227 lines
9.8 KiB
C#
227 lines
9.8 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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using System;
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using System.Collections;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.CryptoPro;
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using Org.BouncyCastle.Asn1.Nist;
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using Org.BouncyCastle.Asn1.Pkcs;
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using Org.BouncyCastle.Asn1.Oiw;
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using Org.BouncyCastle.Asn1.TeleTrust;
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using Org.BouncyCastle.Security;
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using Org.BouncyCastle.Crypto.Digests;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Security
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{
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/// <remarks>
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/// Utility class for creating IDigest objects from their names/Oids
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/// </remarks>
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public sealed class DigestUtilities
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{
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private enum DigestAlgorithm {
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GOST3411,
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KECCAK_224, KECCAK_256, KECCAK_288, KECCAK_384, KECCAK_512,
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MD2, MD4, MD5,
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RIPEMD128, RIPEMD160, RIPEMD256, RIPEMD320,
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SHA_1, SHA_224, SHA_256, SHA_384, SHA_512,
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SHA_512_224, SHA_512_256,
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SHA3_224, SHA3_256, SHA3_384, SHA3_512,
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SHAKE128, SHAKE256,
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TIGER,
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WHIRLPOOL,
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};
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private DigestUtilities()
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{
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}
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private static readonly IDictionary algorithms = Platform.CreateHashtable();
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private static readonly IDictionary oids = Platform.CreateHashtable();
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static DigestUtilities()
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{
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// Signal to obfuscation tools not to change enum constants
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((DigestAlgorithm)Enums.GetArbitraryValue(typeof(DigestAlgorithm))).ToString();
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algorithms[PkcsObjectIdentifiers.MD2.Id] = "MD2";
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algorithms[PkcsObjectIdentifiers.MD4.Id] = "MD4";
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algorithms[PkcsObjectIdentifiers.MD5.Id] = "MD5";
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algorithms["SHA1"] = "SHA-1";
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algorithms[OiwObjectIdentifiers.IdSha1.Id] = "SHA-1";
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algorithms["SHA224"] = "SHA-224";
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algorithms[NistObjectIdentifiers.IdSha224.Id] = "SHA-224";
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algorithms["SHA256"] = "SHA-256";
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algorithms[NistObjectIdentifiers.IdSha256.Id] = "SHA-256";
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algorithms["SHA384"] = "SHA-384";
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algorithms[NistObjectIdentifiers.IdSha384.Id] = "SHA-384";
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algorithms["SHA512"] = "SHA-512";
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algorithms[NistObjectIdentifiers.IdSha512.Id] = "SHA-512";
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algorithms["SHA512/224"] = "SHA-512/224";
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algorithms[NistObjectIdentifiers.IdSha512_224.Id] = "SHA-512/224";
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algorithms["SHA512/256"] = "SHA-512/256";
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algorithms[NistObjectIdentifiers.IdSha512_256.Id] = "SHA-512/256";
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algorithms["RIPEMD-128"] = "RIPEMD128";
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algorithms[TeleTrusTObjectIdentifiers.RipeMD128.Id] = "RIPEMD128";
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algorithms["RIPEMD-160"] = "RIPEMD160";
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algorithms[TeleTrusTObjectIdentifiers.RipeMD160.Id] = "RIPEMD160";
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algorithms["RIPEMD-256"] = "RIPEMD256";
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algorithms[TeleTrusTObjectIdentifiers.RipeMD256.Id] = "RIPEMD256";
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algorithms["RIPEMD-320"] = "RIPEMD320";
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// algorithms[TeleTrusTObjectIdentifiers.RipeMD320.Id] = "RIPEMD320";
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algorithms[CryptoProObjectIdentifiers.GostR3411.Id] = "GOST3411";
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algorithms[NistObjectIdentifiers.IdSha3_224.Id] = "SHA3-224";
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algorithms[NistObjectIdentifiers.IdSha3_256.Id] = "SHA3-256";
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algorithms[NistObjectIdentifiers.IdSha3_384.Id] = "SHA3-384";
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algorithms[NistObjectIdentifiers.IdSha3_512.Id] = "SHA3-512";
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algorithms[NistObjectIdentifiers.IdShake128.Id] = "SHAKE128";
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algorithms[NistObjectIdentifiers.IdShake256.Id] = "SHAKE256";
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oids["MD2"] = PkcsObjectIdentifiers.MD2;
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oids["MD4"] = PkcsObjectIdentifiers.MD4;
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oids["MD5"] = PkcsObjectIdentifiers.MD5;
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oids["SHA-1"] = OiwObjectIdentifiers.IdSha1;
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oids["SHA-224"] = NistObjectIdentifiers.IdSha224;
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oids["SHA-256"] = NistObjectIdentifiers.IdSha256;
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oids["SHA-384"] = NistObjectIdentifiers.IdSha384;
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oids["SHA-512"] = NistObjectIdentifiers.IdSha512;
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oids["SHA-512/224"] = NistObjectIdentifiers.IdSha512_224;
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oids["SHA-512/256"] = NistObjectIdentifiers.IdSha512_256;
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oids["SHA3-224"] = NistObjectIdentifiers.IdSha3_224;
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oids["SHA3-256"] = NistObjectIdentifiers.IdSha3_256;
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oids["SHA3-384"] = NistObjectIdentifiers.IdSha3_384;
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oids["SHA3-512"] = NistObjectIdentifiers.IdSha3_512;
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oids["SHAKE128"] = NistObjectIdentifiers.IdShake128;
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oids["SHAKE256"] = NistObjectIdentifiers.IdShake256;
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oids["RIPEMD128"] = TeleTrusTObjectIdentifiers.RipeMD128;
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oids["RIPEMD160"] = TeleTrusTObjectIdentifiers.RipeMD160;
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oids["RIPEMD256"] = TeleTrusTObjectIdentifiers.RipeMD256;
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oids["GOST3411"] = CryptoProObjectIdentifiers.GostR3411;
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}
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/// <summary>
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/// Returns a ObjectIdentifier for a given digest mechanism.
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/// </summary>
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/// <param name="mechanism">A string representation of the digest meanism.</param>
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/// <returns>A DerObjectIdentifier, null if the Oid is not available.</returns>
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public static DerObjectIdentifier GetObjectIdentifier(
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string mechanism)
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{
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if (mechanism == null)
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throw new System.ArgumentNullException("mechanism");
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mechanism = Platform.ToUpperInvariant(mechanism);
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string aliased = (string) algorithms[mechanism];
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if (aliased != null)
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mechanism = aliased;
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return (DerObjectIdentifier) oids[mechanism];
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}
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public static ICollection Algorithms
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{
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get { return oids.Keys; }
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}
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public static IDigest GetDigest(
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DerObjectIdentifier id)
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{
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return GetDigest(id.Id);
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}
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public static IDigest GetDigest(
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string algorithm)
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{
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string upper = Platform.ToUpperInvariant(algorithm);
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string mechanism = (string) algorithms[upper];
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if (mechanism == null)
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{
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mechanism = upper;
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}
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try
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{
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DigestAlgorithm digestAlgorithm = (DigestAlgorithm)Enums.GetEnumValue(
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typeof(DigestAlgorithm), mechanism);
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switch (digestAlgorithm)
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{
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case DigestAlgorithm.GOST3411: return new Gost3411Digest();
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case DigestAlgorithm.KECCAK_224: return new KeccakDigest(224);
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case DigestAlgorithm.KECCAK_256: return new KeccakDigest(256);
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case DigestAlgorithm.KECCAK_288: return new KeccakDigest(288);
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case DigestAlgorithm.KECCAK_384: return new KeccakDigest(384);
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case DigestAlgorithm.KECCAK_512: return new KeccakDigest(512);
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case DigestAlgorithm.MD2: return new MD2Digest();
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case DigestAlgorithm.MD4: return new MD4Digest();
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case DigestAlgorithm.MD5: return new MD5Digest();
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case DigestAlgorithm.RIPEMD128: return new RipeMD128Digest();
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case DigestAlgorithm.RIPEMD160: return new RipeMD160Digest();
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case DigestAlgorithm.RIPEMD256: return new RipeMD256Digest();
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case DigestAlgorithm.RIPEMD320: return new RipeMD320Digest();
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case DigestAlgorithm.SHA_1: return new Sha1Digest();
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case DigestAlgorithm.SHA_224: return new Sha224Digest();
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case DigestAlgorithm.SHA_256: return new Sha256Digest();
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case DigestAlgorithm.SHA_384: return new Sha384Digest();
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case DigestAlgorithm.SHA_512: return new Sha512Digest();
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case DigestAlgorithm.SHA_512_224: return new Sha512tDigest(224);
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case DigestAlgorithm.SHA_512_256: return new Sha512tDigest(256);
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case DigestAlgorithm.SHA3_224: return new Sha3Digest(224);
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case DigestAlgorithm.SHA3_256: return new Sha3Digest(256);
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case DigestAlgorithm.SHA3_384: return new Sha3Digest(384);
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case DigestAlgorithm.SHA3_512: return new Sha3Digest(512);
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case DigestAlgorithm.SHAKE128: return new ShakeDigest(128);
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case DigestAlgorithm.SHAKE256: return new ShakeDigest(256);
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case DigestAlgorithm.TIGER: return new TigerDigest();
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case DigestAlgorithm.WHIRLPOOL: return new WhirlpoolDigest();
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}
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}
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catch (ArgumentException)
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{
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}
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throw new SecurityUtilityException("Digest " + mechanism + " not recognised.");
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}
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public static string GetAlgorithmName(
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DerObjectIdentifier oid)
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{
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return (string) algorithms[oid.Id];
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}
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public static byte[] CalculateDigest(string algorithm, byte[] input)
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{
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IDigest digest = GetDigest(algorithm);
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digest.BlockUpdate(input, 0, input.Length);
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return DoFinal(digest);
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}
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public static byte[] DoFinal(
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IDigest digest)
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{
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byte[] b = new byte[digest.GetDigestSize()];
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digest.DoFinal(b, 0);
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return b;
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}
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public static byte[] DoFinal(
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IDigest digest,
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byte[] input)
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{
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digest.BlockUpdate(input, 0, input.Length);
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return DoFinal(digest);
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}
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}
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}
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#endif
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