using System; using System.Collections; using System.Globalization; using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.Iana; using Org.BouncyCastle.Asn1.Nist; using Org.BouncyCastle.Asn1.Pkcs; using Org.BouncyCastle.Asn1.Rosstandart; using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Engines; using Org.BouncyCastle.Crypto.Macs; using Org.BouncyCastle.Crypto.Paddings; using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Security { /// /// Utility class for creating HMac object from their names/Oids /// public sealed class MacUtilities { private MacUtilities() { } private static readonly IDictionary algorithms = Platform.CreateHashtable(); //private static readonly IDictionary oids = Platform.CreateHashtable(); static MacUtilities() { algorithms[IanaObjectIdentifiers.HmacMD5.Id] = "HMAC-MD5"; algorithms[IanaObjectIdentifiers.HmacRipeMD160.Id] = "HMAC-RIPEMD160"; algorithms[IanaObjectIdentifiers.HmacSha1.Id] = "HMAC-SHA1"; algorithms[IanaObjectIdentifiers.HmacTiger.Id] = "HMAC-TIGER"; algorithms[PkcsObjectIdentifiers.IdHmacWithSha1.Id] = "HMAC-SHA1"; algorithms[PkcsObjectIdentifiers.IdHmacWithSha224.Id] = "HMAC-SHA224"; algorithms[PkcsObjectIdentifiers.IdHmacWithSha256.Id] = "HMAC-SHA256"; algorithms[PkcsObjectIdentifiers.IdHmacWithSha384.Id] = "HMAC-SHA384"; algorithms[PkcsObjectIdentifiers.IdHmacWithSha512.Id] = "HMAC-SHA512"; algorithms[NistObjectIdentifiers.IdHMacWithSha3_224.Id] = "HMAC-SHA3-224"; algorithms[NistObjectIdentifiers.IdHMacWithSha3_256.Id] = "HMAC-SHA3-256"; algorithms[NistObjectIdentifiers.IdHMacWithSha3_384.Id] = "HMAC-SHA3-384"; algorithms[NistObjectIdentifiers.IdHMacWithSha3_512.Id] = "HMAC-SHA3-512"; algorithms[RosstandartObjectIdentifiers.id_tc26_hmac_gost_3411_12_256.Id] = "HMAC-GOST3411-2012-256"; algorithms[RosstandartObjectIdentifiers.id_tc26_hmac_gost_3411_12_512.Id] = "HMAC-GOST3411-2012-512"; // TODO AESMAC? algorithms["DES"] = "DESMAC"; algorithms["DES/CFB8"] = "DESMAC/CFB8"; algorithms["DES64"] = "DESMAC64"; algorithms["DESEDE"] = "DESEDEMAC"; algorithms[PkcsObjectIdentifiers.DesEde3Cbc.Id] = "DESEDEMAC"; algorithms["DESEDE/CFB8"] = "DESEDEMAC/CFB8"; algorithms["DESISO9797MAC"] = "DESWITHISO9797"; algorithms["DESEDE64"] = "DESEDEMAC64"; algorithms["DESEDE64WITHISO7816-4PADDING"] = "DESEDEMAC64WITHISO7816-4PADDING"; algorithms["DESEDEISO9797ALG1MACWITHISO7816-4PADDING"] = "DESEDEMAC64WITHISO7816-4PADDING"; algorithms["DESEDEISO9797ALG1WITHISO7816-4PADDING"] = "DESEDEMAC64WITHISO7816-4PADDING"; algorithms["ISO9797ALG3"] = "ISO9797ALG3MAC"; algorithms["ISO9797ALG3MACWITHISO7816-4PADDING"] = "ISO9797ALG3WITHISO7816-4PADDING"; algorithms["SKIPJACK"] = "SKIPJACKMAC"; algorithms["SKIPJACK/CFB8"] = "SKIPJACKMAC/CFB8"; algorithms["IDEA"] = "IDEAMAC"; algorithms["IDEA/CFB8"] = "IDEAMAC/CFB8"; algorithms["RC2"] = "RC2MAC"; algorithms["RC2/CFB8"] = "RC2MAC/CFB8"; algorithms["RC5"] = "RC5MAC"; algorithms["RC5/CFB8"] = "RC5MAC/CFB8"; algorithms["GOST28147"] = "GOST28147MAC"; algorithms["VMPC"] = "VMPCMAC"; algorithms["VMPC-MAC"] = "VMPCMAC"; algorithms["SIPHASH"] = "SIPHASH-2-4"; algorithms["PBEWITHHMACSHA"] = "PBEWITHHMACSHA1"; algorithms["1.3.14.3.2.26"] = "PBEWITHHMACSHA1"; } // /// // /// Returns a ObjectIdentifier for a given digest mechanism. // /// // /// A string representation of the digest meanism. // /// A DerObjectIdentifier, null if the Oid is not available. // public static DerObjectIdentifier GetObjectIdentifier( // string