1/*
2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/objects.h>
13#include <openssl/buffer.h>
14#include "crypto/asn1.h"
15
16ASN1_OBJECT *OBJ_dup(const ASN1_OBJECT *o)
17{
18    ASN1_OBJECT *r;
19
20    if (o == NULL)
21        return NULL;
22    /* If object isn't dynamic it's an internal OID which is never freed */
23    if (!(o->flags & ASN1_OBJECT_FLAG_DYNAMIC))
24        return (ASN1_OBJECT *)o;
25
26    r = ASN1_OBJECT_new();
27    if (r == NULL) {
28        OBJerr(OBJ_F_OBJ_DUP, ERR_R_ASN1_LIB);
29        return NULL;
30    }
31
32    /* Set dynamic flags so everything gets freed up on error */
33
34    r->flags = o->flags | (ASN1_OBJECT_FLAG_DYNAMIC |
35                           ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
36                           ASN1_OBJECT_FLAG_DYNAMIC_DATA);
37
38    if (o->length > 0 && (r->data = OPENSSL_memdup(o->data, o->length)) == NULL)
39        goto err;
40
41    r->length = o->length;
42    r->nid = o->nid;
43
44    if (o->ln != NULL && (r->ln = OPENSSL_strdup(o->ln)) == NULL)
45        goto err;
46
47    if (o->sn != NULL && (r->sn = OPENSSL_strdup(o->sn)) == NULL)
48        goto err;
49
50    return r;
51 err:
52    ASN1_OBJECT_free(r);
53    OBJerr(OBJ_F_OBJ_DUP, ERR_R_MALLOC_FAILURE);
54    return NULL;
55}
56
57int OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
58{
59    int ret;
60
61    ret = (a->length - b->length);
62    if (ret)
63        return ret;
64    return memcmp(a->data, b->data, a->length);
65}
66