crypto/asn1/a_object.c

   1 /* crypto/asn1/a_object.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/buffer.h>
  62 #include <openssl/asn1.h>
  63 #include <openssl/objects.h>
  64
  65 /* ASN1err(ASN1_F_ASN1_OBJECT_NEW,ASN1_R_EXPECTING_AN_OBJECT);
  66  * ASN1err(ASN1_F_D2I_ASN1_OBJECT,ASN1_R_BAD_OBJECT_HEADER);
  67  * ASN1err(ASN1_F_I2T_ASN1_OBJECT,ASN1_R_BAD_OBJECT_HEADER);
  68  */
  69
  70 int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
  71         {
  72         unsigned char *p;
  73
  74         if ((a == NULL) || (a->data == NULL)) return(0);
  75
  76         if (pp == NULL)
  77                 return(ASN1_object_size(0,a->length,V_ASN1_OBJECT));
  78
  79         p= *pp;
  80         ASN1_put_object(&p,0,a->length,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
  81         memcpy(p,a->data,a->length);
  82         p+=a->length;
  83
  84         *pp=p;
  85         return(a->length);
  86         }
  87
  88 int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
  89         {
  90         int i,first,len=0,c;
  91         char tmp[24];
  92         const char *p;
  93         unsigned long l;
  94
  95         if (num == 0)
  96                 return(0);
  97         else if (num == -1)
  98                 num=strlen(buf);
  99
 100         p=buf;
 101         c= *(p++);
 102         num--;
 103         if ((c >= '0') && (c <= '2'))
 104                 {
 105                 first=(c-'0')*40;
 106                 }
 107         else
 108                 {
 109                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
 110                 goto err;
 111                 }
 112
 113         if (num <= 0)
 114                 {
 115                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
 116                 goto err;
 117                 }
 118         c= *(p++);
 119         num--;
 120         for (;;)
 121                 {
 122                 if (num <= 0) break;
 123                 if ((c != '.') && (c != ' '))
 124                         {
 125                         ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
 126                         goto err;
 127                         }
 128                 l=0;
 129                 for (;;)
 130                         {
 131                         if (num <= 0) break;
 132                         num--;
 133                         c= *(p++);
 134                         if ((c == ' ') || (c == '.'))
 135                                 break;
 136                         if ((c < '0') || (c > '9'))
 137                                 {
 138                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
 139                                 goto err;
 140                                 }
 141                         l=l*10L+(long)(c-'0');
 142                         }
 143                 if (len == 0)
 144                         {
 145                         if ((first < 2) && (l >= 40))
 146                                 {
 147                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
 148                                 goto err;
 149                                 }
 150                         l+=(long)first;
 151                         }
 152                 i=0;
 153                 for (;;)
 154                         {
 155                         tmp[i++]=(unsigned char)l&0x7f;
 156                         l>>=7L;
 157                         if (l == 0L) break;
 158                         }
 159                 if (out != NULL)
 160                         {
 161                         if (len+i > olen)
 162                                 {
 163                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
 164                                 goto err;
 165                                 }
 166                         while (--i > 0)
 167                                 out[len++]=tmp[i]|0x80;
 168                         out[len++]=tmp[0];
 169                         }
 170                 else
 171                         len+=i;
 172                 }
 173         return(len);
 174 err:
 175         return(0);
 176         }
 177
 178 int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
 179         {
 180         int i,idx=0,n=0,len,nid;
 181         unsigned long l;
 182         unsigned char *p;
 183         const char *s;
 184         char tbuf[32];
 185
 186         if (buf_len <= 0) return(0);
 187
 188         if ((a == NULL) || (a->data == NULL))
 189                 {
 190                 buf[0]='\0';
 191                 return(0);
 192                 }
 193
 194         nid=OBJ_obj2nid(a);
 195         if (nid == NID_undef)
 196                 {
 197                 len=a->length;
 198                 p=a->data;
 199
 200                 idx=0;
 201                 l=0;
 202                 while (idx < a->length)
 203                         {
 204                         l|=(p[idx]&0x7f);
 205                         if (!(p[idx] & 0x80)) break;
 206                         l<<=7L;
 207                         idx++;
 208                         }
 209                 idx++;
 210                 i=(int)(l/40);
 211                 if (i > 2) i=2;
 212                 l-=(long)(i*40);
 213
 214                 sprintf(tbuf,"%d.%ld",i,l);
 215                 i=strlen(tbuf);
 216                 strncpy(buf,tbuf,buf_len);
 217                 buf_len-=i;
 218                 buf+=i;
 219                 n+=i;
