BestHTTP.SecureProtocol.Org.BouncyCastle.Security.DigestUtilities.GetDigest C# (CSharp) Метод

        public static IDigest GetDigest(
            DerObjectIdentifier id)
        {
            return GetDigest(id.Id);
        }

        public static IMac GetMac(
            string algorithm)
        {
            string upper = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.ToUpperInvariant(algorithm);

            string mechanism = (string)algorithms[upper];

            if (mechanism == null)
            {
                mechanism = upper;
            }

            if (BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.StartsWith(mechanism, "PBEWITH"))
            {
                mechanism = mechanism.Substring("PBEWITH".Length);
            }

            if (BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.StartsWith(mechanism, "HMAC"))
            {
                string digestName;
                if (BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.StartsWith(mechanism, "HMAC-") || BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.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.");
        }