[337] | 1 | /* pwdbased.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2017 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL.
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| 6 | *
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| 7 | * wolfSSL is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * wolfSSL is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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| 20 | */
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| 21 |
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| 22 |
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| 23 | #ifdef HAVE_CONFIG_H
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| 24 | #include <config.h>
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| 25 | #endif
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| 26 |
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| 27 | #include <wolfssl/wolfcrypt/settings.h>
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| 28 |
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| 29 | #ifndef NO_PWDBASED
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| 30 |
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| 31 | #include <wolfssl/wolfcrypt/pwdbased.h>
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| 32 | #include <wolfssl/wolfcrypt/hmac.h>
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[372] | 33 | #include <wolfssl/wolfcrypt/hash.h>
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[337] | 34 | #include <wolfssl/wolfcrypt/integer.h>
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| 35 | #include <wolfssl/wolfcrypt/error-crypt.h>
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| 36 |
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| 37 | #ifdef NO_INLINE
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| 38 | #include <wolfssl/wolfcrypt/misc.h>
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| 39 | #else
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| 40 | #define WOLFSSL_MISC_INCLUDED
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| 41 | #include <wolfcrypt/src/misc.c>
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| 42 | #endif
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| 43 |
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| 44 |
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[372] | 45 | /* PKCS#5 v1.5 with non standard extension to optionally derive the extra data (IV) */
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| 46 | int wc_PBKDF1_ex(byte* key, int keyLen, byte* iv, int ivLen,
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| 47 | const byte* passwd, int passwdLen, const byte* salt, int saltLen,
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| 48 | int iterations, int hashType, void* heap)
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[337] | 49 | {
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[372] | 50 | int err;
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| 51 | int keyLeft, ivLeft, i;
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| 52 | int digestLeft, store;
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| 53 | int keyOutput = 0;
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| 54 | int diestLen;
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| 55 | byte digest[WC_MAX_DIGEST_SIZE];
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| 56 | #ifdef WOLFSSL_SMALL_STACK
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| 57 | wc_HashAlg* hash = NULL;
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| 58 | #else
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| 59 | wc_HashAlg hash[1];
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[337] | 60 | #endif
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[372] | 61 | enum wc_HashType hashT;
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[337] | 62 |
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[372] | 63 | (void)heap;
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| 64 |
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| 65 | if (key == NULL || keyLen < 0 || passwdLen < 0 || saltLen < 0 || ivLen < 0){
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[337] | 66 | return BAD_FUNC_ARG;
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[372] | 67 | }
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[337] | 68 |
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[372] | 69 | if (iterations <= 0)
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| 70 | iterations = 1;
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[337] | 71 |
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[372] | 72 | hashT = wc_HashTypeConvert(hashType);
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| 73 | err = wc_HashGetDigestSize(hashT);
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| 74 | if (err < 0)
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| 75 | return err;
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| 76 | diestLen = err;
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[337] | 77 |
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[372] | 78 | /* initialize hash */
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| 79 | #ifdef WOLFSSL_SMALL_STACK
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| 80 | hash = (wc_HashAlg*)XMALLOC(sizeof(wc_HashAlg), heap,
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| 81 | DYNAMIC_TYPE_HASHCTX);
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| 82 | if (hash == NULL)
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| 83 | return MEMORY_E;
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| 84 | #endif
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[337] | 85 |
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[372] | 86 | err = wc_HashInit(hash, hashT);
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| 87 | if (err != 0) {
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| 88 | #ifdef WOLFSSL_SMALL_STACK
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| 89 | XFREE(hash, heap, DYNAMIC_TYPE_HASHCTX);
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| 90 | #endif
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| 91 | return err;
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[337] | 92 | }
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[372] | 93 |
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| 94 | keyLeft = keyLen;
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| 95 | ivLeft = ivLen;
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| 96 | while (keyOutput < (keyLen + ivLen)) {
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| 97 | digestLeft = diestLen;
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| 98 | /* D_(i - 1) */
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| 99 | if (keyOutput) { /* first time D_0 is empty */
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| 100 | err = wc_HashUpdate(hash, hashT, digest, diestLen);
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| 101 | if (err != 0) break;
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[337] | 102 | }
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[372] | 103 |
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| 104 | /* data */
