1 /* Declaration of functions and data types used for SHA512 sum computing 2 library functions. 3 Copyright (C) 2007-2022 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 <https://www.gnu.org/licenses/>. */ 19 20 #ifndef _SHA512_H 21 #define _SHA512_H 1 22 23 #include <limits.h> 24 #include <stdint.h> 25 #include <stdio.h> 26 #include <endian.h> 27 #include <bits/wordsize.h> 28 29 30 /* Structure to save state of computation between the single steps. */ 31 struct sha512_ctx 32 { 33 uint64_t H[8]; 34 35 union 36 { 37 #if defined __GNUC__ && __WORDSIZE == 64 38 # define USE_TOTAL128 39 unsigned int total128 __attribute__ ((__mode__ (TI))); 40 #endif 41 #define TOTAL128_low (1 - (BYTE_ORDER == LITTLE_ENDIAN)) 42 #define TOTAL128_high (BYTE_ORDER == LITTLE_ENDIAN) 43 uint64_t total[2]; 44 }; 45 uint64_t buflen; 46 union 47 { 48 char buffer[256]; 49 uint64_t buffer64[32]; 50 }; 51 }; 52 53 /* Initialize structure containing state of computation. 54 (FIPS 180-2: 5.3.3) */ 55 extern void __sha512_init_ctx (struct sha512_ctx *ctx) __THROW; 56 57 /* Starting with the result of former calls of this function (or the 58 initialization function update the context for the next LEN bytes 59 starting at BUFFER. 60 It is NOT required that LEN is a multiple of 128. */ 61 extern void __sha512_process_bytes (const void *buffer, size_t len, 62 struct sha512_ctx *ctx) __THROW; 63 64 /* Process the remaining bytes in the buffer and put result from CTX 65 in first 64 bytes following RESBUF. 66 67 IMPORTANT: On some systems it is required that RESBUF is correctly 68 aligned for a 64 bits value. */ 69 extern void *__sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf) 70 __THROW; 71 72 #endif /* sha512.h */ 73