public sealed override void Dispose(bool disposing)
{
if (disposing)
{
if (_hmacCtx != null)
{
_hmacCtx.Dispose();
_hmacCtx = null;
}
}
}
public unsafe HmacHashProvider(IntPtr algorithmEvp, byte[] key)
{
Debug.Assert(algorithmEvp != IntPtr.Zero);
Debug.Assert(key != null);
_hashSize = Interop.Crypto.EvpMdSize(algorithmEvp);
if (_hashSize <= 0 || _hashSize > Interop.Crypto.EVP_MAX_MD_SIZE)
{
throw new CryptographicException();
}
fixed (byte* keyPtr = key)
{
_hmacCtx = Interop.Crypto.HmacCreate(keyPtr, key.Length, algorithmEvp);
Interop.libcrypto.CheckValidOpenSslHandle(_hmacCtx);
}
}
internal extern static unsafe int HmacUpdate(SafeHmacCtxHandle ctx, byte* data, int len);
internal extern static unsafe int HmacFinal(SafeHmacCtxHandle ctx, byte* data, ref int len);
internal extern static int HmacReset(SafeHmacCtxHandle ctx);