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| 105 | err = wc_HashUpdate(hash, hashT, passwd, passwdLen);
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| 106 | if (err != 0) break;
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| 107 |
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| 108 | /* salt */
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| 109 | if (salt) {
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| 110 | err = wc_HashUpdate(hash, hashT, salt, saltLen);
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| 111 | if (err != 0) break;
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[337] | 112 | }
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| 113 |
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[372] | 114 | err = wc_HashFinal(hash, hashT, digest);
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| 115 | if (err != 0) break;
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| 116 |
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| 117 | /* count */
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[337] | 118 | for (i = 1; i < iterations; i++) {
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[372] | 119 | err = wc_HashUpdate(hash, hashT, digest, diestLen);
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| 120 | if (err != 0) break;
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| 121 |
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| 122 | err = wc_HashFinal(hash, hashT, digest);
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| 123 | if (err != 0) break;
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[337] | 124 | }
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[372] | 125 |
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| 126 | if (keyLeft) {
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| 127 | store = min(keyLeft, diestLen);
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| 128 | XMEMCPY(&key[keyLen - keyLeft], digest, store);
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| 129 |
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| 130 | keyOutput += store;
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| 131 | keyLeft -= store;
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| 132 | digestLeft -= store;
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[337] | 133 | }
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[372] | 134 |
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| 135 | if (ivLeft && digestLeft) {
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| 136 | store = min(ivLeft, digestLeft);
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| 137 | if (iv != NULL)
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| 138 | XMEMCPY(&iv[ivLen - ivLeft],
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| 139 | &digest[diestLen - digestLeft], store);
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| 140 | keyOutput += store;
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| 141 | ivLeft -= store;
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[337] | 142 | }
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| 143 | }
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| 144 |
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[372] | 145 | wc_HashFree(hash, hashT);
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[337] | 146 |
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[372] | 147 | #ifdef WOLFSSL_SMALL_STACK
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| 148 | XFREE(hash, heap, DYNAMIC_TYPE_HASHCTX);
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| 149 | #endif
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[337] | 150 |
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[372] | 151 | if (err != 0)
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| 152 | return err;
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[337] | 153 |
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[372] | 154 | if (keyOutput != (keyLen + ivLen))
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| 155 | return BUFFER_E;
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| 156 |
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| 157 | return err;
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[337] | 158 | }
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| 159 |
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[372] | 160 | /* PKCS#5 v1.5 */
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| 161 | int wc_PBKDF1(byte* output, const byte* passwd, int pLen, const byte* salt,
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| 162 | int sLen, int iterations, int kLen, int hashType)
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| 163 | {
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| 164 | return wc_PBKDF1_ex(output, kLen, NULL, 0,
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| 165 | passwd, pLen, salt, sLen, iterations, hashType, NULL);
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[337] | 166 | }
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| 167 |
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| 168 |
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| 169 | int wc_PBKDF2(byte* output, const byte* passwd, int pLen, const byte* salt,
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| 170 | int sLen, int iterations, int kLen, int hashType)
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| 171 | {
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| 172 | word32 i = 1;
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| 173 | int hLen;
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| 174 | int j, ret;
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| 175 | #ifdef WOLFSSL_SMALL_STACK
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| 176 | byte* buffer;
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[372] | 177 | Hmac* hmac;
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[337] | 178 | #else
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[372] | 179 | byte buffer[WC_MAX_DIGEST_SIZE];
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| 180 | Hmac hmac[1];
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[337] | 181 | #endif
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[372] | 182 | enum wc_HashType hashT;
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[337] | 183 |
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[372] | 184 | if (output == NULL || pLen < 0 || sLen < 0 || kLen < 0) {
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| 185 | return BAD_FUNC_ARG;
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| 186 | }
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| 187 |
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| 188 | if (iterations <= 0)
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| 189 | iterations = 1;
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| 190 |
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| 191 | hashT = wc_HashTypeConvert(hashType);
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| 192 | hLen = wc_HashGetDigestSize(hashT);
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[337] | 193 | if (hLen < 0)
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| 194 | return BAD_FUNC_ARG;
