crypto/pkcs12/p12_crt.c

   1 /*
   2  * Copyright 1999-2021 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 "internal/cryptlib.h"
  12 #include <openssl/pkcs12.h>
  13 #include "p12_local.h"
  14
  15 static int pkcs12_add_bag(STACK_OF(PKCS12_SAFEBAG) **pbags,
  16                           PKCS12_SAFEBAG *bag);
  17
  18 static int copy_bag_attr(PKCS12_SAFEBAG *bag, EVP_PKEY *pkey, int nid)
  19 {
  20     int idx;
  21     X509_ATTRIBUTE *attr;
  22     idx = EVP_PKEY_get_attr_by_NID(pkey, nid, -1);
  23     if (idx < 0)
  24         return 1;
  25     attr = EVP_PKEY_get_attr(pkey, idx);
  26     if (!X509at_add1_attr(&bag->attrib, attr))
  27         return 0;
  28     return 1;
  29 }
  30
  31 PKCS12 *PKCS12_create(const char *pass, const char *name, EVP_PKEY *pkey, X509 *cert,
  32                       STACK_OF(X509) *ca, int nid_key, int nid_cert, int iter,
  33                       int mac_iter, int keytype)
  34 {
  35     PKCS12 *p12 = NULL;
  36     STACK_OF(PKCS7) *safes = NULL;
  37     STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
  38     PKCS12_SAFEBAG *bag = NULL;
  39     int i;
  40     unsigned char keyid[EVP_MAX_MD_SIZE];
  41     unsigned int keyidlen = 0;
  42
  43     /* Set defaults */
  44     if (nid_cert == NID_undef)
  45         nid_cert = NID_aes_256_cbc;
  46     if (nid_key == NID_undef)
  47         nid_key = NID_aes_256_cbc;
  48     if (!iter)
  49         iter = PKCS12_DEFAULT_ITER;
  50     if (!mac_iter)
  51         mac_iter = PKCS12_DEFAULT_ITER;
  52
  53     if (pkey == NULL && cert == NULL && ca == NULL) {
  54         ERR_raise(ERR_LIB_PKCS12, PKCS12_R_INVALID_NULL_ARGUMENT);
  55         return NULL;
  56     }
  57
  58     if (pkey && cert) {
  59         if (!X509_check_private_key(cert, pkey))
  60             return NULL;
  61         if (!X509_digest(cert, EVP_sha1(), keyid, &keyidlen))
  62             return NULL;
  63     }
  64
  65     if (cert) {
  66         bag = PKCS12_add_cert(&bags, cert);
  67         if (name && !PKCS12_add_friendlyname(bag, name, -1))
  68             goto err;
  69         if (keyidlen && !PKCS12_add_localkeyid(bag, keyid, keyidlen))
  70             goto err;
  71     }
  72
  73     /* Add all other certificates */
  74     for (i = 0; i < sk_X509_num(ca); i++) {
  75         if (!PKCS12_add_cert(&bags, sk_X509_value(ca, i)))
  76             goto err;
  77     }
  78
  79     if (bags && !PKCS12_add_safe(&safes, bags, nid_cert, iter, pass))
  80         goto err;
  81
  82     sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
  83     bags = NULL;
  84
  85     if (pkey) {
  86         bag = PKCS12_add_key(&bags, pkey, keytype, iter, nid_key, pass);
  87
  88         if (!bag)
  89             goto err;
  90
  91         if (!copy_bag_attr(bag, pkey, NID_ms_csp_name))
  92             goto err;
  93         if (!copy_bag_attr(bag, pkey, NID_LocalKeySet))
  94             goto err;
  95
  96         if (name && !PKCS12_add_friendlyname(bag, name, -1))
  97             goto err;
  98         if (keyidlen && !PKCS12_add_localkeyid(bag, keyid, keyidlen))
  99             goto err;
 100     }
 101
 102     if (bags && !PKCS12_add_safe(&safes, bags, -1, 0, NULL))
 103         goto err;
 104
 105     sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 106     bags = NULL;
 107
 108     p12 = PKCS12_add_safes(safes, 0);
 109
 110     if (p12 == NULL)
 111         goto err;
 112
 113     sk_PKCS7_pop_free(safes, PKCS7_free);
 114
 115     safes = NULL;
 116
 117     if ((mac_iter != -1) &&
 118         !PKCS12_set_mac(p12, pass, -1, NULL, 0, mac_iter, NULL))
 119         goto err;
 120
 121     return p12;
 122
 123  err:
 124     PKCS12_free(p12);
 125     sk_PKCS7_pop_free(safes, PKCS7_free);
 126     sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 127     return NULL;
 128
 129 }
 130
 131 PKCS12_SAFEBAG *PKCS12_add_cert(STACK_OF(PKCS12_SAFEBAG) **pbags, X509 *cert)
 132 {
 133     PKCS12_SAFEBAG *bag = NULL;
 134     char *name;
 135     int namelen = -1;
 136     unsigned char *keyid;
 137     int keyidlen = -1;
 138
 139     /* Add user certificate */
 140     if ((bag = PKCS12_SAFEBAG_create_cert(cert)) == NULL)
 141         goto err;
 142
 143     /*
 144      * Use friendlyName and localKeyID in certificate. (if present)
