LCOV - code coverage report
Current view: top level - asn1 - a_int.c (source / functions) Hit Total Coverage
Test: lcov_coverage_final.info Lines: 103 180 57.2 %
Date: 2014-08-02 Functions: 8 9 88.9 %
Branches: 61 150 40.7 %

           Branch data     Line data    Source code
       1                 :            : /* crypto/asn1/a_int.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/asn1.h>
      62                 :            : #include <openssl/bn.h>
      63                 :            : 
      64                 :         20 : ASN1_INTEGER *ASN1_INTEGER_dup(const ASN1_INTEGER *x)
      65                 :         20 : { return M_ASN1_INTEGER_dup(x);}
      66                 :            : 
      67                 :       2405 : int ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y)
      68                 :            :         { 
      69                 :            :         int neg, ret;
      70                 :            :         /* Compare signs */
      71                 :       2405 :         neg = x->type & V_ASN1_NEG;
      72         [ -  + ]:       2405 :         if (neg != (y->type & V_ASN1_NEG))
      73                 :            :                 {
      74         [ #  # ]:          0 :                 if (neg)
      75                 :            :                         return -1;
      76                 :            :                 else
      77                 :          0 :                         return 1;
      78                 :            :                 }
      79                 :            : 
      80                 :       2405 :         ret = ASN1_STRING_cmp(x, y);
      81                 :            : 
      82         [ -  + ]:       2405 :         if (neg)
      83                 :          0 :                 return -ret;
      84                 :            :         else
      85                 :            :                 return ret;
      86                 :            :         }
      87                 :            :         
      88                 :            : 
      89                 :            : /* 
      90                 :            :  * This converts an ASN1 INTEGER into its content encoding.
      91                 :            :  * The internal representation is an ASN1_STRING whose data is a big endian
      92                 :            :  * representation of the value, ignoring the sign. The sign is determined by
      93                 :            :  * the type: V_ASN1_INTEGER for positive and V_ASN1_NEG_INTEGER for negative. 
      94                 :            :  *
      95                 :            :  * Positive integers are no problem: they are almost the same as the DER
      96                 :            :  * encoding, except if the first byte is >= 0x80 we need to add a zero pad.
      97                 :            :  *
      98                 :            :  * Negative integers are a bit trickier...
      99                 :            :  * The DER representation of negative integers is in 2s complement form.
     100                 :            :  * The internal form is converted by complementing each octet and finally 
     101                 :            :  * adding one to the result. This can be done less messily with a little trick.
     102                 :            :  * If the internal form has trailing zeroes then they will become FF by the
     103                 :            :  * complement and 0 by the add one (due to carry) so just copy as many trailing 
     104                 :            :  * zeros to the destination as there are in the source. The carry will add one
     105                 :            :  * to the last none zero octet: so complement this octet and add one and finally
     106                 :            :  * complement any left over until you get to the start of the string.
     107                 :            :  *
     108                 :            :  * Padding is a little trickier too. If the first bytes is > 0x80 then we pad
     109                 :            :  * with 0xff. However if the first byte is 0x80 and one of the following bytes
     110                 :            :  * is non-zero we pad with 0xff. The reason for this distinction is that 0x80
     111                 :            :  * followed by optional zeros isn't padded.
     112                 :            :  */
     113                 :            : 
     114                 :      31145 : int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
     115                 :            :         {
     116                 :      31145 :         int pad=0,ret,i,neg;
     117                 :      31145 :         unsigned char *p,*n,pb=0;
     118                 :            : 
     119         [ +  - ]:      31145 :         if (a == NULL) return(0);
     120                 :      31145 :         neg=a->type & V_ASN1_NEG;
     121         [ +  + ]:      31145 :         if (a->length == 0)
     122                 :            :                 ret=1;
     123                 :            :         else
     124                 :            :                 {
     125                 :      30764 :                 ret=a->length;
     126                 :      30764 :                 i=a->data[0];
     127         [ +  + ]:      30764 :                 if (!neg && (i > 127)) {
     128                 :            :                         pad=1;
     129                 :            :                         pb=0;
     130         [ -  + ]:      28108 :                 } else if(neg) {
     131         [ #  # ]:          0 :                         if(i>128) {
     132                 :            :                                 pad=1;
     133                 :            :                                 pb=0xFF;
     134         [ #  # ]:          0 :                         } else if(i == 128) {
     135                 :            :                         /*
     136                 :            :                          * Special case: if any other bytes non zero we pad:
     137                 :            :                          * otherwise we don't.
