text: /* 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 <openssl/asn1.h>
  
  #include <limits.h>
  #include <string.h>
  
  #include <openssl/err.h>
  #include <openssl/mem.h>
  #include <openssl/obj.h>
  
  #include "../internal.h"
  
  
  int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
  {
      unsigned char *p;
      int objsize;
  
      if ((a == NULL) || (a->data == NULL))
          return (0);
  
      objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
      if (pp == NULL || objsize == -1)
          return objsize;
  
      p = *pp;
      ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
      OPENSSL_memcpy(p, a->data, a->length);
      p += a->length;
  
      *pp = p;
      return (objsize);
  }
  
  int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
  {
      return OBJ_obj2txt(buf, buf_len, a, 0);
  }
  
  int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
  {
      char buf[80], *p = buf;
      int i;
  
      if ((a == NULL) || (a->data == NULL))
          return (BIO_write(bp, "NULL", 4));
      i = i2t_ASN1_OBJECT(buf, sizeof buf, a);
      if (i > (int)(sizeof(buf) - 1)) {
          p = OPENSSL_malloc(i + 1);
          if (!p)
              return -1;
          i2t_ASN1_OBJECT(p, i + 1, a);
      }
      if (i <= 0)
          return BIO_write(bp, "<INVALID>", 9);
      BIO_write(bp, p, i);
      if (p != buf)
          OPENSSL_free(p);
      return (i);
  }
  
  ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
                               long length)
  {
      const unsigned char *p;
      long len;
      int tag, xclass;
      int inf, i;
      ASN1_OBJECT *ret = NULL;
      p = *pp;
      inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
      if (inf & 0x80) {
          i = ASN1_R_BAD_OBJECT_HEADER;
          goto err;
      }
  
      if (tag != V_ASN1_OBJECT) {
          i = ASN1_R_EXPECTING_AN_OBJECT;
          goto err;
      }
      ret = c2i_ASN1_OBJECT(a, &p, len);
      if (ret)
          *pp = p;
      return ret;
   err:
      OPENSSL_PUT_ERROR(ASN1, i);
      return (NULL);
  }
  
  ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
                               long len)
  {
      ASN1_OBJECT *ret = NULL;
      const unsigned char *p;
      unsigned char *data;
      int i, length;
  
      /*
       * Sanity check OID encoding. Need at least one content octet. MSB must
       * be clear in the last octet. can't have leading 0x80 in subidentifiers,
       * see: X.690 8.19.2
       */
      if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
          p[len - 1] & 0x80) {
          OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_OBJECT_ENCODING);
          return NULL;
      }
      /* Now 0 < len <= INT_MAX, so the cast is safe. */
      length = (int)len;
      for (i = 0; i < length; i++, p++) {
          if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
              OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_OBJECT_ENCODING);
              return NULL;
          }
      }
  
      /*
       * only the ASN1_OBJECTs from the 'table' will have values for ->sn or
       * ->ln
       */
      if ((a == NULL) || ((*a) == NULL) ||
          !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
          if ((ret = ASN1_OBJECT_new()) == NULL)
              return (NULL);
      } else
          ret = (*a);
  
      p = *pp;
      /* detach data from object */
      data = (unsigned char *)ret->data;
      ret->data = NULL;
      /* once detached we can change it */
      if ((data == NULL) || (ret->length < length)) {
          ret->length = 0;
          if (data != NULL)
              OPENSSL_free(data);
          data = (unsigned char *)OPENSSL_malloc(length);
          if (data == NULL) {
              i = ERR_R_MALLOC_FAILURE;
              goto err;
          }
          ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
      }
      OPENSSL_memcpy(data, p, length);
      /* reattach data to object, after which it remains const */
      ret->data = data;
      ret->length = length;
      ret->sn = NULL;
      ret->ln = NULL;
      /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
      p += length;
  
      if (a != NULL)
          (*a) = ret;
      *pp = p;
      return (ret);
   err:
      OPENSSL_PUT_ERROR(ASN1, i);
      if ((ret != NULL) && ((a == NULL) || (*a != ret)))
          ASN1_OBJECT_free(ret);
      return (NULL);
  }
  
  ASN1_OBJECT *ASN1_OBJECT_new(void)
  {
      ASN1_OBJECT *ret;
  
      ret = (ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
      if (ret == NULL) {
          OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
          return (NULL);
      }
      ret->length = 0;
      ret->data = NULL;
      ret->nid = 0;
      ret->sn = NULL;
      ret->ln = NULL;
      ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
      return (ret);
  }
  
  void ASN1_OBJECT_free(ASN1_OBJECT *a)
  {
      if (a == NULL)
          return;
      if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
  #ifndef CONST_STRICT            /* disable purely for compile-time strict
                                   * const checking. Doing this on a "real"
                                   * compile will cause memory leaks */
          if (a->sn != NULL)
              OPENSSL_free((void *)a->sn);
          if (a->ln != NULL)
              OPENSSL_free((void *)a->ln);
  #endif
          a->sn = a->ln = NULL;
      }
      if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
          if (a->data != NULL)
              OPENSSL_free((void *)a->data);
          a->data = NULL;
          a->length = 0;
      }
      if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
          OPENSSL_free(a);
  }
  
  ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
                                  const char *sn, const char *ln)
  {
      ASN1_OBJECT o;
  
      o.sn = sn;
      o.ln = ln;
      o.data = data;
      o.nid = nid;
      o.length = len;
      o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
          ASN1_OBJECT_FLAG_DYNAMIC_DATA;
      return (OBJ_dup(&o));
  }
  