/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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#ifdef AVB_INSIDE_LIBAVB_H
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#error "You can't include avb_sha.h in the public header libavb.h."
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#endif
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#ifndef AVB_COMPILATION
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#error "Never include this file, it may only be used from internal avb code."
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#endif
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*/
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#ifndef AVB_SHA_H_
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#define AVB_SHA_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "avb_crypto.h"
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#include "avb_sysdeps.h"
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/* Block size in bytes of a SHA-256 digest. */
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#define AVB_SHA256_BLOCK_SIZE 64
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/* Block size in bytes of a SHA-512 digest. */
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#define AVB_SHA512_BLOCK_SIZE 128
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/* Data structure used for SHA-256. */
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typedef struct {
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uint32_t h[8];
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uint32_t tot_len;
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uint32_t len;
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uint8_t block[2 * AVB_SHA256_BLOCK_SIZE];
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uint8_t buf[AVB_SHA256_DIGEST_SIZE]; /* Used for storing the final digest. */
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} AvbSHA256Ctx;
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/* Data structure used for SHA-512. */
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typedef struct {
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uint64_t h[8];
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uint32_t tot_len;
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uint32_t len;
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uint8_t block[2 * AVB_SHA512_BLOCK_SIZE];
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uint8_t buf[AVB_SHA512_DIGEST_SIZE]; /* Used for storing the final digest. */
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} AvbSHA512Ctx;
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/* Initializes the SHA-256 context. */
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void avb_sha256_init(AvbSHA256Ctx* ctx);
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/* Updates the SHA-256 context with |len| bytes from |data|. */
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void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, uint32_t len);
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/* Returns the SHA-256 digest. */
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uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
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/* Initializes the SHA-512 context. */
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void avb_sha512_init(AvbSHA512Ctx* ctx);
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/* Updates the SHA-512 context with |len| bytes from |data|. */
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void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len);
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/* Returns the SHA-512 digest. */
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uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
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#ifdef __cplusplus
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}
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#endif
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#endif /* AVB_SHA_H_ */
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