private int processBlock192or256(byte[] input, int inOff, byte[] output, int outOff)
{
for (int i = 0; i < 4; i++)
{
this.state[i] = CamelliaEngine.bytes2uint(input, inOff + i * 4);
this.state[i] ^= this.kw[i];
}
CamelliaEngine.camelliaF2(this.state, this.subkey, 0);
CamelliaEngine.camelliaF2(this.state, this.subkey, 4);
CamelliaEngine.camelliaF2(this.state, this.subkey, 8);
CamelliaEngine.camelliaFLs(this.state, this.ke, 0);
CamelliaEngine.camelliaF2(this.state, this.subkey, 12);
CamelliaEngine.camelliaF2(this.state, this.subkey, 16);
CamelliaEngine.camelliaF2(this.state, this.subkey, 20);
CamelliaEngine.camelliaFLs(this.state, this.ke, 4);
CamelliaEngine.camelliaF2(this.state, this.subkey, 24);
CamelliaEngine.camelliaF2(this.state, this.subkey, 28);
CamelliaEngine.camelliaF2(this.state, this.subkey, 32);
CamelliaEngine.camelliaFLs(this.state, this.ke, 8);
CamelliaEngine.camelliaF2(this.state, this.subkey, 36);
CamelliaEngine.camelliaF2(this.state, this.subkey, 40);
CamelliaEngine.camelliaF2(this.state, this.subkey, 44);
this.state[2] ^= this.kw[4];
this.state[3] ^= this.kw[5];
this.state[0] ^= this.kw[6];
this.state[1] ^= this.kw[7];
CamelliaEngine.uint2bytes(this.state[2], output, outOff);
CamelliaEngine.uint2bytes(this.state[3], output, outOff + 4);
CamelliaEngine.uint2bytes(this.state[0], output, outOff + 8);
CamelliaEngine.uint2bytes(this.state[1], output, outOff + 12);
return(16);
}
private static void camelliaFLs(uint[] s, uint[] fkey, int keyoff)
{
s[1] ^= CamelliaEngine.leftRotate(s[0] & fkey[keyoff], 1);
s[0] ^= (fkey[1 + keyoff] | s[1]);
s[2] ^= (fkey[3 + keyoff] | s[3]);
s[3] ^= CamelliaEngine.leftRotate(fkey[2 + keyoff] & s[2], 1);
}
private static void camelliaF2(uint[] s, uint[] skey, int keyoff)
{
uint num = s[0] ^ skey[keyoff];
uint num2 = CamelliaEngine.SBOX4_4404[(int)((byte)num)];
num2 ^= CamelliaEngine.SBOX3_3033[(int)((byte)(num >> 8))];
num2 ^= CamelliaEngine.SBOX2_0222[(int)((byte)(num >> 16))];
num2 ^= CamelliaEngine.SBOX1_1110[(int)((byte)(num >> 24))];
uint num3 = s[1] ^ skey[1 + keyoff];
uint num4 = CamelliaEngine.SBOX1_1110[(int)((byte)num3)];
num4 ^= CamelliaEngine.SBOX4_4404[(int)((byte)(num3 >> 8))];
num4 ^= CamelliaEngine.SBOX3_3033[(int)((byte)(num3 >> 16))];
num4 ^= CamelliaEngine.SBOX2_0222[(int)((byte)(num3 >> 24))];
s[2] ^= (num2 ^ num4);
s[3] ^= (num2 ^ num4 ^ CamelliaEngine.rightRotate(num2, 8));
num = (s[2] ^ skey[2 + keyoff]);
num2 = CamelliaEngine.SBOX4_4404[(int)((byte)num)];
num2 ^= CamelliaEngine.SBOX3_3033[(int)((byte)(num >> 8))];
num2 ^= CamelliaEngine.SBOX2_0222[(int)((byte)(num >> 16))];
num2 ^= CamelliaEngine.SBOX1_1110[(int)((byte)(num >> 24))];
num3 = (s[3] ^ skey[3 + keyoff]);
num4 = CamelliaEngine.SBOX1_1110[(int)((byte)num3)];
num4 ^= CamelliaEngine.SBOX4_4404[(int)((byte)(num3 >> 8))];
num4 ^= CamelliaEngine.SBOX3_3033[(int)((byte)(num3 >> 16))];
num4 ^= CamelliaEngine.SBOX2_0222[(int)((byte)(num3 >> 24))];
s[0] ^= (num2 ^ num4);
s[1] ^= (num2 ^ num4 ^ CamelliaEngine.rightRotate(num2, 8));