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| 195 |
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| 196 | #ifdef WOLFSSL_SMALL_STACK
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[372] | 197 | buffer = (byte*)XMALLOC(WC_MAX_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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[337] | 198 | if (buffer == NULL)
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| 199 | return MEMORY_E;
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[372] | 200 | hmac = (Hmac*)XMALLOC(sizeof(Hmac), NULL, DYNAMIC_TYPE_HMAC);
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| 201 | if (buffer == NULL)
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| 202 | return MEMORY_E;
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[337] | 203 | #endif
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| 204 |
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[372] | 205 | ret = wc_HmacInit(hmac, NULL, INVALID_DEVID);
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[337] | 206 | if (ret == 0) {
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[372] | 207 | /* use int hashType here, since HMAC FIPS uses the old unique value */
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| 208 | ret = wc_HmacSetKey(hmac, hashType, passwd, pLen);
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[337] | 209 |
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| 210 | while (ret == 0 && kLen) {
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| 211 | int currentLen;
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| 212 |
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[372] | 213 | ret = wc_HmacUpdate(hmac, salt, sLen);
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[337] | 214 | if (ret != 0)
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| 215 | break;
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| 216 |
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| 217 | /* encode i */
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| 218 | for (j = 0; j < 4; j++) {
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| 219 | byte b = (byte)(i >> ((3-j) * 8));
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| 220 |
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[372] | 221 | ret = wc_HmacUpdate(hmac, &b, 1);
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[337] | 222 | if (ret != 0)
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| 223 | break;
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| 224 | }
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| 225 |
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| 226 | /* check ret from inside for loop */
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| 227 | if (ret != 0)
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| 228 | break;
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| 229 |
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[372] | 230 | ret = wc_HmacFinal(hmac, buffer);
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[337] | 231 | if (ret != 0)
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| 232 | break;
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| 233 |
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| 234 | currentLen = min(kLen, hLen);
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| 235 | XMEMCPY(output, buffer, currentLen);
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| 236 |
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| 237 | for (j = 1; j < iterations; j++) {
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[372] | 238 | ret = wc_HmacUpdate(hmac, buffer, hLen);
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[337] | 239 | if (ret != 0)
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| 240 | break;
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[372] | 241 | ret = wc_HmacFinal(hmac, buffer);
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[337] | 242 | if (ret != 0)
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| 243 | break;
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| 244 | xorbuf(output, buffer, currentLen);
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| 245 | }
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| 246 |
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| 247 | /* check ret from inside for loop */
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| 248 | if (ret != 0)
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| 249 | break;
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| 250 |
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| 251 | output += currentLen;
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| 252 | kLen -= currentLen;
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| 253 | i++;
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| 254 | }
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[372] | 255 | wc_HmacFree(hmac);
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[337] | 256 | }
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| 257 |
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| 258 | #ifdef WOLFSSL_SMALL_STACK
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| 259 | XFREE(buffer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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[372] | 260 | XFREE(hmac, NULL, DYNAMIC_TYPE_HMAC);
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[337] | 261 | #endif
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| 262 |
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| 263 | return ret;
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| 264 | }
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| 265 |
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| 266 | /* helper for PKCS12_PBKDF(), does hash operation */
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[372] | 267 | static int DoPKCS12Hash(int hashType, byte* buffer, word32 totalLen,
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[337] | 268 | byte* Ai, word32 u, int iterations)
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| 269 | {
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| 270 | int i;
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| 271 | int ret = 0;
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[372] | 272 | #ifdef WOLFSSL_SMALL_STACK
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| 273 | wc_HashAlg* hash = NULL;
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| 274 | #else
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| 275 | wc_HashAlg hash[1];
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| 276 | #endif
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| 277 | enum wc_HashType hashT;
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[337] | 278 |
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[372] | 279 | if (buffer == NULL || Ai == NULL) {
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[337] | 280 | return BAD_FUNC_ARG;
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| 281 | }
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| 282 |
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[372] | 283 | hashT = wc_HashTypeConvert(hashType);
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[337] | 284 |
