1 /* $OpenBSD: p5_pbe.c,v 1.27 2024/03/28 00:44:26 tb Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 1999. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 63 #include <openssl/asn1t.h> 64 #include <openssl/err.h> 65 #include <openssl/x509.h> 66 67 #include "x509_local.h" 68 69 /* PKCS#5 password based encryption structure */ 70 71 static const ASN1_TEMPLATE PBEPARAM_seq_tt[] = { 72 { 73 .offset = offsetof(PBEPARAM, salt), 74 .field_name = "salt", 75 .item = &ASN1_OCTET_STRING_it, 76 }, 77 { 78 .offset = offsetof(PBEPARAM, iter), 79 .field_name = "iter", 80 .item = &ASN1_INTEGER_it, 81 }, 82 }; 83 84 const ASN1_ITEM PBEPARAM_it = { 85 .itype = ASN1_ITYPE_SEQUENCE, 86 .utype = V_ASN1_SEQUENCE, 87 .templates = PBEPARAM_seq_tt, 88 .tcount = sizeof(PBEPARAM_seq_tt) / sizeof(ASN1_TEMPLATE), 89 .size = sizeof(PBEPARAM), 90 .sname = "PBEPARAM", 91 }; 92 93 94 PBEPARAM * 95 d2i_PBEPARAM(PBEPARAM **a, const unsigned char **in, long len) 96 { 97 return (PBEPARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 98 &PBEPARAM_it); 99 } 100 101 int 102 i2d_PBEPARAM(PBEPARAM *a, unsigned char **out) 103 { 104 return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBEPARAM_it); 105 } 106 107 PBEPARAM * 108 PBEPARAM_new(void) 109 { 110 return (PBEPARAM *)ASN1_item_new(&PBEPARAM_it); 111 } 112 113 void 114 PBEPARAM_free(PBEPARAM *a) 115 { 116 ASN1_item_free((ASN1_VALUE *)a, &PBEPARAM_it); 117 } 118 119 120 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */ 121 122 int 123 PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter, 124 const unsigned char *salt, int saltlen) 125 { 126 PBEPARAM *pbe = NULL; 127 ASN1_STRING *pbe_str = NULL; 128 unsigned char *sstr; 129 130 if ((pbe = PBEPARAM_new()) == NULL) { 131 ASN1error(ERR_R_MALLOC_FAILURE); 132 goto err; 133 } 134 if (iter <= 0) 135 iter = PKCS5_DEFAULT_ITER; 136 if (!ASN1_INTEGER_set(pbe->iter, iter)) { 137 ASN1error(ERR_R_MALLOC_FAILURE); 138 goto err; 139 } 140 if (!saltlen) 141 saltlen = PKCS5_SALT_LEN; 142 if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) { 143 ASN1error(ERR_R_MALLOC_FAILURE); 144 goto err; 145 } 146 sstr = ASN1_STRING_data(pbe->salt); 147 if (salt) 148 memcpy(sstr, salt, saltlen); 149 else 150 arc4random_buf(sstr, saltlen); 151 152 if (!ASN1_item_pack(pbe, &PBEPARAM_it, &pbe_str)) { 153 ASN1error(ERR_R_MALLOC_FAILURE); 154 goto err; 155 } 156 157 PBEPARAM_free(pbe); 158 pbe = NULL; 159 160 if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str)) 161 return 1; 162 163 err: 164 if (pbe != NULL) 165 PBEPARAM_free(pbe); 166 ASN1_STRING_free(pbe_str); 167 return 0; 168 } 169 170 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */ 171 172 X509_ALGOR * 173 PKCS5_pbe_set(int alg, int iter, const unsigned char *salt, int saltlen) 174 { 175 X509_ALGOR *ret; 176 ret = X509_ALGOR_new(); 177 if (!ret) { 178 ASN1error(ERR_R_MALLOC_FAILURE); 179 return NULL; 180 } 181 182 if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen)) 183 return ret; 184 185 X509_ALGOR_free(ret); 186 return NULL; 187 } 188