d2i_pu.c revision 55714 
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 "cryptlib.h"
61#include <openssl/bn.h>
62#include <openssl/evp.h>
63#include <openssl/objects.h>
64#include <openssl/asn1.h>
65
66EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, unsigned char **pp,
67	     long length)
68	{
69	EVP_PKEY *ret;
70
71	if ((a == NULL) || (*a == NULL))
72		{
73		if ((ret=EVP_PKEY_new()) == NULL)
74			{
75			ASN1err(ASN1_F_D2I_PUBLICKEY,ERR_R_EVP_LIB);
76			return(NULL);
77			}
78		}
79	else	ret= *a;
80
81	ret->save_type=type;
82	ret->type=EVP_PKEY_type(type);
83	switch (ret->type)
84		{
85#ifndef NO_RSA
86	case EVP_PKEY_RSA:
87		if ((ret->pkey.rsa=d2i_RSAPublicKey(NULL,pp,length)) == NULL)
88			{
89			ASN1err(ASN1_F_D2I_PUBLICKEY,ERR_R_ASN1_LIB);
90			goto err;
91			}
92		break;
93#endif
94#ifndef NO_DSA
95	case EVP_PKEY_DSA:
96		if ((ret->pkey.dsa=d2i_DSAPublicKey(NULL,pp,length)) == NULL)
97			{
98			ASN1err(ASN1_F_D2I_PUBLICKEY,ERR_R_ASN1_LIB);
99			goto err;
100			}
101		break;
102#endif
103	default:
104		ASN1err(ASN1_F_D2I_PUBLICKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
105		goto err;
106		/* break; */
107		}
108	if (a != NULL) (*a)=ret;
109	return(ret);
110err:
111	if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
112	return(NULL);
113	}
114
115