1/* $OpenBSD: a_pubkey.c,v 1.7 2024/04/09 13:52:41 beck Exp $ */
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
61#include <openssl/opensslconf.h>
62
63#include <openssl/asn1.h>
64#include <openssl/bn.h>
65#include <openssl/err.h>
66#include <openssl/evp.h>
67#include <openssl/objects.h>
68
69#ifndef OPENSSL_NO_DSA
70#include <openssl/dsa.h>
71#endif
72#ifndef OPENSSL_NO_EC
73#include <openssl/ec.h>
74#endif
75#ifndef OPENSSL_NO_RSA
76#include <openssl/rsa.h>
77#endif
78
79#include "evp_local.h"
80
81EVP_PKEY *
82d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp, long length)
83{
84	EVP_PKEY *ret;
85
86	if ((a == NULL) || (*a == NULL)) {
87		if ((ret = EVP_PKEY_new()) == NULL) {
88			ASN1error(ERR_R_EVP_LIB);
89			return (NULL);
90		}
91	} else
92		ret = *a;
93
94	if (!EVP_PKEY_set_type(ret, type)) {
95		ASN1error(ERR_R_EVP_LIB);
96		goto err;
97	}
98
99	switch (EVP_PKEY_id(ret)) {
100#ifndef OPENSSL_NO_RSA
101	case EVP_PKEY_RSA:
102		if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) ==
103		    NULL) {
104			ASN1error(ERR_R_ASN1_LIB);
105			goto err;
106		}
107		break;
108#endif
109#ifndef OPENSSL_NO_DSA
110	case EVP_PKEY_DSA:
111		if (!d2i_DSAPublicKey(&(ret->pkey.dsa), pp, length)) {
112			ASN1error(ERR_R_ASN1_LIB);
113			goto err;
114		}
115		break;
116#endif
117#ifndef OPENSSL_NO_EC
118	case EVP_PKEY_EC:
119		if (!o2i_ECPublicKey(&(ret->pkey.ec), pp, length)) {
120			ASN1error(ERR_R_ASN1_LIB);
121			goto err;
122		}
123		break;
124#endif
125	default:
126		ASN1error(ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
127		goto err;
128		/* break; */
129	}
130	if (a != NULL)
131		(*a) = ret;
132	return (ret);
133
134 err:
135	if (a == NULL || *a != ret)
136		EVP_PKEY_free(ret);
137	return (NULL);
138}
139LCRYPTO_ALIAS(d2i_PublicKey);
140
141int
142i2d_PublicKey(EVP_PKEY *a, unsigned char **pp)
143{
144	switch (a->type) {
145#ifndef OPENSSL_NO_RSA
146	case EVP_PKEY_RSA:
147		return (i2d_RSAPublicKey(a->pkey.rsa, pp));
148#endif
149#ifndef OPENSSL_NO_DSA
150	case EVP_PKEY_DSA:
151		return (i2d_DSAPublicKey(a->pkey.dsa, pp));
152#endif
153#ifndef OPENSSL_NO_EC
154	case EVP_PKEY_EC:
155		return (i2o_ECPublicKey(a->pkey.ec, pp));
156#endif
157	default:
158		ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
159		return (-1);
160	}
161}
162LCRYPTO_ALIAS(i2d_PublicKey);
163