p12_npas.c revision 306195 
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, const char *oldpass, const char *newpass);
70static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
71                        const char *newpass);
72static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
73                        const char *newpass);
74static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen);
75
76/*
77 * Change the password on a PKCS#12 structure.
78 */
79
80int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass)
81{
82    /* Check for NULL PKCS12 structure */
83
84    if (!p12) {
85        PKCS12err(PKCS12_F_PKCS12_NEWPASS,
86                  PKCS12_R_INVALID_NULL_PKCS12_POINTER);
87        return 0;
88    }
89
90    /* Check the mac */
91
92    if (!PKCS12_verify_mac(p12, oldpass, -1)) {
93        PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_MAC_VERIFY_FAILURE);
94        return 0;
95    }
96
97    if (!newpass_p12(p12, oldpass, newpass)) {
98        PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_PARSE_ERROR);
99        return 0;
100    }
101
102    return 1;
103}
104
105/* Parse the outer PKCS#12 structure */
106
107static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass)
108{
109    STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
110    STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
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;
114    unsigned char mac[EVP_MAX_MD_SIZE];
115    unsigned int maclen;
116    int rv = 0;
117
118    if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
119        goto err;
120    if ((newsafes = sk_PKCS7_new_null()) == NULL)
121        goto err;
122    for (i = 0; i < sk_PKCS7_num(asafes); i++) {
123        p7 = sk_PKCS7_value(asafes, i);
124        bagnid = OBJ_obj2nid(p7->type);
125        if (bagnid == NID_pkcs7_data) {
126            bags = PKCS12_unpack_p7data(p7);
127        } else if (bagnid == NID_pkcs7_encrypted) {
128            bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
129            if (!alg_get(p7->d.encrypted->enc_data->algorithm,
130                         &pbe_nid, &pbe_iter, &pbe_saltlen))
131                goto err;
132        } else {
133            continue;
134        }
135        if (bags == NULL)
136            goto err;
137        if (!newpass_bags(bags, oldpass, newpass))
138            goto err;
139        /* Repack bag in same form with new password */
140        if (bagnid == NID_pkcs7_data)
141            p7new = PKCS12_pack_p7data(bags);
142        else
143            p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
144                                          pbe_saltlen, pbe_iter, bags);
145        if (!p7new || !sk_PKCS7_push(newsafes, p7new))
146            goto err;
147        sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
148        bags = NULL;
149    }
150
151    /* Repack safe: save old safe in case of error */
152
153    p12_data_tmp = p12->authsafes->d.data;
154    if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
155        goto err;
156    if (!PKCS12_pack_authsafes(p12, newsafes))
157        goto err;
158    if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
159        goto err;
160    if (!ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))
161        goto err;
162
163    rv = 1;
164
165err:
166    /* Restore old safe if necessary */
167    if (rv == 1) {
168        ASN1_OCTET_STRING_free(p12_data_tmp);
169    } else if (p12_data_tmp != NULL) {
170        ASN1_OCTET_STRING_free(p12->authsafes->d.data);
171        p12->authsafes->d.data = p12_data_tmp;
172    }
173    sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
174    sk_PKCS7_pop_free(asafes, PKCS7_free);
175    sk_PKCS7_pop_free(newsafes, PKCS7_free);
176    return rv;
177}
178
179static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
180                        const char *newpass)
181{
182    int i;
183    for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
184        if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
185            return 0;
186    }
187    return 1;
188}
189
190/* Change password of safebag: only needs handle shrouded keybags */
191
192static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
193                       const char *newpass)
194{
195    PKCS8_PRIV_KEY_INFO *p8;
196    X509_SIG *p8new;
197    int p8_nid, p8_saltlen, p8_iter;
198
199    if (M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag)
200        return 1;
201
202    if (!(p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)))
203        return 0;
204    if (!alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, &p8_saltlen))
205        return 0;
206    p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
207                          p8_iter, p8);
208    PKCS8_PRIV_KEY_INFO_free(p8);
209    if (p8new == NULL)
210        return 0;
211    X509_SIG_free(bag->value.shkeybag);
212    bag->value.shkeybag = p8new;
213    return 1;
214}
215
216static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen)
217{
218    PBEPARAM *pbe;
219    const unsigned char *p;
220
221    p = alg->parameter->value.sequence->data;
222    pbe = d2i_PBEPARAM(NULL, &p, alg->parameter->value.sequence->length);
223    if (!pbe)
224        return 0;
225    *pnid = OBJ_obj2nid(alg->algorithm);
226    *piter = ASN1_INTEGER_get(pbe->iter);
227    *psaltlen = pbe->salt->length;
228    PBEPARAM_free(pbe);
229    return 1;
230}
231