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 "cryptlib.h"
  61 #include "pkcs12.h"
  62
  63 /* Simplified PKCS#12 routines */
  64
  65 #ifndef NOPROTO
  66 static int parse_pk12( PKCS12 *p12, unsigned char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca);
  67 static int parse_bags( STACK *bags, unsigned char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid, char *keymatch);
  68 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);
  69 #else
  70 static int parse_pk12();
  71 static int parse_bags();
  72 static int parse_bag();
  73 #endif
  74
  75 /* Parse and decrypt a PKCS#12 structure returning user key, user cert
  76  * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
  77  * or it should point to a valid STACK structure. pkey and cert can be
  78  * passed unitialised.
  79  */
  80
  81 int PKCS12_parse (PKCS12 *p12, char *pass, EVP_PKEY **pkey, X509 **cert,
  82              STACK **ca)
  83 {
  84
  85 /* Check for NULL PKCS12 structure */
  86
  87 if(!p12) {
  88         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  89         return 0;
  90 }
  91
  92 /* Allocate stack for ca certificates if needed */
  93 if ((ca != NULL) && (*ca == NULL)) {
  94         if (!(*ca = sk_new(NULL))) {
  95                 PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
  96                 return 0;
  97         }
  98 }
  99
 100 if(pkey) *pkey = NULL;
 101 if(cert) *cert = NULL;
 102
 103 /* Check the mac */
 104
 105 if (!PKCS12_verify_mac (p12, pass, -1)) {
 106         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 107         goto err;
 108 }
 109
 110 if (!parse_pk12 (p12, pass, -1, pkey, cert, ca)) {
 111         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
 112         goto err;
 113 }
 114
 115 return 1;
 116
 117 err:
 118
 119 if (pkey && *pkey) EVP_PKEY_free (*pkey);
 120 if (cert && *cert) X509_free (*cert);
 121 if (ca) sk_pop_free (*ca, X509_free);
 122 return 0;
 123
 124 }
 125
 126 /* Parse the outer PKCS#12 structure */
 127
 128 static int parse_pk12 (PKCS12 *p12, unsigned char *pass, int passlen,
 129              EVP_PKEY **pkey, X509 **cert, STACK **ca)
 130 {
 131         STACK *asafes, *bags;
 132         int i, bagnid;
 133         PKCS7 *p7;
 134         ASN1_OCTET_STRING *keyid = NULL;
 135         char keymatch = 0;
 136         if (!( asafes = M_PKCS12_unpack_authsafes (p12))) return 0;
 137         for (i = 0; i < sk_num (asafes); i++) {
 138                 p7 = (PKCS7 *) sk_value (asafes, i);
 139                 bagnid = OBJ_obj2nid (p7->type);
 140                 if (bagnid == NID_pkcs7_data) {
 141                         bags = M_PKCS12_unpack_p7data (p7);
 142                 } else if (bagnid == NID_pkcs7_encrypted) {
 143                         bags = M_PKCS12_unpack_p7encdata (p7, pass, passlen);
 144                 } else continue;
 145                 if (!bags) {
 146                         sk_pop_free (asafes, PKCS7_free);
 147                         return 0;
 148                 }
 149                 if (!parse_bags (bags, pass, passlen, pkey, cert, ca,
 150                                                          &keyid, &keymatch)) {
 151                         sk_pop_free (bags, PKCS12_SAFEBAG_free);
 152                         sk_pop_free (asafes, PKCS7_free);
 153                         return 0;
 154                 }
 155                 sk_pop_free (bags, PKCS12_SAFEBAG_free);
 156         }
 157         sk_pop_free (asafes, PKCS7_free);
 158         if (keyid) ASN1_OCTET_STRING_free (keyid);
 159         return 1;
 160 }
 161
 162
 163 static int parse_bags (STACK *bags, unsigned char *pass, int passlen,
 164              EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid,
 165              char *keymatch)
 166 {
 167         int i;
 168         for (i = 0; i < sk_num (bags); i++) {
 169                 if (!parse_bag ((PKCS12_SAFEBAG *)sk_value (bags, i),
 170                          pass, passlen, pkey, cert, ca, keyid,
 171                                                          keymatch)) return 0;
 172         }
 173         return 1;
 174 }
 175
 176 #define MATCH_KEY  0x1
 177 #define MATCH_CERT 0x2
 178 #define MATCH_ALL  0x3
 179
 180 static int parse_bag (PKCS12_SAFEBAG *bag, unsigned char *pass, int passlen,
 181              EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid,
 182              char *keymatch)
 183 {
 184         PKCS8_PRIV_KEY_INFO *p8;
 185         X509 *x509;
 186         ASN1_OCTET_STRING *lkey = NULL;
 187         ASN1_TYPE *attrib;
 188
 189
 190         if ((attrib = PKCS12_get_attr (bag, NID_localKeyID)))
 191                                             lkey = attrib->value.octet_string;
 192
 193         /* Check for any local key id matching (if needed) */
 194         if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) {
 195                 if (*keyid) {
 196                         if (ASN1_OCTET_STRING_cmp (*keyid, lkey)) lkey = NULL;
 197                 } else {
 198                         if (!(*keyid = ASN1_OCTET_STRING_dup (lkey))) {
 199                                 PKCS12err(PKCS12_F_PARSE_BAGS,ERR_R_MALLOC_FAILURE);
 200                                 return 0;
 201                     }
 202                 }
 203         }
 204
 205         switch (M_PKCS12_bag_type(bag))
 206         {
 207         case NID_keyBag:
 208                 if (!lkey || !pkey) return 1;
 209                 if (!(*pkey = EVP_PKCS82PKEY (bag->value.keybag))) return 0;
 210                 *keymatch |= MATCH_KEY;
 211         break;
 212
 213         case NID_pkcs8ShroudedKeyBag:
 214                 if (!lkey || !pkey) return 1;
 215                 if (!(p8 = M_PKCS12_decrypt_skey (bag, pass, passlen)))
 216                                 return 0;
 217                 *pkey = EVP_PKCS82PKEY (p8);
 218                 PKCS8_PRIV_KEY_INFO_free (p8);
 219                 if (!(*pkey)) return 0;
 220                 *keymatch |= MATCH_KEY;
 221         break;
 222
 223         case NID_certBag:
 224                 if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
 225                                                                  return 1;
 226                 if (!(x509 = M_PKCS12_certbag2x509(bag))) return 0;
 227                 if (lkey) {
 228                         *keymatch |= MATCH_CERT;
 229                         if (cert) *cert = x509;
 230                 } else if (ca) sk_push (*ca, (char *)x509);
 231         break;
 232
 233         case NID_safeContentsBag:
 234                 return parse_bags(bag->value.safes, pass, passlen,
 235                                         pkey, cert, ca, keyid, keymatch);
 236         break;
 237
 238         default:
 239                 return 1;
 240         break;
 241         }
 242         return 1;
 243 }
 244