1/*
2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include <openssl/pem.h>
14#include <openssl/err.h>
15#include <openssl/pkcs12.h>
16#include "p12_local.h"
17
18/* PKCS#12 password change routine */
19
20static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass);
21static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
22 const char *newpass);
23static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
24 const char *newpass);
25static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
26 int *psaltlen);
27
28/*
29 * Change the password on a PKCS#12 structure.
30 */
31
32int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass)
33{
34 /* Check for NULL PKCS12 structure */
35
36 if (p12 == NULL) {
37 PKCS12err(PKCS12_F_PKCS12_NEWPASS,
38 PKCS12_R_INVALID_NULL_PKCS12_POINTER);
39 return 0;
40 }
41
42 /* Check the mac */
43
44 if (!PKCS12_verify_mac(p12, oldpass, -1)) {
45 PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_MAC_VERIFY_FAILURE);
46 return 0;
47 }
48
49 if (!newpass_p12(p12, oldpass, newpass)) {
50 PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_PARSE_ERROR);
51 return 0;
52 }
53
54 return 1;
55}
56
57/* Parse the outer PKCS#12 structure */
58
59static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass)
60{
61 STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
62 STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
63 int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0;
64 PKCS7 *p7, *p7new;
65 ASN1_OCTET_STRING *p12_data_tmp = NULL, *macoct = NULL;
66 unsigned char mac[EVP_MAX_MD_SIZE];
67 unsigned int maclen;
68 int rv = 0;
69
70 if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
71 goto err;
72 if ((newsafes = sk_PKCS7_new_null()) == NULL)
73 goto err;
74 for (i = 0; i < sk_PKCS7_num(asafes); i++) {
75 p7 = sk_PKCS7_value(asafes, i);
76 bagnid = OBJ_obj2nid(p7->type);
77 if (bagnid == NID_pkcs7_data) {
78 bags = PKCS12_unpack_p7data(p7);
79 } else if (bagnid == NID_pkcs7_encrypted) {
80 bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
81 if (!alg_get(p7->d.encrypted->enc_data->algorithm,
82 &pbe_nid, &pbe_iter, &pbe_saltlen))
83 goto err;
84 } else {
85 continue;
86 }
87 if (bags == NULL)
88 goto err;
89 if (!newpass_bags(bags, oldpass, newpass))
90 goto err;
91 /* Repack bag in same form with new password */
92 if (bagnid == NID_pkcs7_data)
93 p7new = PKCS12_pack_p7data(bags);
94 else
95 p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
96 pbe_saltlen, pbe_iter, bags);
97 if (p7new == NULL || !sk_PKCS7_push(newsafes, p7new))
98 goto err;
99 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
100 bags = NULL;
101 }
102
103 /* Repack safe: save old safe in case of error */
104
105 p12_data_tmp = p12->authsafes->d.data;
106 if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
107 goto err;
108 if (!PKCS12_pack_authsafes(p12, newsafes))
109 goto err;
110
111 if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
112 goto err;
113 X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
114 if (!ASN1_OCTET_STRING_set(macoct, mac, maclen))
115 goto err;
116
117 rv = 1;
118
119err:
120 /* Restore old safe if necessary */
121 if (rv == 1) {
122 ASN1_OCTET_STRING_free(p12_data_tmp);
123 } else if (p12_data_tmp != NULL) {
124 ASN1_OCTET_STRING_free(p12->authsafes->d.data);
125 p12->authsafes->d.data = p12_data_tmp;
126 }
127 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
128 sk_PKCS7_pop_free(asafes, PKCS7_free);
129 sk_PKCS7_pop_free(newsafes, PKCS7_free);
130 return rv;
131}
132
133static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
134 const char *newpass)
135{
136 int i;
137 for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
138 if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
139 return 0;
140 }
141 return 1;
142}
143
144/* Change password of safebag: only needs handle shrouded keybags */
145
146static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
147 const char *newpass)
148{
149 PKCS8_PRIV_KEY_INFO *p8;
150 X509_SIG *p8new;
151 int p8_nid, p8_saltlen, p8_iter;
152 const X509_ALGOR *shalg;
153
154 if (PKCS12_SAFEBAG_get_nid(bag) != NID_pkcs8ShroudedKeyBag)
155 return 1;
156
157 if ((p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)) == NULL)
158 return 0;
159 X509_SIG_get0(bag->value.shkeybag, &shalg, NULL);
160 if (!alg_get(shalg, &p8_nid, &p8_iter, &p8_saltlen))
161 return 0;
162 p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
163 p8_iter, p8);
164 PKCS8_PRIV_KEY_INFO_free(p8);
165 if (p8new == NULL)
166 return 0;
167 X509_SIG_free(bag->value.shkeybag);
168 bag->value.shkeybag = p8new;
169 return 1;
170}
171
172static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
173 int *psaltlen)
174{
175 PBEPARAM *pbe;
176
177 pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), alg->parameter);
178 if (pbe == NULL)
179 return 0;
180 *pnid = OBJ_obj2nid(alg->algorithm);
181 *piter = ASN1_INTEGER_get(pbe->iter);
182 *psaltlen = pbe->salt->length;
183 PBEPARAM_free(pbe);
184 return 1;
185}
186