2 * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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
11 * HMAC low level APIs are deprecated for public use, but still ok for internal
14 #include "internal/deprecated.h"
17 #include "internal/cryptlib.h"
18 #include <openssl/crypto.h>
19 #include <openssl/hmac.h>
20 #include <openssl/rand.h>
21 #include <openssl/pkcs12.h>
22 #include "p12_local.h"
24 int PKCS12_mac_present(const PKCS12 *p12)
26 return p12->mac ? 1 : 0;
29 void PKCS12_get0_mac(const ASN1_OCTET_STRING **pmac,
30 const X509_ALGOR **pmacalg,
31 const ASN1_OCTET_STRING **psalt,
32 const ASN1_INTEGER **piter,
36 X509_SIG_get0(p12->mac->dinfo, pmacalg, pmac);
38 *psalt = p12->mac->salt;
40 *piter = p12->mac->iter;
53 #define TK26_MAC_KEY_LEN 32
55 static int pkcs12_gen_gost_mac_key(const char *pass, int passlen,
56 const unsigned char *salt, int saltlen,
57 int iter, int keylen, unsigned char *key,
60 unsigned char out[96];
62 if (keylen != TK26_MAC_KEY_LEN) {
66 if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
67 digest, sizeof(out), out)) {
70 memcpy(key, out + sizeof(out) - TK26_MAC_KEY_LEN, TK26_MAC_KEY_LEN);
71 OPENSSL_cleanse(out, sizeof(out));
76 static int pkcs12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
77 unsigned char *mac, unsigned int *maclen,
78 int (*pkcs12_key_gen)(const char *pass, int passlen,
79 unsigned char *salt, int slen,
80 int id, int iter, int n,
82 const EVP_MD *md_type))
87 HMAC_CTX *hmac = NULL;
88 unsigned char key[EVP_MAX_MD_SIZE], *salt;
93 const X509_ALGOR *macalg;
94 const ASN1_OBJECT *macoid;
96 if (!PKCS7_type_is_data(p12->authsafes)) {
97 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_CONTENT_TYPE_NOT_DATA);
101 salt = p12->mac->salt->data;
102 saltlen = p12->mac->salt->length;
103 if (p12->mac->iter == NULL)
106 iter = ASN1_INTEGER_get(p12->mac->iter);
107 X509_SIG_get0(p12->mac->dinfo, &macalg, NULL);
108 X509_ALGOR_get0(&macoid, NULL, NULL, macalg);
109 if (OBJ_obj2txt(md_name, sizeof(md_name), macoid, 0) < 0)
111 md = md_fetch = EVP_MD_fetch(p12->authsafes->ctx.libctx, md_name,
112 p12->authsafes->ctx.propq);
114 md = EVP_get_digestbynid(OBJ_obj2nid(macoid));
117 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
120 md_size = EVP_MD_size(md);
121 md_nid = EVP_MD_type(md);
124 if ((md_nid == NID_id_GostR3411_94
125 || md_nid == NID_id_GostR3411_2012_256
126 || md_nid == NID_id_GostR3411_2012_512)
127 && ossl_safe_getenv("LEGACY_GOST_PKCS12") == NULL) {
128 md_size = TK26_MAC_KEY_LEN;
129 if (!pkcs12_gen_gost_mac_key(pass, passlen, salt, saltlen, iter,
131 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
135 if (pkcs12_key_gen != NULL) {
136 if (!(*pkcs12_key_gen)(pass, passlen, salt, saltlen, PKCS12_MAC_ID,
137 iter, md_size, key, md)) {
138 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
142 /* Default to UTF-8 password */
143 if (!PKCS12_key_gen_utf8_ex(pass, passlen, salt, saltlen, PKCS12_MAC_ID,
144 iter, md_size, key, md,
145 p12->authsafes->ctx.libctx,
146 p12->authsafes->ctx.propq)) {
147 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_KEY_GEN_ERROR);
152 if ((hmac = HMAC_CTX_new()) == NULL
153 || !HMAC_Init_ex(hmac, key, md_size, md, NULL)
154 || !HMAC_Update(hmac, p12->authsafes->d.data->data,
155 p12->authsafes->d.data->length)
156 || !HMAC_Final(hmac, mac, maclen)) {
162 OPENSSL_cleanse(key, sizeof(key));
164 EVP_MD_free(md_fetch);
168 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
169 unsigned char *mac, unsigned int *maclen)
171 return pkcs12_gen_mac(p12, pass, passlen, mac, maclen, NULL);
175 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
177 unsigned char mac[EVP_MAX_MD_SIZE];
179 const ASN1_OCTET_STRING *macoct;
181 if (p12->mac == NULL) {
182 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_ABSENT);
185 if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, NULL)) {
186 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
189 X509_SIG_get0(p12->mac->dinfo, NULL, &macoct);
190 if ((maclen != (unsigned int)ASN1_STRING_length(macoct))
191 || CRYPTO_memcmp(mac, ASN1_STRING_get0_data(macoct), maclen) != 0)
199 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
200 unsigned char *salt, int saltlen, int iter,
201 const EVP_MD *md_type)
203 unsigned char mac[EVP_MAX_MD_SIZE];
205 ASN1_OCTET_STRING *macoct;
208 /* No need to do a fetch as the md_type is used only to get a NID */
209 md_type = EVP_sha256();
211 iter = PKCS12_DEFAULT_ITER;
212 if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
213 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_SETUP_ERROR);
217 * Note that output mac is forced to UTF-8...
219 if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, NULL)) {
220 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_GENERATION_ERROR);
223 X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
224 if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) {
225 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_STRING_SET_ERROR);
231 /* Set up a mac structure */
232 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
233 const EVP_MD *md_type)
237 PKCS12_MAC_DATA_free(p12->mac);
240 if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL)
243 if ((p12->mac->iter = ASN1_INTEGER_new()) == NULL) {
244 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
247 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
248 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
253 saltlen = PKCS12_SALT_LEN;
256 if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL) {
257 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
260 p12->mac->salt->length = saltlen;
262 if (RAND_bytes_ex(p12->authsafes->ctx.libctx, p12->mac->salt->data,
266 memcpy(p12->mac->salt->data, salt, saltlen);
267 X509_SIG_getm(p12->mac->dinfo, &macalg, NULL);
268 if (!X509_ALGOR_set0(macalg, OBJ_nid2obj(EVP_MD_type(md_type)),
269 V_ASN1_NULL, NULL)) {
270 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);