release/src/router/openssl/crypto/asn1/d2i_pr.c

   1 /* crypto/asn1/d2i_pr.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/bn.h>
  62 #include <openssl/evp.h>
  63 #include <openssl/objects.h>
  64 #ifndef OPENSSL_NO_ENGINE
  65 #include <openssl/engine.h>
  66 #endif
  67 #include <openssl/x509.h>
  68 #include <openssl/asn1.h>
  69 #include "asn1_locl.h"
  70
  71 EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
  72              long length)
  73         {
  74         EVP_PKEY *ret;
  75
  76         if ((a == NULL) || (*a == NULL))
  77                 {
  78                 if ((ret=EVP_PKEY_new()) == NULL)
  79                         {
  80                         ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);
  81                         return(NULL);
  82                         }
  83                 }
  84         else
  85                 {
  86                 ret= *a;
  87 #ifndef OPENSSL_NO_ENGINE
  88                 if (ret->engine)
  89                         {
  90                         ENGINE_finish(ret->engine);
  91                         ret->engine = NULL;
  92                         }
  93 #endif
  94                 }
  95
  96         if (!EVP_PKEY_set_type(ret, type))
  97                 {
  98                 ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
  99                 goto err;
 100                 }
 101
 102         if (!ret->ameth->old_priv_decode ||
 103                         !ret->ameth->old_priv_decode(ret, pp, length))
 104                 {
 105                 if (ret->ameth->priv_decode)
 106                         {
 107                         PKCS8_PRIV_KEY_INFO *p8=NULL;
 108                         p8=d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length);
 109                         if (!p8) goto err;
 110                         EVP_PKEY_free(ret);
 111                         ret = EVP_PKCS82PKEY(p8);
 112                         PKCS8_PRIV_KEY_INFO_free(p8);
 113
 114                         }
 115                 else
 116                         {
 117                         ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
 118                         goto err;
 119                         }
 120                 }
 121         if (a != NULL) (*a)=ret;
 122         return(ret);
 123 err:
 124         if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
 125         return(NULL);
 126         }
 127
 128 /* This works like d2i_PrivateKey() except it automatically works out the type */
 129
 130 EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
 131              long length)
 132 {
 133         STACK_OF(ASN1_TYPE) *inkey;
 134         const unsigned char *p;
 135         int keytype;
 136         p = *pp;
 137         /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
 138          * by analyzing it we can determine the passed structure: this
 139          * assumes the input is surrounded by an ASN1 SEQUENCE.
 140          */
 141         inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
 142         /* Since we only need to discern "traditional format" RSA and DSA
 143          * keys we can just count the elements.
 144          */
 145         if(sk_ASN1_TYPE_num(inkey) == 6)
 146                 keytype = EVP_PKEY_DSA;
 147         else if (sk_ASN1_TYPE_num(inkey) == 4)
 148                 keytype = EVP_PKEY_EC;
 149         else if (sk_ASN1_TYPE_num(inkey) == 3)
 150                 { /* This seems to be PKCS8, not traditional format */
 151                         PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length);
 152                         EVP_PKEY *ret;
 153
 154                         sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
 155                         if (!p8)
 156                                 {
 157                                 ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
 158                                 return NULL;
 159                                 }
 160                         ret = EVP_PKCS82PKEY(p8);
 161                         PKCS8_PRIV_KEY_INFO_free(p8);
 162                         if (a) {
 163                                 *a = ret;
 164                         }
 165                         return ret;
 166                 }
 167         else keytype = EVP_PKEY_RSA;
 168         sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
 169         return d2i_PrivateKey(keytype, a, pp, length);
 170 }