xref: /freebsd/crypto/openssl/crypto/asn1/d2i_pr.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /* crypto/asn1/d2i_pr.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 #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_PrivateKey(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 			{
84 			ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);
85 			return(NULL);
86 			}
87 		}
88 	else	ret= *a;
89 
90 	ret->save_type=type;
91 	ret->type=EVP_PKEY_type(type);
92 	switch (ret->type)
93 		{
94 #ifndef OPENSSL_NO_RSA
95 	case EVP_PKEY_RSA:
96 		if ((ret->pkey.rsa=d2i_RSAPrivateKey(NULL,
97 			(const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
98 			{
99 			ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
100 			goto err;
101 			}
102 		break;
103 #endif
104 #ifndef OPENSSL_NO_DSA
105 	case EVP_PKEY_DSA:
106 		if ((ret->pkey.dsa=d2i_DSAPrivateKey(NULL,
107 			(const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
108 			{
109 			ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
110 			goto err;
111 			}
112 		break;
113 #endif
114 #ifndef OPENSSL_NO_EC
115 	case EVP_PKEY_EC:
116 		if ((ret->pkey.ec = d2i_ECPrivateKey(NULL,
117 			(const unsigned char **)pp, length)) == NULL)
118 			{
119 			ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);
120 			goto err;
121 			}
122 		break;
123 #endif
124 	default:
125 		ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
126 		goto err;
127 		/* break; */
128 		}
129 	if (a != NULL) (*a)=ret;
130 	return(ret);
131 err:
132 	if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
133 	return(NULL);
134 	}
135 
136 /* This works like d2i_PrivateKey() except it automatically works out the type */
137 
138 EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
139 	     long length)
140 {
141 	STACK_OF(ASN1_TYPE) *inkey;
142 	const unsigned char *p;
143 	int keytype;
144 	p = *pp;
145 	/* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
146 	 * by analyzing it we can determine the passed structure: this
147 	 * assumes the input is surrounded by an ASN1 SEQUENCE.
148 	 */
149 	inkey = d2i_ASN1_SET_OF_ASN1_TYPE(NULL, &p, length, d2i_ASN1_TYPE,
150 			ASN1_TYPE_free, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
151 	/* Since we only need to discern "traditional format" RSA and DSA
152 	 * keys we can just count the elements.
153          */
154 	if(sk_ASN1_TYPE_num(inkey) == 6)
155 		keytype = EVP_PKEY_DSA;
156 	else if (sk_ASN1_TYPE_num(inkey) == 4)
157 		keytype = EVP_PKEY_EC;
158 	else keytype = EVP_PKEY_RSA;
159 	sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
160 	return d2i_PrivateKey(keytype, a, pp, length);
161 }
162