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 "buffer.h"
  62 #include "asn1.h"
  63 #include "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(a, pp)
  71 ASN1_OBJECT *a;
  72 unsigned char **pp;
  73         {
  74         unsigned char *p;
  75
  76         if ((a == NULL) || (a->data == NULL)) return(0);
  77
  78         if (pp == NULL)
  79                 return(ASN1_object_size(0,a->length,V_ASN1_OBJECT));
  80
  81         p= *pp;
  82         ASN1_put_object(&p,0,a->length,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
  83         memcpy(p,a->data,a->length);
  84         p+=a->length;
  85
  86         *pp=p;
  87         return(a->length);
  88         }
  89
  90 int a2d_ASN1_OBJECT(out,olen,buf,num)
  91 unsigned char *out;
  92 int olen;
  93 const char *buf;
  94 int num;
  95         {
  96         int i,first,len=0,c;
  97         char tmp[24];
  98         const char *p;
  99         unsigned long l;
 100
 101         if (num == 0)
 102                 return(0);
 103         else if (num == -1)
 104                 num=strlen(buf);
 105
 106         p=buf;
 107         c= *(p++);
 108         num--;
 109         if ((c >= '0') && (c <= '2'))
 110                 {
 111                 first=(c-'0')*40;
 112                 }
 113         else
 114                 {
 115                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
 116                 goto err;
 117                 }
 118
 119         if (num <= 0)
 120                 {
 121                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
 122                 goto err;
 123                 }
 124         c= *(p++);
 125         num--;
 126         for (;;)
 127                 {
 128                 if (num <= 0) break;
 129                 if ((c != '.') && (c != ' '))
 130                         {
 131                         ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
 132                         goto err;
 133                         }
 134                 l=0;
 135                 for (;;)
 136                         {
 137                         if (num <= 0) break;
 138                         num--;
 139                         c= *(p++);
 140                         if ((c == ' ') || (c == '.'))
 141                                 break;
 142                         if ((c < '0') || (c > '9'))
 143                                 {
 144                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
 145                                 goto err;
 146                                 }
 147                         l=l*10L+(long)(c-'0');
 148                         }
 149                 if (len == 0)
 150                         {
 151                         if ((first < 2) && (l >= 40))
 152                                 {
 153                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
 154                                 goto err;
 155                                 }
 156                         l+=(long)first;
 157                         }
 158                 i=0;
 159                 for (;;)
 160                         {
 161                         tmp[i++]=(unsigned char)l&0x7f;
 162                         l>>=7L;
 163                         if (l == 0L) break;
 164                         }
 165                 if (out != NULL)
 166                         {
 167                         if (len+i > olen)
 168                                 {
 169                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
 170                                 goto err;
 171                                 }
 172                         while (--i > 0)
 173                                 out[len++]=tmp[i]|0x80;
 174                         out[len++]=tmp[0];
 175                         }
 176                 else
 177                         len+=i;
 178                 }
 179         return(len);
 180 err:
 181         return(0);
 182         }
 183
 184 int i2t_ASN1_OBJECT(buf,buf_len,a)
 185 char *buf;
 186 int buf_len;
 187 ASN1_OBJECT *a;
 188         {
 189         int i,idx=0,n=0,len,nid;
 190         unsigned long l;
 191         unsigned char *p;
 192         const char *s;
 193         char tbuf[32];
 194
 195         if (buf_len <= 0) return(0);
 196
 197         if ((a == NULL) || (a->data == NULL))
 198                 {
 199                 buf[0]='\0';
 200                 return(0);
 201                 }
 202
 203         nid=OBJ_obj2nid(a);
 204         if (nid == NID_undef)
 205                 {
 206                 len=a->length;
 207                 p=a->data;
 208
 209                 idx=0;
 210                 l=0;
 211                 while (idx < a->length)
 212                         {
 213                         l|=(p[idx]&0x7f);
 214                         if (!(p[idx] & 0x80)) break;
 215                         l<<=7L;
 216                         idx++;
 217                         }
 218                 idx++;
 219                 i=(int)(l/40);
 220                 if (i > 2) i=2;
 221                 l-=(long)(i*40);
 222
 223                 sprintf(tbuf,"%d.%ld",i,l);
 224                 i=strlen(tbuf);
 225                 strncpy(buf,tbuf,buf_len);
 226                 buf_len-=i;
 227                 buf+=i;
 228                 n+=i;
 229
 230                 l=0;
 231                 for (; idx<len; idx++)
 232                         {
