| /* Declaration of functions and data types used for SHA256 sum computing |
| library functions. |
| Copyright (C) 2007-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SHA256_H |
| #define _SHA256_H 1 |
| |
| #include <limits.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <endian.h> |
| |
| |
| /* Structure to save state of computation between the single steps. */ |
| struct sha256_ctx |
| { |
| uint32_t H[8]; |
| |
| union |
| { |
| uint64_t total64; |
| #define TOTAL64_low (1 - (BYTE_ORDER == LITTLE_ENDIAN)) |
| #define TOTAL64_high (BYTE_ORDER == LITTLE_ENDIAN) |
| uint32_t total[2]; |
| }; |
| uint32_t buflen; |
| union |
| { |
| char buffer[128]; |
| uint32_t buffer32[32]; |
| uint64_t buffer64[16]; |
| }; |
| }; |
| |
| /* Initialize structure containing state of computation. |
| (FIPS 180-2: 5.3.2) */ |
| extern void __sha256_init_ctx (struct sha256_ctx *ctx) __THROW; |
| |
| /* Starting with the result of former calls of this function (or the |
| initialization function update the context for the next LEN bytes |
| starting at BUFFER. |
| It is NOT required that LEN is a multiple of 64. */ |
| extern void __sha256_process_bytes (const void *buffer, size_t len, |
| struct sha256_ctx *ctx) __THROW; |
| |
| /* Process the remaining bytes in the buffer and put result from CTX |
| in first 32 bytes following RESBUF. |
| |
| IMPORTANT: On some systems it is required that RESBUF is correctly |
| aligned for a 32 bits value. */ |
| extern void *__sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf) |
| __THROW; |
| |
| #endif /* sha256.h */ |