obj_lib.c revision 296341 
1/* crypto/objects/obj_lib.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/lhash.h>
62#include <openssl/objects.h>
63#include <openssl/buffer.h>
64
65ASN1_OBJECT *OBJ_dup(const ASN1_OBJECT *o)
66{
67    ASN1_OBJECT *r;
68    int i;
69    char *ln = NULL, *sn = NULL;
70    unsigned char *data = NULL;
71
72    if (o == NULL)
73        return (NULL);
74    if (!(o->flags & ASN1_OBJECT_FLAG_DYNAMIC))
75        return ((ASN1_OBJECT *)o); /* XXX: ugh! Why? What kind of duplication
76                                    * is this??? */
77
78    r = ASN1_OBJECT_new();
79    if (r == NULL) {
80        OBJerr(OBJ_F_OBJ_DUP, ERR_R_ASN1_LIB);
81        return (NULL);
82    }
83    data = OPENSSL_malloc(o->length);
84    if (data == NULL)
85        goto err;
86    if (o->data != NULL)
87        memcpy(data, o->data, o->length);
88    /* once data attached to object it remains const */
89    r->data = data;
90    r->length = o->length;
91    r->nid = o->nid;
92    r->ln = r->sn = NULL;
93    if (o->ln != NULL) {
94        i = strlen(o->ln) + 1;
95        ln = OPENSSL_malloc(i);
96        if (ln == NULL)
97            goto err;
98        memcpy(ln, o->ln, i);
99        r->ln = ln;
100    }
101
102    if (o->sn != NULL) {
103        i = strlen(o->sn) + 1;
104        sn = OPENSSL_malloc(i);
105        if (sn == NULL)
106            goto err;
107        memcpy(sn, o->sn, i);
108        r->sn = sn;
109    }
110    r->flags = o->flags | (ASN1_OBJECT_FLAG_DYNAMIC |
111                           ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
112                           ASN1_OBJECT_FLAG_DYNAMIC_DATA);
113    return (r);
114 err:
115    OBJerr(OBJ_F_OBJ_DUP, ERR_R_MALLOC_FAILURE);
116    if (ln != NULL)
117        OPENSSL_free(ln);
118    if (sn != NULL)
119        OPENSSL_free(sn);
120    if (data != NULL)
121        OPENSSL_free(data);
122    if (r != NULL)
123        OPENSSL_free(r);
124    return (NULL);
125}
126
127int OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
128{
129    int ret;
130
131    ret = (a->length - b->length);
132    if (ret)
133        return (ret);
134    return (memcmp(a->data, b->data, a->length));
135}
136