Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | if (!alg_get(p7->d.encrypted->enc_data->algorithm, |
| 124 | &pbe_nid, &pbe_iter, &pbe_saltlen)) |
| 125 | { |
| 126 | sk_PKCS12_SAFEBAG_pop_free(bags, |
| 127 | PKCS12_SAFEBAG_free); |
| 128 | bags = NULL; |
| 129 | } |
| 130 | } else continue; |
| 131 | if (!bags) { |
| 132 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 133 | return 0; |
| 134 | } |
| 135 | if (!newpass_bags(bags, oldpass, newpass)) { |
| 136 | sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); |
| 137 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 138 | return 0; |
| 139 | } |
| 140 | /* Repack bag in same form with new password */ |
| 141 | if (bagnid == NID_pkcs7_data) p7new = PKCS12_pack_p7data(bags); |
| 142 | else p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL, |
| 143 | pbe_saltlen, pbe_iter, bags); |
| 144 | sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); |
| 145 | if(!p7new) { |
| 146 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 147 | return 0; |
| 148 | } |
| 149 | sk_PKCS7_push(newsafes, p7new); |
| 150 | } |
| 151 | sk_PKCS7_pop_free(asafes, PKCS7_free); |
| 152 | |
| 153 | /* Repack safe: save old safe in case of error */ |
| 154 | |
| 155 | p12_data_tmp = p12->authsafes->d.data; |
| 156 | if(!(p12->authsafes->d.data = ASN1_OCTET_STRING_new())) goto saferr; |
| 157 | if(!PKCS12_pack_authsafes(p12, newsafes)) goto saferr; |
| 158 | |
| 159 | if(!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen)) goto saferr; |
| 160 | if(!(macnew = ASN1_OCTET_STRING_new())) goto saferr; |
| 161 | if(!ASN1_OCTET_STRING_set(macnew, mac, maclen)) goto saferr; |
| 162 | ASN1_OCTET_STRING_free(p12->mac->dinfo->digest); |
| 163 | p12->mac->dinfo->digest = macnew; |
| 164 | ASN1_OCTET_STRING_free(p12_data_tmp); |
| 165 | |
| 166 | return 1; |
| 167 | |
| 168 | saferr: |
| 169 | /* Restore old safe */ |
| 170 | ASN1_OCTET_STRING_free(p12->authsafes->d.data); |
| 171 | ASN1_OCTET_STRING_free(macnew); |
| 172 | p12->authsafes->d.data = p12_data_tmp; |
| 173 | return 0; |
| 174 | |
| 175 | } |
| 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), |
| 184 | oldpass, newpass)) |
| 185 | return 0; |
| 186 | } |
| 187 | return 1; |
| 188 | } |
| 189 | |
| 190 | /* Change password of safebag: only needs handle shrouded keybags */ |
| 191 | |
| 192 | static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass) |
| 193 | { |
| 194 | PKCS8_PRIV_KEY_INFO *p8; |
| 195 | X509_SIG *p8new; |
| 196 | int p8_nid, p8_saltlen, p8_iter; |
| 197 | |
| 198 | if(M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag) return 1; |
| 199 | |
| 200 | if (!(p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1))) return 0; |
| 201 | if (!alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, |
| 202 | &p8_saltlen)) |
| 203 | return 0; |
| 204 | if(!(p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen, |
| 205 | p8_iter, p8))) return 0; |
| 206 | X509_SIG_free(bag->value.shkeybag); |
| 207 | bag->value.shkeybag = p8new; |
| 208 | return 1; |
| 209 | } |
| 210 | |
| 211 | static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen) |
| 212 | { |
| 213 | PBEPARAM *pbe; |
| 214 | const unsigned char *p; |
| 215 | |
| 216 | p = alg->parameter->value.sequence->data; |
| 217 | pbe = d2i_PBEPARAM(NULL, &p, alg->parameter->value.sequence->length); |
| 218 | if (!pbe) |
| 219 | return 0; |
| 220 | *pnid = OBJ_obj2nid(alg->algorithm); |
| 221 | *piter = ASN1_INTEGER_get(pbe->iter); |
| 222 | *psaltlen = pbe->salt->length; |
| 223 | PBEPARAM_free(pbe); |
| 224 | return 1; |
| 225 | } |