}
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.");
}
private void setKey(bool forEncryption, byte[] key)
{
uint[] array = new uint[8];
uint[] array2 = new uint[4];
uint[] array3 = new uint[4];
uint[] array4 = new uint[4];
int num = key.Length;
if (num != 16)
{
if (num != 24)
{
if (num != 32)
{
throw new ArgumentException("key sizes are only 16/24/32 bytes.");
}
array[0] = CamelliaEngine.bytes2uint(key, 0);
array[1] = CamelliaEngine.bytes2uint(key, 4);
array[2] = CamelliaEngine.bytes2uint(key, 8);
array[3] = CamelliaEngine.bytes2uint(key, 12);
array[4] = CamelliaEngine.bytes2uint(key, 16);
array[5] = CamelliaEngine.bytes2uint(key, 20);
array[6] = CamelliaEngine.bytes2uint(key, 24);
array[7] = CamelliaEngine.bytes2uint(key, 28);
this._keyIs128 = false;
}
else
{
array[0] = CamelliaEngine.bytes2uint(key, 0);
array[1] = CamelliaEngine.bytes2uint(key, 4);
array[2] = CamelliaEngine.bytes2uint(key, 8);
array[3] = CamelliaEngine.bytes2uint(key, 12);
array[4] = CamelliaEngine.bytes2uint(key, 16);
array[5] = CamelliaEngine.bytes2uint(key, 20);
array[6] = ~array[4];
array[7] = ~array[5];
this._keyIs128 = false;
}
}
else
{
this._keyIs128 = true;
array[0] = CamelliaEngine.bytes2uint(key, 0);
array[1] = CamelliaEngine.bytes2uint(key, 4);
array[2] = CamelliaEngine.bytes2uint(key, 8);
array[3] = CamelliaEngine.bytes2uint(key, 12);
array[4] = (array[5] = (array[6] = (array[7] = 0u)));
}
for (int i = 0; i < 4; i++)
{
array2[i] = (array[i] ^ array[i + 4]);
}
CamelliaEngine.camelliaF2(array2, CamelliaEngine.SIGMA, 0);
for (int j = 0; j < 4; j++)
{
array2[j] ^= array[j];
}
CamelliaEngine.camelliaF2(array2, CamelliaEngine.SIGMA, 4);
if (this._keyIs128)
{
if (forEncryption)
{
this.kw[0] = array[0];
this.kw[1] = array[1];
this.kw[2] = array[2];
this.kw[3] = array[3];
CamelliaEngine.roldq(15, array, 0, this.subkey, 4);
CamelliaEngine.roldq(30, array, 0, this.subkey, 12);
CamelliaEngine.roldq(15, array, 0, array4, 0);
this.subkey[18] = array4[2];
this.subkey[19] = array4[3];
CamelliaEngine.roldq(17, array, 0, this.ke, 4);
CamelliaEngine.roldq(17, array, 0, this.subkey, 24);
CamelliaEngine.roldq(17, array, 0, this.subkey, 32);
this.subkey[0] = array2[0];
this.subkey[1] = array2[1];
this.subkey[2] = array2[2];
this.subkey[3] = array2[3];
CamelliaEngine.roldq(15, array2, 0, this.subkey, 8);
CamelliaEngine.roldq(15, array2, 0, this.ke, 0);
CamelliaEngine.roldq(15, array2, 0, array4, 0);
this.subkey[16] = array4[0];
this.subkey[17] = array4[1];
CamelliaEngine.roldq(15, array2, 0, this.subkey, 20);
CamelliaEngine.roldqo32(34, array2, 0, this.subkey, 28);
CamelliaEngine.roldq(17, array2, 0, this.kw, 4);
return;
}
this.kw[4] = array[0];
this.kw[5] = array[1];
this.kw[6] = array[2];
this.kw[7] = array[3];
CamelliaEngine.decroldq(15, array, 0, this.subkey, 28);
CamelliaEngine.decroldq(30, array, 0, this.subkey, 20);
CamelliaEngine.decroldq(15, array, 0, array4, 0);
this.subkey[16] = array4[0];
this.subkey[17] = array4[1];
CamelliaEngine.decroldq(17, array, 0, this.ke, 0);
