include/nettle/sm3.h

0001 /* sm3.h
0002
0003    The SM3 hash function.
0004
0005    Copyright (C) 2017 Jia Zhang
0006    Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
0007
0008    This file is part of GNU Nettle.
0009
0010    GNU Nettle is free software: you can redistribute it and/or
0011    modify it under the terms of either:
0012
0013      * the GNU Lesser General Public License as published by the Free
0014        Software Foundation; either version 3 of the License, or (at your
0015        option) any later version.
0016
0017    or
0018
0019      * the GNU General Public License as published by the Free
0020        Software Foundation; either version 2 of the License, or (at your
0021        option) any later version.
0022
0023    or both in parallel, as here.
0024
0025    GNU Nettle is distributed in the hope that it will be useful,
0026    but WITHOUT ANY WARRANTY; without even the implied warranty of
0027    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0028    General Public License for more details.
0029
0030    You should have received copies of the GNU General Public License and
0031    the GNU Lesser General Public License along with this program.  If
0032    not, see http://www.gnu.org/licenses/.
0033 */
0034
0035 #ifndef NETTLE_SM3_H_INCLUDED
0036 #define NETTLE_SM3_H_INCLUDED
0037
0038 #include "nettle-types.h"
0039
0040 #ifdef __cplusplus
0041 extern "C" {
0042 #endif
0043
0044 /* Name mangling */
0045 #define sm3_init nettle_sm3_init
0046 #define sm3_update nettle_sm3_update
0047 #define sm3_digest nettle_sm3_digest
0048
0049 #define SM3_DIGEST_SIZE 32
0050 #define SM3_BLOCK_SIZE 64
0051
0052 /* Digest is kept internally as 8 32-bit words. */
0053 #define _SM3_DIGEST_LENGTH 8
0054
0055 struct sm3_ctx
0056 {
0057   uint32_t state[_SM3_DIGEST_LENGTH];
0058   uint64_t count;               /* Block count */
0059   unsigned index;               /* Into buffer */
0060   uint8_t block[SM3_BLOCK_SIZE]; /* Block buffer */
0061 };
0062
0063 void
0064 sm3_init(struct sm3_ctx *ctx);
0065
0066 void
0067 sm3_update(struct sm3_ctx *ctx,
0068        size_t length,
0069        const uint8_t *data);
0070
0071 void
0072 sm3_digest(struct sm3_ctx *ctx,
0073        size_t length,
0074        uint8_t *digest);
0075
0076 #ifdef __cplusplus
0077 }
0078 #endif
0079
0080 #endif /* NETTLE_SM3_H_INCLUDED */