diff options
Diffstat (limited to 'crypto/src/security/GeneratorUtilities.cs')
| -rw-r--r-- | crypto/src/security/GeneratorUtilities.cs | 646 |
1 files changed, 327 insertions, 319 deletions
diff --git a/crypto/src/security/GeneratorUtilities.cs b/crypto/src/security/GeneratorUtilities.cs index 8e9290222..45fbc9425 100644 --- a/crypto/src/security/GeneratorUtilities.cs +++ b/crypto/src/security/GeneratorUtilities.cs @@ -1,5 +1,4 @@ using System.Collections; -using System.Globalization; using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.CryptoPro; @@ -17,325 +16,334 @@ using Org.BouncyCastle.Utilities.Collections; namespace Org.BouncyCastle.Security { - public sealed class GeneratorUtilities - { - private GeneratorUtilities() - { - } + public sealed class GeneratorUtilities + { + private GeneratorUtilities() + { + } - private static readonly IDictionary kgAlgorithms = Platform.CreateHashtable(); + private static readonly IDictionary kgAlgorithms = Platform.CreateHashtable(); private static readonly IDictionary kpgAlgorithms = Platform.CreateHashtable(); - private static readonly IDictionary defaultKeySizes = Platform.CreateHashtable(); - - static GeneratorUtilities() - { - // - // key generators. - // - AddKgAlgorithm("AES", - "AESWRAP"); - AddKgAlgorithm("AES128", - "2.16.840.1.101.3.4.2", - NistObjectIdentifiers.IdAes128Cbc, - NistObjectIdentifiers.IdAes128Cfb, - NistObjectIdentifiers.IdAes128Ecb, - NistObjectIdentifiers.IdAes128Ofb, - NistObjectIdentifiers.IdAes128Wrap); - AddKgAlgorithm("AES192", - "2.16.840.1.101.3.4.22", - NistObjectIdentifiers.IdAes192Cbc, - NistObjectIdentifiers.IdAes192Cfb, - NistObjectIdentifiers.IdAes192Ecb, - NistObjectIdentifiers.IdAes192Ofb, - NistObjectIdentifiers.IdAes192Wrap); - AddKgAlgorithm("AES256", - "2.16.840.1.101.3.4.42", - NistObjectIdentifiers.IdAes256Cbc, - NistObjectIdentifiers.IdAes256Cfb, - NistObjectIdentifiers.IdAes256Ecb, - NistObjectIdentifiers.IdAes256Ofb, - NistObjectIdentifiers.IdAes256Wrap); - AddKgAlgorithm("BLOWFISH", - "1.3.6.1.4.1.3029.1.2"); - AddKgAlgorithm("CAMELLIA", - "CAMELLIAWRAP"); - AddKgAlgorithm("CAMELLIA128", - NttObjectIdentifiers.IdCamellia128Cbc, - NttObjectIdentifiers.IdCamellia128Wrap); - AddKgAlgorithm("CAMELLIA192", - NttObjectIdentifiers.IdCamellia192Cbc, - NttObjectIdentifiers.IdCamellia192Wrap); - AddKgAlgorithm("CAMELLIA256", - NttObjectIdentifiers.IdCamellia256Cbc, - NttObjectIdentifiers.IdCamellia256Wrap); - AddKgAlgorithm("CAST5", - "1.2.840.113533.7.66.10"); - AddKgAlgorithm("CAST6"); - AddKgAlgorithm("DES", - OiwObjectIdentifiers.DesCbc, - OiwObjectIdentifiers.DesCfb, - OiwObjectIdentifiers.DesEcb, - OiwObjectIdentifiers.DesOfb); - AddKgAlgorithm("DESEDE", - "DESEDEWRAP", - OiwObjectIdentifiers.DesEde); - AddKgAlgorithm("DESEDE3", - PkcsObjectIdentifiers.DesEde3Cbc, - PkcsObjectIdentifiers.IdAlgCms3DesWrap); - AddKgAlgorithm("GOST28147", - "GOST", - "GOST-28147", - CryptoProObjectIdentifiers.GostR28147Cbc); - AddKgAlgorithm("HC128"); - AddKgAlgorithm("HC256"); - AddKgAlgorithm("IDEA", - "1.3.6.1.4.1.188.7.1.1.2"); - AddKgAlgorithm("NOEKEON"); - AddKgAlgorithm("RC2", - PkcsObjectIdentifiers.RC2Cbc, - PkcsObjectIdentifiers.IdAlgCmsRC2Wrap); - AddKgAlgorithm("