p12_npas.c revision 296465 
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
69static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass);
70static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
71                        char *newpass);
72static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass);
73static 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
79int 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
106static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass)
107{
108    STACK_OF(PKCS7) *asafes, *newsafes;
109    STACK_OF(PKCS12_SAFEBAG) *bags;
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, *macnew = NULL;
113    unsigned char mac[EVP_MAX_MD_SIZE];
114    unsigned int maclen;
115
116    if (!(asafes = PKCS12_unpack_authsafes(p12)))
117        return 0;
118    if (!(newsafes = sk_PKCS7_new_null()))
119        return 0;
120    for (i = 0; i < sk_PKCS7_num(asafes); i++) {
121        p7 = sk_PKCS7_value(asafes, i);
122        bagnid = OBJ_obj2nid(p7->type);
123        if (bagnid == NID_pkcs7_data) {
124            bags = PKCS12_unpack_p7data(p7);
125        } else if (bagnid == NID_pkcs7_encrypted) {
126            bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
127            if (!alg_get(p7->d.encrypted->enc_data->algorithm,
128                         &pbe_nid, &pbe_iter, &pbe_saltlen)) {
129                sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
130                bags = NULL;
131            }
132        } else
133            continue;
134        if (!bags) {
135            sk_PKCS7_pop_free(asafes, PKCS7_free);
136            return 0;
137        }
138        if (!newpass_bags(bags, oldpass, newpass)) {
139            sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
140            sk_PKCS7_pop_free(asafes, PKCS7_free);
141            return 0;
142        }
143        /* Repack bag in same form with new password */
144        if (bagnid == NID_pkcs7_data)
145            p7new = PKCS12_pack_p7data(bags);
146        else
147            p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
148                                          pbe_saltlen, pbe_iter, bags);
149        sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
150        if (!p7new) {
151            sk_PKCS7_pop_free(asafes, PKCS7_free);
152            return 0;
153        }
154        sk_PKCS7_push(newsafes, p7new);
155    }
156    sk_PKCS7_pop_free(asafes, PKCS7_free);
157
158    /* Repack safe: save old safe in case of error */
159
160    p12_data_tmp = p12->authsafes->d.data;
161    if (!(p12->authsafes->d.data = ASN1_OCTET_STRING_new()))
162        goto saferr;
163    if (!PKCS12_pack_authsafes(p12, newsafes))
164        goto saferr;
165
166    if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
167        goto saferr;
168    if (!(macnew = ASN1_OCTET_STRING_new()))
169        goto saferr;
170    if (!ASN1_OCTET_STRING_set(macnew, mac, maclen))
171        goto saferr;
172    ASN1_OCTET_STRING_free(p12->mac->dinfo->digest);
173    p12->mac->dinfo->digest = macnew;
174    ASN1_OCTET_STRING_free(p12_data_tmp);
175
176    return 1;
177
178 saferr:
179    /* Restore old safe */
180    ASN1_OCTET_STRING_free(p12->authsafes->d.data);
181    ASN1_OCTET_STRING_free(macnew);
182    p12->authsafes->d.data = p12_data_tmp;
183    return 0;
184
185}
186
187static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
188                        char *newpass)
189{
190    int i;
191    for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
192        if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
193            return 0;
194    }
195    return 1;
196}
197
198/* Change password of safebag: only needs handle shrouded keybags */
199
200static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass)
201{
202    PKCS8_PRIV_KEY_INFO *p8;
203    X509_SIG *p8new;
204    int p8_nid, p8_saltlen, p8_iter;
205
206    if (M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag)
207        return 1;
208
209    if (!(p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)))
210        return 0;
211    if (!alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, &p8_saltlen))
212        return 0;
213    if (!(p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
214                                p8_iter, p8)))
215        return 0;
216    X509_SIG_free(bag->value.shkeybag);
217    bag->value.shkeybag = p8new;
218    return 1;
219}
220
221static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen)
222{
223    PBEPARAM *pbe;
224    const unsigned char *p;
225
226    p = alg->parameter->value.sequence->data;
227    pbe = d2i_PBEPARAM(NULL, &p, alg->parameter->value.sequence->length);
228    if (!pbe)
229        return 0;
230    *pnid = OBJ_obj2nid(alg->algorithm);
231    *piter = ASN1_INTEGER_get(pbe->iter);
232    *psaltlen = pbe->salt->length;
233    PBEPARAM_free(pbe);
234    return 1;
235}
236