     138                 :            :                          */
     139 [ #  # ][ #  # ]:          0 :                                 for(i = 1; i < a->length; i++) if(a->data[i]) {
     140                 :            :                                                 pad=1;
     141                 :            :                                                 pb=0xFF;
     142                 :            :                                                 break;
     143                 :            :                                 }
     144                 :            :                         }
     145                 :            :                 }
     146                 :      30764 :                 ret+=pad;
     147                 :            :                 }
     148         [ +  + ]:      31145 :         if (pp == NULL) return(ret);
     149                 :       7270 :         p= *pp;
     150                 :            : 
     151         [ +  + ]:       7270 :         if (pad) *(p++)=pb;
     152         [ +  + ]:       7270 :         if (a->length == 0) *(p++)=0;
     153         [ +  - ]:       7205 :         else if (!neg) memcpy(p,a->data,(unsigned int)a->length);
     154                 :            :         else {
     155                 :            :                 /* Begin at the end of the encoding */
     156                 :          0 :                 n=a->data + a->length - 1;
     157                 :          0 :                 p += a->length - 1;
     158                 :          0 :                 i = a->length;
     159                 :            :                 /* Copy zeros to destination as long as source is zero */
     160         [ #  # ]:          0 :                 while(!*n) {
     161                 :          0 :                         *(p--) = 0;
     162                 :          0 :                         n--;
     163                 :          0 :                         i--;
     164                 :            :                 }
     165                 :            :                 /* Complement and increment next octet */
     166                 :          0 :                 *(p--) = ((*(n--)) ^ 0xff) + 1;
     167                 :          0 :                 i--;
     168                 :            :                 /* Complement any octets left */
     169         [ #  # ]:          0 :                 for(;i > 0; i--) *(p--) = *(n--) ^ 0xff;
     170                 :            :         }
     171                 :            : 
     172                 :       7270 :         *pp+=ret;
     173                 :       7270 :         return(ret);
     174                 :            :         }
     175                 :            : 
     176                 :            : /* Convert just ASN1 INTEGER content octets to ASN1_INTEGER structure */
     177                 :            : 
     178                 :      20368 : ASN1_INTEGER *c2i_ASN1_INTEGER(ASN1_INTEGER **a, const unsigned char **pp,
     179                 :            :              long len)
     180                 :            :         {
     181                 :      20368 :         ASN1_INTEGER *ret=NULL;
     182                 :            :         const unsigned char *p, *pend;
     183                 :            :         unsigned char *to,*s;
     184                 :            :         int i;
     185                 :            : 
     186 [ +  - ][ +  + ]:      20368 :         if ((a == NULL) || ((*a) == NULL))
     187                 :            :                 {
     188         [ +  - ]:      10851 :                 if ((ret=M_ASN1_INTEGER_new()) == NULL) return(NULL);
     189                 :      10851 :                 ret->type=V_ASN1_INTEGER;
     190                 :            :                 }
     191                 :            :         else
     192                 :            :                 ret=(*a);
     193                 :            : 
     194                 :      20368 :         p= *pp;
     195                 :      20368 :         pend = p + len;
     196                 :            : 
     197                 :            :         /* We must OPENSSL_malloc stuff, even for 0 bytes otherwise it
     198                 :            :          * signifies a missing NULL parameter. */
     199                 :      20368 :         s=(unsigned char *)OPENSSL_malloc((int)len+1);
     200         [ -  + ]:      20368 :         if (s == NULL)
     201                 :            :                 {
     202                 :          0 :                 i=ERR_R_MALLOC_FAILURE;
     203                 :            :                 goto err;
     204                 :            :                 }
     205                 :      20368 :         to=s;
     206         [ -  + ]:      20368 :         if(!len) {
     207                 :            :                 /* Strictly speaking this is an illegal INTEGER but we
     208                 :            :                  * tolerate it.