CamelliaEngine.decroldq(17, array, 0, this.subkey, 8);
CamelliaEngine.decroldq(17, array, 0, this.subkey, 0);
this.subkey[34] = array2[0];
this.subkey[35] = array2[1];
this.subkey[32] = array2[2];
this.subkey[33] = array2[3];
CamelliaEngine.decroldq(15, array2, 0, this.subkey, 24);
CamelliaEngine.decroldq(15, array2, 0, this.ke, 4);
CamelliaEngine.decroldq(15, array2, 0, array4, 0);
this.subkey[18] = array4[2];
this.subkey[19] = array4[3];
CamelliaEngine.decroldq(15, array2, 0, this.subkey, 12);
CamelliaEngine.decroldqo32(34, array2, 0, this.subkey, 4);
CamelliaEngine.roldq(17, array2, 0, this.kw, 0);
return;
}
else
{
for (int k = 0; k < 4; k++)
{
array3[k] = (array2[k] ^ array[k + 4]);
}
CamelliaEngine.camelliaF2(array3, CamelliaEngine.SIGMA, 8);
if (forEncryption)
{
this.kw[0] = array[0];
this.kw[1] = array[1];
this.kw[2] = array[2];
this.kw[3] = array[3];
CamelliaEngine.roldqo32(45, array, 0, this.subkey, 16);
CamelliaEngine.roldq(15, array, 0, this.ke, 4);
CamelliaEngine.roldq(17, array, 0, this.subkey, 32);
CamelliaEngine.roldqo32(34, array, 0, this.subkey, 44);
CamelliaEngine.roldq(15, array, 4, this.subkey, 4);
CamelliaEngine.roldq(15, array, 4, this.ke, 0);
CamelliaEngine.roldq(30, array, 4, this.subkey, 24);
CamelliaEngine.roldqo32(34, array, 4, this.subkey, 36);
CamelliaEngine.roldq(15, array2, 0, this.subkey, 8);
CamelliaEngine.roldq(30, array2, 0, this.subkey, 20);
this.ke[8] = array2[1];
this.ke[9] = array2[2];
this.ke[10] = array2[3];
this.ke[11] = array2[0];
CamelliaEngine.roldqo32(49, array2, 0, this.subkey, 40);
this.subkey[0] = array3[0];
this.subkey[1] = array3[1];
this.subkey[2] = array3[2];
this.subkey[3] = array3[3];
CamelliaEngine.roldq(30, array3, 0, this.subkey, 12);
CamelliaEngine.roldq(30, array3, 0, this.subkey, 28);
CamelliaEngine.roldqo32(51, array3, 0, this.kw, 4);
return;
}
this.kw[4] = array[0];
this.kw[5] = array[1];
this.kw[6] = array[2];
this.kw[7] = array[3];
CamelliaEngine.decroldqo32(45, array, 0, this.subkey, 28);
CamelliaEngine.decroldq(15, array, 0, this.ke, 4);
CamelliaEngine.decroldq(17, array, 0, this.subkey, 12);
CamelliaEngine.decroldqo32(34, array, 0, this.subkey, 0);
CamelliaEngine.decroldq(15, array, 4, this.subkey, 40);
CamelliaEngine.decroldq(15, array, 4, this.ke, 8);
CamelliaEngine.decroldq(30, array, 4, this.subkey, 20);
CamelliaEngine.decroldqo32(34, array, 4, this.subkey, 8);
CamelliaEngine.decroldq(15, array2, 0, this.subkey, 36);
CamelliaEngine.decroldq(30, array2, 0, this.subkey, 24);
this.ke[2] = array2[1];
this.ke[3] = array2[2];
this.ke[0] = array2[3];
this.ke[1] = array2[0];
CamelliaEngine.decroldqo32(49, array2, 0, this.subkey, 4);
this.subkey[46] = array3[0];
this.subkey[47] = array3[1];
this.subkey[44] = array3[2];
this.subkey[45] = array3[3];
CamelliaEngine.decroldq(30, array3, 0, this.subkey, 32);
CamelliaEngine.decroldq(30, array3, 0, this.subkey, 16);
CamelliaEngine.roldqo32(51, array3, 0, this.kw, 0);
return;
}
}
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);
}
