zircon/system/ulib/crypto/include/crypto/digest.h

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <stddef.h>

#include <zircon/types.h>

// |crypto::digest| is a cryptographic message digest algorithm.
// TODO(aarongreen): ZX-1266: Merge ulib/digest with ulib/crypto
namespace crypto {
namespace digest {

// Algorithm enumerates the supported message digests
enum Algorithm {
    kUninitialized = 0,
    kSHA256,
};

// Gets a pointer to the opaque crypto implementation of the digest algorithm.
zx_status_t GetDigest(Algorithm digest, uintptr_t* out);

// Gets the number of bytes needed for the digest produced by the given |version|.
zx_status_t GetDigestLen(Algorithm digest, size_t* out);

} // namespace digest
} // namespace crypto