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[372] | 285 | /* initialize hash */
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| 286 | #ifdef WOLFSSL_SMALL_STACK
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| 287 | hash = (wc_HashAlg*)XMALLOC(sizeof(wc_HashAlg), NULL,
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| 288 | DYNAMIC_TYPE_HASHCTX);
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| 289 | if (hash == NULL)
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| 290 | return MEMORY_E;
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| 291 | #endif
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| 292 |
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| 293 | ret = wc_HashInit(hash, hashT);
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[337] | 294 | if (ret != 0) {
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[372] | 295 | #ifdef WOLFSSL_SMALL_STACK
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| 296 | XFREE(hash, NULL, DYNAMIC_TYPE_HASHCTX);
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| 297 | #endif
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| 298 | return ret;
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[337] | 299 | }
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| 300 |
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[372] | 301 | ret = wc_HashUpdate(hash, hashT, buffer, totalLen);
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[337] | 302 |
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[372] | 303 | if (ret == 0)
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| 304 | ret = wc_HashFinal(hash, hashT, Ai);
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[337] | 305 |
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| 306 | for (i = 1; i < iterations; i++) {
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[372] | 307 | if (ret == 0)
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| 308 | ret = wc_HashUpdate(hash, hashT, Ai, u);
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| 309 | if (ret == 0)
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| 310 | ret = wc_HashFinal(hash, hashT, Ai);
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[337] | 311 | }
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| 312 |
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[372] | 313 | wc_HashFree(hash, hashT);
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[337] | 314 |
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[372] | 315 | #ifdef WOLFSSL_SMALL_STACK
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| 316 | XFREE(hash, NULL, DYNAMIC_TYPE_HASHCTX);
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| 317 | #endif
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[337] | 318 |
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| 319 | return ret;
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| 320 | }
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| 321 |
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| 322 |
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[372] | 323 | int wc_PKCS12_PBKDF(byte* output, const byte* passwd, int passLen,
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| 324 | const byte* salt, int saltLen, int iterations, int kLen, int hashType,
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| 325 | int id)
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[337] | 326 | {
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| 327 | return wc_PKCS12_PBKDF_ex(output, passwd, passLen, salt, saltLen,
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| 328 | iterations, kLen, hashType, id, NULL);
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| 329 | }
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| 330 |
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| 331 |
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| 332 | /* extended API that allows a heap hint to be used */
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| 333 | int wc_PKCS12_PBKDF_ex(byte* output, const byte* passwd, int passLen,
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| 334 | const byte* salt, int saltLen, int iterations, int kLen,
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| 335 | int hashType, int id, void* heap)
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| 336 | {
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| 337 | /* all in bytes instead of bits */
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| 338 | word32 u, v, dLen, pLen, iLen, sLen, totalLen;
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| 339 | int dynamic = 0;
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| 340 | int ret = 0;
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| 341 | int i;
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| 342 | byte *D, *S, *P, *I;
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| 343 | #ifdef WOLFSSL_SMALL_STACK
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| 344 | byte staticBuffer[1]; /* force dynamic usage */
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| 345 | #else
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| 346 | byte staticBuffer[1024];
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| 347 | #endif
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| 348 | byte* buffer = staticBuffer;
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| 349 |
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| 350 | #ifdef WOLFSSL_SMALL_STACK
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| 351 | byte* Ai;
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| 352 | byte* B;
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| 353 | #else
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[372] | 354 | byte Ai[WC_MAX_DIGEST_SIZE];
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| 355 | byte B[WC_MAX_BLOCK_SIZE];
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[337] | 356 | #endif
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[372] | 357 | enum wc_HashType hashT;
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[337] | 358 |
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[372] | 359 | (void)heap;
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| 360 |
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| 361 | if (output == NULL || passLen < 0 || saltLen < 0 || kLen < 0) {
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| 362 | return BAD_FUNC_ARG;
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| 363 | }
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| 364 |
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| 365 | if (iterations <= 0)
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[337] | 366 | iterations = 1;
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| 367 |
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[372] | 368 | hashT = wc_HashTypeConvert(hashType);
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| 369 | ret = wc_HashGetDigestSize(hashT);
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[337] | 370 | if (ret < 0)
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[372] | 371 | return ret;
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| 372 | u = ret;
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[337] | 373 |
