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a_object.c

/* crypto/asn1/a_object.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 <limits.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/asn1.h>
#include <openssl/objects.h>
#include <openssl/bn.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) return objsize;

      p= *pp;
      ASN1_put_object(&p,0,a->length,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
      memcpy(p,a->data,a->length);
      p+=a->length;

      *pp=p;
      return(objsize);
      }

int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
      {
      int i,first,len=0,c, use_bn;
      char ftmp[24], *tmp = ftmp;
      int tmpsize = sizeof ftmp;
      const char *p;
      unsigned long l;
      BIGNUM *bl = NULL;

      if (num == 0)
            return(0);
      else if (num == -1)
            num=strlen(buf);

      p=buf;
      c= *(p++);
      num--;
      if ((c >= '0') && (c <= '2'))
            {
            first= c-'0';
            }
      else
            {
            ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
            goto err;
            }

      if (num <= 0)
            {
            ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
            goto err;
            }
      c= *(p++);
      num--;
      for (;;)
            {
            if (num <= 0) break;
            if ((c != '.') && (c != ' '))
                  {
                  ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
                  goto err;
                  }
            l=0;
            use_bn = 0;
            for (;;)
                  {
                  if (num <= 0) break;
                  num--;
                  c= *(p++);
                  if ((c == ' ') || (c == '.'))
                        break;
                  if ((c < '0') || (c > '9'))
                        {
                        ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
                        goto err;
                        }
                  if (!use_bn && l > (ULONG_MAX / 10L))
                        {
                        use_bn = 1;
                        if (!bl)
                              bl = BN_new();
                        if (!bl || !BN_set_word(bl, l))
                              goto err;
                        }
                  if (use_bn)
                        {
                        if (!BN_mul_word(bl, 10L)
                              || !BN_add_word(bl, c-'0'))
                              goto err;
                        }
                  else
                        l=l*10L+(long)(c-'0');
                  }
            if (len == 0)
                  {
                  if ((first < 2) && (l >= 40))
                        {
                        ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
                        goto err;
                        }
                  if (use_bn)
                        {
                        if (!BN_add_word(bl, first * 40))
                              goto err;
                        }
                  else
                        l+=(long)first*40;
                  }
            i=0;
            if (use_bn)
                  {
                  int blsize;
                  blsize = BN_num_bits(bl);
                  blsize = (blsize + 6)/7;
                  if (blsize > tmpsize)
                        {
                        if (tmp != ftmp)
                              OPENSSL_free(tmp);
                        tmpsize = blsize + 32;
                        tmp = OPENSSL_malloc(tmpsize);
                        if (!tmp)
                              goto err;
                        }
                  while(blsize--)
                        tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
                  }
            else
                  {
                              
                  for (;;)
                        {
                        tmp[i++]=(unsigned char)l&0x7f;
                        l>>=7L;
                        if (l == 0L) break;
                        }

                  }
            if (out != NULL)
                  {
                  if (len+i > olen)
                        {
                        ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
                        goto err;
                        }
                  while (--i > 0)
                        out[len++]=tmp[i]|0x80;
                  out[len++]=tmp[0];
                  }
            else
                  len+=i;
            }
      if (tmp != ftmp)
            OPENSSL_free(tmp);
      if (bl)
            BN_free(bl);
      return(len);
err:
      if (tmp != ftmp)
            OPENSSL_free(tmp);
      if (bl)
            BN_free(bl);
      return(0);
      }

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:
      ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
      if ((ret != NULL) && ((a == NULL) || (*a != ret)))
            ASN1_OBJECT_free(ret);
      return(NULL);
}
ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
           long len)
      {
      ASN1_OBJECT *ret=NULL;
      const unsigned char *p;
      int i;
      /* Sanity check OID encoding: can't have leading 0x80 in
       * subidentifiers, see: X.690 8.19.2
       */
      for (i = 0, p = *pp + 1; i < len - 1; i++, p++)
            {
            if (*p == 0x80 && (!i || !(p[-1] & 0x80)))
                  {
                  ASN1err(ASN1_F_C2I_ASN1_OBJECT,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;
      if ((ret->data == NULL) || (ret->length < len))
            {
            if (ret->data != NULL) OPENSSL_free(ret->data);
            ret->data=(unsigned char *)OPENSSL_malloc(len ? (int)len : 1);
            ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
            if (ret->data == NULL)
                  { i=ERR_R_MALLOC_FAILURE; goto err; }
            }
      memcpy(ret->data,p,(int)len);
      ret->length=(int)len;
      ret->sn=NULL;
      ret->ln=NULL;
      /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
      p+=len;

      if (a != NULL) (*a)=ret;
      *pp=p;
      return(ret);
err:
      ASN1err(ASN1_F_C2I_ASN1_OBJECT,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)
            {
            ASN1err(ASN1_F_ASN1_OBJECT_NEW,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(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));
      }

IMPLEMENT_STACK_OF(ASN1_OBJECT)
IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT)

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