crypto/asn1/d2i_pu.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60 #include <openssl/bn.h>
  61 #include <openssl/evp.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/asn1.h>
  64 #ifndef OPENSSL_NO_RSA
  65 # include <openssl/rsa.h>
  66 #endif
  67 #ifndef OPENSSL_NO_DSA
  68 # include <openssl/dsa.h>
  69 #endif
  70 #ifndef OPENSSL_NO_EC
  71 # include <openssl/ec.h>
  72 #endif
  73
  74 #include "internal/evp_int.h"
  75
  76 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
  77                         long length)
  78 {
  79     EVP_PKEY *ret;
  80
  81     if ((a == NULL) || (*a == NULL)) {
  82         if ((ret = EVP_PKEY_new()) == NULL) {
  83             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_EVP_LIB);
  84             return (NULL);
  85         }
  86     } else
  87         ret = *a;
  88
  89     if (!EVP_PKEY_set_type(ret, type)) {
  90         ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_EVP_LIB);
  91         goto err;
  92     }
  93
  94     switch (EVP_PKEY_id(ret)) {
  95 #ifndef OPENSSL_NO_RSA
  96     case EVP_PKEY_RSA:
  97         if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) == NULL) {
  98             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
  99             goto err;
 100         }
 101         break;
 102 #endif
 103 #ifndef OPENSSL_NO_DSA
 104     case EVP_PKEY_DSA:
 105         /* TMP UGLY CAST */
 106         if (!d2i_DSAPublicKey(&ret->pkey.dsa, pp, length)) {
 107             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
 108             goto err;
 109         }
 110         break;
 111 #endif
 112 #ifndef OPENSSL_NO_EC
 113     case EVP_PKEY_EC:
 114         if (!o2i_ECPublicKey(&ret->pkey.ec, pp, length)) {
 115             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
 116             goto err;
 117         }
 118         break;
 119 #endif
 120     default:
 121         ASN1err(ASN1_F_D2I_PUBLICKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
 122         goto err;
 123         /* break; */
 124     }
 125     if (a != NULL)
 126         (*a) = ret;
 127     return (ret);
 128  err:
 129     if (a == NULL || *a != ret)
 130         EVP_PKEY_free(ret);
 131     return (NULL);
 132 }