lib/libcrypto/conf/conf_lib.c

   1 /* $OpenBSD: conf_lib.c,v 1.15 2017/01/29 17:49:22 beck Exp $ */
   2 /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 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
  59 #include <stdio.h>
  60 #include <openssl/crypto.h>
  61 #include <openssl/err.h>
  62 #include <openssl/conf.h>
  63 #include <openssl/conf_api.h>
  64 #include <openssl/lhash.h>
  65
  66 static CONF_METHOD *default_CONF_method = NULL;
  67
  68 /* Init a 'CONF' structure from an old LHASH */
  69
  70 void
  71 CONF_set_nconf(CONF *conf, LHASH_OF(CONF_VALUE) *hash)
  72 {
  73         if (default_CONF_method == NULL)
  74                 default_CONF_method = NCONF_default();
  75         default_CONF_method->init(conf);
  76         conf->data = hash;
  77 }
  78
  79 /* The following section contains the "CONF classic" functions,
  80    rewritten in terms of the new CONF interface. */
  81
  82 int
  83 CONF_set_default_method(CONF_METHOD *meth)
  84 {
  85         default_CONF_method = meth;
  86         return 1;
  87 }
  88
  89 LHASH_OF(CONF_VALUE) *CONF_load(LHASH_OF(CONF_VALUE) *conf, const char *file,
  90     long *eline)
  91 {
  92         LHASH_OF(CONF_VALUE) *ltmp;
  93         BIO *in = NULL;
  94
  95         in = BIO_new_file(file, "rb");
  96         if (in == NULL) {
  97                 CONFerror(ERR_R_SYS_LIB);
  98                 return NULL;
  99         }
 100
 101         ltmp = CONF_load_bio(conf, in, eline);
 102         BIO_free(in);
 103
 104         return ltmp;
 105 }
 106
 107 LHASH_OF(CONF_VALUE) *CONF_load_fp(LHASH_OF(CONF_VALUE) *conf, FILE *fp,
 108     long *eline)
 109 {
 110         BIO *btmp;
 111         LHASH_OF(CONF_VALUE) *ltmp;
 112
 113         if (!(btmp = BIO_new_fp(fp, BIO_NOCLOSE))) {
 114                 CONFerror(ERR_R_BUF_LIB);
 115                 return NULL;
 116         }
 117         ltmp = CONF_load_bio(conf, btmp, eline);
 118         BIO_free(btmp);
 119         return ltmp;
 120 }
 121
 122 LHASH_OF(CONF_VALUE) *CONF_load_bio(LHASH_OF(CONF_VALUE) *conf, BIO *bp,
 123     long *eline)
 124 {
 125         CONF ctmp;
 126         int ret;
 127
 128         CONF_set_nconf(&ctmp, conf);
 129
 130         ret = NCONF_load_bio(&ctmp, bp, eline);
 131         if (ret)
 132                 return ctmp.data;
 133         return NULL;
 134 }
 135
 136 STACK_OF(CONF_VALUE) *CONF_get_section(LHASH_OF(CONF_VALUE) *conf,
 137     const char *section)
 138 {
 139         if (conf == NULL) {
 140                 return NULL;
 141         } else {
 142                 CONF ctmp;
 143                 CONF_set_nconf(&ctmp, conf);
 144                 return NCONF_get_section(&ctmp, section);
 145         }
 146 }
 147
 148 char *
 149 CONF_get_string(LHASH_OF(CONF_VALUE) *conf, const char *group,
 150     const char *name)
 151 {
 152         if (conf == NULL) {
 153                 return NCONF_get_string(NULL, group, name);
 154         } else {
 155                 CONF ctmp;
 156                 CONF_set_nconf(&ctmp, conf);
 157                 return NCONF_get_string(&ctmp, group, name);
 158         }
 159 }
 160
 161 long
 162 CONF_get_number(LHASH_OF(CONF_VALUE) *conf, const char *group,
 163     const char *name)
 164 {
 165         int status;
 166         long result = 0;
 167
 168         if (conf == NULL) {
 169                 status = NCONF_get_number_e(NULL, group, name, &result);
 170         } else {
 171                 CONF ctmp;
 172                 CONF_set_nconf(&ctmp, conf);
 173                 status = NCONF_get_number_e(&ctmp, group, name, &result);
 174         }
 175
 176         if (status == 0) {
 177                 /* This function does not believe in errors... */
 178                 ERR_clear_error();
 179         }
 180         return result;
 181 }
 182
 183 void
 184 CONF_free(LHASH_OF(CONF_VALUE) *conf)
 185 {
 186         CONF ctmp;
 187
 188         CONF_set_nconf(&ctmp, conf);
 189         NCONF_free_data(&ctmp);
 190 }
 191
 192 int
 193 CONF_dump_fp(LHASH_OF(CONF_VALUE) *conf, FILE *out)
 194 {
 195         BIO *btmp;
 196         int ret;
 197
 198         if (!(btmp = BIO_new_fp(out, BIO_NOCLOSE))) {
 199                 CONFerror(ERR_R_BUF_LIB);
 200                 return 0;
 201         }
 202         ret = CONF_dump_bio(conf, btmp);
 203         BIO_free(btmp);
 204         return ret;
 205 }
 206
 207 int
 208 CONF_dump_bio(LHASH_OF(CONF_VALUE) *conf, BIO *out)
 209 {
 210         CONF ctmp;
 211
 212         CONF_set_nconf(&ctmp, conf);
 213         return NCONF_dump_bio(&ctmp, out);
 214 }
 215
 216 /* The following section contains the "New CONF" functions.  They are
 217    completely centralised around a new CONF structure that may contain
 218    basically anything, but at least a method pointer and a table of data.
