public static object CreateEngine(
string algorithm)
{
string mechanism = (string)algorithms[algorithm.ToUpper(CultureInfo.InvariantCulture)];
if (mechanism.StartsWith("PBEwithSHA-1"))
{
if (mechanism.Equals("PBEwithSHA-1and128bitRC4"))
{
// return new RC4Engine();
return(CipherUtilities.GetCipher("RC4"));
}
else if (mechanism.Equals("PBEwithSHA-1and40bitRC4"))
{
// return new RC4Engine();
return(CipherUtilities.GetCipher("RC4"));
}
else if (mechanism.Equals("PBEwithSHA-1and3-keyDESEDE-CBC"))
{
// return new PaddedBufferedBlockCipher(new CbcBlockCipher(new DesEdeEngine()), new Pkcs7Padding());
return(CipherUtilities.GetCipher("DESEDE/CBC"));
}
else if (mechanism.Equals("PBEwithSHA-1and2-keyDESEDE-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new DesEdeEngine()), new Pkcs7Padding()));
}
else if (mechanism.Equals("PBEwithSHA-1and128bitRC2-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine()), new Pkcs7Padding()));
}
else if (mechanism.Equals("PBEwithSHA-1and40bitRC2-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine()), new Pkcs7Padding()));
}
else if (mechanism.Equals("PBEwithSHA-1andDES-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new DesEngine()), new Pkcs7Padding()));
}
else if (mechanism.Equals("PBEwithSHA-1andRC2-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine()), new Pkcs7Padding()));
}
}
else if (mechanism.StartsWith("PBEwithMD5"))
{
if (mechanism.Equals("PBEwithMD5andDES-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new DesEngine()), new Pkcs7Padding()));
}
else if (mechanism.Equals("PBEwithMD5andRC2-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine()), new Pkcs7Padding()));
}
}
else if (mechanism.StartsWith("PBEwithMD2"))
{
if (mechanism.Equals("PBEwithMD2andDES-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new DesEngine()), new Pkcs7Padding()));
}
else if (mechanism.Equals("PBEwithMD2andRC2-CBC"))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine()), new Pkcs7Padding()));
}
}
else if (mechanism.StartsWith("PBEwithHmac"))
{
if (mechanism.Equals("PBEwithHmacSHA-1"))
{
return(new HMac(new Sha1Digest()));
}
else if (mechanism.Equals("PBEwithHmacSHA-224"))
{
return(new HMac(new Sha224Digest()));
}
else if (mechanism.Equals("PBEwithHmacSHA-256"))
{
return(new HMac(new Sha256Digest()));
}
else if (mechanism.Equals("PBEwithHmacRipeMD128"))
{
return(new HMac(new RipeMD128Digest()));
}
else if (mechanism.Equals("PBEwithHmacRipeMD160"))
{
return(new HMac(new RipeMD160Digest()));
}
else if (mechanism.Equals("PBEwithHmacRipeMD256"))
{
return(new HMac(new RipeMD256Digest()));
}
}
return(null);
}
public static IBufferedCipher GetCipher(DerObjectIdentifier oid)
{
return(CipherUtilities.GetCipher(oid.Id));
}
public static IBufferedCipher GetCipher(string algorithm)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
algorithm = Platform.ToUpperInvariant(algorithm);
string text = (string)CipherUtilities.algorithms[algorithm];
if (text != null)
{
algorithm = text;
}
IBasicAgreement basicAgreement = null;
if (algorithm == "IES")
{
basicAgreement = new DHBasicAgreement();
}
else if (algorithm == "ECIES")
{
basicAgreement = new ECDHBasicAgreement();
}
if (basicAgreement != null)
{
return(new BufferedIesCipher(new IesEngine(basicAgreement, 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())));
}
if (algorithm == "PBEWITHSHA1ANDRC2-CBC")
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine())));
}
if (Strings.IsOneOf(algorithm, new string[]
{
"PBEWITHSHAAND2-KEYTRIPLEDES-CBC",
"PBEWITHSHAAND3-KEYTRIPLEDES-CBC"
}))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new DesEdeEngine())));
}
if (Strings.IsOneOf(algorithm, new string[]
{
"PBEWITHSHAAND128BITRC2-CBC",
"PBEWITHSHAAND40BITRC2-CBC"
}))
{
return(new PaddedBufferedBlockCipher(new CbcBlockCipher(new RC2Engine())));
