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);
}