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[372] | 374 | ret = wc_HashGetBlockSize(hashT);
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| 375 | if (ret < 0)
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| 376 | return ret;
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| 377 | v = ret;
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| 378 |
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[337] | 379 | #ifdef WOLFSSL_SMALL_STACK
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[372] | 380 | Ai = (byte*)XMALLOC(WC_MAX_DIGEST_SIZE, heap, DYNAMIC_TYPE_TMP_BUFFER);
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[337] | 381 | if (Ai == NULL)
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| 382 | return MEMORY_E;
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| 383 |
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[372] | 384 | B = (byte*)XMALLOC(WC_MAX_BLOCK_SIZE, heap, DYNAMIC_TYPE_TMP_BUFFER);
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[337] | 385 | if (B == NULL) {
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[372] | 386 | XFREE(Ai, heap, DYNAMIC_TYPE_TMP_BUFFER);
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[337] | 387 | return MEMORY_E;
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| 388 | }
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| 389 | #endif
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| 390 |
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[372] | 391 | XMEMSET(Ai, 0, WC_MAX_DIGEST_SIZE);
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| 392 | XMEMSET(B, 0, WC_MAX_BLOCK_SIZE);
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[337] | 393 |
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| 394 | dLen = v;
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| 395 | sLen = v * ((saltLen + v - 1) / v);
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| 396 | if (passLen)
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| 397 | pLen = v * ((passLen + v - 1) / v);
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| 398 | else
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| 399 | pLen = 0;
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| 400 | iLen = sLen + pLen;
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| 401 |
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| 402 | totalLen = dLen + sLen + pLen;
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| 403 |
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| 404 | if (totalLen > sizeof(staticBuffer)) {
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| 405 | buffer = (byte*)XMALLOC(totalLen, heap, DYNAMIC_TYPE_KEY);
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| 406 | if (buffer == NULL) {
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| 407 | #ifdef WOLFSSL_SMALL_STACK
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[372] | 408 | XFREE(Ai, heap, DYNAMIC_TYPE_TMP_BUFFER);
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| 409 | XFREE(B, heap, DYNAMIC_TYPE_TMP_BUFFER);
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[337] | 410 | #endif
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| 411 | return MEMORY_E;
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| 412 | }
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| 413 | dynamic = 1;
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| 414 | }
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| 415 |
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| 416 | D = buffer;
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| 417 | S = D + dLen;
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| 418 | P = S + sLen;
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| 419 | I = S;
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| 420 |
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| 421 | XMEMSET(D, id, dLen);
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| 422 |
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| 423 | for (i = 0; i < (int)sLen; i++)
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| 424 | S[i] = salt[i % saltLen];
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| 425 | for (i = 0; i < (int)pLen; i++)
|
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| 426 | P[i] = passwd[i % passLen];
|
---|
| 427 |
|
---|
| 428 | while (kLen > 0) {
|
---|
| 429 | word32 currentLen;
|
---|
| 430 | mp_int B1;
|
---|
| 431 |
|
---|
| 432 | ret = DoPKCS12Hash(hashType, buffer, totalLen, Ai, u, iterations);
|
---|
| 433 | if (ret < 0)
|
---|
| 434 | break;
|
---|
| 435 |
|
---|
| 436 | for (i = 0; i < (int)v; i++)
|
---|
| 437 | B[i] = Ai[i % u];
|
---|
| 438 |
|
---|
| 439 | if (mp_init(&B1) != MP_OKAY)
|
---|
| 440 | ret = MP_INIT_E;
|
---|
| 441 | else if (mp_read_unsigned_bin(&B1, B, v) != MP_OKAY)
|
---|
| 442 | ret = MP_READ_E;
|
---|
| 443 | else if (mp_add_d(&B1, (mp_digit)1, &B1) != MP_OKAY)
|
---|
| 444 | ret = MP_ADD_E;
|
---|
| 445 |
|
---|
| 446 | if (ret != 0) {
|
---|
| 447 | mp_clear(&B1);
|
---|
| 448 | break;
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | for (i = 0; i < (int)iLen; i += v) {
|
---|
| 452 | int outSz;
|
---|
| 453 | mp_int i1;
|
---|
| 454 | mp_int res;
|
---|
| 455 |
|
---|
| 456 | if (mp_init_multi(&i1, &res, NULL, NULL, NULL, NULL) != MP_OKAY) {
|
---|
| 457 | ret = MP_INIT_E;
|
---|
| 458 | break;
|
---|
| 459 | }
|
---|
| 460 | if (mp_read_unsigned_bin(&i1, I + i, v) != MP_OKAY)
|
---|
| 461 | ret = MP_READ_E;
|
---|
| 462 | else if (mp_add(&i1, &B1, &res) != MP_OKAY)
|
---|
| 463 | ret = MP_ADD_E;
|
---|
| 464 | else if ( (outSz = mp_unsigned_bin_size(&res)) < 0)
|
---|
| 465 | ret = MP_TO_E;
|
---|
| 466 | else {
|
---|
| 467 | if (outSz > (int)v) {
|
---|
| 468 | /* take off MSB */
|
---|
| 469 | byte tmp[129];
|
---|
| 470 | ret = mp_to_unsigned_bin(&res, tmp);
|
---|
| 471 | XMEMCPY(I + i, tmp + 1, v);
|
---|
| 472 | }
|
---|
| 473 | else if (outSz < (int)v) {
|
---|
| 474 | XMEMSET(I + i, 0, v - outSz);
|
---|
| 475 | ret = mp_to_unsigned_bin(&res, I + i + v - outSz);
|
---|
| 476 | }
|
---|
| 477 | else
|
---|
| 478 | ret = mp_to_unsigned_bin(&res, I + i);
|
---|
| 479 | }
|
---|
| 480 |
|
---|
| 481 | mp_clear(&i1);
|
---|
| 482 | mp_clear(&res);
|
---|
| 483 | if (ret < 0) break;
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | currentLen = min(kLen, (int)u);
|
---|
| 487 | XMEMCPY(output, Ai, currentLen);
|
---|
| 488 | output += currentLen;
|
---|
| 489 | kLen -= currentLen;
|
---|
| 490 | mp_clear(&B1);
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | if (dynamic) XFREE(buffer, heap, DYNAMIC_TYPE_KEY);
|
---|
| 494 |
|
---|
| 495 | #ifdef WOLFSSL_SMALL_STACK
|
---|
[372] | 496 | XFREE(Ai, heap, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 497 | XFREE(B, heap, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
[337] | 498 | #endif
|
---|
| 499 |
|
---|
| 500 | return ret;
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | #ifdef HAVE_SCRYPT
|
---|
| 504 | /* Rotate the 32-bit value a by b bits to the left.
|
---|
| 505 | *
|
---|
| 506 | * a 32-bit value.
|
---|
| 507 | * b Number of bits to rotate.
|
---|
| 508 | * returns rotated value.
|
---|
| 509 | */
|
---|
| 510 | #define R(a, b) rotlFixed(a, b)
|
---|
| 511 |
|
---|
| 512 | /* One round of Salsa20/8.