}
}
else if ((algorithm.EndsWith("-BC") || algorithm.EndsWith("-OPENSSL")) && Strings.IsOneOf(algorithm, new string[]
{
"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[] array = algorithm.Split(new char[]
{
'/'
});
IBlockCipher blockCipher = null;
IAsymmetricBlockCipher asymmetricBlockCipher = null;
IStreamCipher streamCipher = null;
string text2 = array[0];
string text3 = (string)CipherUtilities.algorithms[text2];
if (text3 != null)
{
text2 = text3;
}
CipherUtilities.CipherAlgorithm cipherAlgorithm;
try
{
cipherAlgorithm = (CipherUtilities.CipherAlgorithm)Enums.GetEnumValue(typeof(CipherUtilities.CipherAlgorithm), text2);
}
catch (ArgumentException)
{
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
switch (cipherAlgorithm)
{
case CipherUtilities.CipherAlgorithm.AES:
blockCipher = new AesFastEngine();
break;
case CipherUtilities.CipherAlgorithm.ARC4:
streamCipher = new RC4Engine();
break;
case CipherUtilities.CipherAlgorithm.BLOWFISH:
blockCipher = new BlowfishEngine();
break;
case CipherUtilities.CipherAlgorithm.CAMELLIA:
blockCipher = new CamelliaEngine();
break;
case CipherUtilities.CipherAlgorithm.CAST5:
blockCipher = new Cast5Engine();
break;
case CipherUtilities.CipherAlgorithm.CAST6:
blockCipher = new Cast6Engine();
break;
case CipherUtilities.CipherAlgorithm.DES:
blockCipher = new DesEngine();
break;
case CipherUtilities.CipherAlgorithm.DESEDE:
blockCipher = new DesEdeEngine();
break;
case CipherUtilities.CipherAlgorithm.ELGAMAL:
asymmetricBlockCipher = new ElGamalEngine();
break;
case CipherUtilities.CipherAlgorithm.GOST28147:
blockCipher = new Gost28147Engine();
break;
case CipherUtilities.CipherAlgorithm.HC128:
streamCipher = new HC128Engine();
break;
case CipherUtilities.CipherAlgorithm.HC256:
streamCipher = new HC256Engine();
break;
case CipherUtilities.CipherAlgorithm.IDEA:
blockCipher = new IdeaEngine();
break;
case CipherUtilities.CipherAlgorithm.NOEKEON:
blockCipher = new NoekeonEngine();
break;
case CipherUtilities.CipherAlgorithm.PBEWITHSHAAND128BITRC4:
case CipherUtilities.CipherAlgorithm.PBEWITHSHAAND40BITRC4:
streamCipher = new RC4Engine();
break;
case CipherUtilities.CipherAlgorithm.RC2:
blockCipher = new RC2Engine();
break;
case CipherUtilities.CipherAlgorithm.RC5:
blockCipher = new RC532Engine();
break;
case CipherUtilities.CipherAlgorithm.RC5_64:
blockCipher = new RC564Engine();
break;
case CipherUtilities.CipherAlgorithm.RC6:
blockCipher = new RC6Engine();
break;
case CipherUtilities.CipherAlgorithm.RIJNDAEL:
blockCipher = new RijndaelEngine();
break;
case CipherUtilities.CipherAlgorithm.RSA:
asymmetricBlockCipher = new RsaBlindedEngine();
break;
case CipherUtilities.CipherAlgorithm.SALSA20:
streamCipher = new Salsa20Engine();
break;
case CipherUtilities.CipherAlgorithm.SEED:
blockCipher = new SeedEngine();
break;
case CipherUtilities.CipherAlgorithm.SERPENT:
blockCipher = new SerpentEngine();
break;
case CipherUtilities.CipherAlgorithm.SKIPJACK:
blockCipher = new SkipjackEngine();
break;
case CipherUtilities.CipherAlgorithm.TEA:
blockCipher = new TeaEngine();
break;
case CipherUtilities.CipherAlgorithm.TWOFISH:
blockCipher = new TwofishEngine();
break;
case CipherUtilities.CipherAlgorithm.VMPC:
streamCipher = new VmpcEngine();
break;
case CipherUtilities.CipherAlgorithm.VMPC_KSA3:
streamCipher = new VmpcKsa3Engine();
break;
case CipherUtilities.CipherAlgorithm.XTEA:
blockCipher = new XteaEngine();
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
if (streamCipher != null)
{
if (array.Length > 1)
{
throw new ArgumentException("Modes and paddings not used for stream ciphers");
}
return(new BufferedStreamCipher(streamCipher));
}
else
{
bool flag = false;
bool flag2 = true;
IBlockCipherPadding blockCipherPadding = null;
IAeadBlockCipher aeadBlockCipher = null;
if (array.Length > 2)
{
if (streamCipher != null)
{
throw new ArgumentException("Paddings not used for stream ciphers");
}
string text4 = array[2];
CipherUtilities.CipherPadding cipherPadding;
if (text4 == "")
{
cipherPadding = CipherUtilities.CipherPadding.RAW;
}
else if (text4 == "X9.23PADDING")
{
cipherPadding = CipherUtilities.CipherPadding.X923PADDING;
}
else
{
try
{
cipherPadding = (CipherUtilities.CipherPadding)Enums.GetEnumValue(typeof(CipherUtilities.CipherPadding), text4);
}
catch (ArgumentException)
{
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
switch (cipherPadding)
{
case CipherUtilities.CipherPadding.NOPADDING:
flag2 = false;
break;
case CipherUtilities.CipherPadding.RAW:
break;
case CipherUtilities.CipherPadding.ISO10126PADDING:
case CipherUtilities.CipherPadding.ISO10126D2PADDING:
case CipherUtilities.CipherPadding.ISO10126_2PADDING:
blockCipherPadding = new ISO10126d2Padding();
break;
case CipherUtilities.CipherPadding.ISO7816_4PADDING:
case CipherUtilities.CipherPadding.ISO9797_1PADDING:
blockCipherPadding = new ISO7816d4Padding();
break;
case CipherUtilities.CipherPadding.ISO9796_1:
case CipherUtilities.CipherPadding.ISO9796_1PADDING:
asymmetricBlockCipher = new ISO9796d1Encoding(asymmetricBlockCipher);
break;
case CipherUtilities.CipherPadding.OAEP:
case CipherUtilities.CipherPadding.OAEPPADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher);
break;
case CipherUtilities.CipherPadding.OAEPWITHMD5ANDMGF1PADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher, new MD5Digest());
break;
case CipherUtilities.CipherPadding.OAEPWITHSHA1ANDMGF1PADDING:
case CipherUtilities.CipherPadding.OAEPWITHSHA_1ANDMGF1PADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher, new Sha1Digest());
break;
case CipherUtilities.CipherPadding.OAEPWITHSHA224ANDMGF1PADDING:
case CipherUtilities.CipherPadding.OAEPWITHSHA_224ANDMGF1PADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher, new Sha224Digest());
break;
case CipherUtilities.CipherPadding.OAEPWITHSHA256ANDMGF1PADDING:
case CipherUtilities.CipherPadding.OAEPWITHSHA_256ANDMGF1PADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher, new Sha256Digest());
break;
case CipherUtilities.CipherPadding.OAEPWITHSHA384ANDMGF1PADDING:
case CipherUtilities.CipherPadding.OAEPWITHSHA_384ANDMGF1PADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher, new Sha384Digest());
break;
case CipherUtilities.CipherPadding.OAEPWITHSHA512ANDMGF1PADDING:
case CipherUtilities.CipherPadding.OAEPWITHSHA_512ANDMGF1PADDING:
asymmetricBlockCipher = new OaepEncoding(asymmetricBlockCipher, new Sha512Digest());
break;
case CipherUtilities.CipherPadding.PKCS1:
case CipherUtilities.CipherPadding.PKCS1PADDING:
asymmetricBlockCipher = new Pkcs1Encoding(asymmetricBlockCipher);
break;
case CipherUtilities.CipherPadding.PKCS5:
case CipherUtilities.CipherPadding.PKCS5PADDING:
case CipherUtilities.CipherPadding.PKCS7:
case CipherUtilities.CipherPadding.PKCS7PADDING:
blockCipherPadding = new Pkcs7Padding();
break;
case CipherUtilities.CipherPadding.TBCPADDING:
blockCipherPadding = new TbcPadding();
break;
case CipherUtilities.CipherPadding.WITHCTS:
flag = true;
break;
case CipherUtilities.CipherPadding.X923PADDING:
blockCipherPadding = new X923Padding();
break;
case CipherUtilities.CipherPadding.ZEROBYTEPADDING:
blockCipherPadding = new ZeroBytePadding();
break;
default:
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
if (array.Length > 1)
{
string text5 = array[1];
int digitIndex = CipherUtilities.GetDigitIndex(text5);
string text6 = (digitIndex >= 0) ? text5.Substring(0, digitIndex) : text5;
try
{
switch ((text6 == "") ? CipherUtilities.CipherMode.NONE : ((CipherUtilities.CipherMode)Enums.GetEnumValue(typeof(CipherUtilities.CipherMode), text6)))
{
