[331] | 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <stdlib.h>
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| 12 | #include <string.h>
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| 13 | #include <openssl/pem.h>
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| 14 | #include <openssl/err.h>
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| 15 | #include <openssl/pkcs12.h>
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| 16 | #include "p12_lcl.h"
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| 17 |
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| 18 | /* PKCS#12 password change routine */
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| 19 |
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| 20 | static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass);
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| 21 | static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
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| 22 | const char *newpass);
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| 23 | static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
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| 24 | const char *newpass);
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| 25 | static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
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| 26 | int *psaltlen);
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| 27 |
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| 28 | /*
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| 29 | * Change the password on a PKCS#12 structure.
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| 30 | */
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| 31 |
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| 32 | int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass)
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| 33 | {
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| 34 | /* Check for NULL PKCS12 structure */
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| 35 |
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| 36 | if (!p12) {
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| 37 | PKCS12err(PKCS12_F_PKCS12_NEWPASS,
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| 38 | PKCS12_R_INVALID_NULL_PKCS12_POINTER);
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| 39 | return 0;
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| 40 | }
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| 41 |
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| 42 | /* Check the mac */
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| 43 |
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| 44 | if (!PKCS12_verify_mac(p12, oldpass, -1)) {
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| 45 | PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_MAC_VERIFY_FAILURE);
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| 46 | return 0;
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| 47 | }
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| 48 |
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| 49 | if (!newpass_p12(p12, oldpass, newpass)) {
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| 50 | PKCS12err(PKCS12_F_PKCS12_NEWPASS, PKCS12_R_PARSE_ERROR);
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| 51 | return 0;
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| 52 | }
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| 53 |
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| 54 | return 1;
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| 55 | }
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| 56 |
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| 57 | /* Parse the outer PKCS#12 structure */
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| 58 |
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| 59 | static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass)
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| 60 | {
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| 61 | STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
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| 62 | STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
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| 63 | int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0;
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| 64 | PKCS7 *p7, *p7new;
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| 65 | ASN1_OCTET_STRING *p12_data_tmp = NULL, *macoct = NULL;
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| 66 | unsigned char mac[EVP_MAX_MD_SIZE];
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| 67 | unsigned int maclen;
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| 68 | int rv = 0;
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| 69 |
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| 70 | if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
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| 71 | goto err;
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| 72 | if ((newsafes = sk_PKCS7_new_null()) == NULL)
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| 73 | goto err;
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| 74 | for (i = 0; i < sk_PKCS7_num(asafes); i++) {
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| 75 | p7 = sk_PKCS7_value(asafes, i);
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| 76 | bagnid = OBJ_obj2nid(p7->type);
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| 77 | if (bagnid == NID_pkcs7_data) {
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| 78 | bags = PKCS12_unpack_p7data(p7);
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| 79 | } else if (bagnid == NID_pkcs7_encrypted) {
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| 80 | bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
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| 81 | if (!alg_get(p7->d.encrypted->enc_data->algorithm,
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| 82 | &pbe_nid, &pbe_iter, &pbe_saltlen))
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| 83 | goto err;
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| 84 | } else {
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| 85 | continue;
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| 86 | }
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| 87 | if (bags == NULL)
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| 88 | goto err;
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| 89 | if (!newpass_bags(bags, oldpass, newpass))
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| 90 | goto err;
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| 91 | /* Repack bag in same form with new password */
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| 92 | if (bagnid == NID_pkcs7_data)
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| 93 | p7new = PKCS12_pack_p7data(bags);
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| 94 | else
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| 95 | p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
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| 96 | pbe_saltlen, pbe_iter, bags);
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| 97 | if (!p7new || !sk_PKCS7_push(newsafes, p7new))
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| 98 | goto err;
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| 99 | sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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| 100 | bags = NULL;
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| 101 | }
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| 102 |
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| 103 | /* Repack safe: save old safe in case of error */
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| 104 |
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| 105 | p12_data_tmp = p12->authsafes->d.data;
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| 106 | if ((p12->authsafes->d.data = ASN1_OCTET_STRING_new()) == NULL)
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| 107 | goto err;
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| 108 | if (!PKCS12_pack_authsafes(p12, newsafes))
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| 109 | goto err;
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| 110 |
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| 111 | if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
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| 112 | goto err;
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| 113 | X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
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| 114 | if (!ASN1_OCTET_STRING_set(macoct, mac, maclen))
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| 115 | goto err;
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| 116 |
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| 117 | rv = 1;
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| 118 |
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| 119 | err:
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| 120 | /* Restore old safe if necessary */
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| 121 | if (rv == 1) {
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| 122 | ASN1_OCTET_STRING_free(p12_data_tmp);
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| 123 | } else if (p12_data_tmp != NULL) {
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| 124 | ASN1_OCTET_STRING_free(p12->authsafes->d.data);
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| 125 | p12->authsafes->d.data = p12_data_tmp;
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| 126 | }
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| 127 | sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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| 128 | sk_PKCS7_pop_free(asafes, PKCS7_free);
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| 129 | sk_PKCS7_pop_free(newsafes, PKCS7_free);
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| 130 | return rv;
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| 131 | }
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| 132 |
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| 133 | static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
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| 134 | const char *newpass)
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| 135 | {
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| 136 | int i;
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| 137 | for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
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| 138 | if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass))
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| 139 | return 0;
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| 140 | }
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| 141 | return 1;
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| 142 | }
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| 143 |
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| 144 | /* Change password of safebag: only needs handle shrouded keybags */
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| 145 |
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| 146 | static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
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| 147 | const char *newpass)
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| 148 | {
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| 149 | PKCS8_PRIV_KEY_INFO *p8;
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| 150 | X509_SIG *p8new;
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| 151 | int p8_nid, p8_saltlen, p8_iter;
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| 152 | const X509_ALGOR *shalg;
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| 153 |
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| 154 | if (PKCS12_SAFEBAG_get_nid(bag) != NID_pkcs8ShroudedKeyBag)
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| 155 | return 1;
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| 156 |
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| 157 | if ((p8 = PKCS8_decrypt(bag->value.shkeybag, oldpass, -1)) == NULL)
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| 158 | return 0;
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| 159 | X509_SIG_get0(bag->value.shkeybag, &shalg, NULL);
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| 160 | if (!alg_get(shalg, &p8_nid, &p8_iter, &p8_saltlen))
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| 161 | return 0;
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| 162 | p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
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| 163 | p8_iter, p8);
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| 164 | PKCS8_PRIV_KEY_INFO_free(p8);
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| 165 | if (p8new == NULL)
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| 166 | return 0;
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| 167 | X509_SIG_free(bag->value.shkeybag);
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| 168 | bag->value.shkeybag = p8new;
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| 169 | return 1;
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| 170 | }
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| 171 |
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| 172 | static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
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| 173 | int *psaltlen)
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| 174 | {
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| 175 | PBEPARAM *pbe;
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| 176 | pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), alg->parameter);
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| 177 | if (!pbe)
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| 178 | return 0;
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| 179 | *pnid = OBJ_obj2nid(alg->algorithm);
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| 180 | *piter = ASN1_INTEGER_get(pbe->iter);
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| 181 | *psaltlen = pbe->salt->length;
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| 182 | PBEPARAM_free(pbe);
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| 183 | return 1;
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| 184 | }
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