     209                 :            :                  */
     210                 :          0 :                 ret->type=V_ASN1_INTEGER;
     211         [ -  + ]:      20368 :         } else if (*p & 0x80) /* a negative number */
     212                 :            :                 {
     213                 :          0 :                 ret->type=V_ASN1_NEG_INTEGER;
     214 [ #  # ][ #  # ]:          0 :                 if ((*p == 0xff) && (len != 1)) {
     215                 :          0 :                         p++;
     216                 :          0 :                         len--;
     217                 :            :                 }
     218                 :          0 :                 i = len;
     219                 :          0 :                 p += i - 1;
     220                 :          0 :                 to += i - 1;
     221 [ #  # ][ #  # ]:          0 :                 while((!*p) && i) {
     222                 :          0 :                         *(to--) = 0;
     223                 :          0 :                         i--;
     224                 :          0 :                         p--;
     225                 :            :                 }
     226                 :            :                 /* Special case: if all zeros then the number will be of
     227                 :            :                  * the form FF followed by n zero bytes: this corresponds to
     228                 :            :                  * 1 followed by n zero bytes. We've already written n zeros
     229                 :            :                  * so we just append an extra one and set the first byte to
     230                 :            :                  * a 1. This is treated separately because it is the only case
     231                 :            :                  * where the number of bytes is larger than len.
     232                 :            :                  */
     233         [ #  # ]:          0 :                 if(!i) {
     234                 :          0 :                         *s = 1;
     235                 :          0 :                         s[len] = 0;
     236                 :          0 :                         len++;
     237                 :            :                 } else {
     238                 :          0 :                         *(to--) = (*(p--) ^ 0xff) + 1;
     239                 :          0 :                         i--;
     240         [ #  # ]:          0 :                         for(;i > 0; i--) *(to--) = *(p--) ^ 0xff;
     241                 :            :                 }
     242                 :            :         } else {
     243                 :      20368 :                 ret->type=V_ASN1_INTEGER;
     244 [ +  + ][ +  + ]:      20368 :                 if ((*p == 0) && (len != 1))
     245                 :            :                         {
     246                 :       7737 :                         p++;
     247                 :       7737 :                         len--;
     248                 :            :                         }
     249                 :      20368 :                 memcpy(s,p,(int)len);
     250                 :            :         }
     251                 :            : 
     252         [ -  + ]:      20368 :         if (ret->data != NULL) OPENSSL_free(ret->data);
     253                 :      20368 :         ret->data=s;
     254                 :      20368 :         ret->length=(int)len;
     255         [ +  - ]:      20368 :         if (a != NULL) (*a)=ret;
     256                 :      20368 :         *pp=pend;
     257                 :      20368 :         return(ret);
     258                 :            : err:
     259                 :          0 :         ASN1err(ASN1_F_C2I_ASN1_INTEGER,i);
     260 [ #  # ][ #  # ]:          0 :         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
                 [ #  # ]
     261                 :          0 :                 M_ASN1_INTEGER_free(ret);
     262                 :            :         return(NULL);
     263                 :            :         }
     264                 :            : 
     265                 :            : 
     266                 :            : /* This is a version of d2i_ASN1_INTEGER that ignores the sign bit of
     267                 :            :  * ASN1 integers: some broken software can encode a positive INTEGER
     268                 :            :  * with its MSB set as negative (it doesn't add a padding zero).
