GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/asn1/a_enum.c Lines: 26 66 39.4 %
Date: 2017-11-07 Branches: 13 45 28.9 %

Line Branch Exec Source
1
/* $OpenBSD: a_enum.c,v 1.18 2017/01/29 17:49:22 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/asn1.h>
62
#include <openssl/bn.h>
63
#include <openssl/err.h>
64
65
/*
66
 * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
67
 * for comments on encoding see a_int.c
68
 */
69
70
int
71
ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
72
{
73
	int j, k;
74
	unsigned int i;
75
8
	unsigned char buf[sizeof(long) + 1];
76
	long d;
77
78
4
	a->type = V_ASN1_ENUMERATED;
79
4
	if (a->length < (int)(sizeof(long) + 1)) {
80
4
		free(a->data);
81
4
		a->data = calloc(1, sizeof(long) + 1);
82
4
	}
83
4
	if (a->data == NULL) {
84
		ASN1error(ERR_R_MALLOC_FAILURE);
85
		return (0);
86
	}
87
	d = v;
88
4
	if (d < 0) {
89
		d = -d;
90
		a->type = V_ASN1_NEG_ENUMERATED;
91
	}
92
93
12
	for (i = 0; i < sizeof(long); i++) {
94
4
		if (d == 0)
95
			break;
96
		buf[i] = (int)d & 0xff;
97
		d >>= 8;
98
	}
99
	j = 0;
100
8
	for (k = i - 1; k >= 0; k--)
101
		a->data[j++] = buf[k];
102
4
	a->length = j;
103
4
	return (1);
104
4
}
105
106
long
107
ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
108
{
109
	int neg = 0, i;
110
	long r = 0;
111
112
20
	if (a == NULL)
113
		return (0L);
114
10
	i = a->type;
115
10
	if (i == V_ASN1_NEG_ENUMERATED)
116
		neg = 1;
117
10
	else if (i != V_ASN1_ENUMERATED)
118
		return -1;
119
120
10
	if (a->length > (int)sizeof(long)) {
121
		/* hmm... a bit ugly */
122
		return -1;
123
	}
124
10
	if (a->data == NULL)
125
		return 0;
126
127
28
	for (i = 0; i < a->length; i++) {
128
4
		r <<= 8;
129
4
		r |= (unsigned char)a->data[i];
130
	}
131
10
	if (neg)
132
		r = -r;
133
10
	return (r);
134
10
}
135
136
ASN1_ENUMERATED *
137
BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
138
{
139
	ASN1_ENUMERATED *ret;
140
	int len, j;
141
142
	if (ai == NULL)
143
		ret = ASN1_ENUMERATED_new();
144
	else
145
		ret = ai;
146
	if (ret == NULL) {
147
		ASN1error(ERR_R_NESTED_ASN1_ERROR);
148
		goto err;
149
	}
150
	if (BN_is_negative(bn))
151
		ret->type = V_ASN1_NEG_ENUMERATED;
152
	else
153
		ret->type = V_ASN1_ENUMERATED;
154
	j = BN_num_bits(bn);
155
	len = ((j == 0) ? 0 : ((j / 8) + 1));
156
	if (ret->length < len + 4) {
157
		unsigned char *new_data = realloc(ret->data, len + 4);
158
		if (!new_data) {
159
			ASN1error(ERR_R_MALLOC_FAILURE);
160
			goto err;
161
		}
162
		ret->data = new_data;
163
	}
164
	ret->length = BN_bn2bin(bn, ret->data);
165
166
	/* Correct zero case */
167
	if (!ret->length) {
168
		ret->data[0] = 0;
169
		ret->length = 1;
170
	}
171
	return (ret);
172
173
err:
174
	if (ret != ai)
175
		ASN1_ENUMERATED_free(ret);
176
	return (NULL);
177
}
178
179
BIGNUM *
180
ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
181
{
182
	BIGNUM *ret;
183
184
	if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL)
185
		ASN1error(ASN1_R_BN_LIB);
186
	else if (ai->type == V_ASN1_NEG_ENUMERATED)
187
		BN_set_negative(ret, 1);
188
	return (ret);
189
}