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 18 extern "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. */ 32 typedef struct { 33 uint32_t h[8]; 34 uint32_t tot_len; 35 uint32_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. */ 41 typedef struct { 42 uint64_t h[8]; 43 uint32_t tot_len; 44 uint32_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. */ 50 void avb_sha256_init(AvbSHA256Ctx* ctx); 51 52 /* Updates the SHA-256 context with |len| bytes from |data|. */ 53 void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, uint32_t len); 54 55 /* Returns the SHA-256 digest. */ 56 uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; 57 58 /* Initializes the SHA-512 context. */ 59 void avb_sha512_init(AvbSHA512Ctx* ctx); 60 61 /* Updates the SHA-512 context with |len| bytes from |data|. */ 62 void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len); 63 64 /* Returns the SHA-512 digest. */ 65 uint8_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
