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 int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
  87         {
  88         int i,first,len=0,c, use_bn;
  89         char ftmp[24], *tmp = ftmp;
  90         int tmpsize = sizeof ftmp;
  91         const char *p;
  92         unsigned long l;
  93         BIGNUM *bl = NULL;
  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';
 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                 use_bn = 0;
 130                 for (;;)
 131                         {
 132                         if (num <= 0) break;
 133                         num--;
 134                         c= *(p++);
 135                         if ((c == ' ') || (c == '.'))
 136                                 break;
 137                         if ((c < '0') || (c > '9'))
 138                                 {
 139                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
 140                                 goto err;
 141                                 }
 142                         if (!use_bn && l >= ((ULONG_MAX - 80) / 10L))
 143                                 {
 144                                 use_bn = 1;
 145                                 if (!bl)
 146                                         bl = BN_new();
 147                                 if (!bl || !BN_set_word(bl, l))
 148                                         goto err;
 149                                 }
 150                         if (use_bn)
 151                                 {
 152                                 if (!BN_mul_word(bl, 10L)
 153                                         || !BN_add_word(bl, c-'0'))
 154                                         goto err;
 155                                 }
 156                         else
 157                                 l=l*10L+(long)(c-'0');
 158                         }
 159                 if (len == 0)
 160                         {
 161                         if ((first < 2) && (l >= 40))
 162                                 {
 163                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
 164                                 goto err;
 165                                 }
 166                         if (use_bn)
 167                                 {
 168                                 if (!BN_add_word(bl, first * 40))
 169                                         goto err;
 170                                 }
 171                         else
 172                                 l+=(long)first*40;
 173                         }
 174                 i=0;
 175                 if (use_bn)
 176                         {
 177                         int blsize;
 178                         blsize = BN_num_bits(bl);
 179                         blsize = (blsize + 6)/7;
 180                         if (blsize > tmpsize)
 181                                 {
 182                                 if (tmp != ftmp)
 183                                         OPENSSL_free(tmp);
 184                                 tmpsize = blsize + 32;
 185                                 tmp = OPENSSL_malloc(tmpsize);
 186                                 if (!tmp)
 187                                         goto err;
 188                                 }
 189                         while(blsize--)
 190                                 tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
 191                         }
 192                 else
 193                         {
 194
 195                         for (;;)
 196                                 {
 197                                 tmp[i++]=(unsigned char)l&0x7f;
 198                                 l>>=7L;
 199                                 if (l == 0L) break;
 200                                 }
 201
 202                         }
 203                 if (out != NULL)
 204                         {
 205                         if (len+i > olen)
 206                                 {
 207                                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
 208                                 goto err;
 209                                 }
 210                         while (--i > 0)
 211                                 out[len++]=tmp[i]|0x80;
 212                         out[len++]=tmp[0];
 213                         }
 214                 else
 215                         len+=i;
 216                 }
 217         if (tmp != ftmp)
 218                 OPENSSL_free(tmp);
 219         if (bl)
 220                 BN_free(bl);
 221         return(len);
 222 err:
 223         if (tmp != ftmp)
 224                 OPENSSL_free(tmp);
 225         if (bl)
 226                 BN_free(bl);
 227         return(0);
 228         }
 229
 230 int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
 231 {
 232         return OBJ_obj2txt(buf, buf_len, a, 0);
 233 }
 234
 235 int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
 236         {
 237         char buf[80], *p = buf;
 238         int i;
 239
 240         if ((a == NULL) || (a->data == NULL))
 241                 return(BIO_write(bp,"NULL",4));
 242         i=i2t_ASN1_OBJECT(buf,sizeof buf,a);
 243         if (i > (int)(sizeof(buf) - 1))
 244                 {
 245                 p = OPENSSL_malloc(i + 1);
 246                 if (!p)
 247                         return -1;
 248                 i2t_ASN1_OBJECT(p,i + 1,a);
 249                 }
 250         if (i <= 0)
 251                 return BIO_write(bp, "<INVALID>", 9);
