OpenSSL  1.0.1c
 All Classes Files Functions Variables Typedefs Enumerations Enumerator Macros
d2i_pu.c
Go to the documentation of this file.
1 /* crypto/asn1/d2i_pu.c */
2 /* Copyright (C) 1995-1998 Eric Young ([email protected])
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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 #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 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
76  long length)
77  {
78  EVP_PKEY *ret;
79 
80  if ((a == NULL) || (*a == NULL))
81  {
82  if ((ret=EVP_PKEY_new()) == NULL)
83  {
85  return(NULL);
86  }
87  }
88  else ret= *a;
89 
90  if (!EVP_PKEY_set_type(ret, type))
91  {
93  goto err;
94  }
95 
96  switch (EVP_PKEY_id(ret))
97  {
98 #ifndef OPENSSL_NO_RSA
99  case EVP_PKEY_RSA:
100  if ((ret->pkey.rsa=d2i_RSAPublicKey(NULL,
101  (const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
102  {
104  goto err;
105  }
106  break;
107 #endif
108 #ifndef OPENSSL_NO_DSA
109  case EVP_PKEY_DSA:
110  if (!d2i_DSAPublicKey(&(ret->pkey.dsa),
111  (const unsigned char **)pp,length)) /* TMP UGLY CAST */
112  {
114  goto err;
115  }
116  break;
117 #endif
118 #ifndef OPENSSL_NO_EC
119  case EVP_PKEY_EC:
120  if (!o2i_ECPublicKey(&(ret->pkey.ec),
121  (const unsigned char **)pp, length))
122  {
124  goto err;
125  }
126  break;
127 #endif
128  default:
130  goto err;
131  /* break; */
132  }
133  if (a != NULL) (*a)=ret;
134  return(ret);
135 err:
136  if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
137  return(NULL);
138  }
139