1 /* $OpenBSD: p12_npas.c,v 1.9 2014/07/08 09:24:53 jsing Exp $ */ 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 79 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 107 newpass_p12(PKCS12 *p12, char *oldpass, char *newpass) 108 { 109 STACK_OF(PKCS7) *asafes, *newsafes; 110 STACK_OF(PKCS12_SAFEBAG) *bags; 111 int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0; 112 PKCS7 *p7, *p7new; 113 ASN1_OCTET_STRING *p12_data_tmp = NULL, *macnew = NULL; 114 unsigned char mac[EVP_MAX_MD_SIZE]; 115 unsigned int maclen; 116 117 if (!(asafes = PKCS12_unpack_authsafes(p12))) 118 return 0; 119 if (!(newsafes = sk_PKCS7_new_null())) 120 return 0; 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 sk_PKCS12_SAFEBAG_pop_free(bags, 131 PKCS12_SAFEBAG_free); 132 bags = NULL; 133 } 134 } else 135 continue; 136 if (!bags) { 137 sk_PKCS7_pop_free(asafes, PKCS7_free); 138 return 0; 139 } 140 if (!newpass_bags(bags, oldpass, newpass)) { 141 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); 142 sk_PKCS7_pop_free(asafes, PKCS7_free); 143 return 0; 144 } 145 /* Repack bag in same form with new password */ 146 if (bagnid == NID_pkcs7_data) 147 p7new = PKCS12_pack_p7data(bags); 148 else 149 p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, 150 NULL, pbe_saltlen, pbe_iter, bags); 151 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free); 152 if (!p7new) { 153 sk_PKCS7_pop_free(asafes, PKCS7_free); 154 return 0; 155 } 156 sk_PKCS7_push(newsafes, p7new); 157 } 158 sk_PKCS7_pop_free(asafes, PKCS7_free); 159 160 /* Repack safe: save old safe in case of error */ 161 162 p12_data_tmp = p12->authsafes->d.data; 163 if (!(p12->authsafes->d.data = ASN1_OCTET_STRING_new())) 164 goto saferr; 165 if (!PKCS12_pack_authsafes(p12, newsafes)) 166 goto saferr; 167 168 if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen)) 169 goto saferr; 170 if (!(macnew = ASN1_OCTET_STRING_new())) 171 goto saferr; 172 if (!ASN1_OCTET_STRING_set(macnew, mac, maclen)) 173 goto saferr; 174 ASN1_OCTET_STRING_free(p12->mac->dinfo->digest); 175 p12->mac->dinfo->digest = macnew; 176 ASN1_OCTET_STRING_free(p12_data_tmp); 177 178 return 1; 179 180 saferr: 181 /* Restore old safe */ 182 ASN1_OCTET_STRING_free(p12->authsafes->d.data); 183 ASN1_OCTET_STRING_free(macnew); 184 p12->authsafes->d.data = p12_data_tmp; 185 return 0; 186 } 187 188 189 static int 190 newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass, char *newpass) 191 { 192 int i; 193 194 for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) { 195 if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), 196 oldpass, newpass)) 197 return 0; 198 } 199 return 1; 200 } 201 202 /* Change password of safebag: only needs handle shrouded keybags */ 203 204 static int 205 newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass) 206 { 207 PKCS8_PRIV_KEY_INFO *p8; 208 X509_SIG *p8new; 209 int p8_nid, p8_saltlen, p8_iter; 210 211 if (M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag) 212 return 1; 213 214 if (!(p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1))) 215 return 0; 216 if (!alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, 217 &p8_saltlen)) 218 return 0; 219 if (!(p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen, 220 p8_iter, p8))) return 0; 221 X509_SIG_free(bag->value.shkeybag); 222 bag->value.shkeybag = p8new; 223 return 1; 224 } 225 226 static int 227 alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen) 228 { 229 PBEPARAM *pbe; 230 const unsigned char *p; 231 232 p = alg->parameter->value.sequence->data; 233 pbe = d2i_PBEPARAM(NULL, &p, alg->parameter->value.sequence->length); 234 if (!pbe) 235 return 0; 236 *pnid = OBJ_obj2nid(alg->algorithm); 237 *piter = ASN1_INTEGER_get(pbe->iter); 238 *psaltlen = pbe->salt->length; 239 PBEPARAM_free(pbe); 240 return 1; 241 } 242