crypto/asn1/p5_pbe.c

   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
  68 ASN1_SEQUENCE(PBEPARAM) = {
  69         ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
  70         ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
  71 } ASN1_SEQUENCE_END(PBEPARAM)
  72
  73 IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
  74
  75 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
  76
  77 X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt, int saltlen)
  78 {
  79     PBEPARAM *pbe = NULL;
  80     ASN1_OBJECT *al;
  81     X509_ALGOR *algor;
  82     ASN1_TYPE *astype = NULL;
  83
  84     if (!(pbe = PBEPARAM_new())) {
  85         ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
  86         goto err;
  87     }
  88     if (iter <= 0)
  89         iter = PKCS5_DEFAULT_ITER;
  90     if (!ASN1_INTEGER_set(pbe->iter, iter)) {
  91         ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
  92         goto err;
  93     }
  94     if (!saltlen)
  95         saltlen = PKCS5_SALT_LEN;
  96     if (!(pbe->salt->data = OPENSSL_malloc(saltlen))) {
  97         ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
  98         goto err;
  99     }
 100     pbe->salt->length = saltlen;
 101     if (salt)
 102         memcpy(pbe->salt->data, salt, saltlen);
 103     else if (RAND_pseudo_bytes(pbe->salt->data, saltlen) < 0)
 104         goto err;
 105
 106     if (!(astype = ASN1_TYPE_new())) {
 107         ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
 108         goto err;
 109     }
 110
 111     astype->type = V_ASN1_SEQUENCE;
 112     if (!ASN1_pack_string_of(PBEPARAM, pbe, i2d_PBEPARAM,
 113                              &astype->value.sequence)) {
 114         ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
 115         goto err;
 116     }
 117     PBEPARAM_free(pbe);
 118     pbe = NULL;
 119
 120     al = OBJ_nid2obj(alg);      /* never need to free al */
 121     if (!(algor = X509_ALGOR_new())) {
 122         ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
 123         goto err;
 124     }
 125     ASN1_OBJECT_free(algor->algorithm);
 126     algor->algorithm = al;
 127     algor->parameter = astype;
 128
 129     return (algor);
 130  err:
 131     if (pbe != NULL)
 132         PBEPARAM_free(pbe);
 133     if (astype != NULL)
 134         ASN1_TYPE_free(astype);
 135     return NULL;
 136 }