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 <limits.h>
  61 #include "cryptlib.h"
  62 #include <openssl/buffer.h>
  63 #include <openssl/asn1.h>
  64 #include <openssl/objects.h>
  65 #include <openssl/bn.h>
  66
  67 int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
  68         {
  69         unsigned char *p;
  70         int objsize;
  71
  72         if ((a == NULL) || (a->data == NULL)) return(0);
  73
  74         objsize = ASN1_object_size(0,a->length,V_ASN1_OBJECT);
  75         if (pp == NULL) return objsize;
  76
  77         p= *pp;
  78         ASN1_put_object(&p,0,a->length,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
  79         memcpy(p,a->data,a->length);
  80         p+=a->length;
  81
  82         *pp=p;
  83         return(objsize);
  84         }
  85
  86 size_t a2d_ASN1_OBJECT(unsigned char *out, size_t olen, const char *buf,
  87                        int num)
  88         {
  89         int i,len=0,c, use_bn;
  90         unsigned first;
  91         char ftmp[24], *tmp = ftmp;
  92         size_t tmpsize = sizeof ftmp;
  93         const char *p;
  94         unsigned long l;
  95         BIGNUM *bl = NULL;
  96
  97         if (num == 0)
  98                 return(0);
  99         else if (num == -1)
 100                 num=strlen(buf);
 101
 102         p=buf;
 103         c= *(p++);
 104         num--;
 105         if ((c >= '0') && (c <= '2'))
 106                 {
 107                 first= c-'0';
 108                 }
 109         else
 110                 {
 111                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
 112                 goto err;
 113                 }
 114
 115         if (num <= 0)
 116                 {
 117                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
 118                 goto err;
 119                 }
 120         c= *(p++);
 121         num--;
 122         for (;;)
 123                 {
 124                 if (num <= 0) break;
 125                 if ((c != '.') && (c != ' '))
 126                         {
 127                         ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
 128                         goto err;
 129                         }
 130                 l=0;
 131                 use_bn = 0;
 132                 for (;;)
 133                         {
 134                         if (num <= 0) break;
 135                         num--;
 136                         c= *(p++);
 137                         if ((c == ' ') || (c == '.'))
 138                                 break;
 139                         if ((c < '0') || (c > '9'))
 140                                 {
 141                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
 142                                 goto err;
 143                                 }
 144                         if (!use_bn && l > (ULONG_MAX / 10L))
 145                                 {
 146                                 use_bn = 1;
 147                                 if (!bl)
 148                                         bl = BN_new();
 149                                 if (!bl || !BN_set_word(bl, l))
 150                                         goto err;
 151                                 }
 152                         if (use_bn)
 153                                 {
 154                                 if (!BN_mul_word(bl, 10L)
 155                                     || !BN_add_signed_word(bl, c-'0'))
 156                                         goto err;
 157                                 }
 158                         else
 159                                 l=l*10L+(c-'0');
 160                         }
 161                 if (len == 0)
 162                         {
 163                         if ((first < 2) && (l >= 40))
 164                                 {
 165                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
 166                                 goto err;
 167                                 }
 168                         if (use_bn)
 169                                 {
 170                                 if (!BN_add_word(bl, first * 40))
 171                                         goto err;
 172                                 }
 173                         else
 174                                 l+=(long)first*40;
 175                         }
 176                 i=0;
 177                 if (use_bn)
 178                         {
 179                         int blsize;
 180                         blsize = BN_num_bits(bl);
 181                         blsize = (blsize + 6)/7;
 182                         if (blsize > tmpsize)
 183                                 {
 184                                 if (tmp != ftmp)
 185                                         OPENSSL_free(tmp);
 186                                 tmpsize = blsize + 32;
 187                                 tmp = OPENSSL_malloc(tmpsize);
 188                                 if (!tmp)
 189                                         goto err;
 190                                 }
 191                         while(blsize--)
 192                                 tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
 193                         }
 194                 else
 195                         {
 196
 197                         for (;;)
 198                                 {
 199                                 tmp[i++]=(unsigned char)l&0x7f;
 200                                 l>>=7L;
 201                                 if (l == 0L) break;
 202                                 }
 203
 204                         }
 205                 if (out != NULL)
 206                         {
 207                         if (len+i > olen)
 208                                 {
 209                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
 210                                 goto err;
 211                                 }
 212                         while (--i > 0)
 213                                 out[len++]=tmp[i]|0x80;
 214                         out[len++]=tmp[0];
 215                         }
 216                 else
