crypto/x509v3/v3_utl.c

   1 /* v3_utl.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58 /* X509 v3 extension utilities */
  59
  60
  61 #include <stdio.h>
  62 #include <ctype.h>
  63 #include "cryptlib.h"
  64 #include "conf.h"
  65 #include "x509v3.h"
  66
  67 static char *strip_spaces(char *name);
  68
  69 /* Add a CONF_VALUE name value pair to stack */
  70
  71 int X509V3_add_value(const char *name, const char *value, STACK **extlist)
  72 {
  73         CONF_VALUE *vtmp = NULL;
  74         char *tname = NULL, *tvalue = NULL;
  75         if(name && !(tname = BUF_strdup(name))) goto err;
  76         if(value && !(tvalue = BUF_strdup(value))) goto err;;
  77         if(!(vtmp = (CONF_VALUE *)Malloc(sizeof(CONF_VALUE)))) goto err;
  78         if(!*extlist && !(*extlist = sk_new(NULL))) goto err;
  79         vtmp->section = NULL;
  80         vtmp->name = tname;
  81         vtmp->value = tvalue;
  82         if(!sk_push(*extlist, (char *)vtmp)) goto err;
  83         return 1;
  84         err:
  85         X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
  86         if(vtmp) Free(vtmp);
  87         if(tname) Free(tname);
  88         if(tvalue) Free(tvalue);
  89         return 0;
  90 }
  91
  92 /* Free function for STACK of CONF_VALUE */
  93
  94 void X509V3_conf_free(CONF_VALUE *conf)
  95 {
  96         if(!conf) return;
  97         if(conf->name) Free(conf->name);
  98         if(conf->value) Free(conf->value);
  99         if(conf->section) Free(conf->section);
 100         Free((char *)conf);
 101 }
 102
 103 int X509V3_add_value_bool(const char *name, int asn1_bool, STACK **extlist)
 104 {
 105         if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
 106         return X509V3_add_value(name, "FALSE", extlist);
 107 }
 108
 109 int X509V3_add_value_bool_nf(char *name, int asn1_bool, STACK **extlist)
 110 {
 111         if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
 112         return 1;
 113 }
 114
 115
 116 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
 117 {
 118         BIGNUM *bntmp = NULL;
 119         char *strtmp = NULL;
 120         if(!a) return NULL;
 121         if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
 122             !(strtmp = BN_bn2dec(bntmp)) )
 123                 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
 124         BN_free(bntmp);
 125         return strtmp;
 126 }
 127
 128 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
 129 {
 130         BIGNUM *bntmp = NULL;
 131         char *strtmp = NULL;
 132         if(!a) return NULL;
 133         if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
 134             !(strtmp = BN_bn2dec(bntmp)) )
 135                 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
 136         BN_free(bntmp);
 137         return strtmp;
 138 }
 139
 140 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
 141 {
 142         BIGNUM *bn = NULL;
 143         ASN1_INTEGER *aint;
 144         bn = BN_new();
 145         if(!value) {
 146                 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
 147                 return 0;
 148         }
 149         if(!BN_dec2bn(&bn, value)) {
 150                 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
 151                 return 0;
 152         }
 153
 154         if(!(aint = BN_to_ASN1_INTEGER(bn, NULL))) {
 155                 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
 156                 return 0;
 157         }
 158         BN_free(bn);
 159         return aint;
 160 }
 161
 162 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
 163              STACK **extlist)
 164 {
 165         char *strtmp;
 166         int ret;
 167         if(!aint) return 1;
 168         if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
 169         ret = X509V3_add_value(name, strtmp, extlist);
 170         Free(strtmp);
 171         return ret;
 172 }
 173
 174 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
 175 {
 176         char *btmp;
 177         if(!(btmp = value->value)) goto err;
 178         if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
 179                  || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
 180                 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
 181                 *asn1_bool = 0xff;
 182                 return 1;
 183         } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
 184                  || !strcmp(btmp, "N") || !strcmp(btmp, "n")
 185                 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
 186                 *asn1_bool = 0;
 187                 return 1;
 188         }
 189         err:
 190         X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
 191         X509V3_conf_err(value);
 192         return 0;
 193 }
 194
 195 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
 196 {
 197         ASN1_INTEGER *itmp;
 198         if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
 199                 X509V3_conf_err(value);
 200                 return 0;
 201         }
 202         *aint = itmp;
 203         return 1;
 204 }
 205
 206 #define HDR_NAME        1
 207 #define HDR_VALUE       2
 208
 209 /*#define DEBUG*/
 210
 211 STACK *X509V3_parse_list(char *line)
 212 {
 213         char *p, *q, c;
 214         char *ntmp, *vtmp;
 215         STACK *values = NULL;
 216         char *linebuf;
 217         int state;
 218         /* We are going to modify the line so copy it first */
 219         linebuf = BUF_strdup(line);
 220         state = HDR_NAME;
 221         ntmp = NULL;
 222         /* Go through all characters */
 223         for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
 224
 225                 switch(state) {
 226                         case HDR_NAME:
 227                         if(c == ':') {
 228                                 state = HDR_VALUE;
 229                                 *p = 0;
 230                                 ntmp = strip_spaces(q);
 231                                 if(!ntmp) {
 232                                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
