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- /* SPDX-License-Identifier: MIT */
- /*
- * Copyright (C) 2016 The Android Open Source Project
- */
- #ifdef AVB_INSIDE_LIBAVB_H
- #error "You can't include avb_sha.h in the public header libavb.h."
- #endif
- #ifndef AVB_COMPILATION
- #error "Never include this file, it may only be used from internal avb code."
- #endif
- #ifndef AVB_SHA_H_
- #define AVB_SHA_H_
- #ifdef __cplusplus
- extern "C" {
- #endif
- #include "avb_crypto.h"
- #include "avb_sysdeps.h"
- /* Block size in bytes of a SHA-256 digest. */
- #define AVB_SHA256_BLOCK_SIZE 64
- /* Block size in bytes of a SHA-512 digest. */
- #define AVB_SHA512_BLOCK_SIZE 128
- /* Data structure used for SHA-256. */
- typedef struct {
- uint32_t h[8];
- uint64_t tot_len;
- size_t len;
- uint8_t block[2 * AVB_SHA256_BLOCK_SIZE];
- uint8_t buf[AVB_SHA256_DIGEST_SIZE]; /* Used for storing the final digest. */
- } AvbSHA256Ctx;
- /* Data structure used for SHA-512. */
- typedef struct {
- uint64_t h[8];
- uint64_t tot_len;
- size_t len;
- uint8_t block[2 * AVB_SHA512_BLOCK_SIZE];
- uint8_t buf[AVB_SHA512_DIGEST_SIZE]; /* Used for storing the final digest. */
- } AvbSHA512Ctx;
- /* Initializes the SHA-256 context. */
- void avb_sha256_init(AvbSHA256Ctx* ctx);
- /* Updates the SHA-256 context with |len| bytes from |data|. */
- void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, size_t len);
- /* Returns the SHA-256 digest. */
- uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
- /* Initializes the SHA-512 context. */
- void avb_sha512_init(AvbSHA512Ctx* ctx);
- /* Updates the SHA-512 context with |len| bytes from |data|. */
- void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, size_t len);
- /* Returns the SHA-512 digest. */
- uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
- #ifdef __cplusplus
- }
- #endif
- #endif /* AVB_SHA_H_ */
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