crypto/pkcs12/p12_npas.c

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