a_bool.c revision 337982 
1/* crypto/asn1/a_bool.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/asn1t.h>
62
63int i2d_ASN1_BOOLEAN(int a, unsigned char **pp)
64{
65    int r;
66    unsigned char *p, *allocated = NULL;
67
68    r = ASN1_object_size(0, 1, V_ASN1_BOOLEAN);
69    if (pp == NULL)
70        return (r);
71
72    if (*pp == NULL) {
73        if ((p = allocated = OPENSSL_malloc(r)) == NULL) {
74            ASN1err(ASN1_F_I2D_ASN1_BOOLEAN, ERR_R_MALLOC_FAILURE);
75            return 0;
76        }
77    } else {
78        p = *pp;
79    }
80
81    ASN1_put_object(&p, 0, 1, V_ASN1_BOOLEAN, V_ASN1_UNIVERSAL);
82    *p = (unsigned char)a;
83
84
85    /*
86     * If a new buffer was allocated, just return it back.
87     * If not, return the incremented buffer pointer.
88     */
89    *pp = allocated != NULL ? allocated : p + 1;
90    return r;
91}
92
93int d2i_ASN1_BOOLEAN(int *a, const unsigned char **pp, long length)
94{
95    int ret = -1;
96    const unsigned char *p;
97    long len;
98    int inf, tag, xclass;
99    int i = 0;
100
101    p = *pp;
102    inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
103    if (inf & 0x80) {
104        i = ASN1_R_BAD_OBJECT_HEADER;
105        goto err;
106    }
107
108    if (tag != V_ASN1_BOOLEAN) {
109        i = ASN1_R_EXPECTING_A_BOOLEAN;
110        goto err;
111    }
112
113    if (len != 1) {
114        i = ASN1_R_BOOLEAN_IS_WRONG_LENGTH;
115        goto err;
116    }
117    ret = (int)*(p++);
118    if (a != NULL)
119        (*a) = ret;
120    *pp = p;
121    return (ret);
122 err:
123    ASN1err(ASN1_F_D2I_ASN1_BOOLEAN, i);
124    return (ret);
125}
126