     269                 :            :  */
     270                 :            : 
     271                 :          0 : ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp,
     272                 :            :              long length)
     273                 :            :         {
     274                 :          0 :         ASN1_INTEGER *ret=NULL;
     275                 :            :         const unsigned char *p;
     276                 :            :         unsigned char *s;
     277                 :            :         long len;
     278                 :            :         int inf,tag,xclass;
     279                 :            :         int i;
     280                 :            : 
     281 [ #  # ][ #  # ]:          0 :         if ((a == NULL) || ((*a) == NULL))
     282                 :            :                 {
     283         [ #  # ]:          0 :                 if ((ret=M_ASN1_INTEGER_new()) == NULL) return(NULL);
     284                 :          0 :                 ret->type=V_ASN1_INTEGER;
     285                 :            :                 }
     286                 :            :         else
     287                 :            :                 ret=(*a);
     288                 :            : 
     289                 :          0 :         p= *pp;
     290                 :          0 :         inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
     291         [ #  # ]:          0 :         if (inf & 0x80)
     292                 :            :                 {
     293                 :            :                 i=ASN1_R_BAD_OBJECT_HEADER;
     294                 :            :                 goto err;
     295                 :            :                 }
     296                 :            : 
     297         [ #  # ]:          0 :         if (tag != V_ASN1_INTEGER)
     298                 :            :                 {
     299                 :            :                 i=ASN1_R_EXPECTING_AN_INTEGER;
     300                 :            :                 goto err;
     301                 :            :                 }
     302                 :            : 
     303                 :            :         /* We must OPENSSL_malloc stuff, even for 0 bytes otherwise it
     304                 :            :          * signifies a missing NULL parameter. */
     305                 :          0 :         s=(unsigned char *)OPENSSL_malloc((int)len+1);
     306         [ #  # ]:          0 :         if (s == NULL)
     307                 :            :                 {
     308                 :            :                 i=ERR_R_MALLOC_FAILURE;
     309                 :            :                 goto err;
     310                 :            :                 }
     311                 :          0 :         ret->type=V_ASN1_INTEGER;
     312         [ #  # ]:          0 :         if(len) {
     313 [ #  # ][ #  # ]:          0 :                 if ((*p == 0) && (len != 1))
     314                 :            :                         {
     315                 :          0 :                         p++;
     316                 :          0 :                         len--;
     317                 :            :                         }
     318                 :          0 :                 memcpy(s,p,(int)len);
     319                 :          0 :                 p+=len;
     320                 :            :         }
     321                 :            : 
     322         [ #  # ]:          0 :         if (ret->data != NULL) OPENSSL_free(ret->data);
     323                 :          0 :         ret->data=s;
     324                 :          0 :         ret->length=(int)len;
     325         [ #  # ]:          0 :         if (a != NULL) (*a)=ret;
     326                 :          0 :         *pp=p;
     327                 :          0 :         return(ret);
     328                 :            : err:
     329                 :          0 :         ASN1err(ASN1_F_D2I_ASN1_UINTEGER,i);
     330 [ #  # ][ #  # ]:          0 :         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
                 [ #  # ]
     331                 :          0 :                 M_ASN1_INTEGER_free(ret);
     332                 :            :         return(NULL);
     333                 :            :         }
     334                 :            : 
     335                 :      13854 : int ASN1_INTEGER_set(ASN1_INTEGER *a, long v)
     336                 :            :         {
     337                 :            :         int j,k;
     338                 :            :         unsigned int i;
     339                 :            :         unsigned char buf[sizeof(long)+1];
     340                 :            :         long d;
     341                 :            : 
     342                 :      13854 :         a->type=V_ASN1_INTEGER;
     343         [ +  + ]:      13854 :         if (a->length < (int)(sizeof(long)+1))
     344                 :            :                 {
     345         [ +  + ]:        748 :                 if (a->data != NULL)
     346                 :          3 :                         OPENSSL_free(a->data);
     347         [ +  - ]:        748 :                 if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
     348                 :        748 :                         memset((char *)a->data,0,sizeof(long)+1);
     349                 :            :                 }
     350         [ -  + ]:      13854 :         if (a->data == NULL)
     351                 :            :                 {
     352                 :          0 :                 ASN1err(ASN1_F_ASN1_INTEGER_SET,ERR_R_MALLOC_FAILURE);
     353                 :          0 :                 return(0);
     354                 :            :                 }
     355                 :      13854 :         d=v;
     356         [ -  + ]:      13854 :         if (d < 0)
     357                 :            :                 {
     358                 :          0 :                 d= -d;
     359                 :      13854 :                 a->type=V_ASN1_NEG_INTEGER;
     360                 :            :                 }
     361                 :            : 
     362         [ +  - ]:      44038 :         for (i=0; i<sizeof(long); i++)
     363                 :            :                 {
