crypto/pkcs12/p12_npas.c

   1 /* p12_npas.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 <stdlib.h>
  62 #include <string.h>
  63 #include <openssl/pem.h>
  64 #include <openssl/err.h>
  65 #include <openssl/pkcs12.h>
  66
  67 /* PKCS#12 password change routine */
  68
  69 static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass);
  70 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
  71                         char *newpass);
  72 static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass);
  73 static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen);
  74
  75 /*
  76  * Change the password on a PKCS#12 structure.
  77  */
  78
  79 int PKCS12_newpass(PKCS12 *p12, char *oldpass, char *newpass)
  80 {
  81     /* Check for NULL PKCS12 structure */
  82
  83     if (!p12) {
  84         PKCS12err(PKCS12_F_PKCS12_NEWPASS,
  85                   PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  86         return 0;
  87     }
  88
  89     /* Check the mac */
  90
  91     if (!PKCS12_verify_mac(p12, oldpass, -1)) {
  92         PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_MAC_VERIFY_FAILURE);
  93         return 0;
  94     }
  95
  96     if (!newpass_p12(p12, oldpass, newpass)) {
  97         PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_PARSE_ERROR);
  98         return 0;
  99     }
 100
 101     return 1;
 102 }
 103
 104 /* Parse the outer PKCS#12 structure */
 105
 106 static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass)
 107 {
 108     STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
 109     STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
 110     int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0;
 111     PKCS7 *p7, *p7new;
 112     ASN1_OCTET_STRING *p12_data_tmp = NULL;
 113     unsigned char mac[EVP_MAX_MD_SIZE];
 114     unsigned int maclen;
 115     int rv = 0;
 116
 117     if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
 118         goto err;
 119     if ((newsafes = sk_PKCS7_new_null()) == NULL)
 120         goto err;
 121     for (i = 0; i < sk_PKCS7_num(asafes); i++) {
 122         p7 = sk_PKCS7_value(asafes, i);
 123         bagnid = OBJ_obj2nid(p7->type);
 124         if (bagnid == NID_pkcs7_data) {
 125             bags = PKCS12_unpack_p7data(p7);
 126         } else if (bagnid == NID_pkcs7_encrypted) {
 127             bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
 128             if (!alg_get(p7->d.encrypted->enc_data->algorithm,
 129                          &pbe_nid, &pbe_iter, &pbe_saltlen))
 130                 goto err;
 131         } else {
 132             continue;
 133         }
 134         if (bags == NULL)
 135             goto err;
 136         if (!newpass_bags(bags, oldpass, newpass))
 137             goto err;
 138         /* Repack bag in same form with new password */
 139         if (bagnid == NID_pkcs7_data)
 140             p7new = PKCS12_pack_p7data(bags);
 141         else
 142             p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
 143                                           pbe_saltlen, pbe_iter, bags);
 144         if (!p7new || !sk_PKCS7_push(newsafes, p7new))
 145             goto err;
 146         sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 147         bags = NULL;
 148     }
 149
 150     /* Repack safe: save old safe in case of error */
 151
 152     p12_data_tmp = p12->authsafes->d.data;
 153     if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
 154         goto err;
 155     if (!PKCS12_pack_authsafes(p12, newsafes))
 156         goto err;
 157     if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
 158         goto err;
 159     if (!ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))
 160         goto err;
 161
 162     rv = 1;
 163
 164 err:
 165     /* Restore old safe if necessary */
 166     if (rv == 1) {
 167         ASN1_OCTET_STRING_free(p12_data_tmp);
 168     } else if (p12_data_tmp != NULL) {
 169         ASN1_OCTET_STRING_free(p12->authsafes->d.data);
 170         p12->authsafes->d.data = p12_data_tmp;
 171     }
 172     sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 173     sk_PKCS7_pop_free(asafes, PKCS7_free);
 174     sk_PKCS7_pop_free(newsafes, PKCS7_free);
 175     return rv;
 176 }
 177
 178 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
 179                         char *newpass)
 180 {
 181     int i;
 182     for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
 183         if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
 184             return 0;
 185     }
 186     return 1;
 187 }
 188
 189 /* Change password of safebag: only needs handle shrouded keybags */
 190
 191 static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass)
 192 {
 193     PKCS8_PRIV_KEY_INFO *p8;
 194     X509_SIG *p8new;
 195     int p8_nid, p8_saltlen, p8_iter;
 196
 197     if (M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag)
 198         return 1;
 199
 200     if (!(p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)))
 201         return 0;
 202     if (!alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, &p8_saltlen))
 203         return 0;
 204     p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
 205                           p8_iter, p8);
 206     PKCS8_PRIV_KEY_INFO_free(p8);
 207     if (p8new == NULL)
 208         return 0;
 209     X509_SIG_free(bag->value.shkeybag);
 210     bag->value.shkeybag = p8new;
 211     return 1;
 212 }
 213
 214 static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen)
 215 {
 216     PBEPARAM *pbe;
 217     const unsigned char *p;
 218
 219     p = alg->parameter->value.sequence->data;
 220     pbe = d2i_PBEPARAM(NULL, &p, alg->parameter->value.sequence->length);
 221     if (!pbe)
 222         return 0;
 223     *pnid = OBJ_obj2nid(alg->algorithm);
 224     *piter = ASN1_INTEGER_get(pbe->iter);
 225     *psaltlen = pbe->salt->length;
 226     PBEPARAM_free(pbe);
 227     return 1;
 228 }