release/src/router/openssl/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))
  73         return (0);
  74
  75     objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
  76     if (pp == NULL)
  77         return objsize;
  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 (objsize);
  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, use_bn;
  91     char ftmp[24], *tmp = ftmp;
  92     int 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         first = c - '0';
 107     } else {
 108         ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_FIRST_NUM_TOO_LARGE);
 109         goto err;
 110     }
 111
 112     if (num <= 0) {
 113         ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_MISSING_SECOND_NUMBER);
 114         goto err;
 115     }
 116     c = *(p++);
 117     num--;
 118     for (;;) {
 119         if (num <= 0)
 120             break;
 121         if ((c != '.') && (c != ' ')) {
 122             ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_INVALID_SEPARATOR);
 123             goto err;
 124         }
 125         l = 0;
 126         use_bn = 0;
 127         for (;;) {
 128             if (num <= 0)
 129                 break;
 130             num--;
 131             c = *(p++);
 132             if ((c == ' ') || (c == '.'))
 133                 break;
 134             if ((c < '0') || (c > '9')) {
 135                 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_INVALID_DIGIT);
 136                 goto err;
 137             }
 138             if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) {
 139                 use_bn = 1;
 140                 if (!bl)
 141                     bl = BN_new();
 142                 if (!bl || !BN_set_word(bl, l))
 143                     goto err;
 144             }
 145             if (use_bn) {
 146                 if (!BN_mul_word(bl, 10L)
 147                     || !BN_add_word(bl, c - '0'))
 148                     goto err;
 149             } else
 150                 l = l * 10L + (long)(c - '0');
 151         }
 152         if (len == 0) {
 153             if ((first < 2) && (l >= 40)) {
 154                 ASN1err(ASN1_F_A2D_ASN1_OBJECT,
 155                         ASN1_R_SECOND_NUMBER_TOO_LARGE);
 156                 goto err;
 157             }
 158             if (use_bn) {
 159                 if (!BN_add_word(bl, first * 40))
 160                     goto err;
 161             } else
 162                 l += (long)first *40;
 163         }
 164         i = 0;
 165         if (use_bn) {
 166             int blsize;
 167             blsize = BN_num_bits(bl);
 168             blsize = (blsize + 6) / 7;
 169             if (blsize > tmpsize) {
 170                 if (tmp != ftmp)
 171                     OPENSSL_free(tmp);
 172                 tmpsize = blsize + 32;
 173                 tmp = OPENSSL_malloc(tmpsize);
 174                 if (!tmp)
 175                     goto err;
 176             }
 177             while (blsize--)
 178                 tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
 179         } else {
 180
 181             for (;;) {
 182                 tmp[i++] = (unsigned char)l & 0x7f;
 183                 l >>= 7L;
 184                 if (l == 0L)
 185                     break;
 186             }
 187
 188         }
 189         if (out != NULL) {
 190             if (len + i > olen) {
 191                 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_BUFFER_TOO_SMALL);
 192                 goto err;
 193             }
 194             while (--i > 0)
 195                 out[len++] = tmp[i] | 0x80;
 196             out[len++] = tmp[0];
 197         } else
 198             len += i;
 199     }
 200     if (tmp != ftmp)
 201         OPENSSL_free(tmp);
 202     if (bl)
 203         BN_free(bl);
 204     return (len);
 205  err:
 206     if (tmp != ftmp)
 207         OPENSSL_free(tmp);
 208     if (bl)
 209         BN_free(bl);
 210     return (0);
 211 }
 212
 213 int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
 214 {
 215     return OBJ_obj2txt(buf, buf_len, a, 0);
 216 }
 217
 218 int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
 219 {
 220     char buf[80], *p = buf;
 221     int i;
 222
 223     if ((a == NULL) || (a->data == NULL))
 224         return (BIO_write(bp, "NULL", 4));
 225     i = i2t_ASN1_OBJECT(buf, sizeof buf, a);
 226     if (i > (int)(sizeof(buf) - 1)) {
 227         p = OPENSSL_malloc(i + 1);
 228         if (!p)
 229             return -1;
 230         i2t_ASN1_OBJECT(p, i + 1, a);
 231     }
 232     if (i <= 0)
 233         return BIO_write(bp, "<INVALID>", 9);
 234     BIO_write(bp, p, i);
 235     if (p != buf)
 236         OPENSSL_free(p);
 237     return (i);
 238 }
 239
 240 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
 241                              long length)
 242 {
 243     const unsigned char *p;
