- Initial commit

Runtime/3rdParty/BouncyCastle/tls/crypto/impl/bc/BcTlsRsaPssVerifier.cs

@@ -0,0 +1,45 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Signers;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Tls.Crypto.Impl.BC
+{
+    /// <summary>Operator supporting the verification of RSASSA-PSS signatures using the BC light-weight API.</summary>
+    public class BcTlsRsaPssVerifier
+        : BcTlsVerifier
+    {
+        private readonly int m_signatureScheme;
+
+        public BcTlsRsaPssVerifier(BcTlsCrypto crypto, RsaKeyParameters publicKey, int signatureScheme)
+            : base(crypto, publicKey)
+        {
+            if (!SignatureScheme.IsRsaPss(signatureScheme))
+                throw new ArgumentException("signatureScheme");
+
+            this.m_signatureScheme = signatureScheme;
+        }
+
+        public override bool VerifyRawSignature(DigitallySigned digitallySigned, byte[] hash)
+        {
+            SignatureAndHashAlgorithm algorithm = digitallySigned.Algorithm;
+            if (algorithm == null || SignatureScheme.From(algorithm) != m_signatureScheme)
+                throw new InvalidOperationException("Invalid algorithm: " + algorithm);
+
+            int cryptoHashAlgorithm = SignatureScheme.GetCryptoHashAlgorithm(m_signatureScheme);
+            IDigest digest = m_crypto.CreateDigest(cryptoHashAlgorithm);
+
+            PssSigner verifier = PssSigner.CreateRawSigner(new RsaEngine(), digest, digest, digest.GetDigestSize(),
+                PssSigner.TrailerImplicit);
+            verifier.Init(false, m_publicKey);
+            verifier.BlockUpdate(hash, 0, hash.Length);
+            return verifier.VerifySignature(digitallySigned.Signature);
+        }
+    }
+}
+#pragma warning restore
+#endif