|
---|
| 513 | * Code taken from RFC 7914: scrypt PBKDF.
|
---|
| 514 | *
|
---|
| 515 | * out Output buffer.
|
---|
| 516 | * in Input data to hash.
|
---|
| 517 | */
|
---|
| 518 | static void scryptSalsa(word32* out, word32* in)
|
---|
| 519 | {
|
---|
| 520 | int i;
|
---|
| 521 | word32 x[16];
|
---|
| 522 |
|
---|
| 523 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
| 524 | for (i = 0; i < 16; ++i)
|
---|
| 525 | x[i] = in[i];
|
---|
| 526 | #else
|
---|
| 527 | for (i = 0; i < 16; i++)
|
---|
| 528 | x[i] = ByteReverseWord32(in[i]);
|
---|
| 529 | #endif
|
---|
| 530 | for (i = 8; i > 0; i -= 2) {
|
---|
| 531 | x[ 4] ^= R(x[ 0] + x[12], 7); x[ 8] ^= R(x[ 4] + x[ 0], 9);
|
---|
| 532 | x[12] ^= R(x[ 8] + x[ 4], 13); x[ 0] ^= R(x[12] + x[ 8], 18);
|
---|
| 533 | x[ 9] ^= R(x[ 5] + x[ 1], 7); x[13] ^= R(x[ 9] + x[ 5], 9);
|
---|
| 534 | x[ 1] ^= R(x[13] + x[ 9], 13); x[ 5] ^= R(x[ 1] + x[13], 18);
|
---|
| 535 | x[14] ^= R(x[10] + x[ 6], 7); x[ 2] ^= R(x[14] + x[10], 9);
|
---|
| 536 | x[ 6] ^= R(x[ 2] + x[14], 13); x[10] ^= R(x[ 6] + x[ 2], 18);
|
---|
| 537 | x[ 3] ^= R(x[15] + x[11], 7); x[ 7] ^= R(x[ 3] + x[15], 9);
|
---|
| 538 | x[11] ^= R(x[ 7] + x[ 3], 13); x[15] ^= R(x[11] + x[ 7], 18);
|
---|
| 539 | x[ 1] ^= R(x[ 0] + x[ 3], 7); x[ 2] ^= R(x[ 1] + x[ 0], 9);
|
---|
| 540 | x[ 3] ^= R(x[ 2] + x[ 1], 13); x[ 0] ^= R(x[ 3] + x[ 2], 18);
|
---|
| 541 | x[ 6] ^= R(x[ 5] + x[ 4], 7); x[ 7] ^= R(x[ 6] + x[ 5], 9);
|
---|
| 542 | x[ 4] ^= R(x[ 7] + x[ 6], 13); x[ 5] ^= R(x[ 4] + x[ 7], 18);
|
---|
| 543 | x[11] ^= R(x[10] + x[ 9], 7); x[ 8] ^= R(x[11] + x[10], 9);
|
---|
| 544 | x[ 9] ^= R(x[ 8] + x[11], 13); x[10] ^= R(x[ 9] + x[ 8], 18);
|
---|
| 545 | x[12] ^= R(x[15] + x[14], 7); x[13] ^= R(x[12] + x[15], 9);
|
---|
| 546 | x[14] ^= R(x[13] + x[12], 13); x[15] ^= R(x[14] + x[13], 18);
|
---|
| 547 | }
|
---|
| 548 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
| 549 | for (i = 0; i < 16; ++i)
|
---|
| 550 | out[i] = in[i] + x[i];
|
---|
| 551 | #else
|
---|
| 552 | for (i = 0; i < 16; i++)
|
---|
| 553 | out[i] = ByteReverseWord32(ByteReverseWord32(in[i]) + x[i]);
|
---|
| 554 | #endif
|
---|
| 555 | }
|
---|
| 556 |
|
---|
| 557 | /* Mix a block using Salsa20/8.
|
---|
| 558 | * Based on RFC 7914: scrypt PBKDF.
|
---|
| 559 | *
|
---|
| 560 | * b Blocks to mix.
|
---|
| 561 | * y Temporary storage.
|
---|
| 562 | * r Size of the block.