 145      */
 146
 147     name = (char *)X509_alias_get0(cert, &namelen);
 148
 149     if (name && !PKCS12_add_friendlyname(bag, name, namelen))
 150         goto err;
 151
 152     keyid = X509_keyid_get0(cert, &keyidlen);
 153
 154     if (keyid && !PKCS12_add_localkeyid(bag, keyid, keyidlen))
 155         goto err;
 156
 157     if (!pkcs12_add_bag(pbags, bag))
 158         goto err;
 159
 160     return bag;
 161
 162  err:
 163     PKCS12_SAFEBAG_free(bag);
 164     return NULL;
 165
 166 }
 167
 168 PKCS12_SAFEBAG *PKCS12_add_key(STACK_OF(PKCS12_SAFEBAG) **pbags,
 169                                EVP_PKEY *key, int key_usage, int iter,
 170                                int nid_key, const char *pass)
 171 {
 172
 173     PKCS12_SAFEBAG *bag = NULL;
 174     PKCS8_PRIV_KEY_INFO *p8 = NULL;
 175
 176     /* Make a PKCS#8 structure */
 177     if ((p8 = EVP_PKEY2PKCS8(key)) == NULL)
 178         goto err;
 179     if (key_usage && !PKCS8_add_keyusage(p8, key_usage))
 180         goto err;
 181     if (nid_key != -1) {
 182         bag = PKCS12_SAFEBAG_create_pkcs8_encrypt(nid_key, pass, -1, NULL, 0,
 183                                                   iter, p8);
 184         PKCS8_PRIV_KEY_INFO_free(p8);
 185     } else
 186         bag = PKCS12_SAFEBAG_create0_p8inf(p8);
 187
 188     if (!bag)
 189         goto err;
 190
 191     if (!pkcs12_add_bag(pbags, bag))
 192         goto err;
 193
 194     return bag;
 195
 196  err:
 197     PKCS12_SAFEBAG_free(bag);
 198     return NULL;
 199
 200 }
 201
 202 PKCS12_SAFEBAG *PKCS12_add_secret(STACK_OF(PKCS12_SAFEBAG) **pbags,
 203                                   int nid_type, const unsigned char *value, int len)
 204 {
 205     PKCS12_SAFEBAG *bag = NULL;
 206
 207     /* Add secret, storing the value as an octet string */
 208     if ((bag = PKCS12_SAFEBAG_create_secret(nid_type, V_ASN1_OCTET_STRING, value, len)) == NULL)
 209         goto err;
 210
 211     if (!pkcs12_add_bag(pbags, bag))
 212         goto err;
 213
 214     return bag;
 215  err:
 216     PKCS12_SAFEBAG_free(bag);
 217     return NULL;
 218 }
 219
 220 int PKCS12_add_safe(STACK_OF(PKCS7) **psafes, STACK_OF(PKCS12_SAFEBAG) *bags,
 221                     int nid_safe, int iter, const char *pass)
 222 {
 223     PKCS7 *p7 = NULL;
 224     int free_safes = 0;
 225
 226     if (*psafes == NULL) {
 227         *psafes = sk_PKCS7_new_null();
 228         if (*psafes == NULL)
 229             return 0;
 230         free_safes = 1;
 231     }
 232
 233     if (nid_safe == 0)
 234 #ifdef OPENSSL_NO_RC2
 235         nid_safe = NID_pbe_WithSHA1And3_Key_TripleDES_CBC;
 236 #else
 237         nid_safe = NID_pbe_WithSHA1And40BitRC2_CBC;
 238 #endif
 239
 240     if (nid_safe == -1)
 241         p7 = PKCS12_pack_p7data(bags);
 242     else
 243         p7 = PKCS12_pack_p7encdata(nid_safe, pass, -1, NULL, 0, iter, bags);
 244     if (p7 == NULL)
 245         goto err;
 246
 247     if (!sk_PKCS7_push(*psafes, p7))
 248         goto err;
 249
 250     return 1;
 251
 252  err:
 253     if (free_safes) {
 254         sk_PKCS7_free(*psafes);
 255         *psafes = NULL;
 256     }
 257     PKCS7_free(p7);
 258     return 0;
 259
 260 }
 261
 262 static int pkcs12_add_bag(STACK_OF(PKCS12_SAFEBAG) **pbags,
 263                           PKCS12_SAFEBAG *bag)
 264 {
 265     int free_bags = 0;
 266
 267     if (pbags == NULL)
 268         return 1;
 269     if (*pbags == NULL) {
 270         *pbags = sk_PKCS12_SAFEBAG_new_null();
 271         if (*pbags == NULL)
 272             return 0;
 273         free_bags = 1;
 274     }
 275
 276     if (!sk_PKCS12_SAFEBAG_push(*pbags, bag)) {
 277         if (free_bags) {
 278             sk_PKCS12_SAFEBAG_free(*pbags);
 279             *pbags = NULL;
 280         }
 281         return 0;
 282     }
 283
 284     return 1;
 285
 286 }
 287
 288 PKCS12 *PKCS12_add_safes(STACK_OF(PKCS7) *safes, int nid_p7)
 289 {
 290     PKCS12 *p12;
 291
 292     if (nid_p7 <= 0)
 293         nid_p7 = NID_pkcs7_data;
 294     p12 = PKCS12_init(nid_p7);
 295     if (p12 == NULL)
 296         return NULL;
 297
 298     if (!PKCS12_pack_authsafes(p12, safes)) {
 299         PKCS12_free(p12);
 300         return NULL;
 301     }
 302
 303     return p12;
 304
 305 }