 220
 221                 l=0;
 222                 for (; idx<len; idx++)
 223                         {
 224                         l|=p[idx]&0x7f;
 225                         if (!(p[idx] & 0x80))
 226                                 {
 227                                 sprintf(tbuf,".%ld",l);
 228                                 i=strlen(tbuf);
 229                                 if (buf_len > 0)
 230                                         strncpy(buf,tbuf,buf_len);
 231                                 buf_len-=i;
 232                                 buf+=i;
 233                                 n+=i;
 234                                 l=0;
 235                                 }
 236                         l<<=7L;
 237                         }
 238                 }
 239         else
 240                 {
 241                 s=OBJ_nid2ln(nid);
 242                 if (s == NULL)
 243                         s=OBJ_nid2sn(nid);
 244                 strncpy(buf,s,buf_len);
 245                 n=strlen(s);
 246                 }
 247         buf[buf_len-1]='\0';
 248         return(n);
 249         }
 250
 251 int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
 252         {
 253         char buf[80];
 254         int i;
 255
 256         if ((a == NULL) || (a->data == NULL))
 257                 return(BIO_write(bp,"NULL",4));
 258         i=i2t_ASN1_OBJECT(buf,80,a);
 259         if (i > 80) i=80;
 260         BIO_write(bp,buf,i);
 261         return(i);
 262         }
 263
 264 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, unsigned char **pp,
 265              long length)
 266         {
 267         ASN1_OBJECT *ret=NULL;
 268         unsigned char *p;
 269         long len;
 270         int tag,xclass;
 271         int inf,i;
 272
 273         /* only the ASN1_OBJECTs from the 'table' will have values
 274          * for ->sn or ->ln */
 275         if ((a == NULL) || ((*a) == NULL) ||
 276                 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC))
 277                 {
 278                 if ((ret=ASN1_OBJECT_new()) == NULL) return(NULL);
 279                 }
 280         else    ret=(*a);
 281
 282         p= *pp;
 283
 284         inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
 285         if (inf & 0x80)
 286                 {
 287                 i=ASN1_R_BAD_OBJECT_HEADER;
 288                 goto err;
 289                 }
 290
 291         if (tag != V_ASN1_OBJECT)
 292                 {
 293                 i=ASN1_R_EXPECTING_AN_OBJECT;
 294                 goto err;
 295                 }
 296         if ((ret->data == NULL) || (ret->length < len))
 297                 {
 298                 if (ret->data != NULL) Free((char *)ret->data);
 299                 ret->data=(unsigned char *)Malloc((int)len);
 300                 ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 301                 if (ret->data == NULL)
 302                         { i=ERR_R_MALLOC_FAILURE; goto err; }
 303                 }
 304         memcpy(ret->data,p,(int)len);
 305         ret->length=(int)len;
 306         ret->sn=NULL;
 307         ret->ln=NULL;
 308         /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
 309         p+=len;
 310
 311         if (a != NULL) (*a)=ret;
 312         *pp=p;
 313         return(ret);
 314 err:
 315         ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
 316         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 317                 ASN1_OBJECT_free(ret);
 318         return(NULL);
 319         }
 320
 321 ASN1_OBJECT *ASN1_OBJECT_new(void)
 322         {
 323         ASN1_OBJECT *ret;
 324
 325         ret=(ASN1_OBJECT *)Malloc(sizeof(ASN1_OBJECT));
 326         if (ret == NULL)
 327                 {
 328                 ASN1err(ASN1_F_ASN1_OBJECT_NEW,ERR_R_MALLOC_FAILURE);
 329                 return(NULL);
 330                 }
 331         ret->length=0;
 332         ret->data=NULL;
 333         ret->nid=0;
 334         ret->sn=NULL;
 335         ret->ln=NULL;
 336         ret->flags=ASN1_OBJECT_FLAG_DYNAMIC;
 337         return(ret);
 338         }
 339
 340 void ASN1_OBJECT_free(ASN1_OBJECT *a)
 341         {
 342         if (a == NULL) return;
 343         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS)
 344                 {
 345 #ifndef CONST_STRICT /* disable purely for compile-time strict const checking. Doing this on a "real" compile will cause mempory leaks */
 346                 if (a->sn != NULL) Free((void *)a->sn);
 347                 if (a->ln != NULL) Free((void *)a->ln);
 348 #endif
 349                 a->sn=a->ln=NULL;
 350                 }
 351         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA)
 352                 {
 353                 if (a->data != NULL) Free(a->data);
 354                 a->data=NULL;
 355                 a->length=0;
 356                 }
 357         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
 358                 Free(a);
 359         }
 360
 361 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
 362              char *sn, char *ln)
 363         {
 364         ASN1_OBJECT o;
 365
 366         o.sn=sn;
 367         o.ln=ln;
 368         o.data=data;
 369         o.nid=nid;
 370         o.length=len;
 371         o.flags=ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
 372                 ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 373         return(OBJ_dup(&o));
 374         }
 375