crypto/pkcs12/p12_npas.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 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 <stdlib.h>
  61 #include <string.h>
  62 #include <openssl/pem.h>
  63 #include <openssl/err.h>
  64 #include <openssl/pkcs12.h>
  65
  66 /* PKCS#12 password change routine */
  67
  68 static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass);
  69 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
  70                         char *newpass);
  71 static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass);
  72 static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen);
  73
  74 /*
  75  * Change the password on a PKCS#12 structure.
  76  */
  77
  78 int PKCS12_newpass(PKCS12 *p12, char *oldpass, char *newpass)
  79 {
  80     /* Check for NULL PKCS12 structure */
  81
  82     if (!p12) {
  83         PKCS12err(PKCS12_F_PKCS12_NEWPASS,
  84                   PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  85         return 0;
  86     }
  87
  88     /* Check the mac */
  89
  90     if (!PKCS12_verify_mac(p12, oldpass, -1)) {
  91         PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_MAC_VERIFY_FAILURE);
  92         return 0;
  93     }
  94
  95     if (!newpass_p12(p12, oldpass, newpass)) {
  96         PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_PARSE_ERROR);
  97         return 0;
  98     }
  99
 100     return 1;
 101 }
 102
 103 /* Parse the outer PKCS#12 structure */
 104
 105 static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass)
 106 {
 107     STACK_OF(PKCS7) *asafes, *newsafes;
 108     STACK_OF(PKCS12_SAFEBAG) *bags;
 109     int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0;
 110     PKCS7 *p7, *p7new;
 111     ASN1_OCTET_STRING *p12_data_tmp = NULL, *macnew = NULL;
 112     unsigned char mac[EVP_MAX_MD_SIZE];
 113     unsigned int maclen;
 114
 115     if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
 116         return 0;
 117     if ((newsafes = sk_PKCS7_new_null()) == NULL)
 118         return 0;
 119     for (i = 0; i < sk_PKCS7_num(asafes); i++) {
 120         p7 = sk_PKCS7_value(asafes, i);
 121         bagnid = OBJ_obj2nid(p7->type);
 122         if (bagnid == NID_pkcs7_data) {
 123             bags = PKCS12_unpack_p7data(p7);
 124         } else if (bagnid == NID_pkcs7_encrypted) {
 125             bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
 126             if (!alg_get(p7->d.encrypted->enc_data->algorithm,
 127                          &pbe_nid, &pbe_iter, &pbe_saltlen)) {
 128                 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 129                 bags = NULL;
 130             }
 131         } else
 132             continue;
 133         if (!bags) {
 134             sk_PKCS7_pop_free(asafes, PKCS7_free);
 135             return 0;
 136         }
 137         if (!newpass_bags(bags, oldpass, newpass)) {
 138             sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 139             sk_PKCS7_pop_free(asafes, PKCS7_free);
 140             return 0;
 141         }
 142         /* Repack bag in same form with new password */
 143         if (bagnid == NID_pkcs7_data)
 144             p7new = PKCS12_pack_p7data(bags);
 145         else
 146             p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
 147                                           pbe_saltlen, pbe_iter, bags);
 148         sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 149         if (!p7new) {
 150             sk_PKCS7_pop_free(asafes, PKCS7_free);
 151             return 0;
 152         }
 153         sk_PKCS7_push(newsafes, p7new);
 154     }
 155     sk_PKCS7_pop_free(asafes, PKCS7_free);
 156
 157     /* Repack safe: save old safe in case of error */
 158
 159     p12_data_tmp = p12->authsafes->d.data;
 160     if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
 161         goto saferr;
 162     if (!PKCS12_pack_authsafes(p12, newsafes))
 163         goto saferr;
 164
 165     if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
 166         goto saferr;
 167     if ((macnew = ASN1_OCTET_STRING_new()) == NULL)
 168         goto saferr;
 169     if (!ASN1_OCTET_STRING_set(macnew, mac, maclen))
 170         goto saferr;
 171     ASN1_OCTET_STRING_free(p12->mac->dinfo->digest);
 172     p12->mac->dinfo->digest = macnew;
 173     ASN1_OCTET_STRING_free(p12_data_tmp);
 174
 175     return 1;
 176
 177  saferr:
 178     /* Restore old safe */
 179     ASN1_OCTET_STRING_free(p12->authsafes->d.data);
 180     ASN1_OCTET_STRING_free(macnew);
 181     p12->authsafes->d.data = p12_data_tmp;
 182     return 0;
 183
 184 }
 185
 186 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
 187                         char *newpass)
 188 {
 189     int i;
 190     for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
 191         if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
 192             return 0;
 193     }
 194     return 1;
 195 }
 196
 197 /* Change password of safebag: only needs handle shrouded keybags */
 198
 199 static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass)
 200 {
 201     PKCS8_PRIV_KEY_INFO *p8;
 202     X509_SIG *p8new;
 203     int p8_nid, p8_saltlen, p8_iter;
 204
 205     if (M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag)
 206         return 1;
 207
 208     if ((p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)) == NULL)
 209         return 0;
 210     if (!alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, &p8_saltlen))
 211         return 0;
 212     if ((p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
 213                                 p8_iter, p8)) == NULL)
 214         return 0;
 215     X509_SIG_free(bag->value.shkeybag);
 216     bag->value.shkeybag = p8new;
 217     return 1;
 218 }
 219
 220 static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen)
 221 {
 222     PBEPARAM *pbe;
 223     pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), alg->parameter);
 224     if (!pbe)
 225         return 0;
 226     *pnid = OBJ_obj2nid(alg->algorithm);
 227     *piter = ASN1_INTEGER_get(pbe->iter);
 228     *psaltlen = pbe->salt->length;
 229     PBEPARAM_free(pbe);
 230     return 1;
 231 }