crypto/asn1/d2i_pu.c

   1 /* crypto/asn1/d2i_pu.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 "internal/cryptlib.h"
  61 #include <openssl/bn.h>
  62 #include <openssl/evp.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/asn1.h>
  65 #ifndef OPENSSL_NO_RSA
  66 # include <openssl/rsa.h>
  67 #endif
  68 #ifndef OPENSSL_NO_DSA
  69 # include <openssl/dsa.h>
  70 #endif
  71 #ifndef OPENSSL_NO_EC
  72 # include <openssl/ec.h>
  73 #endif
  74
  75 #include "internal/evp_int.h"
  76
  77 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
  78                         long length)
  79 {
  80     EVP_PKEY *ret;
  81
  82     if ((a == NULL) || (*a == NULL)) {
  83         if ((ret = EVP_PKEY_new()) == NULL) {
  84             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_EVP_LIB);
  85             return (NULL);
  86         }
  87     } else
  88         ret = *a;
  89
  90     if (!EVP_PKEY_set_type(ret, type)) {
  91         ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_EVP_LIB);
  92         goto err;
  93     }
  94
  95     switch (EVP_PKEY_id(ret)) {
  96 #ifndef OPENSSL_NO_RSA
  97     case EVP_PKEY_RSA:
  98         if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) == NULL) {
  99             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
 100             goto err;
 101         }
 102         break;
 103 #endif
 104 #ifndef OPENSSL_NO_DSA
 105     case EVP_PKEY_DSA:
 106         /* TMP UGLY CAST */
 107         if (!d2i_DSAPublicKey(&ret->pkey.dsa, pp, length)) {
 108             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
 109             goto err;
 110         }
 111         break;
 112 #endif
 113 #ifndef OPENSSL_NO_EC
 114     case EVP_PKEY_EC:
 115         if (!o2i_ECPublicKey(&ret->pkey.ec, pp, length)) {
 116             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
 117             goto err;
 118         }
 119         break;
 120 #endif
 121     default:
 122         ASN1err(ASN1_F_D2I_PUBLICKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
 123         goto err;
 124         /* break; */
 125     }
 126     if (a != NULL)
 127         (*a) = ret;
 128     return (ret);
 129  err:
 130     if (a == NULL || *a != ret)
 131         EVP_PKEY_free(ret);
 132     return (NULL);
 133 }