 252         BIO_write(bp,p,i);
 253         if (p != buf)
 254                 OPENSSL_free(p);
 255         return(i);
 256         }
 257
 258 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
 259              long length)
 260 {
 261         const unsigned char *p;
 262         long len;
 263         int tag,xclass;
 264         int inf,i;
 265         ASN1_OBJECT *ret = NULL;
 266         p= *pp;
 267         inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
 268         if (inf & 0x80)
 269                 {
 270                 i=ASN1_R_BAD_OBJECT_HEADER;
 271                 goto err;
 272                 }
 273
 274         if (tag != V_ASN1_OBJECT)
 275                 {
 276                 i=ASN1_R_EXPECTING_AN_OBJECT;
 277                 goto err;
 278                 }
 279         ret = c2i_ASN1_OBJECT(a, &p, len);
 280         if(ret) *pp = p;
 281         return ret;
 282 err:
 283         ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
 284         return(NULL);
 285 }
 286 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
 287              long len)
 288         {
 289         ASN1_OBJECT *ret=NULL;
 290         const unsigned char *p;
 291         unsigned char *data;
 292         int i;
 293         /* Sanity check OID encoding: can't have leading 0x80 in
 294          * subidentifiers, see: X.690 8.19.2
 295          */
 296         for (i = 0, p = *pp; i < len; i++, p++)
 297                 {
 298                 if (*p == 0x80 && (!i || !(p[-1] & 0x80)))
 299                         {
 300                         ASN1err(ASN1_F_C2I_ASN1_OBJECT,ASN1_R_INVALID_OBJECT_ENCODING);
 301                         return NULL;
 302                         }
 303                 }
 304
 305         /* only the ASN1_OBJECTs from the 'table' will have values
 306          * for ->sn or ->ln */
 307         if ((a == NULL) || ((*a) == NULL) ||
 308                 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC))
 309                 {
 310                 if ((ret=ASN1_OBJECT_new()) == NULL) return(NULL);
 311                 }
 312         else    ret=(*a);
 313
 314         p= *pp;
 315         /* detach data from object */
 316         data = (unsigned char *)ret->data;
 317         ret->data = NULL;
 318         /* once detached we can change it */
 319         if ((data == NULL) || (ret->length < len))
 320                 {
 321                 ret->length=0;
 322                 if (data != NULL) OPENSSL_free(data);
 323                 data=(unsigned char *)OPENSSL_malloc(len ? (int)len : 1);
 324                 if (data == NULL)
 325                         { i=ERR_R_MALLOC_FAILURE; goto err; }
 326                 ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 327                 }
 328         memcpy(data,p,(int)len);
 329         /* reattach data to object, after which it remains const */
 330         ret->data  =data;
 331         ret->length=(int)len;
 332         ret->sn=NULL;
 333         ret->ln=NULL;
 334         /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
 335         p+=len;
 336
 337         if (a != NULL) (*a)=ret;
 338         *pp=p;
 339         return(ret);
 340 err:
 341         ASN1err(ASN1_F_C2I_ASN1_OBJECT,i);
 342         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 343                 ASN1_OBJECT_free(ret);
 344         return(NULL);
 345         }
 346
 347 ASN1_OBJECT *ASN1_OBJECT_new(void)
 348         {
 349         ASN1_OBJECT *ret;
 350
 351         ret=(ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
 352         if (ret == NULL)
 353                 {
 354                 ASN1err(ASN1_F_ASN1_OBJECT_NEW,ERR_R_MALLOC_FAILURE);
 355                 return(NULL);
 356                 }
 357         ret->length=0;
 358         ret->data=NULL;
 359         ret->nid=0;
 360         ret->sn=NULL;
 361         ret->ln=NULL;
 362         ret->flags=ASN1_OBJECT_FLAG_DYNAMIC;
 363         return(ret);
 364         }
 365
 366 void ASN1_OBJECT_free(ASN1_OBJECT *a)
 367         {
 368         if (a == NULL) return;
 369         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS)
 370                 {
 371 #ifndef CONST_STRICT /* disable purely for compile-time strict const checking. Doing this on a "real" compile will cause memory leaks */
 372                 if (a->sn != NULL) OPENSSL_free((void *)a->sn);
 373                 if (a->ln != NULL) OPENSSL_free((void *)a->ln);
 374 #endif
 375                 a->sn=a->ln=NULL;
 376                 }
 377         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA)
 378                 {
 379                 if (a->data != NULL) OPENSSL_free((void *)a->data);
 380                 a->data=NULL;
 381                 a->length=0;
 382                 }
 383         if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
 384                 OPENSSL_free(a);
 385         }
 386
 387 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
 388              const char *sn, const char *ln)
 389         {
 390         ASN1_OBJECT o;
 391
 392         o.sn=sn;
 393         o.ln=ln;
 394         o.data=data;
 395         o.nid=nid;
 396         o.length=len;
 397         o.flags=ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
 398                 ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 399         return(OBJ_dup(&o));
 400         }
 401
 402 IMPLEMENT_STACK_OF(ASN1_OBJECT)
 403 IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT)