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 <openssl/pkcs12.h>
  62
  63 /* Simplified PKCS#12 routines */
  64
  65 static int parse_pk12( PKCS12 *p12, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca);
  66 static int parse_bags( STACK *bags, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid, char *keymatch);
  67 static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen, EVP_PKEY **pkey, X509 **cert, STACK **ca, ASN1_OCTET_STRING **keyid, char *keymatch);
  68 /* Parse and decrypt a PKCS#12 structure returning user key, user cert
  69  * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
  70  * or it should point to a valid STACK structure. pkey and cert can be
  71  * passed unitialised.
  72  */
  73
  74 int PKCS12_parse (PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
  75              STACK **ca)
  76 {
  77
  78         /* Check for NULL PKCS12 structure */
  79
  80         if(!p12)
  81                 {
  82                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  83                 return 0;
  84                 }
  85
  86         /* Allocate stack for ca certificates if needed */
  87         if ((ca != NULL) && (*ca == NULL))
  88                 {
  89                 if (!(*ca = sk_new(NULL)))
  90                         {
  91                         PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
  92                         return 0;
  93                         }
  94                 }
  95
  96         if(pkey) *pkey = NULL;
  97         if(cert) *cert = NULL;
  98
  99         /* Check the mac */
 100
 101         if (!PKCS12_verify_mac (p12, pass, -1))
 102                 {
 103                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 104                 goto err;
 105                 }
 106
 107         if (!parse_pk12 (p12, pass, -1, pkey, cert, ca))
 108                 {
 109                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
 110                 goto err;
 111                 }
 112
 113         return 1;
 114
 115  err:
 116
 117         if (pkey && *pkey) EVP_PKEY_free (*pkey);
 118         if (cert && *cert) X509_free (*cert);
 119         if (ca) sk_pop_free (*ca, X509_free);
 120         return 0;
 121
 122 }
 123
 124 /* Parse the outer PKCS#12 structure */
 125
 126 static int parse_pk12 (PKCS12 *p12, const char *pass, int passlen,
 127              EVP_PKEY **pkey, X509 **cert, STACK **ca)
 128 {
 129         STACK *asafes, *bags;
 130         int i, bagnid;
 131         PKCS7 *p7;
 132         ASN1_OCTET_STRING *keyid = NULL;
 133         char keymatch = 0;
 134         if (!( asafes = M_PKCS12_unpack_authsafes (p12))) return 0;
 135         for (i = 0; i < sk_num (asafes); i++) {
 136                 p7 = (PKCS7 *) sk_value (asafes, i);
 137                 bagnid = OBJ_obj2nid (p7->type);
 138                 if (bagnid == NID_pkcs7_data) {
 139                         bags = M_PKCS12_unpack_p7data (p7);
 140                 } else if (bagnid == NID_pkcs7_encrypted) {
 141                         bags = M_PKCS12_unpack_p7encdata (p7, pass, passlen);
 142                 } else continue;
 143                 if (!bags) {
 144                         sk_pop_free (asafes, PKCS7_free);
 145                         return 0;
 146                 }
 147                 if (!parse_bags(bags, pass, passlen, pkey, cert, ca,
 148                                                          &keyid, &keymatch)) {
 149                         sk_pop_free(bags, PKCS12_SAFEBAG_free);
 150                         sk_pop_free(asafes, PKCS7_free);
 151                         return 0;
 152                 }
 153                 sk_pop_free(bags, PKCS12_SAFEBAG_free);
 154         }
 155         sk_pop_free(asafes, PKCS7_free);
 156         if (keyid) M_ASN1_OCTET_STRING_free(keyid);
 157         return 1;
 158 }
 159
 160
 161 static int parse_bags (STACK *bags, const char *pass, int passlen,
 162                        EVP_PKEY **pkey, X509 **cert, STACK **ca,
 163                        ASN1_OCTET_STRING **keyid, char *keymatch)
 164 {
 165         int i;
 166         for (i = 0; i < sk_num(bags); i++) {
 167                 if (!parse_bag((PKCS12_SAFEBAG *)sk_value (bags, i),
 168                          pass, passlen, pkey, cert, ca, keyid,
 169                                                          keymatch)) return 0;
 170         }
 171         return 1;
 172 }
 173
 174 #define MATCH_KEY  0x1
 175 #define MATCH_CERT 0x2
 176 #define MATCH_ALL  0x3
 177
 178 static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
 179                       EVP_PKEY **pkey, X509 **cert, STACK **ca,
 180                       ASN1_OCTET_STRING **keyid,
 181              char *keymatch)
 182 {
 183         PKCS8_PRIV_KEY_INFO *p8;
 184         X509 *x509;
 185         ASN1_OCTET_STRING *lkey = NULL;
 186         ASN1_TYPE *attrib;
 187
 188
 189         if ((attrib = PKCS12_get_attr (bag, NID_localKeyID)))
 190                                             lkey = attrib->value.octet_string;
 191
 192         /* Check for any local key id matching (if needed) */
 193         if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) {
 194                 if (*keyid) {
 195                         if (M_ASN1_OCTET_STRING_cmp(*keyid, lkey)) lkey = NULL;
 196                 } else {
 197                         if (!(*keyid = M_ASN1_OCTET_STRING_dup(lkey))) {
 198                                 PKCS12err(PKCS12_F_PARSE_BAGS,ERR_R_MALLOC_FAILURE);
 199                                 return 0;
 200                     }
 201                 }
 202         }
 203
 204         switch (M_PKCS12_bag_type(bag))
 205         {
 206         case NID_keyBag:
 207                 if (!lkey || !pkey) return 1;
 208                 if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag))) return 0;
 209                 *keymatch |= MATCH_KEY;
 210         break;
 211
 212         case NID_pkcs8ShroudedKeyBag:
 213                 if (!lkey || !pkey) return 1;
 214                 if (!(p8 = M_PKCS12_decrypt_skey(bag, pass, passlen)))
 215                                 return 0;
 216                 *pkey = EVP_PKCS82PKEY(p8);
 217                 PKCS8_PRIV_KEY_INFO_free(p8);
 218                 if (!(*pkey)) return 0;
 219                 *keymatch |= MATCH_KEY;
 220         break;
 221
 222         case NID_certBag:
 223                 if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
 224                                                                  return 1;
 225                 if (!(x509 = M_PKCS12_certbag2x509(bag))) return 0;
 226                 if (lkey) {
 227                         *keymatch |= MATCH_CERT;
 228                         if (cert) *cert = x509;
 229                 } else if (ca) sk_push (*ca, (char *)x509);
 230         break;
 231
 232         case NID_safeContentsBag:
 233                 return parse_bags(bag->value.safes, pass, passlen,
 234                                         pkey, cert, ca, keyid, keymatch);
 235         break;
 236
 237         default:
 238                 return 1;
 239         break;
 240         }
 241         return 1;
 242 }
 243