protected override bool VerifySignatureCore(
ReadOnlySpan <byte> hash,
ReadOnlySpan <byte> signature,
DSASignatureFormat signatureFormat)
{
Span <byte> stackBuf = stackalloc byte[WindowsMaxQSize];
ReadOnlySpan <byte> source = AdjustHashSizeIfNecessary(hash, stackBuf);
if (signatureFormat == DSASignatureFormat.Rfc3279DerSequence)
{
// source.Length is the field size, in bytes, so just convert to bits.
int fieldSizeBits = source.Length * 8;
signature = this.ConvertSignatureToIeeeP1363(signatureFormat, signature, fieldSizeBits);
}
else if (signatureFormat != DSASignatureFormat.IeeeP1363FixedFieldConcatenation)
{
Debug.Fail($"Missing internal implementation handler for signature format {signatureFormat}");
throw new CryptographicException(
SR.Cryptography_UnknownSignatureFormat,
signatureFormat.ToString());
}
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
unsafe
{
return(CngCommon.VerifyHash(keyHandle, source, signature, AsymmetricPaddingMode.None, null));
}
}
}
public override bool VerifySignature(ReadOnlySpan <byte> hash, ReadOnlySpan <byte> signature)
{
Span <byte> stackBuf = stackalloc byte[WindowsMaxQSize];
ReadOnlySpan <byte> source = AdjustHashSizeIfNecessary(hash, stackBuf);
#endif
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
unsafe
{
return(CngCommon.VerifyHash(keyHandle, source, signature, AsymmetricPaddingMode.None, null));
}
}
}
public override bool VerifySignature(ReadOnlySpan <byte> hash, ReadOnlySpan <byte> signature)
{
byte[] arrayToReturnToArrayPool = AdjustHashSizeIfNecessaryWithArrayPool(ref hash);
try
{
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
unsafe
{
return(CngCommon.VerifyHash(keyHandle, hash, signature, AsymmetricPaddingMode.None, null));
}
}
}
finally
{
if (arrayToReturnToArrayPool != null)
{
Array.Clear(arrayToReturnToArrayPool, 0, hash.Length);
ArrayPool <byte> .Shared.Return(arrayToReturnToArrayPool);
}
}
}
public override bool VerifySignature(byte[] hash, byte[] signature)
{
if (hash == null)
{
throw new ArgumentNullException(nameof(hash));
}
if (signature == null)
{
throw new ArgumentNullException(nameof(signature));
}
hash = AdjustHashSizeIfNecessary(hash);
using (SafeNCryptKeyHandle keyHandle = GetDuplicatedKeyHandle())
{
unsafe
{
bool verified = CngCommon.VerifyHash(keyHandle, hash, signature, AsymmetricPaddingMode.None, null);
return(verified);
}
}
}