|
---|
| 563 | */
|
---|
| 564 | static void scryptBlockMix(byte* b, byte* y, int r)
|
---|
| 565 | {
|
---|
| 566 | byte x[64];
|
---|
| 567 | #ifdef WORD64_AVAILABLE
|
---|
| 568 | word64* b64 = (word64*)b;
|
---|
| 569 | word64* y64 = (word64*)y;
|
---|
| 570 | word64* x64 = (word64*)x;
|
---|
| 571 | #else
|
---|
| 572 | word32* b32 = (word32*)b;
|
---|
| 573 | word32* y32 = (word32*)y;
|
---|
| 574 | word32* x32 = (word32*)x;
|
---|
| 575 | #endif
|
---|
| 576 | int i;
|
---|
| 577 | int j;
|
---|
| 578 |
|
---|
| 579 | /* Step 1. */
|
---|
| 580 | XMEMCPY(x, b + (2 * r - 1) * 64, sizeof(x));
|
---|
| 581 | /* Step 2. */
|
---|
| 582 | for (i = 0; i < 2 * r; i++)
|
---|
| 583 | {
|
---|
| 584 | #ifdef WORD64_AVAILABLE
|
---|
| 585 | for (j = 0; j < 8; j++)
|
---|
| 586 | x64[j] ^= b64[i * 8 + j];
|
---|
| 587 | #else
|
---|
| 588 | for (j = 0; j < 16; j++)
|
---|
| 589 | x32[j] ^= b32[i * 16 + j];
|
---|
| 590 | #endif
|
---|
| 591 | scryptSalsa((word32*)x, (word32*)x);
|
---|
| 592 | XMEMCPY(y + i * 64, x, sizeof(x));
|
---|
| 593 | }
|
---|
| 594 | /* Step 3. */
|
---|
| 595 | for (i = 0; i < r; i++) {
|
---|
| 596 | #ifdef WORD64_AVAILABLE
|
---|
| 597 | for (j = 0; j < 8; j++) {
|
---|
| 598 | b64[i * 8 + j] = y64[2 * i * 8 + j];
|
---|
| 599 | b64[(r + i) * 8 + j] = y64[(2 * i + 1) * 8 + j];
|
---|
| 600 | }
|
---|
| 601 | #else
|
---|
| 602 | for (j = 0; j < 16; j++) {
|
---|
| 603 | b32[i * 16 + j] = y32[2 * i * 16 + j];
|
---|
| 604 | b32[(r + i) * 16 + j] = y32[(2 * i + 1) * 16 + j];
|
---|
| 605 | }
|
---|
| 606 | #endif
|
---|
| 607 | }
|
---|
| 608 | }
|
---|
| 609 |
|
---|
| 610 | /* Random oracles mix.
|
---|
| 611 | * Based on RFC 7914: scrypt PBKDF.
|
---|
| 612 | *
|
---|
| 613 | * x Data to mix.
|
---|
| 614 | * v Temporary buffer.
|
---|
| 615 | * y Temporary buffer for the block mix.
|
---|
| 616 | * r Block size parameter.
|
---|
| 617 | * n CPU/Memory cost parameter.
|
---|
| 618 | */
|
---|
| 619 | static void scryptROMix(byte* x, byte* v, byte* y, int r, word32 n)
|
---|
| 620 | {
|
---|
| 621 | word32 i;
|
---|
| 622 | word32 j;
|
---|
| 623 | word32 k;
|
---|
| 624 | word32 bSz = 128 * r;
|
---|
| 625 | #ifdef WORD64_AVAILABLE
|
---|
| 626 | word64* x64 = (word64*)x;
|
---|
| 627 | word64* v64 = (word64*)v;
|
---|
| 628 | #else
|
---|
| 629 | word32* x32 = (word32*)x;
|
---|
| 630 | word32* v32 = (word32*)v;
|
---|
| 631 | #endif
|
---|
| 632 |
|
---|
| 633 | /* Step 1. X = B (B not needed therefore not implemented) */
|
---|
| 634 | /* Step 2. */
|
---|
| 635 | for (i = 0; i < n; i++)
|
---|
| 636 | {
|
---|
| 637 | XMEMCPY(v + i * bSz, x, bSz);
|
---|
| 638 | scryptBlockMix(x, y, r);
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | /* Step 3. */
|
---|
| 642 | for (i = 0; i < n; i++)
|
---|
| 643 | {
|
---|
| 644 | #ifdef LITTLE_ENDIAN_ORDER
|
---|
| 645 | #ifdef WORD64_AVAILABLE
|
---|
| 646 | j = *(word64*)(x + (2*r - 1) * 64) & (n-1);
|
---|
| 647 | #else
|
---|
| 648 | j = *(word32*)(x + (2*r - 1) * 64) & (n-1);
|
---|
| 649 | #endif
|
---|
| 650 | #else
|
---|
| 651 | byte* t = x + (2*r - 1) * 64;
|
---|
[372] | 652 | j = (t[0] | (t[1] << 8) | (t[2] << 16) | ((word32)t[3] << 24)) & (n-1);
|
---|
[337] | 653 | #endif
|
---|
| 654 | #ifdef WORD64_AVAILABLE
|
---|
| 655 | for (k = 0; k < bSz / 8; k++)
|
---|
| 656 | x64[k] ^= v64[j * bSz / 8 + k];
|
---|
| 657 | #else
|
---|
| 658 | for (k = 0; k < bSz / 4; k++)
|
---|
| 659 | x32[k] ^= v32[j * bSz / 4 + k];
|
---|
| 660 | #endif
|
---|
| 661 | scryptBlockMix(x, y, r);
|
---|
| 662 | }
|
---|
| 663 | /* Step 4. B' = X (B = X = B' so not needed, therefore not implemented) */
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 | /* Generates an key derived from a password and salt using a memory hard
|
---|
| 667 | * algorithm.
