internal LiteHmac(PAL_HashAlgorithm algorithm, ReadOnlySpan <byte> key, bool preinitialize)
{
int hashSizeInBytes = 0;
_ctx = Interop.AppleCrypto.HmacCreate(algorithm, ref hashSizeInBytes);
if (hashSizeInBytes < 0)
{
_ctx.Dispose();
throw new PlatformNotSupportedException(
SR.Format(
SR.Cryptography_UnknownHashAlgorithm,
Enum.GetName(typeof(Interop.AppleCrypto.PAL_HashAlgorithm), algorithm)));
}
if (_ctx.IsInvalid)
{
_ctx.Dispose();
throw new CryptographicException();
}
if (preinitialize)
{
if (Interop.AppleCrypto.HmacInit(_ctx, key) != Success)
{
_ctx.Dispose();
throw new CryptographicException();
}
}
_hashSizeInBytes = hashSizeInBytes;
}
public override void Dispose(bool disposing)
{
if (disposing)
{
_ctx?.Dispose();
Array.Clear(_key, 0, _key.Length);
}
}
internal AppleHmacProvider(Interop.AppleCrypto.PAL_HashAlgorithm algorithm, byte[] key)
{
_key = key.CloneByteArray();
int hashSizeInBytes = 0;
_ctx = Interop.AppleCrypto.HmacCreate(algorithm, ref hashSizeInBytes);
if (hashSizeInBytes < 0)
{
_ctx.Dispose();
throw new PlatformNotSupportedException(
SR.Format(
SR.Cryptography_UnknownHashAlgorithm,
Enum.GetName(typeof(Interop.AppleCrypto.PAL_HashAlgorithm), algorithm)));
}
if (_ctx.IsInvalid)
{
_ctx.Dispose();
throw new CryptographicException();
}
HashSizeInBytes = hashSizeInBytes;
}
public void Dispose()
{
_ctx.Dispose();
}