1 /* $OpenBSD: p5_pbe.c,v 1.16 2014/07/11 08:44:47 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 <string.h> 61 62 #include <openssl/asn1t.h> 63 #include <openssl/err.h> 64 #include <openssl/rand.h> 65 #include <openssl/x509.h> 66 67 /* PKCS#5 password based encryption structure */ 68 69 ASN1_SEQUENCE(PBEPARAM) = { 70 ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING), 71 ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER) 72 } ASN1_SEQUENCE_END(PBEPARAM) 73 74 IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM) 75 76 77 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */ 78 79 int 80 PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter, 81 const unsigned char *salt, int saltlen) 82 { 83 PBEPARAM *pbe = NULL; 84 ASN1_STRING *pbe_str = NULL; 85 unsigned char *sstr; 86 87 pbe = PBEPARAM_new(); 88 if (!pbe) { 89 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 90 goto err; 91 } 92 if (iter <= 0) 93 iter = PKCS5_DEFAULT_ITER; 94 if (!ASN1_INTEGER_set(pbe->iter, iter)) { 95 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 96 goto err; 97 } 98 if (!saltlen) 99 saltlen = PKCS5_SALT_LEN; 100 if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) { 101 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 102 goto err; 103 } 104 sstr = ASN1_STRING_data(pbe->salt); 105 if (salt) 106 memcpy(sstr, salt, saltlen); 107 else if (RAND_pseudo_bytes(sstr, saltlen) < 0) 108 goto err; 109 110 if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) { 111 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 112 goto err; 113 } 114 115 PBEPARAM_free(pbe); 116 pbe = NULL; 117 118 if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str)) 119 return 1; 120 121 err: 122 if (pbe != NULL) 123 PBEPARAM_free(pbe); 124 ASN1_STRING_free(pbe_str); 125 return 0; 126 } 127 128 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */ 129 130 X509_ALGOR * 131 PKCS5_pbe_set(int alg, int iter, const unsigned char *salt, int saltlen) 132 { 133 X509_ALGOR *ret; 134 ret = X509_ALGOR_new(); 135 if (!ret) { 136 ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE); 137 return NULL; 138 } 139 140 if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen)) 141 return ret; 142 143 X509_ALGOR_free(ret); 144 return NULL; 145 } 146