protected virtual ISigner MakeSigner(SignatureAndHashAlgorithm algorithm, bool raw, bool forSigning, ICipherParameters cp) { if ((algorithm != null) != TlsUtilities.IsTlsV12(mContext)) { throw new InvalidOperationException(); } if (algorithm != null && algorithm.Signature != SignatureAlgorithm.rsa) { throw new InvalidOperationException(); } IDigest d; if (raw) { d = new NullDigest(); } else if (algorithm == null) { d = new CombinedHash(); } else { d = TlsUtilities.CreateHash(algorithm.Hash); } ISigner s; if (algorithm != null) { /* * RFC 5246 4.7. In RSA signing, the opaque vector contains the signature generated * using the RSASSA-PKCS1-v1_5 signature scheme defined in [PKCS1]. */ s = new RsaDigestSigner(d, TlsUtilities.GetOidForHashAlgorithm(algorithm.Hash)); } else { /* * RFC 5246 4.7. Note that earlier versions of TLS used a different RSA signature scheme * that did not include a DigestInfo encoding. */ s = new GenericSigner(CreateRsaImpl(), d); } s.Init(forSigning, cp); return(s); }
protected virtual ISigner MakeSigner(SignatureAndHashAlgorithm algorithm, bool raw, bool forSigning, ICipherParameters cp) { if (algorithm != null != TlsUtilities.IsTlsV12(mContext)) { throw new InvalidOperationException(); } if (algorithm != null && algorithm.Signature != 1) { throw new InvalidOperationException(); } IDigest digest = raw ? new NullDigest() : ((algorithm != null) ? TlsUtilities.CreateHash(algorithm.Hash) : new CombinedHash()); ISigner signer = (algorithm == null) ? ((ISigner) new GenericSigner(CreateRsaImpl(), digest)) : ((ISigner) new RsaDigestSigner(digest, TlsUtilities.GetOidForHashAlgorithm(algorithm.Hash))); signer.Init(forSigning, cp); return(signer); }