 217                         len+=i;
 218                 }
 219         if (tmp != ftmp)
 220                 OPENSSL_free(tmp);
 221         if (bl)
 222                 BN_free(bl);
 223         return(len);
 224 err:
 225         if (tmp != ftmp)
 226                 OPENSSL_free(tmp);
 227         if (bl)
 228                 BN_free(bl);
 229         return(0);
 230         }
 231
 232 int i2t_ASN1_OBJECT(char *buf, size_t buf_len, ASN1_OBJECT *a)
 233 {
 234         return OBJ_obj2txt(buf, buf_len, a, 0);
 235 }
 236
 237 int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
 238         {
 239         char buf[80], *p = buf;
 240         size_t i;
 241
 242         if ((a == NULL) || (a->data == NULL))
 243                 return(BIO_write(bp,"NULL",4));
 244         i=i2t_ASN1_OBJECT(buf,sizeof buf,a);
 245         if (i > (int)(sizeof(buf) - 1))
 246                 {
 247                 p = OPENSSL_malloc(i + 1);
 248                 if (!p)
 249                         return -1;
 250                 i2t_ASN1_OBJECT(p,i + 1,a);
 251                 }
 252         if (i <= 0)
 253                 return BIO_write(bp, "<INVALID>", 9);
 254         BIO_write(bp,p,i);
 255         if (p != buf)
 256                 OPENSSL_free(p);
 257         return(i);
 258         }
 259
 260 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
 261                              size_t length)
 262 {
 263         const unsigned char *p;
 264         size_t len;
 265         int tag,xclass;
 266         int inf,i;
 267         ASN1_OBJECT *ret = NULL;
 268
 269         p= *pp;
 270         inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
 271         if (inf & 0x80)
 272                 {
 273                 i=ASN1_R_BAD_OBJECT_HEADER;
 274                 goto err;
 275                 }
 276
 277         if (tag != V_ASN1_OBJECT)
 278                 {
 279                 i=ASN1_R_EXPECTING_AN_OBJECT;
 280                 goto err;
 281                 }
 282         ret = c2i_ASN1_OBJECT(a, &p, len);
 283         if(ret) *pp = p;
 284         return ret;
 285 err:
 286         ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
 287         return(NULL);
 288 }
 289 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
 290                              size_t len)
 291         {
 292         ASN1_OBJECT *ret=NULL;
 293         const unsigned char *p;
 294         unsigned char *data;
 295         int i;
 296
 297         /* only the ASN1_OBJECTs from the 'table' will have values
 298          * for ->sn or ->ln */
 299         if ((a == NULL) || ((*a) == NULL) ||
 300                 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC))
 301                 {
 302                 if ((ret=ASN1_OBJECT_new()) == NULL) return(NULL);
 303                 }
 304         else    ret=(*a);
 305
 306         p= *pp;
 307         /* detach data from object */
 308         data = (unsigned char *)ret->data;
 309         ret->data = NULL;
 310         /* once detached we can change it */
 311         if ((data == NULL) || (ret->length < len))
 312                 {
 313                 ret->length=0;
 314                 if (data != NULL) OPENSSL_free(data);
 315                 data=OPENSSL_malloc(len ? len : 1);
 316                 if (data == NULL)
 317                         { i=ERR_R_MALLOC_FAILURE; goto err; }
 318                 ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 319                 }
 320         memcpy(data,p,len);
 321         /* reattach data to object, after which it remains const */
 322         ret->data=data;
 323         ret->length=len;
 324         ret->sn=NULL;
 325         ret->ln=NULL;
 326         /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
 327         p+=len;
 328
 329         if (a != NULL) (*a)=ret;
 330         *pp=p;
 331         return(ret);
 332 err:
 333         ASN1err(ASN1_F_C2I_ASN1_OBJECT,i);
 334         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 335                 ASN1_OBJECT_free(ret);
 336         return(NULL);
 337         }
 338
 339 ASN1_OBJECT *ASN1_OBJECT_new(void)
 340         {
 341         ASN1_OBJECT *ret;
 342
 343         ret=(ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
 344         if (ret == NULL)
 345                 {
 346                 ASN1err(ASN1_F_ASN1_OBJECT_NEW,ERR_R_MALLOC_FAILURE);
 347                 return(NULL);
 348                 }
 349         ret->length=0;
 350         ret->data=NULL;
 351         ret->nid=0;
 352         ret->sn=NULL;
 353         ret->ln=NULL;
 354         ret->flags=ASN1_OBJECT_FLAG_DYNAMIC;
 355         return(ret);
 356         }
 357
 358 void ASN1_OBJECT_free(ASN1_OBJECT *a)
 359         {
 360         if (a == NULL) return;
 361         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS)
 362                 {
 363 #ifndef CONST_STRICT /* disable purely for compile-time strict const checking. Doing this on a "real" compile will cause memory leaks */
 364                 if (a->sn != NULL) OPENSSL_free((void *)a->sn);
 365                 if (a->ln != NULL) OPENSSL_free((void *)a->ln);
 366 #endif
 367                 a->sn=a->ln=NULL;
 368                 }
 369         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA)
 370                 {
 371                 if (a->data != NULL) OPENSSL_free((void *)a->data);
 372                 a->data=NULL;
 373                 a->length=0;
 374                 }
 375         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
 376                 OPENSSL_free(a);
 377         }
 378
 379 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, size_t len,
 380              const char *sn, const char *ln)
 381         {
 382         ASN1_OBJECT o;
 383
 384         o.sn=sn;
 385         o.ln=ln;
 386         o.data=data;
 387         o.nid=nid;
 388         o.length=len;
 389         o.flags=ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
 390                 ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 391         return(OBJ_dup(&o));
 392         }
 393
 394 IMPLEMENT_STACK_OF(ASN1_OBJECT)
 395 IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT)