blob: c5a6a4c706489eaab86314a1c12c937243433e24
| 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person |
| 5 | * obtaining a copy of this software and associated documentation |
| 6 | * files (the "Software"), to deal in the Software without |
| 7 | * restriction, including without limitation the rights to use, copy, |
| 8 | * modify, merge, publish, distribute, sublicense, and/or sell copies |
| 9 | * of the Software, and to permit persons to whom the Software is |
| 10 | * furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 18 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 19 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 20 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 21 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #ifdef AVB_INSIDE_LIBAVB_H |
| 26 | #error "You can't include avb_sha.h in the public header libavb.h." |
| 27 | #endif |
| 28 | |
| 29 | #ifndef AVB_COMPILATION |
| 30 | #error "Never include this file, it may only be used from internal avb code." |
| 31 | #endif |
| 32 | |
| 33 | #ifndef AVB_SHA_H_ |
| 34 | #define AVB_SHA_H_ |
| 35 | |
| 36 | #ifdef __cplusplus |
| 37 | extern "C" { |
| 38 | #endif |
| 39 | |
| 40 | #include "avb_crypto.h" |
| 41 | #include "avb_sysdeps.h" |
| 42 | |
| 43 | /* Block size in bytes of a SHA-256 digest. */ |
| 44 | #define AVB_SHA256_BLOCK_SIZE 64 |
| 45 | |
| 46 | |
| 47 | /* Block size in bytes of a SHA-512 digest. */ |
| 48 | #define AVB_SHA512_BLOCK_SIZE 128 |
| 49 | |
| 50 | /* Data structure used for SHA-256. */ |
| 51 | typedef struct { |
| 52 | uint32_t h[8]; |
| 53 | uint32_t tot_len; |
| 54 | uint32_t len; |
| 55 | uint8_t block[2 * AVB_SHA256_BLOCK_SIZE]; |
| 56 | uint8_t buf[AVB_SHA256_DIGEST_SIZE]; /* Used for storing the final digest. */ |
| 57 | } AvbSHA256Ctx; |
| 58 | |
| 59 | /* Data structure used for SHA-512. */ |
| 60 | typedef struct { |
| 61 | uint64_t h[8]; |
| 62 | uint32_t tot_len; |
| 63 | uint32_t len; |
| 64 | uint8_t block[2 * AVB_SHA512_BLOCK_SIZE]; |
| 65 | uint8_t buf[AVB_SHA512_DIGEST_SIZE]; /* Used for storing the final digest. */ |
| 66 | } AvbSHA512Ctx; |
| 67 | |
| 68 | /* Initializes the SHA-256 context. */ |
| 69 | void avb_sha256_init(AvbSHA256Ctx* ctx); |
| 70 | |
| 71 | /* Updates the SHA-256 context with |len| bytes from |data|. */ |
| 72 | void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, uint32_t len); |
| 73 | |
| 74 | /* Returns the SHA-256 digest. */ |
| 75 | uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; |
| 76 | |
| 77 | /* Initializes the SHA-512 context. */ |
| 78 | void avb_sha512_init(AvbSHA512Ctx* ctx); |
| 79 | |
| 80 | /* Updates the SHA-512 context with |len| bytes from |data|. */ |
| 81 | void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len); |
| 82 | |
| 83 | /* Returns the SHA-512 digest. */ |
| 84 | uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; |
| 85 | |
| 86 | #ifdef __cplusplus |
| 87 | } |
| 88 | #endif |
| 89 | |
| 90 | #endif /* AVB_SHA_H_ */ |
| 91 |