openssl/crypto/objects/obj_lib.c

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/lhash.h>
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include "internal/asn1_int.h"

ASN1_OBJECT *OBJ_dup(const ASN1_OBJECT *o)
{
    ASN1_OBJECT *r;
    int i;
    char *ln = NULL, *sn = NULL;
    unsigned char *data = NULL;

    if (o == NULL)
        return (NULL);
    if (!(o->flags & ASN1_OBJECT_FLAG_DYNAMIC))
        return ((ASN1_OBJECT *)o); /* XXX: ugh! Why? What kind of duplication
                                    * is this??? */

    r = ASN1_OBJECT_new();
    if (r == NULL) {
        OBJerr(OBJ_F_OBJ_DUP, ERR_R_ASN1_LIB);
        return (NULL);
    }
    data = OPENSSL_malloc(o->length);
    if (data == NULL)
        goto err;
    if (o->data != NULL)
        memcpy(data, o->data, o->length);
    /* once data attached to object it remains const */
    r->data = data;
    r->length = o->length;
    r->nid = o->nid;
    r->ln = r->sn = NULL;
    if (o->ln != NULL) {
        i = strlen(o->ln) + 1;
        ln = OPENSSL_malloc(i);
        if (ln == NULL)
            goto err;
        memcpy(ln, o->ln, i);
        r->ln = ln;
    }

    if (o->sn != NULL) {
        i = strlen(o->sn) + 1;
        sn = OPENSSL_malloc(i);
        if (sn == NULL)
            goto err;
        memcpy(sn, o->sn, i);
        r->sn = sn;
    }
    r->flags = o->flags | (ASN1_OBJECT_FLAG_DYNAMIC |
                           ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
                           ASN1_OBJECT_FLAG_DYNAMIC_DATA);
    return (r);
 err:
    OBJerr(OBJ_F_OBJ_DUP, ERR_R_MALLOC_FAILURE);
    OPENSSL_free(ln);
    OPENSSL_free(sn);
    OPENSSL_free(data);
    OPENSSL_free(r);
    return (NULL);
}

int OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
{
    int ret;

    ret = (a->length - b->length);
    if (ret)
        return (ret);
    return (memcmp(a->data, b->data, a->length));
}