public static EVP_MD_CTX EVP_MD_CTX_new(EVP_HashType hashType)
{
var ctx = EVP_MD_CTX_new();
var result = EVP_DigestInit_ex(ctx, hashType, IntPtr.Zero);
ThrowOnErrorReturnCode(result);
return(ctx);
}
public unsafe static int HMAC(EVP_HashType evp, ReadOnlySpan <byte> key, ReadOnlySpan <byte> data, Span <byte> output)
{
fixed(void *keyPtr = &key.DangerousGetPinnableReference())
fixed(void *dataPtr = &data.DangerousGetPinnableReference())
fixed(void *outputPtr = &output.DangerousGetPinnableReference())
{
var outputLength = output.Length;
var result = HMAC(evp, keyPtr, key.Length, dataPtr, data.Length, outputPtr, ref outputLength);
ThrowOnNullPointer(result);
return(outputLength);
}
}
internal OpenSslHash(EVP_HashType hashTypePointer, int size, HashType hashType)
{
_hashType = hashType;
_ctx = EVP_MD_CTX_new(hashTypePointer);
_size = size;
}
private static extern int EVP_DigestInit_ex(EVP_MD_CTX ctx, EVP_HashType type, IntPtr impl);
private static extern unsafe void *HMAC(EVP_HashType evp_md, void *key, int key_len, void *d, int n, void *md, ref int md_len);
