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