crypto/openssl-0.9/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,
  66                 EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca);
  67
  68 static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
  69                        int passlen, EVP_PKEY **pkey, X509 **cert,
  70                        STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid,
  71                        char *keymatch);
  72
  73 static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen,
  74                         EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca,
  75                         ASN1_OCTET_STRING **keyid, char *keymatch);
  76
  77 /* Parse and decrypt a PKCS#12 structure returning user key, user cert
  78  * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
  79  * or it should point to a valid STACK structure. pkey and cert can be
  80  * passed unitialised.
  81  */
  82
  83 int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
  84              STACK_OF(X509) **ca)
  85 {
  86
  87         /* Check for NULL PKCS12 structure */
  88
  89         if(!p12) {
  90                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  91                 return 0;
  92         }
  93
  94         /* Allocate stack for ca certificates if needed */
  95         if ((ca != NULL) && (*ca == NULL)) {
  96                 if (!(*ca = sk_X509_new_null())) {
  97                         PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
  98                         return 0;
  99                 }
 100         }
 101
 102         if(pkey) *pkey = NULL;
 103         if(cert) *cert = NULL;
 104
 105         /* Check the mac */
 106
 107         /* If password is zero length or NULL then try verifying both cases
 108          * to determine which password is correct. The reason for this is that
 109          * under PKCS#12 password based encryption no password and a zero length
 110          * password are two different things...
 111          */
 112
 113         if(!pass || !*pass) {
 114                 if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL;
 115                 else if(PKCS12_verify_mac(p12, "", 0)) pass = "";
 116                 else {
 117                         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 118                         goto err;
 119                 }
 120         } else if (!PKCS12_verify_mac(p12, pass, -1)) {
 121                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 122                 goto err;
 123         }
 124
 125         if (!parse_pk12 (p12, pass, -1, pkey, cert, ca))
 126                 {
 127                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
 128                 goto err;
 129                 }
 130
 131         return 1;
 132
 133  err:
 134
 135         if (pkey && *pkey) EVP_PKEY_free(*pkey);
 136         if (cert && *cert) X509_free(*cert);
 137         if (ca) sk_X509_pop_free(*ca, X509_free);
 138         return 0;
 139
 140 }
 141
 142 /* Parse the outer PKCS#12 structure */
 143
 144 static int parse_pk12(PKCS12 *p12, const char *pass, int passlen,
 145              EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca)
 146 {
 147         STACK_OF(PKCS7) *asafes;
 148         STACK_OF(PKCS12_SAFEBAG) *bags;
 149         int i, bagnid;
 150         PKCS7 *p7;
 151         ASN1_OCTET_STRING *keyid = NULL;
 152
 153         char keymatch = 0;
 154         if (!(asafes = PKCS12_unpack_authsafes (p12))) return 0;
 155         for (i = 0; i < sk_PKCS7_num (asafes); i++) {
 156                 p7 = sk_PKCS7_value (asafes, i);
 157                 bagnid = OBJ_obj2nid (p7->type);
 158                 if (bagnid == NID_pkcs7_data) {
 159                         bags = PKCS12_unpack_p7data(p7);
 160                 } else if (bagnid == NID_pkcs7_encrypted) {
 161                         bags = PKCS12_unpack_p7encdata(p7, pass, passlen);
 162                 } else continue;
 163                 if (!bags) {
 164                         sk_PKCS7_pop_free(asafes, PKCS7_free);
 165                         return 0;
 166                 }
 167                 if (!parse_bags(bags, pass, passlen, pkey, cert, ca,
 168                                                          &keyid, &keymatch)) {
 169                         sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 170                         sk_PKCS7_pop_free(asafes, PKCS7_free);
 171                         return 0;
 172                 }
 173                 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 174         }
 175         sk_PKCS7_pop_free(asafes, PKCS7_free);
 176         if (keyid) M_ASN1_OCTET_STRING_free(keyid);
 177         return 1;
 178 }
 179
 180
 181 static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
 182                       int passlen, EVP_PKEY **pkey, X509 **cert,
 183                       STACK_OF(X509) **ca, ASN1_OCTET_STRING **keyid,
 184                       char *keymatch)
 185 {
 186         int i;
 187         for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
 188                 if (!parse_bag(sk_PKCS12_SAFEBAG_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(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
 200                      EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca,
 201                      ASN1_OCTET_STRING **keyid,
 202                      char *keymatch)
 203 {
 204         PKCS8_PRIV_KEY_INFO *p8;
 205         X509 *x509;
 206         ASN1_OCTET_STRING *lkey = NULL, *ckid = NULL;
 207         ASN1_TYPE *attrib;
 208         ASN1_BMPSTRING *fname = NULL;
 209
 210         if ((attrib = PKCS12_get_attr (bag, NID_friendlyName)))
 211                 fname = attrib->value.bmpstring;
 212
 213         if ((attrib = PKCS12_get_attr (bag, NID_localKeyID))) {
 214                 lkey = attrib->value.octet_string;
 215                 ckid = lkey;
 216         }
 217
 218         /* Check for any local key id matching (if needed) */
 219         if (lkey && ((*keymatch & MATCH_ALL) != MATCH_ALL)) {
 220                 if (*keyid) {
 221                         if (M_ASN1_OCTET_STRING_cmp(*keyid, lkey)) lkey = NULL;
 222                 } else {
 223                         if (!(*keyid = M_ASN1_OCTET_STRING_dup(lkey))) {
 224                                 PKCS12err(PKCS12_F_PARSE_BAG,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 = 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 = PKCS12_certbag2x509(bag))) return 0;
 252                 if(ckid)
 253                         {
 254                         if (!X509_keyid_set1(x509, ckid->data, ckid->length))
 255                                 {
 256                                 X509_free(x509);
 257                                 return 0;
 258                                 }
 259                         }
 260                 if(fname) {
 261                         int len, r;
 262                         unsigned char *data;
 263                         len = ASN1_STRING_to_UTF8(&data, fname);
 264                         if(len > 0) {
 265                                 r = X509_alias_set1(x509, data, len);
 266                                 OPENSSL_free(data);
 267                                 if (!r)
 268                                         {
 269                                         X509_free(x509);
 270                                         return 0;
 271                                         }
 272                         }
 273                 }
 274
 275
 276                 if (lkey) {
 277                         *keymatch |= MATCH_CERT;
 278                         if (cert) *cert = x509;
 279                         else X509_free(x509);
 280                 } else {
 281                         if(ca) sk_X509_push (*ca, x509);
 282                         else X509_free(x509);
 283                 }
 284         break;
 285
 286         case NID_safeContentsBag:
 287                 return parse_bags(bag->value.safes, pass, passlen,
 288                                         pkey, cert, ca, keyid, keymatch);
 289         break;
 290
 291         default:
 292                 return 1;
 293         break;
 294         }
 295         return 1;
 296 }
 297