public static unsafe int HashData(string hashAlgorithmId, ReadOnlySpan <byte> source, Span <byte> destination)
{
int hashSize; // in bytes
// Try using a pseudo-handle if available.
if (!s_useCompatOneShot)
{
if (HashDataUsingPseudoHandle(hashAlgorithmId, source, destination, out hashSize))
{
return(hashSize);
}
}
// Pseudo-handle not available or a precondition check failed.
// Fall back to a shared handle with no using or dispose.
SafeBCryptAlgorithmHandle cachedAlgorithmHandle = BCryptAlgorithmCache.GetCachedBCryptAlgorithmHandle(
hashAlgorithmId,
BCryptOpenAlgorithmProviderFlags.None,
out hashSize);
if (destination.Length < hashSize)
{
throw new CryptographicException();
}
HashUpdateAndFinish(cachedAlgorithmHandle, hashSize, source, destination);
return(hashSize);
}
public static unsafe int HashData(string hashAlgorithmId, ReadOnlySpan <byte> source, Span <byte> destination)
{
int hashSize; // in bytes
// Try using a pseudo-handle if available.
if (Interop.BCrypt.PseudoHandlesSupported)
{
HashDataUsingPseudoHandle(hashAlgorithmId, source, destination, out hashSize);
return(hashSize);
}
else
{
// Pseudo-handle not available. Fall back to a shared handle with no using or dispose.
SafeBCryptAlgorithmHandle cachedAlgorithmHandle = BCryptAlgorithmCache.GetCachedBCryptAlgorithmHandle(
hashAlgorithmId,
BCryptOpenAlgorithmProviderFlags.None,
out hashSize);
if (destination.Length < hashSize)
{
Debug.Fail("Caller should have checked length.");
throw new CryptographicException();
}
HashUpdateAndFinish(cachedAlgorithmHandle, hashSize, source, destination);
return(hashSize);
}
}
public static unsafe int HashData(string hashAlgorithmId, ReadOnlySpan <byte> source, Span <byte> destination)
{
// Shared handle, no using or dispose.
SafeBCryptAlgorithmHandle cachedAlgorithmHandle = BCryptAlgorithmCache.GetCachedBCryptAlgorithmHandle(
hashAlgorithmId,
BCryptOpenAlgorithmProviderFlags.None);
int hashSize;
NTSTATUS ntStatus = Interop.BCrypt.BCryptGetProperty(
cachedAlgorithmHandle,
Interop.BCrypt.BCryptPropertyStrings.BCRYPT_HASH_LENGTH,
&hashSize,
sizeof(int),
out _,
0);
if (ntStatus != NTSTATUS.STATUS_SUCCESS)
{
throw Interop.BCrypt.CreateCryptographicException(ntStatus);
}
if (destination.Length < hashSize)
{
throw new CryptographicException();
}
if (!s_useCompatOneShot)
{
try
{
fixed(byte *pSource = source)
fixed(byte *pDestination = destination)
{
ntStatus = Interop.BCrypt.BCryptHash(cachedAlgorithmHandle, null, 0, pSource, source.Length, pDestination, hashSize);
if (ntStatus != NTSTATUS.STATUS_SUCCESS)
{
throw Interop.BCrypt.CreateCryptographicException(ntStatus);
}
}
return(hashSize);
}
catch (EntryPointNotFoundException)
{
s_useCompatOneShot = true;
}
}
Debug.Assert(s_useCompatOneShot);
HashUpdateAndFinish(cachedAlgorithmHandle, hashSize, source, destination);
return(hashSize);
}
