1 /* $OpenBSD: a_object.c,v 1.22 2014/07/12 16:03:36 miod Exp $ */ 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 <limits.h> 60 #include <stdio.h> 61 #include <string.h> 62 63 #include <openssl/asn1.h> 64 #include <openssl/bn.h> 65 #include <openssl/err.h> 66 #include <openssl/buffer.h> 67 #include <openssl/objects.h> 68 69 int 70 i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp) 71 { 72 unsigned char *p; 73 int objsize; 74 75 if ((a == NULL) || (a->data == NULL)) 76 return (0); 77 78 objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT); 79 if (pp == NULL) 80 return objsize; 81 82 p = *pp; 83 ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL); 84 memcpy(p, a->data, a->length); 85 p += a->length; 86 87 *pp = p; 88 return (objsize); 89 } 90 91 int 92 a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num) 93 { 94 int i, first, len = 0, c, use_bn; 95 char ftmp[24], *tmp = ftmp; 96 int tmpsize = sizeof ftmp; 97 const char *p; 98 unsigned long l; 99 BIGNUM *bl = NULL; 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 first= c-'0'; 111 } else { 112 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_FIRST_NUM_TOO_LARGE); 113 goto err; 114 } 115 116 if (num <= 0) { 117 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_MISSING_SECOND_NUMBER); 118 goto err; 119 } 120 c = *(p++); 121 num--; 122 for (;;) { 123 if (num <= 0) 124 break; 125 if ((c != '.') && (c != ' ')) { 126 ASN1err(ASN1_F_A2D_ASN1_OBJECT, 127 ASN1_R_INVALID_SEPARATOR); 128 goto err; 129 } 130 l = 0; 131 use_bn = 0; 132 for (;;) { 133 if (num <= 0) 134 break; 135 num--; 136 c = *(p++); 137 if ((c == ' ') || (c == '.')) 138 break; 139 if ((c < '0') || (c > '9')) { 140 ASN1err(ASN1_F_A2D_ASN1_OBJECT, 141 ASN1_R_INVALID_DIGIT); 142 goto err; 143 } 144 if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) { 145 use_bn = 1; 146 if (!bl) 147 bl = BN_new(); 148 if (!bl || !BN_set_word(bl, l)) 149 goto err; 150 } 151 if (use_bn) { 152 if (!BN_mul_word(bl, 10L) || 153 !BN_add_word(bl, c-'0')) 154 goto err; 155 } else 156 l = l * 10L + (long)(c - '0'); 157 } 158 if (len == 0) { 159 if ((first < 2) && (l >= 40)) { 160 ASN1err(ASN1_F_A2D_ASN1_OBJECT, 161 ASN1_R_SECOND_NUMBER_TOO_LARGE); 162 goto err; 163 } 164 if (use_bn) { 165 if (!BN_add_word(bl, first * 40)) 166 goto err; 167 } else 168 l += (long)first * 40; 169 } 170 i = 0; 171 if (use_bn) { 172 int blsize; 173 blsize = BN_num_bits(bl); 174 blsize = (blsize + 6) / 7; 175 if (blsize > tmpsize) { 176 if (tmp != ftmp) 177 free(tmp); 178 tmpsize = blsize + 32; 179 tmp = malloc(tmpsize); 180 if (!tmp) 181 goto err; 182 } 183 while (blsize--) 184 tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L); 185 } else { 186 187 for (;;) { 188 tmp[i++] = (unsigned char)l & 0x7f; 189 l >>= 7L; 190 if (l == 0L) 191 break; 192 } 193 194 } 195 if (out != NULL) { 196 if (len + i > olen) { 197 ASN1err(ASN1_F_A2D_ASN1_OBJECT, 198 ASN1_R_BUFFER_TOO_SMALL); 199 goto err; 200 } 201 while (--i > 0) 202 out[len++] = tmp[i]|0x80; 203 out[len++] = tmp[0]; 204 } else 205 len += i; 206 } 207 if (tmp != ftmp) 208 free(tmp); 209 BN_free(bl); 210 return (len); 211 212 err: 213 if (tmp != ftmp) 214 free(tmp); 215 BN_free(bl); 216 return (0); 217 } 218 219 int 220 i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a) 221 { 222 return OBJ_obj2txt(buf, buf_len, a, 0); 223 } 224 225 int 226 i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a) 227 { 228 char buf[80], *p = buf; 229 int i; 230 231 if ((a == NULL) || (a->data == NULL)) 232 return(BIO_write(bp, "NULL",4)); 233 i = i2t_ASN1_OBJECT(buf, sizeof buf, a); 234 if (i > (int)(sizeof(buf) - 1)) { 235 p = malloc(i + 1); 236 if (!p) 237 return -1; 238 i2t_ASN1_OBJECT(p, i + 1, a); 239 } 240 if (i <= 0) 241 return BIO_write(bp, "<INVALID>", 9); 242 BIO_write(bp, p, i); 243 if (p != buf) 244 free(p); 245 return (i); 246 } 247 248 ASN1_OBJECT * 249 d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, long length) 250 { 251 const unsigned char *p; 252 long len; 253 int tag, xclass; 254 int inf, i; 255 ASN1_OBJECT *ret = NULL; 256 257 p = *pp; 258 inf = ASN1_get_object(&p, &len, &tag, &xclass, length); 259 if (inf & 0x80) { 260 i = ASN1_R_BAD_OBJECT_HEADER; 261 goto err; 262 } 263 264 if (tag != V_ASN1_OBJECT) { 265 i = ASN1_R_EXPECTING_AN_OBJECT; 266 goto err; 267 } 268 ret = c2i_ASN1_OBJECT(a, &p, len); 269 if (ret) 270 *pp = p; 271 return ret; 272 273 err: 274 ASN1err(ASN1_F_D2I_ASN1_OBJECT, i); 275 return (NULL); 276 } 277 278 ASN1_OBJECT * 279 c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, long len) 280 { 281 ASN1_OBJECT *ret = NULL; 282 const unsigned char *p; 283 unsigned char *data; 284 int i; 285 286 /* Sanity check OID encoding: can't have leading 0x80 in 287 * subidentifiers, see: X.690 8.19.2 288 */ 289 for (i = 0, p = *pp; i < len; i++, p++) { 290 if (*p == 0x80 && (!i || !(p[-1] & 0x80))) { 291 ASN1err(ASN1_F_C2I_ASN1_OBJECT, 292 ASN1_R_INVALID_OBJECT_ENCODING); 293 return NULL; 294 } 295 } 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 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 < len)) { 312 ret->length = 0; 313 free(data); 314 data = malloc(len ? len : 1); 315 if (data == NULL) { 316 i = ERR_R_MALLOC_FAILURE; 317 goto err; 318 } 319 ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA; 320 } 321 memcpy(data, p, len); 322 /* reattach data to object, after which it remains const */ 323 ret->data = data; 324 ret->length = (int)len; 325 ret->sn = NULL; 326 ret->ln = NULL; 327 /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */ 328 p += len; 329 330 if (a != NULL) 331 (*a) = ret; 332 *pp = p; 333 return (ret); 334 335 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 * 343 ASN1_OBJECT_new(void) 344 { 345 ASN1_OBJECT *ret; 346 347 ret = malloc(sizeof(ASN1_OBJECT)); 348 if (ret == NULL) { 349 ASN1err(ASN1_F_ASN1_OBJECT_NEW, ERR_R_MALLOC_FAILURE); 350 return (NULL); 351 } 352 ret->length = 0; 353 ret->data = NULL; 354 ret->nid = 0; 355 ret->sn = NULL; 356 ret->ln = NULL; 357 ret->flags = ASN1_OBJECT_FLAG_DYNAMIC; 358 return (ret); 359 } 360 361 void 362 ASN1_OBJECT_free(ASN1_OBJECT *a) 363 { 364 if (a == NULL) 365 return; 366 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) { 367 free((void *)a->sn); 368 free((void *)a->ln); 369 a->sn = a->ln = NULL; 370 } 371 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) { 372 free((void *)a->data); 373 a->data = NULL; 374 a->length = 0; 375 } 376 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC) 377 free(a); 378 } 379 380 ASN1_OBJECT * 381 ASN1_OBJECT_create(int nid, unsigned char *data, int len, 382 const char *sn, const char *ln) 383 { 384 ASN1_OBJECT o; 385 386 o.sn = sn; 387 o.ln = ln; 388 o.data = data; 389 o.nid = nid; 390 o.length = len; 391 o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | 392 ASN1_OBJECT_FLAG_DYNAMIC_DATA; 393 return (OBJ_dup(&o)); 394 } 395 396 IMPLEMENT_STACK_OF(ASN1_OBJECT) 397 IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT) 398