 233                         l|=p[idx]&0x7f;
 234                         if (!(p[idx] & 0x80))
 235                                 {
 236                                 sprintf(tbuf,".%ld",l);
 237                                 i=strlen(tbuf);
 238                                 if (buf_len > 0)
 239                                         strncpy(buf,tbuf,buf_len);
 240                                 buf_len-=i;
 241                                 buf+=i;
 242                                 n+=i;
 243                                 l=0;
 244                                 }
 245                         l<<=7L;
 246                         }
 247                 }
 248         else
 249                 {
 250                 s=OBJ_nid2ln(nid);
 251                 if (s == NULL)
 252                         s=OBJ_nid2sn(nid);
 253                 strncpy(buf,s,buf_len);
 254                 n=strlen(s);
 255                 }
 256         buf[buf_len-1]='\0';
 257         return(n);
 258         }
 259
 260 int i2a_ASN1_OBJECT(bp,a)
 261 BIO *bp;
 262 ASN1_OBJECT *a;
 263         {
 264         char buf[80];
 265         int i;
 266
 267         if ((a == NULL) || (a->data == NULL))
 268                 return(BIO_write(bp,"NULL",4));
 269         i=i2t_ASN1_OBJECT(buf,80,a);
 270         if (i > 80) i=80;
 271         BIO_write(bp,buf,i);
 272         return(i);
 273         }
 274
 275 ASN1_OBJECT *d2i_ASN1_OBJECT(a, pp, length)
 276 ASN1_OBJECT **a;
 277 unsigned char **pp;
 278 long length;
 279         {
 280         ASN1_OBJECT *ret=NULL;
 281         unsigned char *p;
 282         long len;
 283         int tag,xclass;
 284         int inf,i;
 285
 286         /* only the ASN1_OBJECTs from the 'table' will have values
 287          * for ->sn or ->ln */
 288         if ((a == NULL) || ((*a) == NULL) ||
 289                 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC))
 290                 {
 291                 if ((ret=ASN1_OBJECT_new()) == NULL) return(NULL);
 292                 }
 293         else    ret=(*a);
 294
 295         p= *pp;
 296
 297         inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
 298         if (inf & 0x80)
 299                 {
 300                 i=ASN1_R_BAD_OBJECT_HEADER;
 301                 goto err;
 302                 }
 303
 304         if (tag != V_ASN1_OBJECT)
 305                 {
 306                 i=ASN1_R_EXPECTING_AN_OBJECT;
 307                 goto err;
 308                 }
 309         if ((ret->data == NULL) || (ret->length < len))
 310                 {
 311                 if (ret->data != NULL) Free((char *)ret->data);
 312                 ret->data=(unsigned char *)Malloc((int)len);
 313                 ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 314                 if (ret->data == NULL)
 315                         { i=ERR_R_MALLOC_FAILURE; goto err; }
 316                 }
 317         memcpy(ret->data,p,(int)len);
 318         ret->length=(int)len;
 319         ret->sn=NULL;
 320         ret->ln=NULL;
 321         /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
 322         p+=len;
 323
 324         if (a != NULL) (*a)=ret;
 325         *pp=p;
 326         return(ret);
 327 err:
 328         ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
 329         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 330                 ASN1_OBJECT_free(ret);
 331         return(NULL);
 332         }
 333
 334 ASN1_OBJECT *ASN1_OBJECT_new()
 335         {
 336         ASN1_OBJECT *ret;
 337
 338         ret=(ASN1_OBJECT *)Malloc(sizeof(ASN1_OBJECT));
 339         if (ret == NULL)
 340                 {
 341                 ASN1err(ASN1_F_ASN1_OBJECT_NEW,ERR_R_MALLOC_FAILURE);
 342                 return(NULL);
 343                 }
 344         ret->length=0;
 345         ret->data=NULL;
 346         ret->nid=0;
 347         ret->sn=NULL;
 348         ret->ln=NULL;
 349         ret->flags=ASN1_OBJECT_FLAG_DYNAMIC;
 350         return(ret);
 351         }
 352
 353 void ASN1_OBJECT_free(a)
 354 ASN1_OBJECT *a;
 355         {
 356         if (a == NULL) return;
 357         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS)
 358                 {
 359 #ifndef CONST_STRICT /* disable purely for compile-time strict const checking. Doing this on a "real" compile will cause mempory leaks */
 360                 if (a->sn != NULL) Free((void *)a->sn);
 361                 if (a->ln != NULL) Free((void *)a->ln);
 362 #endif
 363                 a->sn=a->ln=NULL;
 364                 }
 365         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA)
 366                 {
 367                 if (a->data != NULL) Free(a->data);
 368                 a->data=NULL;
 369                 a->length=0;
 370                 }
 371         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
 372                 Free(a);
 373         }
 374
 375 ASN1_OBJECT *ASN1_OBJECT_create(nid,data,len,sn,ln)
 376 int nid;
 377 unsigned char *data;
 378 int len;
 379 char *sn,*ln;
 380         {
 381         ASN1_OBJECT o;
 382
 383         o.sn=sn;
 384         o.ln=ln;
 385         o.data=data;
 386         o.nid=nid;
 387         o.length=len;
 388         o.flags=ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
 389                 ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 390         return(OBJ_dup(&o));
 391         }
 392