case CipherUtilities.CipherMode.ECB:
case CipherUtilities.CipherMode.NONE:
break;
case CipherUtilities.CipherMode.CBC:
blockCipher = new CbcBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.CCM:
aeadBlockCipher = new CcmBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.CFB:
{
int bitBlockSize = (digitIndex < 0) ? (8 * blockCipher.GetBlockSize()) : int.Parse(text5.Substring(digitIndex));
blockCipher = new CfbBlockCipher(blockCipher, bitBlockSize);
break;
}
case CipherUtilities.CipherMode.CTR:
blockCipher = new SicBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.CTS:
flag = true;
blockCipher = new CbcBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.EAX:
aeadBlockCipher = new EaxBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.GCM:
aeadBlockCipher = new GcmBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.GOFB:
blockCipher = new GOfbBlockCipher(blockCipher);
break;
case CipherUtilities.CipherMode.OCB:
aeadBlockCipher = new OcbBlockCipher(blockCipher, CipherUtilities.CreateBlockCipher(cipherAlgorithm));
break;
case CipherUtilities.CipherMode.OFB:
{
int blockSize = (digitIndex < 0) ? (8 * blockCipher.GetBlockSize()) : int.Parse(text5.Substring(digitIndex));
blockCipher = new OfbBlockCipher(blockCipher, blockSize);
break;
}
case CipherUtilities.CipherMode.OPENPGPCFB:
blockCipher = new OpenPgpCfbBlockCipher(blockCipher);
break;
case CipherUtilities.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 (flag)
{
throw new SecurityUtilityException("CTS mode not valid for AEAD ciphers.");
}
if (flag2 && array.Length > 2 && array[2] != "")
{
throw new SecurityUtilityException("Bad padding specified for AEAD cipher.");
}
return(new BufferedAeadBlockCipher(aeadBlockCipher));
}
else if (blockCipher != null)
{
if (flag)
{
return(new CtsBlockCipher(blockCipher));
}
if (blockCipherPadding != null)
{
return(new PaddedBufferedBlockCipher(blockCipher, blockCipherPadding));
}
if (!flag2 || blockCipher.IsPartialBlockOkay)
{
return(new BufferedBlockCipher(blockCipher));
}
return(new PaddedBufferedBlockCipher(blockCipher));
}
else
{
if (asymmetricBlockCipher != null)
{
return(new BufferedAsymmetricBlockCipher(asymmetricBlockCipher));
}
throw new SecurityUtilityException("Cipher " + algorithm + " not recognised.");
}
}
}
public static IWrapper GetWrapper(string algorithm)
{
string text = Platform.ToUpperInvariant(algorithm);
string text2 = (string)WrapperUtilities.algorithms[text];
if (text2 == null)
{
text2 = text;
}
try
{
switch ((WrapperUtilities.WrapAlgorithm)Enums.GetEnumValue(typeof(WrapperUtilities.WrapAlgorithm), text2))
{
case WrapperUtilities.WrapAlgorithm.AESWRAP:
{
IWrapper result = new AesWrapEngine();
return(result);
}
case WrapperUtilities.WrapAlgorithm.CAMELLIAWRAP:
{
IWrapper result = new CamelliaWrapEngine();
return(result);
}
case WrapperUtilities.WrapAlgorithm.DESEDEWRAP:
{
IWrapper result = new DesEdeWrapEngine();
return(result);
}
case WrapperUtilities.WrapAlgorithm.RC2WRAP:
{
IWrapper result = new RC2WrapEngine();
return(result);
}
case WrapperUtilities.WrapAlgorithm.SEEDWRAP:
{
IWrapper result = new SeedWrapEngine();
return(result);
}
case WrapperUtilities.WrapAlgorithm.DESEDERFC3211WRAP:
{
IWrapper result = new Rfc3211WrapEngine(new DesEdeEngine());
return(result);
}
case WrapperUtilities.WrapAlgorithm.AESRFC3211WRAP:
{
IWrapper result = new Rfc3211WrapEngine(new AesFastEngine());
return(result);
}
case WrapperUtilities.WrapAlgorithm.CAMELLIARFC3211WRAP:
{
IWrapper result = new Rfc3211WrapEngine(new CamelliaEngine());
return(result);
}
}
}
catch (ArgumentException)
{
}
IBufferedCipher cipher = CipherUtilities.GetCipher(algorithm);
if (cipher != null)
{
return(new WrapperUtilities.BufferedCipherWrapper(cipher));
}
throw new SecurityUtilityException("Wrapper " + algorithm + " not recognised.");
}