1 /*
2 * Copyright 1999-2024 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 OSSL_LIB_CTX *libctx, const char *propq);
24 static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
25 const char *newpass,
26 OSSL_LIB_CTX *libctx, const char *propq);
27 static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
28 int *psaltlen, int *cipherid);
29
30 /*
31 * Change the password on a PKCS#12 structure.
32 */
33
PKCS12_newpass(PKCS12 * p12,const char * oldpass,const char * newpass)34 int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass)
35 {
36 /* Check for NULL PKCS12 structure */
37
38 if (p12 == NULL) {
39 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_INVALID_NULL_PKCS12_POINTER);
40 return 0;
41 }
42
43 /* Check the mac */
44 if (p12->mac != NULL) {
45 if (!PKCS12_verify_mac(p12, oldpass, -1)) {
46 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_VERIFY_FAILURE);
47 return 0;
48 }
49 }
50 if (!newpass_p12(p12, oldpass, newpass)) {
51 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_PARSE_ERROR);
52 return 0;
53 }
54
55 return 1;
56 }
57
58 /* Parse the outer PKCS#12 structure */
59
newpass_p12(PKCS12 * p12,const char * oldpass,const char * newpass)60 static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass)
61 {
62 STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
63 STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
64 int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0, cipherid = NID_undef;
65 PKCS7 *p7, *p7new;
66 ASN1_OCTET_STRING *p12_data_tmp = NULL, *macoct = NULL;
67 unsigned char mac[EVP_MAX_MD_SIZE];
68 unsigned int maclen;
69 int rv = 0;
70
71 if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
72 goto err;
73 if ((newsafes = sk_PKCS7_new_null()) == NULL)
74 goto err;
75 for (i = 0; i < sk_PKCS7_num(asafes); i++) {
76 p7 = sk_PKCS7_value(asafes, i);
77
78 bagnid = OBJ_obj2nid(p7->type);
79 if (bagnid == NID_pkcs7_data) {
80 bags = PKCS12_unpack_p7data(p7);
81 } else if (bagnid == NID_pkcs7_encrypted) {
82 bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
83 if (p7->d.encrypted == NULL
84 || !alg_get(p7->d.encrypted->enc_data->algorithm,
85 &pbe_nid, &pbe_iter, &pbe_saltlen, &cipherid))
86 goto err;
87 } else {
88 continue;
89 }
90 if (bags == NULL)
91 goto err;
92 if (!newpass_bags(bags, oldpass, newpass,
93 p7->ctx.libctx, p7->ctx.propq))
94 goto err;
95 /* Repack bag in same form with new password */
96 if (bagnid == NID_pkcs7_data)
97 p7new = PKCS12_pack_p7data(bags);
98 else
99 p7new = PKCS12_pack_p7encdata_ex(pbe_nid, newpass, -1, NULL,
100 pbe_saltlen, pbe_iter, bags,
101 p7->ctx.libctx, p7->ctx.propq);
102 if (p7new == NULL || !sk_PKCS7_push(newsafes, p7new))
103 goto err;
104 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
105 bags = NULL;
106 }
107
108 /* Repack safe: save old safe in case of error */
109
110 p12_data_tmp = p12->authsafes->d.data;
111 if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
112 goto err;
113 if (!PKCS12_pack_authsafes(p12, newsafes))
114 goto err;
115
116 if (p12->mac != NULL) {
117 if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
118 goto err;
119 X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
120 if (!ASN1_OCTET_STRING_set(macoct, mac, maclen))
121 goto err;
122 }
123
124 rv = 1;
125
126 err:
127 /* Restore old safe if necessary */
128 if (rv == 1) {
129 ASN1_OCTET_STRING_free(p12_data_tmp);
130 } else if (p12_data_tmp != NULL) {
131 ASN1_OCTET_STRING_free(p12->authsafes->d.data);
132 p12->authsafes->d.data = p12_data_tmp;
133 }
134 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
135 sk_PKCS7_pop_free(asafes, PKCS7_free);
136 sk_PKCS7_pop_free(newsafes, PKCS7_free);
137 return rv;
138 }
139
