release/src/router/openssl/crypto/pkcs12/p12_kiss.c

   1 /* p12_kiss.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) 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, STACK_OF(X509) *ocerts);
  67
  68 static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
  69                        int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
  70
  71 static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen,
  72                         EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
  73
  74 /* Parse and decrypt a PKCS#12 structure returning user key, user cert
  75  * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
  76  * or it should point to a valid STACK structure. pkey and cert can be
  77  * passed unitialised.
  78  */
  79
  80 int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
  81              STACK_OF(X509) **ca)
  82 {
  83         STACK_OF(X509) *ocerts = NULL;
  84         X509 *x = NULL;
  85         /* Check for NULL PKCS12 structure */
  86
  87         if(!p12)
  88                 {
  89                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
  90                 return 0;
  91                 }
  92
  93         if(pkey)
  94                 *pkey = NULL;
  95         if(cert)
  96                 *cert = NULL;
  97
  98         /* Check the mac */
  99
 100         /* If password is zero length or NULL then try verifying both cases
 101          * to determine which password is correct. The reason for this is that
 102          * under PKCS#12 password based encryption no password and a zero length
 103          * password are two different things...
 104          */
 105
 106         if(!pass || !*pass) {
 107                 if(PKCS12_verify_mac(p12, NULL, 0)) pass = NULL;
 108                 else if(PKCS12_verify_mac(p12, "", 0)) pass = "";
 109                 else {
 110                         PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 111                         goto err;
 112                 }
 113         } else if (!PKCS12_verify_mac(p12, pass, -1)) {
 114                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_MAC_VERIFY_FAILURE);
 115                 goto err;
 116         }
 117
 118         /* Allocate stack for other certificates */
 119         ocerts = sk_X509_new_null();
 120
 121         if (!ocerts)
 122                 {
 123                 PKCS12err(PKCS12_F_PKCS12_PARSE,ERR_R_MALLOC_FAILURE);
 124                 return 0;
 125                 }
 126
 127         if (!parse_pk12 (p12, pass, -1, pkey, ocerts))
 128                 {
 129                 PKCS12err(PKCS12_F_PKCS12_PARSE,PKCS12_R_PARSE_ERROR);
 130                 goto err;
 131                 }
 132
 133         while ((x = sk_X509_pop(ocerts)))
 134                 {
 135                 if (pkey && *pkey && cert && !*cert)
 136                         {
 137                         if (X509_check_private_key(x, *pkey))
 138                                 {
 139                                 *cert = x;
 140                                 x = NULL;
 141                                 }
 142                         }
 143
 144                 if (ca && x)
 145                         {
 146                         if (!*ca)
 147                                 *ca = sk_X509_new_null();
 148                         if (!*ca)
 149                                 goto err;
 150                         if (!sk_X509_push(*ca, x))
 151                                 goto err;
 152                         x = NULL;
 153                         }
 154                 if (x)
 155                         X509_free(x);
 156                 }
 157
 158         if (ocerts)
 159                 sk_X509_pop_free(ocerts, X509_free);
 160
 161         return 1;
 162
 163  err:
 164
 165         if (pkey && *pkey)
 166                 EVP_PKEY_free(*pkey);
 167         if (cert && *cert)
 168                 X509_free(*cert);
 169         if (x)
 170                 X509_free(x);
 171         if (ocerts)
 172                 sk_X509_pop_free(ocerts, X509_free);
 173         return 0;
 174
 175 }
 176
 177 /* Parse the outer PKCS#12 structure */
 178
 179 static int parse_pk12(PKCS12 *p12, const char *pass, int passlen,
 180              EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
 181 {
 182         STACK_OF(PKCS7) *asafes;
 183         STACK_OF(PKCS12_SAFEBAG) *bags;
 184         int i, bagnid;
 185         PKCS7 *p7;
 186
 187         if (!(asafes = PKCS12_unpack_authsafes (p12))) return 0;