     364         [ +  + ]:      44038 :                 if (d == 0) break;
     365                 :      30184 :                 buf[i]=(int)d&0xff;
     366                 :      30184 :                 d>>=8;
     367                 :            :                 }
     368                 :      13854 :         j=0;
     369         [ +  + ]:      44038 :         for (k=i-1; k >=0; k--)
     370                 :      30184 :                 a->data[j++]=buf[k];
     371                 :      13854 :         a->length=j;
     372                 :      13854 :         return(1);
     373                 :            :         }
     374                 :            : 
     375                 :       8812 : long ASN1_INTEGER_get(const ASN1_INTEGER *a)
     376                 :            :         {
     377                 :       8812 :         int neg=0,i;
     378                 :       8812 :         long r=0;
     379                 :            : 
     380         [ +  + ]:       8812 :         if (a == NULL) return(0L);
     381                 :       8809 :         i=a->type;
     382         [ +  - ]:       8809 :         if (i == V_ASN1_NEG_INTEGER)
     383                 :            :                 neg=1;
     384         [ +  - ]:       8809 :         else if (i != V_ASN1_INTEGER)
     385                 :            :                 return -1;
     386                 :            :         
     387         [ +  - ]:       8809 :         if (a->length > (int)sizeof(long))
     388                 :            :                 {
     389                 :            :                 /* hmm... a bit ugly, return all ones */
     390                 :            :                 return -1;
     391                 :            :                 }
     392         [ +  - ]:       8809 :         if (a->data == NULL)
     393                 :            :                 return 0;
     394                 :            : 
     395         [ +  + ]:      22050 :         for (i=0; i<a->length; i++)
     396                 :            :                 {
     397                 :      13241 :                 r<<=8;
     398                 :      13241 :                 r|=(unsigned char)a->data[i];
     399                 :            :                 }
     400         [ -  + ]:       8809 :         if (neg) r= -r;
     401                 :       8809 :         return(r);
     402                 :            :         }
     403                 :            : 
     404                 :         32 : ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai)
     405                 :            :         {
     406                 :            :         ASN1_INTEGER *ret;
     407                 :            :         int len,j;
     408                 :            : 
     409         [ +  + ]:         32 :         if (ai == NULL)
     410                 :         18 :                 ret=M_ASN1_INTEGER_new();
     411                 :            :         else
     412                 :            :                 ret=ai;
     413         [ -  + ]:         32 :         if (ret == NULL)
     414                 :            :                 {
     415                 :          0 :                 ASN1err(ASN1_F_BN_TO_ASN1_INTEGER,ERR_R_NESTED_ASN1_ERROR);
     416                 :          0 :                 goto err;
     417                 :            :                 }
     418         [ -  + ]:         32 :         if (BN_is_negative(bn))
     419                 :          0 :                 ret->type = V_ASN1_NEG_INTEGER;
     420                 :         32 :         else ret->type=V_ASN1_INTEGER;
     421                 :         32 :         j=BN_num_bits(bn);
     422         [ +  + ]:         32 :         len=((j == 0)?0:((j/8)+1));
     423         [ +  - ]:         32 :         if (ret->length < len+4)
     424                 :            :                 {
     425                 :         32 :                 unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
     426         [ -  + ]:         32 :                 if (!new_data)
     427                 :            :                         {
     428                 :          0 :                         ASN1err(ASN1_F_BN_TO_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
     429                 :          0 :                         goto err;
     430                 :            :                         }
     431                 :         32 :                 ret->data=new_data;
     432                 :            :                 }
     433                 :         32 :         ret->length=BN_bn2bin(bn,ret->data);
     434                 :            :         /* Correct zero case */
     435         [ +  + ]:         32 :         if(!ret->length)
     436                 :            :                 {
     437                 :          2 :                 ret->data[0] = 0;
     438                 :          2 :                 ret->length = 1;
     439                 :            :                 }
     440                 :         32 :         return(ret);
     441                 :            : err:
     442         [ #  # ]:          0 :         if (ret != ai) M_ASN1_INTEGER_free(ret);
     443                 :            :         return(NULL);
     444                 :            :         }
     445                 :            : 
     446                 :        148 : BIGNUM *ASN1_INTEGER_to_BN(const ASN1_INTEGER *ai, BIGNUM *bn)
     447                 :            :         {
     448                 :            :         BIGNUM *ret;
     449                 :            : 
     450         [ -  + ]:        148 :         if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
     451                 :          0 :                 ASN1err(ASN1_F_ASN1_INTEGER_TO_BN,ASN1_R_BN_LIB);
     452         [ -  + ]:        148 :         else if(ai->type == V_ASN1_NEG_INTEGER)
     453                 :          0 :                 BN_set_negative(ret, 1);
     454                 :        148 :         return(ret);
     455                 :            :         }
     456                 :            : 
     457                 :            : IMPLEMENT_STACK_OF(ASN1_INTEGER)
     458                 :            : IMPLEMENT_ASN1_SET_OF(ASN1_INTEGER)

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