1 /* p5_pbe.c */ 2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 "cryptlib.h" 61 #include <openssl/asn1t.h> 62 #include <openssl/x509.h> 63 #include <openssl/rand.h> 64 65 /* PKCS#5 password based encryption structure */ 66 67 ASN1_SEQUENCE(PBEPARAM) = { 68 ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING), 69 ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER) 70 } ASN1_SEQUENCE_END(PBEPARAM) 71 72 IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM) 73 74 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */ 75 76 X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt, 77 int saltlen) 78 { 79 PBEPARAM *pbe; 80 ASN1_OBJECT *al; 81 X509_ALGOR *algor; 82 ASN1_TYPE *astype; 83 84 if (!(pbe = PBEPARAM_new ())) { 85 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 86 return NULL; 87 } 88 if(iter <= 0) iter = PKCS5_DEFAULT_ITER; 89 ASN1_INTEGER_set (pbe->iter, iter); 90 if (!saltlen) saltlen = PKCS5_SALT_LEN; 91 if (!(pbe->salt->data = OPENSSL_malloc (saltlen))) { 92 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 93 return NULL; 94 } 95 pbe->salt->length = saltlen; 96 if (salt) memcpy (pbe->salt->data, salt, saltlen); 97 else if (RAND_pseudo_bytes (pbe->salt->data, saltlen) < 0) 98 return NULL; 99 100 if (!(astype = ASN1_TYPE_new())) { 101 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 102 return NULL; 103 } 104 105 astype->type = V_ASN1_SEQUENCE; 106 if(!ASN1_pack_string(pbe, i2d_PBEPARAM, &astype->value.sequence)) { 107 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 108 return NULL; 109 } 110 PBEPARAM_free (pbe); 111 112 al = OBJ_nid2obj(alg); /* never need to free al */ 113 if (!(algor = X509_ALGOR_new())) { 114 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 115 return NULL; 116 } 117 ASN1_OBJECT_free(algor->algorithm); 118 algor->algorithm = al; 119 algor->parameter = astype; 120 121 return (algor); 122 } 123