p5_pbe.c revision 296341
1/* p5_pbe.c */ 2/* 3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4 * 1999. 5 */ 6/* ==================================================================== 7 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59 60#include <stdio.h> 61#include "cryptlib.h" 62#include <openssl/asn1t.h> 63#include <openssl/x509.h> 64#include <openssl/rand.h> 65 66/* PKCS#5 password based encryption structure */ 67 68ASN1_SEQUENCE(PBEPARAM) = { 69 ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING), 70 ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER) 71} ASN1_SEQUENCE_END(PBEPARAM) 72 73IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM) 74 75/* Set an algorithm identifier for a PKCS#5 PBE algorithm */ 76 77int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter, 78 const unsigned char *salt, int saltlen) 79{ 80 PBEPARAM *pbe = NULL; 81 ASN1_STRING *pbe_str = NULL; 82 unsigned char *sstr; 83 84 pbe = PBEPARAM_new(); 85 if (!pbe) { 86 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 87 goto err; 88 } 89 if (iter <= 0) 90 iter = PKCS5_DEFAULT_ITER; 91 if (!ASN1_INTEGER_set(pbe->iter, iter)) { 92 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 93 goto err; 94 } 95 if (!saltlen) 96 saltlen = PKCS5_SALT_LEN; 97 if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) { 98 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 99 goto err; 100 } 101 sstr = ASN1_STRING_data(pbe->salt); 102 if (salt) 103 memcpy(sstr, salt, saltlen); 104 else if (RAND_pseudo_bytes(sstr, saltlen) < 0) 105 goto err; 106 107 if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) { 108 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); 109 goto err; 110 } 111 112 PBEPARAM_free(pbe); 113 pbe = NULL; 114 115 if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str)) 116 return 1; 117 118 err: 119 if (pbe != NULL) 120 PBEPARAM_free(pbe); 121 if (pbe_str != NULL) 122 ASN1_STRING_free(pbe_str); 123 return 0; 124} 125 126/* Return an algorithm identifier for a PKCS#5 PBE algorithm */ 127 128X509_ALGOR *PKCS5_pbe_set(int alg, int iter, 129 const unsigned char *salt, int saltlen) 130{ 131 X509_ALGOR *ret; 132 ret = X509_ALGOR_new(); 133 if (!ret) { 134 ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE); 135 return NULL; 136 } 137 138 if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen)) 139 return ret; 140 141 X509_ALGOR_free(ret); 142 return NULL; 143} 144