/// <inheritdoc />
public override bool VerifyHash(ReadOnlySpan <byte> publicKey, ReadOnlySpan <byte> hash,
ReadOnlySpan <byte> signature, ReadOnlySpan <byte> domain = default)
{
if (signature.Length != SignatureLength)
{
throw new ArgumentOutOfRangeException(nameof(signature), signature.Length,
$"Signature must be {SignatureLength} bytes long.");
}
EnsureInitialised();
var blsPublicKey = default(Bls384Interop.BlsPublicKey);
int publicKeyBytesRead;
unsafe
{
fixed(byte *publicKeyPtr = publicKey)
{
publicKeyBytesRead =
Bls384Interop.PublicKeyDeserialize(ref blsPublicKey, publicKeyPtr, publicKey !.Length);
}
}
if (publicKeyBytesRead != publicKey.Length)
{
throw new Exception($"Error deserializing BLS public key, length: {publicKeyBytesRead}");
}
var blsSignature = default(Bls384Interop.BlsSignature);
int signatureBytesRead;
unsafe
{
fixed(byte *signaturePtr = signature)
{
signatureBytesRead =
Bls384Interop.SignatureDeserialize(ref blsSignature, signaturePtr, SignatureLength);
}
}
if (signatureBytesRead != signature.Length)
{
throw new Exception($"Error deserializing BLS signature, length: {signatureBytesRead}");
}
int result;
if (domain.Length > 0)
{
if (hash.Length != HashLength)
{
throw new ArgumentOutOfRangeException(nameof(hash), hash.Length,
$"Hash with domain must be {HashLength} bytes long.");
}
if (domain.Length != DomainLength)
{
throw new ArgumentOutOfRangeException(nameof(domain), domain.Length,
$"Domain must be {DomainLength} bytes long.");
}
var hashWithDomain = new Span <byte>(new byte[HashLength + DomainLength]);
hash.CopyTo(hashWithDomain);
domain.CopyTo(hashWithDomain.Slice(HashLength));
unsafe
{
fixed(byte *hashPtr = hashWithDomain)
{
result = Bls384Interop.VerifyHashWithDomain(ref blsSignature, ref blsPublicKey, hashPtr);
}
}
}
else
{
unsafe
{
fixed(byte *hashPtr = hash)
{
result = Bls384Interop.VerifyHash(ref blsSignature, ref blsPublicKey, hashPtr, hash.Length);
}
}
}
return(result == 1);
}
