,
8,
9,
3,
7,
2,
1,
5,
14,
12,
10,
7,
0,
13,
6,
2,
11,
4,
9,
3,
15,
8,
0,
12,
8,
9,
13,
2,
10,
11,
7,
3,
6,
5,
4,
14,
15,
1,
8,
0,
15,
3,
2,
5,
14,
11,
1,
10,
4,
7,
12,
9,
13,
6,
3,
0,
6,
15,
1,
14,
9,
2,
13,
8,
12,
4,
11,
10,
5,
7,
1,
10,
6,
8,
15,
11,
0,
4,
12,
3,
5,
9,
7,
13,
2,
14
};
Gost28147Engine.DSbox_Test = new byte[]
{
4,
10,
9,
2,
13,
8,
0,
14,
6,
11,
1,
12,
7,
15,
5,
3,
14,
11,
4,
12,
6,
13,
15,
10,
2,
3,
8,
1,
0,
7,
5,
9,
5,
8,
1,
13,
10,
3,
4,
2,
14,
15,
12,
7,
6,
0,
9,
11,
7,
13,
10,
1,
0,
8,
9,
15,
14,
4,
6,
12,
11,
2,
5,
3,
6,
12,
7,
1,
5,
15,
13,
8,
4,
10,
9,
14,
0,
3,
11,
2,
4,
11,
10,
0,
7,
2,
1,
13,
3,
6,
8,
5,
9,
12,
15,
14,
13,
11,
4,
1,
3,
15,
5,
9,
0,
10,
14,
7,
6,
8,
2,
12,
1,
15,
13,
0,
5,
7,
10,
4,
9,
2,
3,
14,
6,
11,
8,
12
};
Gost28147Engine.DSbox_A = new byte[]
{
10,
4,
5,
6,
8,
1,
3,
7,
13,
12,
14,
0,
9,
2,
11,
15,
5,
15,
4,
0,
2,
13,
11,
9,
1,
7,
6,
3,
12,
14,
10,
8,
7,
15,
12,
14,
9,
4,
1,
0,
3,
11,
5,
2,
6,
10,
8,
13,
4,
10,
7,
12,
0,
15,
2,
8,
14,
1,
6,
5,
13,
11,
9,
3,
7,
6,
4,
11,
9,
12,
2,
10,
1,
8,
0,
14,
15,
13,
3,
5,
7,
6,
2,
4,
13,
9,
15,
0,
10,
1,
5,
11,
8,
14,
12,
3,
13,
14,
4,
1,
7,
0,
5,
10,
3,
12,
8,
15,
6,
2,
9,
11,
1,
3,
10,
9,
5,
11,
4,
15,
8,
6,
7,
14,
13,
0,
2,
12
};
Gost28147Engine.sBoxes = Platform.CreateHashtable();
Gost28147Engine.AddSBox("Default", Gost28147Engine.Sbox_Default);
Gost28147Engine.AddSBox("E-TEST", Gost28147Engine.ESbox_Test);
Gost28147Engine.AddSBox("E-A", Gost28147Engine.ESbox_A);
Gost28147Engine.AddSBox("E-B", Gost28147Engine.ESbox_B);
Gost28147Engine.AddSBox("E-C", Gost28147Engine.ESbox_C);
Gost28147Engine.AddSBox("E-D", Gost28147Engine.ESbox_D);
Gost28147Engine.AddSBox("D-TEST", Gost28147Engine.DSbox_Test);
Gost28147Engine.AddSBox("D-A", Gost28147Engine.DSbox_A);
}
private BufferedBlockCipher CreateScryptoEngine()
{
IBlockCipher engine;
switch (_MSec.Algorithm)
{
case ESec.SCRYPTO_AES:
engine = new AesEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_AESFAST:
engine = new AesFastEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_AESLIGHT:
engine = new AesLightEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_BLOWFISH:
engine = new BlowfishEngine();
_MSec.KeySize = 56;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAMELLIA:
engine = new CamelliaEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAMELLIALIGHT:
engine = new CamelliaLightEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAST5:
engine = new Cast5Engine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAST6:
engine = new Cast6Engine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_DES:
engine = new DesEngine();
_MSec.KeySize = 8;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_DESEDE:
engine = new DesEdeEngine();
_MSec.KeySize = 24;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_GOST28147:
engine = new Gost28147Engine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_NOEKEON:
engine = new NoekeonEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_NULL:
engine = new NullEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 16;
break;
case ESec.SCRYPTO_RC2:
engine = new RC2Engine();
_MSec.KeySize = 128;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RC532:
engine = new RC532Engine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RC564:
engine = new RC564Engine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RC6:
engine = new RC6Engine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RIJNDAEL:
engine = new RijndaelEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_SEED:
engine = new SeedEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_SERPENT:
engine = new SerpentEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_SKIPJACK:
engine = new SkipjackEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_TEA:
engine = new TeaEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_TWOFISH:
engine = new TwofishEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_XTEA:
engine = new XteaEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
default:
engine = new AesEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
}
switch (_MSec.Mode)
{
case ESec.MODE_CBC:
engine = new CbcBlockCipher(engine);
break;
case ESec.MODE_CFB:
engine = new CfbBlockCipher(engine, 8);
break;
case ESec.MODE_GOFB:
engine = new GOfbBlockCipher(engine);
break;
case ESec.MODE_OFB:
engine = new OfbBlockCipher(engine, 8);
break;
case ESec.MODE_OPENPGPCFB:
engine = new OpenPgpCfbBlockCipher(engine);
break;
case ESec.MODE_SIC:
engine = new SicBlockCipher(engine);
break;
default:
engine = new CbcBlockCipher(engine);
break;
}
IBlockCipherPadding padding = null;
switch (_MSec.Padding)
{
case ESec.PADDING_ISO10126d2:
padding = new ISO10126d2Padding();
break;
case ESec.PADDING_ISO7816d4:
padding = new ISO7816d4Padding();
break;
case ESec.PADDING_PKCS7:
padding = new Pkcs7Padding();
break;
case ESec.PADDING_TBC:
padding = new TbcPadding();
break;
case ESec.PADDING_X923:
padding = new X923Padding();
break;
case ESec.PADDING_ZEROBYTE:
padding = new ZeroBytePadding();
break;
default:
padding = new Pkcs7Padding();
break;
}
return new PaddedBufferedBlockCipher(engine, padding);
}