 188         for (i = 0; i < sk_PKCS7_num (asafes); i++) {
 189                 p7 = sk_PKCS7_value (asafes, i);
 190                 bagnid = OBJ_obj2nid (p7->type);
 191                 if (bagnid == NID_pkcs7_data) {
 192                         bags = PKCS12_unpack_p7data(p7);
 193                 } else if (bagnid == NID_pkcs7_encrypted) {
 194                         bags = PKCS12_unpack_p7encdata(p7, pass, passlen);
 195                 } else continue;
 196                 if (!bags) {
 197                         sk_PKCS7_pop_free(asafes, PKCS7_free);
 198                         return 0;
 199                 }
 200                 if (!parse_bags(bags, pass, passlen, pkey, ocerts)) {
 201                         sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 202                         sk_PKCS7_pop_free(asafes, PKCS7_free);
 203                         return 0;
 204                 }
 205                 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
 206         }
 207         sk_PKCS7_pop_free(asafes, PKCS7_free);
 208         return 1;
 209 }
 210
 211
 212 static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
 213                       int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
 214 {
 215         int i;
 216         for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
 217                 if (!parse_bag(sk_PKCS12_SAFEBAG_value (bags, i),
 218                                  pass, passlen, pkey, ocerts))
 219                         return 0;
 220         }
 221         return 1;
 222 }
 223
 224 static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
 225                      EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
 226 {
 227         PKCS8_PRIV_KEY_INFO *p8;
 228         X509 *x509;
 229         ASN1_TYPE *attrib;
 230         ASN1_BMPSTRING *fname = NULL;
 231         ASN1_OCTET_STRING *lkid = NULL;
 232
 233         if ((attrib = PKCS12_get_attr (bag, NID_friendlyName)))
 234                 fname = attrib->value.bmpstring;
 235
 236         if ((attrib = PKCS12_get_attr (bag, NID_localKeyID)))
 237                 lkid = attrib->value.octet_string;
 238
 239         switch (M_PKCS12_bag_type(bag))
 240         {
 241         case NID_keyBag:
 242                 if (!pkey || *pkey)
 243                         return 1;
 244                 if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag)))
 245                         return 0;
 246         break;
 247
 248         case NID_pkcs8ShroudedKeyBag:
 249                 if (!pkey || *pkey)
 250                         return 1;
 251                 if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen)))
 252                                 return 0;
 253                 *pkey = EVP_PKCS82PKEY(p8);
 254                 PKCS8_PRIV_KEY_INFO_free(p8);
 255                 if (!(*pkey)) return 0;
 256         break;
 257
 258         case NID_certBag:
 259                 if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate )
 260                         return 1;
 261                 if (!(x509 = PKCS12_certbag2x509(bag)))
 262                         return 0;
 263                 if(lkid && !X509_keyid_set1(x509, lkid->data, lkid->length))
 264                         {
 265                         X509_free(x509);
 266                         return 0;
 267                         }
 268                 if(fname) {
 269                         int len, r;
 270                         unsigned char *data;
 271                         len = ASN1_STRING_to_UTF8(&data, fname);
 272                         if(len >= 0) {
 273                                 r = X509_alias_set1(x509, data, len);
 274                                 OPENSSL_free(data);
 275                                 if (!r)
 276                                         {
 277                                         X509_free(x509);
 278                                         return 0;
 279                                         }
 280                         }
 281                 }
 282
 283                 if(!sk_X509_push(ocerts, x509))
 284                         {
 285                         X509_free(x509);
 286                         return 0;
 287                         }
 288
 289         break;
 290
 291         case NID_safeContentsBag:
 292                 return parse_bags(bag->value.safes, pass, passlen,
 293                                         pkey, ocerts);
 294         break;
 295
 296         default:
 297                 return 1;
 298         break;
 299         }
 300         return 1;
 301 }
 302