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      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     ERR_raise(ERR_LIB_OBJ, ERR_R_MALLOC_FAILURE);
     54     return NULL;
     55 }
     56 
     57 int 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