|
---|
| 668 | * Implements RFC 7914: scrypt PBKDF.
|
---|
| 669 | *
|
---|
| 670 | * output The derived key.
|
---|
| 671 | * passwd The password to derive key from.
|
---|
| 672 | * passLen The length of the password.
|
---|
| 673 | * salt The key specific data.
|
---|
| 674 | * saltLen The length of the salt data.
|
---|
| 675 | * cost The CPU/memory cost parameter. Range: 1..(128*r/8-1)
|
---|
| 676 | * (Iterations = 2^cost)
|
---|
| 677 | * blockSize The number of 128 byte octets in a working block.
|
---|
| 678 | * parallel The number of parallel mix operations to perform.
|
---|
| 679 | * (Note: this implementation does not use threads.)
|
---|
| 680 | * dkLen The length of the derived key in bytes.
|
---|
| 681 | * returns BAD_FUNC_ARG when: parallel not 1, blockSize is too large for cost.
|
---|
| 682 | */
|
---|
| 683 | int wc_scrypt(byte* output, const byte* passwd, int passLen,
|
---|
| 684 | const byte* salt, int saltLen, int cost, int blockSize,
|
---|
| 685 | int parallel, int dkLen)
|
---|
| 686 | {
|
---|
| 687 | int ret = 0;
|
---|
| 688 | int i;
|
---|
| 689 | byte* v = NULL;
|
---|
| 690 | byte* y = NULL;
|
---|
| 691 | byte* blocks = NULL;
|
---|
| 692 | word32 blocksSz;
|
---|
| 693 | word32 bSz;
|
---|
| 694 |
|
---|
| 695 | if (blockSize > 8)
|
---|
| 696 | return BAD_FUNC_ARG;
|
---|
| 697 |
|
---|
| 698 | if (cost < 1 || cost >= 128 * blockSize / 8)
|
---|
| 699 | return BAD_FUNC_ARG;
|
---|
| 700 |
|
---|
| 701 | bSz = 128 * blockSize;
|
---|
| 702 | blocksSz = bSz * parallel;
|
---|
| 703 | blocks = (byte*)XMALLOC(blocksSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 704 | if (blocks == NULL)
|
---|
| 705 | goto end;
|
---|
| 706 | /* Temporary for scryptROMix. */
|
---|
| 707 | v = (byte*)XMALLOC((1 << cost) * bSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 708 | if (v == NULL)
|
---|
| 709 | goto end;
|
---|
| 710 | /* Temporary for scryptBlockMix. */
|
---|
| 711 | y = (byte*)XMALLOC(blockSize * 128, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 712 | if (y == NULL)
|
---|
| 713 | goto end;
|
---|
| 714 |
|
---|
| 715 | /* Step 1. */
|
---|
| 716 | ret = wc_PBKDF2(blocks, passwd, passLen, salt, saltLen, 1, blocksSz,
|
---|
| 717 | WC_SHA256);
|
---|
| 718 | if (ret != 0)
|
---|
| 719 | goto end;
|
---|
| 720 |
|
---|
| 721 | /* Step 2. */
|
---|
| 722 | for (i = 0; i < parallel; i++)
|
---|
| 723 | scryptROMix(blocks + i * bSz, v, y, blockSize, 1 << cost);
|
---|
| 724 |
|
---|
| 725 | /* Step 3. */
|
---|
| 726 | ret = wc_PBKDF2(output, passwd, passLen, blocks, blocksSz, 1, dkLen,
|
---|
| 727 | WC_SHA256);
|
---|
| 728 | end:
|
---|
| 729 | if (blocks != NULL)
|
---|
| 730 | XFREE(blocks, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 731 | if (v != NULL)
|
---|
| 732 | XFREE(v, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 733 | if (y != NULL)
|
---|
| 734 | XFREE(y, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 735 |
|
---|
| 736 | return ret;
|
---|
| 737 | }
|
---|
| 738 | #endif
|
---|
| 739 |
|
---|
[372] | 740 | #undef WC_MAX_DIGEST_SIZE
|
---|
[337] | 741 |
|
---|
| 742 | #endif /* NO_PWDBASED */
|
---|
| 743 |
|
---|