RC4", - "ARC4", - "1.2.840.113549.3.4"); - AddKgAlgorithm("RC5", - "RC5-32"); - AddKgAlgorithm("RC5-64"); - AddKgAlgorithm("RC6"); - AddKgAlgorithm("RIJNDAEL"); - AddKgAlgorithm("SALSA20"); - AddKgAlgorithm("SEED", - KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap, - KisaObjectIdentifiers.IdSeedCbc); - AddKgAlgorithm("SERPENT"); - AddKgAlgorithm("SKIPJACK"); - AddKgAlgorithm("TEA"); - AddKgAlgorithm("TWOFISH"); - AddKgAlgorithm("VMPC"); - AddKgAlgorithm("VMPC-KSA3"); - AddKgAlgorithm("XTEA"); - - // - // HMac key generators - // - AddHMacKeyGenerator("MD2"); - AddHMacKeyGenerator("MD4"); - AddHMacKeyGenerator("MD5", - IanaObjectIdentifiers.HmacMD5); - AddHMacKeyGenerator("SHA1", - PkcsObjectIdentifiers.IdHmacWithSha1, - IanaObjectIdentifiers.HmacSha1); - AddHMacKeyGenerator("SHA224", - PkcsObjectIdentifiers.IdHmacWithSha224); - AddHMacKeyGenerator("SHA256", - PkcsObjectIdentifiers.IdHmacWithSha256); - AddHMacKeyGenerator("SHA384", - PkcsObjectIdentifiers.IdHmacWithSha384); - AddHMacKeyGenerator("SHA512", - PkcsObjectIdentifiers.IdHmacWithSha512); - AddHMacKeyGenerator("RIPEMD128"); - AddHMacKeyGenerator("RIPEMD160", - IanaObjectIdentifiers.HmacRipeMD160); - AddHMacKeyGenerator("TIGER", - IanaObjectIdentifiers.HmacTiger); - - - - // - // key pair generators. - // - AddKpgAlgorithm("DH", - "DIFFIEHELLMAN"); - AddKpgAlgorithm("DSA"); - AddKpgAlgorithm("EC", - // TODO Should this be an alias for ECDH? - X9ObjectIdentifiers.DHSinglePassStdDHSha1KdfScheme); - AddKpgAlgorithm("ECDH", - "ECIES"); - AddKpgAlgorithm("ECDHC"); - AddKpgAlgorithm("ECMQV", - X9ObjectIdentifiers.MqvSinglePassSha1KdfScheme); - AddKpgAlgorithm("ECDSA"); - AddKpgAlgorithm("ECGOST3410", - "ECGOST-3410", - "GOST-3410-2001"); - AddKpgAlgorithm("ELGAMAL"); - AddKpgAlgorithm("GOST3410", + private static readonly IDictionary defaultKeySizes = Platform.CreateHashtable(); + + static GeneratorUtilities() + { + // + // key generators. + // + AddKgAlgorithm("AES", + "AESWRAP"); + AddKgAlgorithm("AES128", + "2.16.840.1.101.3.4.2", + NistObjectIdentifiers.IdAes128Cbc, + NistObjectIdentifiers.IdAes128Cfb, + NistObjectIdentifiers.IdAes128Ecb, + NistObjectIdentifiers.IdAes128Ofb, + NistObjectIdentifiers.IdAes128Wrap); + AddKgAlgorithm("AES192", + "2.16.840.1.101.3.4.22", + NistObjectIdentifiers.IdAes192Cbc, + NistObjectIdentifiers.IdAes192Cfb, + NistObjectIdentifiers.IdAes192Ecb, + NistObjectIdentifiers.IdAes192Ofb, + NistObjectIdentifiers.IdAes192Wrap); + AddKgAlgorithm("AES256", + "2.16.840.1.101.3.4.42", + NistObjectIdentifiers.IdAes256Cbc, + NistObjectIdentifiers.IdAes256Cfb, + NistObjectIdentifiers.IdAes256Ecb, + NistObjectIdentifiers.IdAes256Ofb, + NistObjectIdentifiers.IdAes256Wrap); + AddKgAlgorithm("BLOWFISH", + "1.3.6.1.4.1.3029.1.2"); + AddKgAlgorithm("CAMELLIA", + "CAMELLIAWRAP"); + AddKgAlgorithm("CAMELLIA128", + NttObjectIdentifiers.IdCamellia128Cbc, + NttObjectIdentifiers.IdCamellia128Wrap); + AddKgAlgorithm("CAMELLIA192", + NttObjectIdentifiers.IdCamellia192Cbc, + NttObjectIdentifiers.IdCamellia192Wrap); + AddKgAlgorithm("CAMELLIA256", + NttObjectIdentifiers.IdCamellia256Cbc, + NttObjectIdentifiers.IdCamellia256Wrap); + AddKgAlgorithm("CAST5", + "1.2.840.113533.7.66.10"); + AddKgAlgorithm("CAST6"); + AddKgAlgorithm("DES", + OiwObjectIdentifiers.DesCbc, + OiwObjectIdentifiers.DesCfb, + OiwObjectIdentifiers.DesEcb, + OiwObjectIdentifiers.DesOfb); + AddKgAlgorithm("DESEDE", + "DESEDEWRAP", + "TDEA", + OiwObjectIdentifiers.DesEde); + AddKgAlgorithm("DESEDE3", + PkcsObjectIdentifiers.DesEde3Cbc, + PkcsObjectIdentifiers.IdAlgCms3DesWrap); + AddKgAlgorithm("GOST28147", + "GOST", + "GOST-28147", + CryptoProObjectIdentifiers.GostR28147Cbc); + AddKgAlgorithm("HC128"); + AddKgAlgorithm("HC256"); + AddKgAlgorithm("IDEA", + "1.3.6.1.4.1.188.7.1.1.2"); + AddKgAlgorithm("NOEKEON"); + AddKgAlgorithm("RC2", + PkcsObjectIdentifiers.RC2Cbc, + PkcsObjectIdentifiers.IdAlgCmsRC2Wrap); + AddKgAlgorithm("RC4", + "ARC4", + "1.2.840.113549.3.4"); + AddKgAlgorithm("RC5", + "RC5-32"); + AddKgAlgorithm("RC5-64"); + AddKgAlgorithm("RC6"); + AddKgAlgorithm("RIJNDAEL"); + AddKgAlgorithm("SALSA20"); + AddKgAlgorithm("SEED", + KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap, + KisaObjectIdentifiers.IdSeedCbc); + AddKgAlgorithm("SERPENT"); + AddKgAlgorithm("SKIPJACK"); + AddKgAlgorithm("TEA"); + AddKgAlgorithm("TWOFISH"); + AddKgAlgorithm("VMPC"); + AddKgAlgorithm("VMPC-KSA3"); + AddKgAlgorithm("XTEA"); + + // + // HMac key generators + // + AddHMacKeyGenerator("MD2"); + AddHMacKeyGenerator("MD4"); + AddHMacKeyGenerator("MD5", + IanaObjectIdentifiers.HmacMD5); + AddHMacKeyGenerator("SHA1", + PkcsObjectIdentifiers.IdHmacWithSha1, + IanaObjectIdentifiers.HmacSha1); + AddHMacKeyGenerator("SHA224", + PkcsObjectIdentifiers.IdHmacWithSha224); + AddHMacKeyGenerator("SHA256", + PkcsObjectIdentifiers.IdHmacWithSha256); + AddHMacKeyGenerator("SHA384", + PkcsObjectIdentifiers.IdHmacWithSha384); + AddHMacKeyGenerator("SHA512", + PkcsObjectIdentifiers.IdHmacWithSha512); + AddHMacKeyGenerator("SHA512/224"); + AddHMacKeyGenerator("SHA512/256"); + AddHMacKeyGenerator("SHA3-224"); + AddHMacKeyGenerator("SHA3-256"); + AddHMacKeyGenerator("SHA3-384"); + AddHMacKeyGenerator("SHA3-512"); + AddHMacKeyGenerator("RIPEMD128"); + AddHMacKeyGenerator("RIPEMD160", + IanaObjectIdentifiers.HmacRipeMD160); + AddHMacKeyGenerator("TIGER", + IanaObjectIdentifiers.HmacTiger); + + + + // + // key pair generators. + // + AddKpgAlgorithm("DH", + "DIFFIEHELLMAN"); + AddKpgAlgorithm("DSA"); + AddKpgAlgorithm("EC", + // TODO Should this be an alias for ECDH? + X9ObjectIdentifiers.DHSinglePassStdDHSha1KdfScheme); + AddKpgAlgorithm("ECDH", + "ECIES"); + AddKpgAlgorithm("ECDHC"); + AddKpgAlgorithm("ECMQV", + X9ObjectIdentifiers.MqvSinglePassSha1KdfScheme); + AddKpgAlgorithm("ECDSA"); + AddKpgAlgorithm("ECGOST3410", + "ECGOST-3410", + "GOST-3410-2001"); + AddKpgAlgorithm("ELGAMAL"); + AddKpgAlgorithm("GOST3410", "GOST-3410", - "GOST-3410-94"); - AddKpgAlgorithm("RSA", - "1.2.840.113549.1.1.1"); - - AddDefaultKeySizeEntries(64, "DES"); - AddDefaultKeySizeEntries(80, "SKIPJACK"); - AddDefaultKeySizeEntries(128, "AES128", "BLOWFISH", "CAMELLIA128", "CAST5", "DESEDE", - "HC128", "HMACMD2", "HMACMD4", "HMACMD5", "HMACRIPEMD128", "IDEA", "NOEKEON", - "RC2", "RC4", "RC5", "SALSA20", "SEED", "TEA", "XTEA", "VMPC", "VMPC-KSA3"); - AddDefaultKeySizeEntries(160, "HMACRIPEMD160", "HMACSHA1"); - AddDefaultKeySizeEntries(192, "AES", "AES192", "CAMELLIA192", "DESEDE3", "HMACTIGER", - "RIJNDAEL", "SERPENT"); - AddDefaultKeySizeEntries(224, "HMACSHA224"); - AddDefaultKeySizeEntries(256, "AES256", "CAMELLIA", "CAMELLIA256", "CAST6", "GOST28147", - "HC256", "HMACSHA256", "RC5-64", "RC6", "TWOFISH"); - AddDefaultKeySizeEntries(384, "HMACSHA384"); - AddDefaultKeySizeEntries(512, "HMACSHA512"); - } - - private