| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Declaration of functions and data types used for SHA256 sum computing |
| 2 | library functions. |
| 3 | Copyright (C) 2007-2016 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef _SHA256_H |
| 21 | #define _SHA256_H 1 |
| 22 | |
| 23 | #include <limits.h> |
| 24 | #include <stdint.h> |
| 25 | #include <stdio.h> |
| 26 | #include <endian.h> |
| 27 | |
| 28 | |
| 29 | /* Structure to save state of computation between the single steps. */ |
| 30 | struct sha256_ctx |
| 31 | { |
| 32 | uint32_t H[8]; |
| 33 | |
| 34 | union |
| 35 | { |
| 36 | uint64_t total64; |
| 37 | #define TOTAL64_low (1 - (BYTE_ORDER == LITTLE_ENDIAN)) |
| 38 | #define TOTAL64_high (BYTE_ORDER == LITTLE_ENDIAN) |
| 39 | uint32_t total[2]; |
| 40 | }; |
| 41 | uint32_t buflen; |
| 42 | union |
| 43 | { |
| 44 | char buffer[128]; |
| 45 | uint32_t buffer32[32]; |
| 46 | uint64_t buffer64[16]; |
| 47 | }; |
| 48 | }; |
| 49 | |
| 50 | /* Initialize structure containing state of computation. |
| 51 | (FIPS 180-2: 5.3.2) */ |
| 52 | extern void __sha256_init_ctx (struct sha256_ctx *ctx) __THROW; |
| 53 | |
| 54 | /* Starting with the result of former calls of this function (or the |
| 55 | initialization function update the context for the next LEN bytes |
| 56 | starting at BUFFER. |
| 57 | It is NOT required that LEN is a multiple of 64. */ |
| 58 | extern void __sha256_process_bytes (const void *buffer, size_t len, |
| 59 | struct sha256_ctx *ctx) __THROW; |
| 60 | |
| 61 | /* Process the remaining bytes in the buffer and put result from CTX |
| 62 | in first 32 bytes following RESBUF. |
| 63 | |
| 64 | IMPORTANT: On some systems it is required that RESBUF is correctly |
| 65 | aligned for a 32 bits value. */ |
| 66 | extern void *__sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf) |
| 67 | __THROW; |
| 68 | |
| 69 | #endif /* sha256.h */ |