GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/asn1/asn_pack.c Lines: 15 70 21.4 %
Date: 2017-11-07 Branches: 8 48 16.7 %

Line Branch Exec Source
1
/* $OpenBSD: asn_pack.c,v 1.16 2017/01/29 17:49:22 beck Exp $ */
2
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3
 * project 1999.
4
 */
5
/* ====================================================================
6
 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 *
12
 * 1. Redistributions of source code must retain the above copyright
13
 *    notice, this list of conditions and the following disclaimer.
14
 *
15
 * 2. Redistributions in binary form must reproduce the above copyright
16
 *    notice, this list of conditions and the following disclaimer in
17
 *    the documentation and/or other materials provided with the
18
 *    distribution.
19
 *
20
 * 3. All advertising materials mentioning features or use of this
21
 *    software must display the following acknowledgment:
22
 *    "This product includes software developed by the OpenSSL Project
23
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24
 *
25
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26
 *    endorse or promote products derived from this software without
27
 *    prior written permission. For written permission, please contact
28
 *    licensing@OpenSSL.org.
29
 *
30
 * 5. Products derived from this software may not be called "OpenSSL"
31
 *    nor may "OpenSSL" appear in their names without prior written
32
 *    permission of the OpenSSL Project.
33
 *
34
 * 6. Redistributions of any form whatsoever must retain the following
35
 *    acknowledgment:
36
 *    "This product includes software developed by the OpenSSL Project
37
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38
 *
39
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50
 * OF THE POSSIBILITY OF SUCH DAMAGE.
51
 * ====================================================================
52
 *
53
 * This product includes cryptographic software written by Eric Young
54
 * (eay@cryptsoft.com).  This product includes software written by Tim
55
 * Hudson (tjh@cryptsoft.com).
56
 *
57
 */
58
59
#include <stdio.h>
60
61
#include <openssl/asn1.h>
62
#include <openssl/err.h>
63
64
#ifndef NO_ASN1_OLD
65
66
/* ASN1 packing and unpacking functions */
67
68
/* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
69
70
STACK_OF(OPENSSL_BLOCK) *
71
ASN1_seq_unpack(const unsigned char *buf, int len, d2i_of_void *d2i,
72
    void (*free_func)(OPENSSL_BLOCK))
73
{
74
	STACK_OF(OPENSSL_BLOCK) *sk;
75
	const unsigned char *pbuf;
76
77
	pbuf = buf;
78
	if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
79
					V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
80
		ASN1error(ASN1_R_DECODE_ERROR);
81
	return sk;
82
}
83
84
/* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
85
 * OPENSSL_malloc'ed buffer
86
 */
87
88
unsigned char *
89
ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d,
90
    unsigned char **buf, int *len)
91
{
92
	int safelen;
93
	unsigned char *safe, *p;
94
95
	if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
96
					      V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
97
		ASN1error(ASN1_R_ENCODE_ERROR);
98
		return NULL;
99
	}
100
	if (!(safe = malloc(safelen))) {
101
		ASN1error(ERR_R_MALLOC_FAILURE);
102
		return NULL;
103
	}
104
	p = safe;
105
	i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
106
								 IS_SEQUENCE);
107
	if (len)
108
		*len = safelen;
109
	if (buf)
110
		*buf = safe;
111
	return safe;
112
}
113
114
/* Extract an ASN1 object from an ASN1_STRING */
115
116
void *
117
ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i)
118
{
119
	const unsigned char *p;
120
	char *ret;
121
122
	p = oct->data;
123
	if (!(ret = d2i(NULL, &p, oct->length)))
124
		ASN1error(ASN1_R_DECODE_ERROR);
125
	return ret;
126
}
127
128
/* Pack an ASN1 object into an ASN1_STRING */
129
130
ASN1_STRING *
131
ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct)
132
{
133
	unsigned char *p;
134
	ASN1_STRING *octmp;
135
136
	if (!oct || !*oct) {
137
		if (!(octmp = ASN1_STRING_new())) {
138
			ASN1error(ERR_R_MALLOC_FAILURE);
139
			return NULL;
140
		}
141
	} else
142
		octmp = *oct;
143
144
	if (!(octmp->length = i2d(obj, NULL))) {
145
		ASN1error(ASN1_R_ENCODE_ERROR);
146
		goto err;
147
	}
148
	if (!(p = malloc (octmp->length))) {
149
		ASN1error(ERR_R_MALLOC_FAILURE);
150
		goto err;
151
	}
152
	octmp->data = p;
153
	i2d (obj, &p);
154
	if (oct)
155
		*oct = octmp;
156
	return octmp;
157
err:
158
	if (!oct || octmp != *oct) {
159
		ASN1_STRING_free(octmp);
160
		if (oct)
161
			*oct = NULL;
162
	}
163
	return NULL;
164
}
165
166
#endif
167
168
/* ASN1_ITEM versions of the above */
169
170
ASN1_STRING *
171
ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
172
{
173
	ASN1_STRING *octmp;
174
175

144
	if (!oct || !*oct) {
176
40
		if (!(octmp = ASN1_STRING_new ())) {
177
			ASN1error(ERR_R_MALLOC_FAILURE);
178
			return NULL;
179
		}
180
	} else
181
		octmp = *oct;
182
183
48
	free(octmp->data);
184
48
	octmp->data = NULL;
185
186
48
	if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
187
		ASN1error(ASN1_R_ENCODE_ERROR);
188
		goto err;
189
	}
190
48
	if (!octmp->data) {
191
		ASN1error(ERR_R_MALLOC_FAILURE);
192
		goto err;
193
	}
194
48
	if (oct)
195
48
		*oct = octmp;
196
48
	return octmp;
197
err:
198
	if (!oct || octmp != *oct)
199
		ASN1_STRING_free(octmp);
200
	return NULL;
201
48
}
202
203
/* Extract an ASN1 object from an ASN1_STRING */
204
205
void *
206
ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
207
{
208
44
	const unsigned char *p;
209
	void *ret;
210
211
22
	p = oct->data;
212
22
	if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
213
		ASN1error(ASN1_R_DECODE_ERROR);
214
22
	return ret;
215
22
}