static void AddDefaultKeySizeEntries(int size, params string[] algorithms) - { - foreach (string algorithm in algorithms) - { - defaultKeySizes.Add(algorithm, size); - } - } - - private static void AddKgAlgorithm( - string canonicalName, - params object[] aliases) - { - kgAlgorithms[canonicalName] = canonicalName; - - foreach (object alias in aliases) - { - kgAlgorithms[alias.ToString()] = canonicalName; - } - } - - private static void AddKpgAlgorithm( - string canonicalName, - params object[] aliases) - { - kpgAlgorithms[canonicalName] = canonicalName; - - foreach (object alias in aliases) - { - kpgAlgorithms[alias.ToString()] = canonicalName; - } - } - - private static void AddHMacKeyGenerator( - string algorithm, - params object[] aliases) - { - string mainName = "HMAC" + algorithm; - - kgAlgorithms[mainName] = mainName; - kgAlgorithms["HMAC-" + algorithm] = mainName; - kgAlgorithms["HMAC/" + algorithm] = mainName; - - foreach (object alias in aliases) - { - kgAlgorithms[alias.ToString()] = mainName; - } - } - - // TODO Consider making this public - internal static string GetCanonicalKeyGeneratorAlgorithm( - string algorithm) - { - return (string) kgAlgorithms[algorithm.ToUpperInvariant()]; - } - - // TODO Consider making this public - internal static string GetCanonicalKeyPairGeneratorAlgorithm( - string algorithm) - { - return (string) kpgAlgorithms[algorithm.ToUpperInvariant()]; - } - - public static CipherKeyGenerator GetKeyGenerator( - DerObjectIdentifier oid) - { - return GetKeyGenerator(oid.Id); - } - - public static CipherKeyGenerator GetKeyGenerator( - string algorithm) - { - string canonicalName = GetCanonicalKeyGeneratorAlgorithm(algorithm); - - if (canonicalName == null) - throw new SecurityUtilityException("KeyGenerator " + algorithm + " not recognised."); - - int defaultKeySize = FindDefaultKeySize(canonicalName); - if (defaultKeySize == -1) - throw new SecurityUtilityException("KeyGenerator " + algorithm - + " (" + canonicalName + ") not supported."); - - if (canonicalName == "DES") - return new DesKeyGenerator(defaultKeySize); - - if (canonicalName == "DESEDE" || canonicalName == "DESEDE3") - return new DesEdeKeyGenerator(defaultKeySize); - - return new CipherKeyGenerator(defaultKeySize); - } - - public static IAsymmetricCipherKeyPairGenerator GetKeyPairGenerator( - DerObjectIdentifier oid) - { - return GetKeyPairGenerator(oid.Id); - } - - public static IAsymmetricCipherKeyPairGenerator GetKeyPairGenerator( - string algorithm) - { - string canonicalName = GetCanonicalKeyPairGeneratorAlgorithm(algorithm); - - if (canonicalName == null) - throw new SecurityUtilityException("KeyPairGenerator " + algorithm + " not recognised."); - - if (canonicalName == "DH") - return new DHKeyPairGenerator(); - - if (canonicalName == "DSA") - return new