public static bool DoVerifyEcDsaSha256P256_old(IEnumerable <BufLen> bufs, I2PSigningPublicKey key, I2PSignature signed)
{
if (!SupportedSignatureType(signed.Certificate.SignatureType))
{
throw new NotImplementedException();
}
var sha = new Sha256Digest();
foreach (var buf in bufs)
{
sha.BlockUpdate(buf.BaseArray, buf.BaseArrayOffset, buf.Length);
}
var hash = new byte[sha.GetDigestSize()];
sha.DoFinal(hash, 0);
var p = Org.BouncyCastle.Asn1.Nist.NistNamedCurves.GetByName("P-256");
var param = new ECDomainParameters(p.Curve, p.G, p.N, p.H);
var pk = new ECPublicKeyParameters(p.Curve.DecodePoint(key.ToByteArray()), param);
var dsa = new Org.BouncyCastle.Crypto.Signers.DsaSigner();
var sigsize = signed.Certificate.SignatureLength;
var r = new BigInteger(1, signed.Sig.BaseArray, signed.Sig.BaseArrayOffset + 0, sigsize / 2);
var s = new BigInteger(1, signed.Sig.BaseArray, signed.Sig.BaseArrayOffset + sigsize / 2, sigsize / 2);
dsa.Init(false, pk);
var result = dsa.VerifySignature(hash, r, s);
DebugUtils.LogDebug("DoVerifyEcDsaSha256P256: " + result.ToString());
return(result);
}
public static bool DoVerifyEcDsa(
IEnumerable <BufLen> bufs,
I2PSigningPublicKey key,
I2PSignature signed,
IDigest digest,
X9ECParameters ecparam)
{
if (!SupportedSignatureType(signed.Certificate.SignatureType))
{
throw new NotImplementedException();
}
foreach (var buf in bufs)
{
digest.BlockUpdate(buf.BaseArray, buf.BaseArrayOffset, buf.Length);
}
var hash = new byte[digest.GetDigestSize()];
digest.DoFinal(hash, 0);
var param = new ECDomainParameters(ecparam.Curve, ecparam.G, ecparam.N, ecparam.H);
var pk = new ECPublicKeyParameters(ecparam.Curve.DecodePoint(key.ToByteArray()), param);
var dsa = new Org.BouncyCastle.Crypto.Signers.DsaSigner();
var sigsize = signed.Certificate.SignatureLength;
var r = new BigInteger(1, signed.Sig.BaseArray, signed.Sig.BaseArrayOffset, sigsize / 2);
var s = new BigInteger(1, signed.Sig.BaseArray, signed.Sig.BaseArrayOffset + sigsize / 2, sigsize / 2);
dsa.Init(false, pk);
var result = dsa.VerifySignature(hash, r, s);
DebugUtils.LogDebug("DoVerifyEcDsa: " + result.ToString() + ": " + digest.ToString());
return(result);
}
public static bool DoVerifyEdDSASHA512Ed25519(IEnumerable <BufLen> bufs, I2PSigningPublicKey key, I2PSignature signed)
{
return(Chaos.NaCl.Ed25519.Verify(
signed.Sig.ToByteArray(),
bufs.SelectMany(b =>
b
.ToByteArray())
.ToArray(),
key.ToByteArray()));
}