 233                                         goto err;
 234                                 }
 235                                 q = p + 1;
 236                         } else if(c == ',') {
 237                                 *p = 0;
 238                                 ntmp = strip_spaces(q);
 239                                 q = p + 1;
 240 #ifdef DEBUG
 241                                 printf("%s\n", ntmp);
 242 #endif
 243                                 if(!ntmp) {
 244                                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
 245                                         goto err;
 246                                 }
 247                                 X509V3_add_value(ntmp, NULL, &values);
 248                         }
 249                         break ;
 250
 251                         case HDR_VALUE:
 252                         if(c == ',') {
 253                                 state = HDR_NAME;
 254                                 *p = 0;
 255                                 vtmp = strip_spaces(q);
 256 #ifdef DEBUG
 257                                 printf("%s\n", ntmp);
 258 #endif
 259                                 if(!vtmp) {
 260                                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
 261                                         goto err;
 262                                 }
 263                                 X509V3_add_value(ntmp, vtmp, &values);
 264                                 ntmp = NULL;
 265                                 q = p + 1;
 266                         }
 267
 268                 }
 269         }
 270
 271         if(state == HDR_VALUE) {
 272                 vtmp = strip_spaces(q);
 273 #ifdef DEBUG
 274                 printf("%s=%s\n", ntmp, vtmp);
 275 #endif
 276                 if(!vtmp) {
 277                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
 278                         goto err;
 279                 }
 280                 X509V3_add_value(ntmp, vtmp, &values);
 281         } else {
 282                 ntmp = strip_spaces(q);
 283 #ifdef DEBUG
 284                 printf("%s\n", ntmp);
 285 #endif
 286                 if(!ntmp) {
 287                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
 288                         goto err;
 289                 }
 290                 X509V3_add_value(ntmp, NULL, &values);
 291         }
 292 Free(linebuf);
 293 return values;
 294
 295 err:
 296 Free(linebuf);
 297 sk_pop_free(values, X509V3_conf_free);
 298 return NULL;
 299
 300 }
 301
 302 /* Delete leading and trailing spaces from a string */
 303 static char *strip_spaces(char *name)
 304 {
 305         char *p, *q;
 306         /* Skip over leading spaces */
 307         p = name;
 308         while(*p && isspace(*p)) p++;
 309         if(!*p) return NULL;
 310         q = p + strlen(p) - 1;
 311         while((q != p) && isspace(*q)) q--;
 312         if(p != q) q[1] = 0;
 313         if(!*p) return NULL;
 314         return p;
 315 }
 316
 317 /* hex string utilities */
 318
 319 /* Given a buffer of length 'len' return a Malloc'ed string with its
 320  * hex representation
 321  */
 322
 323 char *hex_to_string(unsigned char *buffer, long len)
 324 {
 325         char *tmp, *q;
 326         unsigned char *p;
 327         int i;
 328         static char hexdig[] = "0123456789ABCDEF";
 329         if(!buffer || !len) return NULL;
 330         if(!(tmp = Malloc(len * 3 + 1))) {
 331                 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
 332                 return NULL;
 333         }
 334         q = tmp;
 335         for(i = 0, p = buffer; i < len; i++,p++) {
 336                 *q++ = hexdig[(*p >> 4) & 0xf];
 337                 *q++ = hexdig[*p & 0xf];
 338                 *q++ = ':';
 339         }
 340         q[-1] = 0;
 341         return tmp;
 342 }
 343
 344 /* Give a string of hex digits convert to
 345  * a buffer
 346  */
 347
 348 unsigned char *string_to_hex(char *str, long *len)
 349 {
 350         unsigned char *hexbuf, *q;
 351         unsigned char ch, cl, *p;
 352         if(!str) {
 353                 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
 354                 return NULL;
 355         }
 356         if(!(hexbuf = Malloc(strlen(str) >> 1))) goto err;
 357         for(p = (unsigned char *)str, q = hexbuf; *p;) {
 358                 ch = *p++;
 359                 if(ch == ':') continue;
 360                 cl = *p++;
 361                 if(!cl) {
 362                         X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
 363                         Free(hexbuf);
 364                         return NULL;
 365                 }
 366                 if(isupper(ch)) ch = tolower(ch);
 367                 if(isupper(cl)) cl = tolower(cl);
 368
 369                 if((ch >= '0') && (ch <= '9')) ch -= '0';
 370                 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
 371                 else goto badhex;
 372
 373                 if((cl >= '0') && (cl <= '9')) cl -= '0';
 374                 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
 375                 else goto badhex;
 376
 377                 *q++ = (ch << 4) | cl;
 378         }
 379
 380         if(len) *len = q - hexbuf;
 381
 382         return hexbuf;
 383
 384         err:
 385         if(hexbuf) Free(hexbuf);
 386         X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
 387         return NULL;
 388
 389         badhex:
 390         Free(hexbuf);
 391         X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
 392         return NULL;
 393
 394 }
 395
 396 /* V2I name comparison function: returns zero if 'name' matches
 397  * cmp or cmp.*
 398  */
 399
 400 int name_cmp(const char *name, const char *cmp)
 401 {
 402         int len, ret;
 403         char c;
 404         len = strlen(cmp);
 405         if((ret = strncmp(name, cmp, len))) return ret;
 406         c = name[len];
 407         if(!c || (c=='.')) return 0;
 408         return 1;
 409 }