DsaKeyPairGenerator(); - - // "EC", "ECDH", "ECDHC", "ECDSA", "ECGOST3410", "ECMQV" - if (canonicalName.StartsWith("EC")) - return new ECKeyPairGenerator(canonicalName); - - if (canonicalName == "ELGAMAL") - return new ElGamalKeyPairGenerator(); - - if (canonicalName == "GOST3410") - return new Gost3410KeyPairGenerator(); - - if (canonicalName == "RSA") - return new RsaKeyPairGenerator(); - - throw new SecurityUtilityException("KeyPairGenerator " + algorithm - + " (" + canonicalName + ") not supported."); - } - - internal static int GetDefaultKeySize( - DerObjectIdentifier oid) - { - return GetDefaultKeySize(oid.Id); - } - - internal static int GetDefaultKeySize( - string algorithm) - { - string canonicalName = GetCanonicalKeyGeneratorAlgorithm(algorithm); - - if (canonicalName == null) - throw new SecurityUtilityException("KeyGenerator " + algorithm + " not recognised."); - - int defaultKeySize = FindDefaultKeySize(canonicalName); - if (defaultKeySize == -1) - throw new SecurityUtilityException("KeyGenerator " + algorithm - + " (" + canonicalName + ") not supported."); - - return defaultKeySize; - } - - private static int FindDefaultKeySize( - string canonicalName) - { - if (!defaultKeySizes.Contains(canonicalName)) - return -1; - - return (int)defaultKeySizes[canonicalName]; - } - } + "GOST-3410-94"); + AddKpgAlgorithm("RSA", + "1.2.840.113549.1.1.1"); + + AddDefaultKeySizeEntries(64, "DES"); + AddDefaultKeySizeEntries(80, "SKIPJACK"); + AddDefaultKeySizeEntries(128, "AES128", "BLOWFISH", "CAMELLIA128", "CAST5", "DESEDE", + "HC128", "HMACMD2", "HMACMD4", "HMACMD5", "HMACRIPEMD128", "IDEA", "NOEKEON", + "RC2", "RC4", "RC5", "SALSA20", "SEED", "TEA", "XTEA", "VMPC", "VMPC-KSA3"); + AddDefaultKeySizeEntries(160, "HMACRIPEMD160", "HMACSHA1"); + AddDefaultKeySizeEntries(192, "AES", "AES192", "CAMELLIA192", "DESEDE3", "HMACTIGER", + "RIJNDAEL", "SERPENT"); + AddDefaultKeySizeEntries(224, "HMACSHA224"); + AddDefaultKeySizeEntries(256, "AES256", "CAMELLIA", "CAMELLIA256", "CAST6", "GOST28147", + "HC256", "HMACSHA256", "RC5-64", "RC6", "TWOFISH"); + AddDefaultKeySizeEntries(384, "HMACSHA384"); + AddDefaultKeySizeEntries(512, "HMACSHA512"); + AddDefaultKeySizeEntries(224, "HMACSHA512/224"); + AddDefaultKeySizeEntries(256, "HMACSHA512/256"); + } + + private static void AddDefaultKeySizeEntries(int size, params string[] algorithms) + { + foreach (string algorithm in algorithms) + { + defaultKeySizes.Add(algorithm, size); + } + } + + private static void AddKgAlgorithm( + string canonicalName, + params object[] aliases) + { + kgAlgorithms[canonicalName] = canonicalName; + + foreach (object alias in aliases) + { + kgAlgorithms[alias.ToString()] = canonicalName; + } + } + + private static void AddKpgAlgorithm( + string canonicalName, + params object[] aliases) + { + kpgAlgorithms[canonicalName] = canonicalName; + + foreach (object alias in aliases) + { + kpgAlgorithms[alias.ToString()] = canonicalName; + } + } + + private static void AddHMacKeyGenerator( + string algorithm, + params object[] aliases) + { + string mainName = "HMAC" + algorithm; + + kgAlgorithms[mainName] = mainName; + kgAlgorithms["HMAC-" + algorithm] = mainName; + kgAlgorithms["HMAC/" + algorithm] = mainName; + + foreach (object alias in aliases) + { + kgAlgorithms[alias.ToString()] = mainName; + } + } + + // TODO Consider making this public + internal static string GetCanonicalKeyGeneratorAlgorithm( + string algorithm) + { + return (string) kgAlgorithms[Platform.ToUpperInvariant(algorithm)]; + } + + // TODO Consider making this public + internal static string GetCanonicalKeyPairGeneratorAlgorithm( + string algorithm) + { + return (string)kpgAlgorithms[Platform.ToUpperInvariant(algorithm)]; + } + + public static CipherKeyGenerator GetKeyGenerator( + DerObjectIdentifier oid) + { + return GetKeyGenerator(oid.Id); + } + + public static CipherKeyGenerator GetKeyGenerator( + string algorithm) + { + string canonicalName = GetCanonicalKeyGeneratorAlgorithm(algorithm); + + if (canonicalName == null) + throw new SecurityUtilityException("KeyGenerator " + algorithm + " not recognised."); + + int defaultKeySize = FindDefaultKeySize(canonicalName); + if (defaultKeySize == -1) + throw new SecurityUtilityException("KeyGenerator " + algorithm + + " (" + canonicalName + ") not supported."); + + if (canonicalName == "DES") + return new DesKeyGenerator(defaultKeySize); + + if (canonicalName == "DESEDE" || canonicalName == "DESEDE3") + return new DesEdeKeyGenerator(defaultKeySize); + + return new CipherKeyGenerator(defaultKeySize); + } + + public static IAsymmetricCipherKeyPairGenerator GetKeyPairGenerator( + DerObjectIdentifier oid) + { + return GetKeyPairGenerator(oid.Id); + } + + public static IAsymmetricCipherKeyPairGenerator GetKeyPairGenerator( + string algorithm) + { + string canonicalName = GetCanonicalKeyPairGeneratorAlgorithm(algorithm); + + if (canonicalName == null) + throw new SecurityUtilityException("KeyPairGenerator " + algorithm + " not recognised."); + + if (canonicalName == "DH") + return new DHKeyPairGenerator(); + + if (canonicalName == "DSA") + return new DsaKeyPairGenerator(); + + // "EC", "ECDH", "ECDHC", "ECDSA", "ECGOST3410", "ECMQV" + if (canonicalName.StartsWith("EC")) + return new ECKeyPairGenerator(canonicalName); + + if (canonicalName == "ELGAMAL") + return new ElGamalKeyPairGenerator(); + + if (canonicalName == "GOST3410") + return new Gost3410KeyPairGenerator(); + + if (canonicalName == "RSA") + return new RsaKeyPairGenerator(); + + throw new SecurityUtilityException("KeyPairGenerator " + algorithm + + " (" + canonicalName + ") not supported."); + } + + internal static int GetDefaultKeySize( + DerObjectIdentifier oid) + { + return GetDefaultKeySize(oid.Id); + } + + internal static int GetDefaultKeySize( + string algorithm) + { + string canonicalName = GetCanonicalKeyGeneratorAlgorithm(algorithm); + + if (canonicalName == null) + throw new SecurityUtilityException("KeyGenerator " + algorithm + " not recognised."); + + int defaultKeySize = FindDefaultKeySize(canonicalName); + if (defaultKeySize == -1) + throw new SecurityUtilityException("KeyGenerator " + algorithm + + " (" + canonicalName + ") not supported."); + + return defaultKeySize; + } + + private static int FindDefaultKeySize( + string canonicalName) + { + if (!defaultKeySizes.Contains(canonicalName)) + return -1; + + return (int)defaultKeySizes[canonicalName]; + } + } } |