90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* scrypt-kdf.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 scrypt (RFC 7914) memory-hard password-based key derivation,
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* run against the test vector from RFC 7914 Section 12. */
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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/pwdbased.h>
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#ifdef HAVE_SCRYPT
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/* RFC 7914 Section 12, vector 2: P="password", S="NaCl", N=1024, r=8, p=16,
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* dkLen=64. */
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static const byte expected_dk[64] = {
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0xfd, 0xba, 0xbe, 0x1c, 0x9d, 0x34, 0x72, 0x00,
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0x78, 0x56, 0xe7, 0x19, 0x0d, 0x01, 0xe9, 0xfe,
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0x7c, 0x6a, 0xd7, 0xcb, 0xc8, 0x23, 0x78, 0x30,
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0xe7, 0x73, 0x76, 0x63, 0x4b, 0x37, 0x31, 0x62,
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0x2e, 0xaf, 0x30, 0xd9, 0x2e, 0x22, 0xa3, 0x88,
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0x6f, 0xf1, 0x09, 0x27, 0x9d, 0x98, 0x30, 0xda,
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0xc7, 0x27, 0xaf, 0xb9, 0x4a, 0x83, 0xee, 0x6d,
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0x83, 0x60, 0xcb, 0xdf, 0xa2, 0xcc, 0x06, 0x40
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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(void)
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{
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int ret;
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byte dk[64];
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/* cost is log2(N): 10 -> N=1024. r (block size) scales memory use,
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* p (parallelization) scales CPU cost. */
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ret = wc_scrypt(dk, (const byte*)"password", 8, (const byte*)"NaCl", 4,
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10, 8, 16, (int)sizeof(dk));
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if (ret != 0) {
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printf("wc_scrypt failed %d\n", ret);
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return 1;
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}
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print_hex("key", dk, sizeof(dk));
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if (memcmp(dk, expected_dk, sizeof(dk)) != 0) {
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printf("Derived key does not match RFC 7914 test vector!\n");
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return 1;
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}
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printf("Derived key matches RFC 7914 test vector\n");
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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-scrypt\n");
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return 0;
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}
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#endif /* HAVE_SCRYPT */
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