Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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) |