crypto/objects/obj_lib.c

   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 #include "internal/asn1_int.h"
  65
  66 ASN1_OBJECT *OBJ_dup(const ASN1_OBJECT *o)
  67 {
  68     ASN1_OBJECT *r;
  69     int i;
  70     char *ln = NULL, *sn = NULL;
  71     unsigned char *data = NULL;
  72
  73     if (o == NULL)
  74         return (NULL);
  75     if (!(o->flags & ASN1_OBJECT_FLAG_DYNAMIC))
  76         return ((ASN1_OBJECT *)o); /* XXX: ugh! Why? What kind of duplication
  77                                     * is this??? */
  78
  79     r = ASN1_OBJECT_new();
  80     if (r == NULL) {
  81         OBJerr(OBJ_F_OBJ_DUP, ERR_R_ASN1_LIB);
  82         return (NULL);
  83     }
  84     data = OPENSSL_malloc(o->length);
  85     if (data == NULL)
  86         goto err;
  87     if (o->data != NULL)
  88         memcpy(data, o->data, o->length);
  89     /* once data attached to object it remains const */
  90     r->data = data;
  91     r->length = o->length;
  92     r->nid = o->nid;
  93     r->ln = r->sn = NULL;
  94     if (o->ln != NULL) {
  95         i = strlen(o->ln) + 1;
  96         ln = OPENSSL_malloc(i);
  97         if (ln == NULL)
  98             goto err;
  99         memcpy(ln, o->ln, i);
 100         r->ln = ln;
 101     }
 102
 103     if (o->sn != NULL) {
 104         i = strlen(o->sn) + 1;
 105         sn = OPENSSL_malloc(i);
 106         if (sn == NULL)
 107             goto err;
 108         memcpy(sn, o->sn, i);
 109         r->sn = sn;
 110     }
 111     r->flags = o->flags | (ASN1_OBJECT_FLAG_DYNAMIC |
 112                            ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
 113                            ASN1_OBJECT_FLAG_DYNAMIC_DATA);
 114     return (r);
 115  err:
 116     OBJerr(OBJ_F_OBJ_DUP, ERR_R_MALLOC_FAILURE);
 117     if (ln != NULL)
 118         OPENSSL_free(ln);
 119     if (sn != NULL)
 120         OPENSSL_free(sn);
 121     if (data != NULL)
 122         OPENSSL_free(data);
 123     if (r != NULL)
 124         OPENSSL_free(r);
 125     return (NULL);
 126 }
 127
 128 int OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
 129 {
 130     int ret;
 131
 132     ret = (a->length - b->length);
 133     if (ret)
 134         return (ret);
 135     return (memcmp(a->data, b->data, a->length));
 136 }