1 /*
2 * Copyright 1999-2020 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
20 static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass);
21 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
22 const char *newpass);
23 static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
24 const char *newpass);
25 static 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
PKCS12_newpass(PKCS12 * p12,const char * oldpass,const char * newpass)32 int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass)
33 {
34 /* Check for NULL PKCS12 structure */
35
36 if (p12 == NULL) {
37 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_INVALID_NULL_PKCS12_POINTER);
38 return 0;
39 }
40
41 /* Check the mac */
42
43 if (!PKCS12_verify_mac(p12, oldpass, -1)) {
44 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_VERIFY_FAILURE);
45 return 0;
46 }
47
48 if (!newpass_p12(p12, oldpass, newpass)) {
49 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR);
50 return 0;
51 }
52
53 return 1;
54 }
55
56 /* Parse the outer PKCS#12 structure */
57
newpass_p12(PKCS12 * p12,const char * oldpass,const char * newpass)58 static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass)
59 {
60 STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
61 STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
62 int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0;
63 PKCS7 *p7, *p7new;
64 ASN1_OCTET_STRING *p12_data_tmp = NULL, *macoct = NULL;
65 unsigned char mac[EVP_MAX_MD_SIZE];
66 unsigned int maclen;
67 int rv = 0;
68
69 if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
70 goto err;
71 if ((newsafes = sk_PKCS7_new_null()) == NULL)
72 goto err;
73 for (i = 0; i < sk_PKCS7_num(asafes); i++) {
74 p7 = sk_PKCS7_value(asafes, i);
75 bagnid = OBJ_obj2nid(p7->type);
76 if (bagnid == NID_pkcs7_data) {
77 bags = PKCS12_unpack_p7data(p7);
78 } else if (bagnid == NID_pkcs7_encrypted) {
79 bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
80 if (!alg_get(p7->d.encrypted->enc_data->algorithm,
81 &pbe_nid, &pbe_iter, &pbe_saltlen))
82 goto err;
83 } else {
84 continue;
85 }
86 if (bags == NULL)
87 goto err;
88 if (!newpass_bags(bags, oldpass, newpass))
89 goto err;
90 /* Repack bag in same form with new password */
91 if (bagnid == NID_pkcs7_data)
92 p7new = PKCS12_pack_p7data(bags);
93 else
94 p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
95 pbe_saltlen, pbe_iter, bags);
96 if (p7new == NULL || !sk_PKCS7_push(newsafes, p7new))
97 goto err;
98 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
99 bags = NULL;
100 }
101
102 /* Repack safe: save old safe in case of error */
103
104 p12_data_tmp = p12->authsafes->d.data;
105 if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
106 goto err;
107 if (!PKCS12_pack_authsafes(p12, newsafes))
108 goto err;
109
110 if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
111 goto err;
112 X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
113 if (!ASN1_OCTET_STRING_set(macoct, mac, maclen))
114 goto err;
115
116 rv = 1;
117
118 err:
119 /* Restore old safe if necessary */
120 if (rv == 1) {
121 ASN1_OCTET_STRING_free(p12_data_tmp);
122 } else if (p12_data_tmp != NULL) {
123 ASN1_OCTET_STRING_free(p12->authsafes->d.data);
124 p12->authsafes->d.data = p12_data_tmp;
125 }
126 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
127 sk_PKCS7_pop_free(asafes, PKCS7_free);
128 sk_PKCS7_pop_free(newsafes, PKCS7_free);
129 return rv;
130 }
131
newpass_bags(STACK_OF (PKCS12_SAFEBAG)* bags,const char * oldpass,const char * newpass)132 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
133 const char *newpass)
134 {
135 int i;
136 for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
137 if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
138 return 0;
139 }
140 return 1;
141 }
142
143 /* Change password of safebag: only needs handle shrouded keybags */
144
newpass_bag(PKCS12_SAFEBAG * bag,const char * oldpass,const char * newpass)145 static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
146 const char *newpass)
147 {
148 PKCS8_PRIV_KEY_INFO *p8;
149 X509_SIG *p8new;
150 int p8_nid, p8_saltlen, p8_iter;
151 const X509_ALGOR *shalg;
152
153 if (PKCS12_SAFEBAG_get_nid(bag) != NID_pkcs8ShroudedKeyBag)
154 return 1;
155
156 if ((p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)) == NULL)
157 return 0;
158 X509_SIG_get0(bag->value.shkeybag, &shalg, NULL);
159 if (!alg_get(shalg, &p8_nid, &p8_iter, &p8_saltlen)) {
160 PKCS8_PRIV_KEY_INFO_free(p8);
161 return 0;
162 }
163 p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
164 p8_iter, p8);
165 PKCS8_PRIV_KEY_INFO_free(p8);
166 if (p8new == NULL)
167 return 0;
168 X509_SIG_free(bag->value.shkeybag);
169 bag->value.shkeybag = p8new;
170 return 1;
171 }
172
alg_get(const X509_ALGOR * alg,int * pnid,int * piter,int * psaltlen)173 static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
174 int *psaltlen)
175 {
176 PBEPARAM *pbe;
177
178 pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), alg->parameter);
179 if (pbe == NULL)
180 return 0;
181 *pnid = OBJ_obj2nid(alg->algorithm);
182 *piter = ASN1_INTEGER_get(pbe->iter);
183 *psaltlen = pbe->salt->length;
184 PBEPARAM_free(pbe);
185 return 1;
186 }
187
