1/* SPDX-License-Identifier: MIT */ 2/* 3 * Copyright (C) 2016 The Android Open Source Project 4 */ 5 6#ifdef AVB_INSIDE_LIBAVB_H 7#error "You can't include avb_sha.h in the public header libavb.h." 8#endif 9 10#ifndef AVB_COMPILATION 11#error "Never include this file, it may only be used from internal avb code." 12#endif 13 14#ifndef AVB_SHA_H_ 15#define AVB_SHA_H_ 16 17#ifdef __cplusplus 18extern "C" { 19#endif 20 21#include "avb_crypto.h" 22#include "avb_sysdeps.h" 23 24/* Block size in bytes of a SHA-256 digest. */ 25#define AVB_SHA256_BLOCK_SIZE 64 26 27 28/* Block size in bytes of a SHA-512 digest. */ 29#define AVB_SHA512_BLOCK_SIZE 128 30 31/* Data structure used for SHA-256. */ 32typedef struct { 33 uint32_t h[8]; 34 uint64_t tot_len; 35 size_t len; 36 uint8_t block[2 * AVB_SHA256_BLOCK_SIZE]; 37 uint8_t buf[AVB_SHA256_DIGEST_SIZE]; /* Used for storing the final digest. */ 38} AvbSHA256Ctx; 39 40/* Data structure used for SHA-512. */ 41typedef struct { 42 uint64_t h[8]; 43 uint64_t tot_len; 44 size_t len; 45 uint8_t block[2 * AVB_SHA512_BLOCK_SIZE]; 46 uint8_t buf[AVB_SHA512_DIGEST_SIZE]; /* Used for storing the final digest. */ 47} AvbSHA512Ctx; 48 49/* Initializes the SHA-256 context. */ 50void avb_sha256_init(AvbSHA256Ctx* ctx); 51 52/* Updates the SHA-256 context with |len| bytes from |data|. */ 53void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, size_t len); 54 55/* Returns the SHA-256 digest. */ 56uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; 57 58/* Initializes the SHA-512 context. */ 59void avb_sha512_init(AvbSHA512Ctx* ctx); 60 61/* Updates the SHA-512 context with |len| bytes from |data|. */ 62void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, size_t len); 63 64/* Returns the SHA-512 digest. */ 65uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; 66 67#ifdef __cplusplus 68} 69#endif 70 71#endif /* AVB_SHA_H_ */ 72