crypto/pkcs12/p12_kiss.c

   1 /* p12_kiss.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <pem.h>
  63 #include <err.h>
  64 #include <x509.h>
  65 #include "pkcs12.h"
  66
  67 /* Simplified PKCS#12 routines */
  68
  69 #ifndef NOPROTO
  70 static int parse_pk12( PKCS12 *p12, unsigned char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca);
  71 static int parse_bags( STACK *bags, unsigned char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid, char *keymatch);
  72 static int parse_bag( PKCS12_SAFEBAG *bag, unsigned char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid, char *keymatch);
  73 #else
  74 static int parse_pk12();
  75 static int parse_bags();
  76 static int parse_bag();
  77 #endif
  78
  79 /* Parse and decrypt a PKCS#12 structure returning user key, user cert
  80  * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
  81  * or it should point to a valid STACK structure. pkey and cert can be
  82  * passed unitialised.
  83  */
  84
  85 int PKCS12_parse (p12, pass, pkey, cert, ca)
  86 PKCS12 *p12;
  87 char *pass;
  88 EVP_PKEY **pkey;
  89 X509 **cert;
  90 STACK **ca;
  91 {
  92
  93 /* Check for NULL PKCS12 structure */
  94
  95 if(!p12) {
  96         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  97         return 0;
  98 }
  99
 100 /* Allocate stack for ca certificates if needed */
 101 if ((ca != NULL) && (*ca == NULL)) {
 102         if (!(*ca = sk_new(NULL))) {
 103                 PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
 104                 return 0;
 105         }
 106 }
 107
 108 if(pkey) *pkey = NULL;
 109 if(cert) *cert = NULL;
 110
 111 /* Check the mac */
 112
 113 if (!PKCS12_verify_mac (p12, pass, -1)) {
 114         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 115         goto err;
 116 }
 117
 118 if (!parse_pk12 (p12, pass, -1, pkey, cert, ca)) {
 119         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
 120         goto err;
 121 }
 122
 123 return 1;
 124
 125 err:
 126
 127 if (pkey && *pkey) EVP_PKEY_free (*pkey);
 128 if (cert && *cert) X509_free (*cert);
 129 if (ca) sk_pop_free (*ca, X509_free);
 130 return 0;
 131
 132 }
 133
 134 /* Parse the outer PKCS#12 structure */
 135
 136 static int parse_pk12 (p12, pass, passlen, pkey, cert, ca)
 137 PKCS12 *p12;
 138 unsigned char *pass;
 139 int passlen;
 140 EVP_PKEY **pkey;
 141 X509 **cert;
 142 STACK **ca;
 143 {
 144         STACK *asafes, *bags;
 145         int i, bagnid;
 146         PKCS7 *p7;
 147         ASN1_OCTET_STRING *keyid = NULL;
 148         char keymatch = 0;
 149         if (!( asafes = M_PKCS12_unpack_authsafes (p12))) return 0;
 150         for (i = 0; i < sk_num (asafes); i++) {
 151                 p7 = (PKCS7 *) sk_value (asafes, i);
 152                 bagnid = OBJ_obj2nid (p7->type);
 153                 if (bagnid == NID_pkcs7_data) {
 154                         bags = M_PKCS12_unpack_p7data (p7);
 155                 } else if (bagnid == NID_pkcs7_encrypted) {
 156                         bags = M_PKCS12_unpack_p7encdata (p7, pass, passlen);
 157                 } else continue;
 158                 if (!bags) {
 159                         sk_pop_free (asafes, PKCS7_free);
 160                         return 0;
 161                 }
 162                 if (!parse_bags (bags, pass, passlen, pkey, cert, ca,
 163                                                          &keyid, &keymatch)) {
 164                         sk_pop_free (bags, PKCS12_SAFEBAG_free);
 165                         sk_pop_free (asafes, PKCS7_free);
 166                         return 0;
