using System.Collections; using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.CryptoPro; using Org.BouncyCastle.Asn1.Iana; using Org.BouncyCastle.Asn1.Kisa; using Org.BouncyCastle.Asn1.Nist; using Org.BouncyCastle.Asn1.Ntt; using Org.BouncyCastle.Asn1.Oiw; using Org.BouncyCastle.Asn1.Pkcs; using Org.BouncyCastle.Asn1.X9; using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Generators; using Org.BouncyCastle.Utilities; using Org.BouncyCastle.Utilities.Collections; namespace Org.BouncyCastle.Security { public sealed class GeneratorUtilities { private GeneratorUtilities() { } 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", "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"); 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]; } } }