 244     long len;
 245     int tag, xclass;
 246     int inf, i;
 247     ASN1_OBJECT *ret = NULL;
 248     p = *pp;
 249     inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
 250     if (inf & 0x80) {
 251         i = ASN1_R_BAD_OBJECT_HEADER;
 252         goto err;
 253     }
 254
 255     if (tag != V_ASN1_OBJECT) {
 256         i = ASN1_R_EXPECTING_AN_OBJECT;
 257         goto err;
 258     }
 259     ret = c2i_ASN1_OBJECT(a, &p, len);
 260     if (ret)
 261         *pp = p;
 262     return ret;
 263  err:
 264     ASN1err(ASN1_F_D2I_ASN1_OBJECT, i);
 265     return (NULL);
 266 }
 267
 268 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
 269                              long len)
 270 {
 271     ASN1_OBJECT *ret = NULL;
 272     const unsigned char *p;
 273     unsigned char *data;
 274     int i, length;
 275
 276     /*
 277      * Sanity check OID encoding. Need at least one content octet. MSB must
 278      * be clear in the last octet. can't have leading 0x80 in subidentifiers,
 279      * see: X.690 8.19.2
 280      */
 281     if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
 282         p[len - 1] & 0x80) {
 283         ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING);
 284         return NULL;
 285     }
 286     /* Now 0 < len <= INT_MAX, so the cast is safe. */
 287     length = (int)len;
 288     for (i = 0; i < length; i++, p++) {
 289         if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
 290             ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING);
 291             return NULL;
 292         }
 293     }
 294
 295     /*
 296      * only the ASN1_OBJECTs from the 'table' will have values for ->sn or
 297      * ->ln
 298      */
 299     if ((a == NULL) || ((*a) == NULL) ||
 300         !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
 301         if ((ret = ASN1_OBJECT_new()) == NULL)
 302             return (NULL);
 303     } else
 304         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 < length)) {
 312         ret->length = 0;
 313         if (data != NULL)
 314             OPENSSL_free(data);
 315         data = (unsigned char *)OPENSSL_malloc(length);
 316         if (data == NULL) {
 317             i = ERR_R_MALLOC_FAILURE;
 318             goto err;
 319         }
 320         ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 321     }
 322     memcpy(data, p, length);
 323     /* reattach data to object, after which it remains const */
 324     ret->data = data;
 325     ret->length = length;
 326     ret->sn = NULL;
 327     ret->ln = NULL;
 328     /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
 329     p += length;
 330
 331     if (a != NULL)
 332         (*a) = ret;
 333     *pp = p;
 334     return (ret);
 335  err:
 336     ASN1err(ASN1_F_C2I_ASN1_OBJECT, i);
 337     if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 338         ASN1_OBJECT_free(ret);
 339     return (NULL);
 340 }
 341
 342 ASN1_OBJECT *ASN1_OBJECT_new(void)
 343 {
 344     ASN1_OBJECT *ret;
 345
 346     ret = (ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
 347     if (ret == NULL) {
 348         ASN1err(ASN1_F_ASN1_OBJECT_NEW, ERR_R_MALLOC_FAILURE);
 349         return (NULL);
 350     }
 351     ret->length = 0;
 352     ret->data = NULL;
 353     ret->nid = 0;
 354     ret->sn = NULL;
 355     ret->ln = NULL;
 356     ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
 357     return (ret);
 358 }
 359
 360 void ASN1_OBJECT_free(ASN1_OBJECT *a)
 361 {
 362     if (a == NULL)
 363         return;
 364     if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
 365 #ifndef CONST_STRICT            /* disable purely for compile-time strict
 366                                  * const checking. Doing this on a "real"
 367                                  * compile will cause memory leaks */
 368         if (a->sn != NULL)
 369             OPENSSL_free((void *)a->sn);
 370         if (a->ln != NULL)
 371             OPENSSL_free((void *)a->ln);
 372 #endif
 373         a->sn = a->ln = NULL;
 374     }
 375     if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
 376         if (a->data != NULL)
 377             OPENSSL_free((void *)a->data);
 378         a->data = NULL;
 379         a->length = 0;
 380     }
 381     if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
 382         OPENSSL_free(a);
 383 }
 384
 385 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
 386                                 const char *sn, const char *ln)
 387 {
 388     ASN1_OBJECT o;
 389
 390     o.sn = sn;
 391     o.ln = ln;
 392     o.data = data;
 393     o.nid = nid;
 394     o.length = len;
 395     o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
 396         ASN1_OBJECT_FLAG_DYNAMIC_DATA;
 397     return (OBJ_dup(&o));
 398 }
 399
 400 IMPLEMENT_STACK_OF(ASN1_OBJECT)
 401
 402 IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT)