59 lines
2.1 KiB
C#
59 lines
2.1 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Digests;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Signers;
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namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Tls.Crypto.Impl.BC
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{
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/// <summary>BC light-weight base class for the signers implementing the two DSA style algorithms from FIPS PUB
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/// 186-4: DSA and ECDSA.</summary>
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public abstract class BcTlsDssSigner
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: BcTlsSigner
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{
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protected BcTlsDssSigner(BcTlsCrypto crypto, AsymmetricKeyParameter privateKey)
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: base(crypto, privateKey)
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{
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}
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protected abstract IDsa CreateDsaImpl(int cryptoHashAlgorithm);
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protected abstract short SignatureAlgorithm { get; }
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public override byte[] GenerateRawSignature(SignatureAndHashAlgorithm algorithm, byte[] hash)
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{
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if (algorithm != null && algorithm.Signature != SignatureAlgorithm)
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throw new InvalidOperationException("Invalid algorithm: " + algorithm);
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int cryptoHashAlgorithm = (null == algorithm)
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? CryptoHashAlgorithm.sha1
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: TlsCryptoUtilities.GetHash(algorithm.Hash);
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ISigner signer = new DsaDigestSigner(CreateDsaImpl(cryptoHashAlgorithm), new NullDigest());
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signer.Init(true, new ParametersWithRandom(m_privateKey, m_crypto.SecureRandom));
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if (algorithm == null)
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{
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// Note: Only use the SHA1 part of the (MD5/SHA1) hash
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signer.BlockUpdate(hash, 16, 20);
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}
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else
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{
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signer.BlockUpdate(hash, 0, hash.Length);
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}
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try
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{
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return signer.GenerateSignature();
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}
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catch (CryptoException e)
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{
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throw new TlsFatalAlert(AlertDescription.internal_error, e);
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}
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}
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}
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}
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#pragma warning restore
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#endif
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