crypto/objects/obj_lib.c

   1 /*
   2  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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
  16 ASN1_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         ERR_raise(ERR_LIB_OBJ, 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     return NULL;
  54 }
  55
  56 int OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
  57 {
  58     int ret;
  59
  60     ret = (a->length - b->length);
  61     if (ret)
  62         return ret;
  63     return memcmp(a->data, b->data, a->length);
  64 }