100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/* blake2s-hash.c
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*
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* Copyright (C) 2006-2026 wolfSSL Inc.
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*
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/* Example of incremental BLAKE2s hashing with the wc_Blake2s API. */
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#include <stdio.h>
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#include <string.h>
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#include <wolfssl/options.h>
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#include <wolfssl/wolfcrypt/settings.h>
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#include <wolfssl/wolfcrypt/blake2.h>
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#ifdef HAVE_BLAKE2S
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#define DIGEST_SZ 32
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/* BLAKE2s-256("abc") from RFC 7693 Appendix B. */
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static const byte kat_abc[DIGEST_SZ] = {
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0x50, 0x8c, 0x5e, 0x8c, 0x32, 0x7c, 0x14, 0xe2,
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0xe1, 0xa7, 0x2b, 0xa3, 0x4e, 0xeb, 0x45, 0x2f,
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0x37, 0x45, 0x8b, 0x20, 0x9e, 0xd6, 0x3a, 0x29,
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0x4d, 0x99, 0x9b, 0x4c, 0x86, 0x67, 0x59, 0x82
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};
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static void print_hex(const char* label, const byte* data, word32 len)
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{
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word32 i;
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printf("%s: ", label);
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for (i = 0; i < len; i++)
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printf("%02x", data[i]);
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printf("\n");
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}
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int main(int argc, char* argv[])
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{
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int ret;
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Blake2s b2s;
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byte digest[DIGEST_SZ];
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const char* msg = (argc > 1) ? argv[1] : "abc";
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ret = wc_InitBlake2s(&b2s, DIGEST_SZ);
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if (ret != 0) {
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printf("wc_InitBlake2s failed %d\n", ret);
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return 1;
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}
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ret = wc_Blake2sUpdate(&b2s, (const byte*)msg, (word32)strlen(msg));
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if (ret != 0) {
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printf("wc_Blake2sUpdate failed %d\n", ret);
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return 1;
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}
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ret = wc_Blake2sFinal(&b2s, digest, DIGEST_SZ);
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if (ret != 0) {
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printf("wc_Blake2sFinal failed %d\n", ret);
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return 1;
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}
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print_hex("BLAKE2s-256", digest, DIGEST_SZ);
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if (argc <= 1) {
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if (memcmp(digest, kat_abc, DIGEST_SZ) != 0) {
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printf("Digest does not match RFC 7693 test vector!\n");
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return 1;
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}
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printf("Digest matches RFC 7693 test vector\n");
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}
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return 0;
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}
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#else
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int main(void)
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{
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printf("Please build wolfSSL with ./configure --enable-blake2s\n");
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return 0;
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}
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#endif /* HAVE_BLAKE2S */
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