mechanism) // { // mechanism = (string) algorithms[Platform.ToUpperInvariant(mechanism)]; // // if (mechanism != null) // { // return (DerObjectIdentifier)oids[mechanism]; // } // // return null; // } // public static ICollection Algorithms // { // get { return oids.Keys; } // } public static IMac GetMac( DerObjectIdentifier id) { return GetMac(id.Id); } public static IMac GetMac( string algorithm) { string upper = Platform.ToUpperInvariant(algorithm); string mechanism = (string) algorithms[upper]; if (mechanism == null) { mechanism = upper; } if (Platform.StartsWith(mechanism, "PBEWITH")) { mechanism = mechanism.Substring("PBEWITH".Length); } if (Platform.StartsWith(mechanism, "HMAC")) { string digestName; if (Platform.StartsWith(mechanism, "HMAC-") || Platform.StartsWith(mechanism, "HMAC/")) { digestName = mechanism.Substring(5); } else { digestName = mechanism.Substring(4); } return new HMac(DigestUtilities.GetDigest(digestName)); } if (mechanism == "AESCMAC") { return new CMac(new AesEngine()); } if (mechanism == "DESMAC") { return new CbcBlockCipherMac(new DesEngine()); } if (mechanism == "DESMAC/CFB8") { return new CfbBlockCipherMac(new DesEngine()); } if (mechanism == "DESMAC64") { return new CbcBlockCipherMac(new DesEngine(), 64); } if (mechanism == "DESEDECMAC") { return new CMac(new DesEdeEngine()); } if (mechanism == "DESEDEMAC") { return new CbcBlockCipherMac(new DesEdeEngine()); } if (mechanism == "DESEDEMAC/CFB8") { return new CfbBlockCipherMac(new DesEdeEngine()); } if (mechanism == "DESEDEMAC64") { return new CbcBlockCipherMac(new DesEdeEngine(), 64); } if (mechanism == "DESEDEMAC64WITHISO7816-4PADDING") { return new CbcBlockCipherMac(new DesEdeEngine(), 64, new ISO7816d4Padding()); } if (mechanism == "DESWITHISO9797" || mechanism == "ISO9797ALG3MAC") { return new ISO9797Alg3Mac(new DesEngine()); } if (mechanism == "ISO9797ALG3WITHISO7816-4PADDING") { return new ISO9797Alg3Mac(new DesEngine(), new ISO7816d4Padding()); } if (mechanism == "SKIPJACKMAC") { return new CbcBlockCipherMac(new SkipjackEngine()); } if (mechanism == "SKIPJACKMAC/CFB8") { return new CfbBlockCipherMac(new SkipjackEngine()); } if (mechanism == "IDEAMAC") { return new CbcBlockCipherMac(new IdeaEngine()); } if (mechanism == "IDEAMAC/CFB8") { return new CfbBlockCipherMac(new IdeaEngine()); } if (mechanism == "RC2MAC") { return new CbcBlockCipherMac(new RC2Engine()); } if (mechanism == "RC2MAC/CFB8") { return new CfbBlockCipherMac(new RC2Engine()); } if (mechanism == "RC5MAC") { return new CbcBlockCipherMac(new RC532Engine()); } if (mechanism == "RC5MAC/CFB8") { return new CfbBlockCipherMac(new RC532Engine()); } if (mechanism == "GOST28147MAC") { return new Gost28147Mac(); } if (mechanism == "VMPCMAC") { return new VmpcMac(); } if (mechanism == "SIPHASH-2-4") { return new SipHash(); } throw new SecurityUtilityException("Mac " + mechanism + " not recognised."); } public static string GetAlgorithmName( DerObjectIdentifier oid) { return (string) algorithms[oid.Id]; } public static byte[] CalculateMac(string algorithm, ICipherParameters cp, byte[] input) { IMac mac = GetMac(algorithm); mac.Init(cp); mac.BlockUpdate(input, 0, input.Length); return DoFinal(mac); } public static byte[] DoFinal(IMac mac) { byte[] b = new byte[mac.GetMacSize()]; mac.DoFinal(b, 0); return b; } public static byte[] DoFinal(IMac mac, byte[] input) { mac.BlockUpdate(input, 0, input.Length); return DoFinal(mac); } } }