1 /* $OpenBSD: p5_pbe.c,v 1.23 2021/12/25 13:17:48 jsing 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 /* PKCS#5 password based encryption structure */ 68 69 static const ASN1_TEMPLATE PBEPARAM_seq_tt[] = { 70 { 71 .offset = offsetof(PBEPARAM, salt), 72 .field_name = "salt", 73 .item = &ASN1_OCTET_STRING_it, 74 }, 75 { 76 .offset = offsetof(PBEPARAM, iter), 77 .field_name = "iter", 78 .item = &ASN1_INTEGER_it, 79 }, 80 }; 81 82 const ASN1_ITEM PBEPARAM_it = { 83 .itype = ASN1_ITYPE_SEQUENCE, 84 .utype = V_ASN1_SEQUENCE, 85 .templates = PBEPARAM_seq_tt, 86 .tcount = sizeof(PBEPARAM_seq_tt) / sizeof(ASN1_TEMPLATE), 87 .size = sizeof(PBEPARAM), 88 .sname = "PBEPARAM", 89 }; 90 91 92 PBEPARAM * 93 d2i_PBEPARAM(PBEPARAM **a, const unsigned char **in, long len) 94 { 95 return (PBEPARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 96 &PBEPARAM_it); 97 } 98 99 int 100 i2d_PBEPARAM(PBEPARAM *a, unsigned char **out) 101 { 102 return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBEPARAM_it); 103 } 104 105 PBEPARAM * 106 PBEPARAM_new(void) 107 { 108 return (PBEPARAM *)ASN1_item_new(&PBEPARAM_it); 109 } 110 111 void 112 PBEPARAM_free(PBEPARAM *a) 113 { 114 ASN1_item_free((ASN1_VALUE *)a, &PBEPARAM_it); 115 } 116 117 118 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */ 119 120 int 121 PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter, 122 const unsigned char *salt, int saltlen) 123 { 124 PBEPARAM *pbe = NULL; 125 ASN1_STRING *pbe_str = NULL; 126 unsigned char *sstr; 127 128 pbe = PBEPARAM_new(); 129 if (!pbe) { 130 ASN1error(ERR_R_MALLOC_FAILURE); 131 goto err; 132 } 133 if (iter <= 0) 134 iter = PKCS5_DEFAULT_ITER; 135 if (!ASN1_INTEGER_set(pbe->iter, iter)) { 136 ASN1error(ERR_R_MALLOC_FAILURE); 137 goto err; 138 } 139 if (!saltlen) 140 saltlen = PKCS5_SALT_LEN; 141 if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) { 142 ASN1error(ERR_R_MALLOC_FAILURE); 143 goto err; 144 } 145 sstr = ASN1_STRING_data(pbe->salt); 146 if (salt) 147 memcpy(sstr, salt, saltlen); 148 else 149 arc4random_buf(sstr, saltlen); 150 151 if (!ASN1_item_pack(pbe, &PBEPARAM_it, &pbe_str)) { 152 ASN1error(ERR_R_MALLOC_FAILURE); 153 goto err; 154 } 155 156 PBEPARAM_free(pbe); 157 pbe = NULL; 158 159 if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str)) 160 return 1; 161 162 err: 163 if (pbe != NULL) 164 PBEPARAM_free(pbe); 165 ASN1_STRING_free(pbe_str); 166 return 0; 167 } 168 169 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */ 170 171 X509_ALGOR * 172 PKCS5_pbe_set(int alg, int iter, const unsigned char *salt, int saltlen) 173 { 174 X509_ALGOR *ret; 175 ret = X509_ALGOR_new(); 176 if (!ret) { 177 ASN1error(ERR_R_MALLOC_FAILURE); 178 return NULL; 179 } 180 181 if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen)) 182 return ret; 183 184 X509_ALGOR_free(ret); 185 return NULL; 186 } 187