 167                 }
 168                 sk_pop_free (bags, PKCS12_SAFEBAG_free);
 169         }
 170         sk_pop_free (asafes, PKCS7_free);
 171         if (keyid) ASN1_OCTET_STRING_free (keyid);
 172         return 1;
 173 }
 174
 175
 176 static int parse_bags (bags, pass, passlen, pkey, cert, ca, keyid, keymatch)
 177 STACK *bags;
 178 unsigned char *pass;
 179 int passlen;
 180 EVP_PKEY **pkey;
 181 X509 **cert;
 182 STACK **ca;
 183 ASN1_OCTET_STRING **keyid;
 184 char *keymatch;
 185 {
 186         int i;
 187         for (i = 0; i < sk_num (bags); i++) {
 188                 if (!parse_bag ((PKCS12_SAFEBAG *)sk_value (bags, i),
 189                          pass, passlen, pkey, cert, ca, keyid,
 190                                                          keymatch)) return 0;
 191         }
 192         return 1;
 193 }
 194
 195 #define MATCH_KEY  0x1
 196 #define MATCH_CERT 0x2
 197 #define MATCH_ALL  0x3
 198
 199 static int parse_bag (bag, pass, passlen, pkey, cert, ca, keyid, keymatch)
 200 PKCS12_SAFEBAG *bag;
 201 unsigned char *pass;
 202 int passlen;
 203 EVP_PKEY **pkey;
 204 X509 **cert;
 205 STACK **ca;
 206 ASN1_OCTET_STRING **keyid;
 207 char *keymatch;
 208 {
 209         PKCS8_PRIV_KEY_INFO *p8;
 210         X509 *x509;
 211         ASN1_OCTET_STRING *lkey = NULL;
 212         ASN1_TYPE *attrib;
 213
 214
 215         if ((attrib = PKCS12_get_attr (bag, NID_localKeyID)))
 216                                             lkey = attrib->value.octet_string;
 217
 218         /* Check for any local key id matching (if needed) */
 219         if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) {
 220                 if (*keyid) {
 221                         if (ASN1_OCTET_STRING_cmp (*keyid, lkey)) lkey = NULL;
 222                 } else {
 223                         if (!(*keyid = ASN1_OCTET_STRING_dup (lkey))) {
 224                                 PKCS12err(PKCS12_F_PARSE_BAGS,ERR_R_MALLOC_FAILURE);
 225                                 return 0;
 226                     }
 227                 }
 228         }
 229
 230         switch (M_PKCS12_bag_type(bag))
 231         {
 232         case NID_keyBag:
 233                 if (!lkey || !pkey) return 1;
 234                 if (!(*pkey = EVP_PKCS82PKEY (bag->value.keybag))) return 0;
 235                 *keymatch |= MATCH_KEY;
 236         break;
 237
 238         case NID_pkcs8ShroudedKeyBag:
 239                 if (!lkey || !pkey) return 1;
 240                 if (!(p8 = M_PKCS12_decrypt_skey (bag, pass, passlen)))
 241                                 return 0;
 242                 *pkey = EVP_PKCS82PKEY (p8);
 243                 PKCS8_PRIV_KEY_INFO_free (p8);
 244                 if (!(*pkey)) return 0;
 245                 *keymatch |= MATCH_KEY;
 246         break;
 247
 248         case NID_certBag:
 249                 if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
 250                                                                  return 1;
 251                 if (!(x509 = M_PKCS12_certbag2x509(bag))) return 0;
 252                 if (lkey) {
 253                         *keymatch |= MATCH_CERT;
 254                         if (cert) *cert = x509;
 255                 } else if (ca) sk_push (*ca, (char *)x509);
 256         break;
 257
 258         case NID_safeContentsBag:
 259                 return parse_bags(bag->value.safes, pass, passlen,
 260                                         pkey, cert, ca, keyid, keymatch);
 261         break;
 262
 263         default:
 264                 return 1;
 265         break;
 266         }
 267         return 1;
 268 }
 269