newpass_bags(STACK_OF (PKCS12_SAFEBAG)* bags,const char * oldpass,const char * newpass,OSSL_LIB_CTX * libctx,const char * propq)140 static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
141 const char *newpass,
142 OSSL_LIB_CTX *libctx, const char *propq)
143 {
144 int i;
145 for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
146 if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass,
147 libctx, propq))
148 return 0;
149 }
150 return 1;
151 }
152
153 /* Change password of safebag: only needs handle shrouded keybags */
154
newpass_bag(PKCS12_SAFEBAG * bag,const char * oldpass,const char * newpass,OSSL_LIB_CTX * libctx,const char * propq)155 static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
156 const char *newpass,
157 OSSL_LIB_CTX *libctx, const char *propq)
158 {
159 EVP_CIPHER *cipher = NULL;
160 PKCS8_PRIV_KEY_INFO *p8;
161 X509_SIG *p8new;
162 int p8_nid, p8_saltlen, p8_iter, cipherid = 0;
163 const X509_ALGOR *shalg;
164
165 if (PKCS12_SAFEBAG_get_nid(bag) != NID_pkcs8ShroudedKeyBag)
166 return 1;
167
168 if ((p8 = PKCS8_decrypt_ex(bag->value.shkeybag, oldpass, -1,
169 libctx, propq)) == NULL)
170 return 0;
171 X509_SIG_get0(bag->value.shkeybag, &shalg, NULL);
172 if (!alg_get(shalg, &p8_nid, &p8_iter, &p8_saltlen, &cipherid)) {
173 PKCS8_PRIV_KEY_INFO_free(p8);
174 return 0;
175 }
176 if (cipherid != NID_undef) {
177 cipher = EVP_CIPHER_fetch(libctx, OBJ_nid2sn(cipherid), propq);
178 if (cipher == NULL) {
179 PKCS8_PRIV_KEY_INFO_free(p8);
180 return 0;
181 }
182 }
183 p8new = PKCS8_encrypt_ex(p8_nid, cipher, newpass, -1, NULL, p8_saltlen,
184 p8_iter, p8, libctx, propq);
185 PKCS8_PRIV_KEY_INFO_free(p8);
186 EVP_CIPHER_free(cipher);
187 if (p8new == NULL)
188 return 0;
189 X509_SIG_free(bag->value.shkeybag);
190 bag->value.shkeybag = p8new;
191 return 1;
192 }
193
alg_get(const X509_ALGOR * alg,int * pnid,int * piter,int * psaltlen,int * cipherid)194 static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
195 int *psaltlen, int *cipherid)
196 {
197 int ret = 0, pbenid, aparamtype;
198 int encnid, prfnid;
199 const ASN1_OBJECT *aoid;
200 const void *aparam;
201 PBEPARAM *pbe = NULL;
202 PBE2PARAM *pbe2 = NULL;
203 PBKDF2PARAM *kdf = NULL;
204
205 X509_ALGOR_get0(&aoid, &aparamtype, &aparam, alg);
206 pbenid = OBJ_obj2nid(aoid);
207
208 switch (pbenid) {
209 case NID_pbes2:
210 if (aparamtype == V_ASN1_SEQUENCE)
211 pbe2 = ASN1_item_unpack(aparam, ASN1_ITEM_rptr(PBE2PARAM));
212 if (pbe2 == NULL)
213 goto done;
214
215 X509_ALGOR_get0(NULL, &aparamtype, &aparam, pbe2->keyfunc);
216 X509_ALGOR_get0(&aoid, NULL, NULL, pbe2->encryption);
217 encnid = OBJ_obj2nid(aoid);
218
219 if (aparamtype == V_ASN1_SEQUENCE)
220 kdf = ASN1_item_unpack(aparam, ASN1_ITEM_rptr(PBKDF2PARAM));
221 if (kdf == NULL)
222 goto done;
223
224 /* Only OCTET_STRING is supported */
225 if (kdf->salt->type != V_ASN1_OCTET_STRING)
226 goto done;
227
228 if (kdf->prf == NULL) {
229 prfnid = NID_hmacWithSHA1;
230 } else {
231 X509_ALGOR_get0(&aoid, NULL, NULL, kdf->prf);
232 prfnid = OBJ_obj2nid(aoid);
233 }
234 *psaltlen = kdf->salt->value.octet_string->length;
235 *piter = ASN1_INTEGER_get(kdf->iter);
236 *pnid = prfnid;
237 *cipherid = encnid;
238 break;
239 default:
240 pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), alg->parameter);
241 if (pbe == NULL)
242 goto done;
243 *pnid = OBJ_obj2nid(alg->algorithm);
244 *piter = ASN1_INTEGER_get(pbe->iter);
245 *psaltlen = pbe->salt->length;
246 *cipherid = NID_undef;
247 ret = 1;
248 break;
249 }
250 ret = 1;
251 done:
252 if (kdf != NULL)
253 PBKDF2PARAM_free(kdf);
254 if (pbe2 != NULL)
255 PBE2PARAM_free(pbe2);
256 if (pbe != NULL)
257 PBEPARAM_free(pbe);
258 return ret;
259 }
260