 219    These functions are also written in terms of the bridge functions used
 220    by the "CONF classic" functions, for consistency.  */
 221
 222 CONF *
 223 NCONF_new(CONF_METHOD *meth)
 224 {
 225         CONF *ret;
 226
 227         if (meth == NULL)
 228                 meth = NCONF_default();
 229
 230         ret = meth->create(meth);
 231         if (ret == NULL) {
 232                 CONFerror(ERR_R_MALLOC_FAILURE);
 233                 return (NULL);
 234         }
 235
 236         return ret;
 237 }
 238
 239 void
 240 NCONF_free(CONF *conf)
 241 {
 242         if (conf == NULL)
 243                 return;
 244         conf->meth->destroy(conf);
 245 }
 246
 247 void
 248 NCONF_free_data(CONF *conf)
 249 {
 250         if (conf == NULL)
 251                 return;
 252         conf->meth->destroy_data(conf);
 253 }
 254
 255 int
 256 NCONF_load(CONF *conf, const char *file, long *eline)
 257 {
 258         if (conf == NULL) {
 259                 CONFerror(CONF_R_NO_CONF);
 260                 return 0;
 261         }
 262
 263         return conf->meth->load(conf, file, eline);
 264 }
 265
 266 int
 267 NCONF_load_fp(CONF *conf, FILE *fp, long *eline)
 268 {
 269         BIO *btmp;
 270         int ret;
 271
 272         if (!(btmp = BIO_new_fp(fp, BIO_NOCLOSE))) {
 273                 CONFerror(ERR_R_BUF_LIB);
 274                 return 0;
 275         }
 276         ret = NCONF_load_bio(conf, btmp, eline);
 277         BIO_free(btmp);
 278         return ret;
 279 }
 280
 281 int
 282 NCONF_load_bio(CONF *conf, BIO *bp, long *eline)
 283 {
 284         if (conf == NULL) {
 285                 CONFerror(CONF_R_NO_CONF);
 286                 return 0;
 287         }
 288
 289         return conf->meth->load_bio(conf, bp, eline);
 290 }
 291
 292 STACK_OF(CONF_VALUE) *
 293 NCONF_get_section(const CONF *conf, const char *section)
 294 {
 295         if (conf == NULL) {
 296                 CONFerror(CONF_R_NO_CONF);
 297                 return NULL;
 298         }
 299
 300         if (section == NULL) {
 301                 CONFerror(CONF_R_NO_SECTION);
 302                 return NULL;
 303         }
 304
 305         return _CONF_get_section_values(conf, section);
 306 }
 307
 308 char *
 309 NCONF_get_string(const CONF *conf, const char *group, const char *name)
 310 {
 311         char *s = _CONF_get_string(conf, group, name);
 312
 313         /* Since we may get a value from an environment variable even
 314            if conf is NULL, let's check the value first */
 315         if (s)
 316                 return s;
 317
 318         if (conf == NULL) {
 319                 CONFerror(CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
 320                 return NULL;
 321         }
 322         CONFerror(CONF_R_NO_VALUE);
 323         ERR_asprintf_error_data("group=%s name=%s",
 324             group ? group : "", name);
 325         return NULL;
 326 }
 327
 328 int
 329 NCONF_get_number_e(const CONF *conf, const char *group, const char *name,
 330     long *result)
 331 {
 332         char *str;
 333
 334         if (result == NULL) {
 335                 CONFerror(ERR_R_PASSED_NULL_PARAMETER);
 336                 return 0;
 337         }
 338
 339         str = NCONF_get_string(conf, group, name);
 340
 341         if (str == NULL)
 342                 return 0;
 343
 344         for (*result = 0; conf->meth->is_number(conf, *str); ) {
 345                 *result = (*result) * 10 + conf->meth->to_int(conf, *str);
 346                 str++;
 347         }
 348
 349         return 1;
 350 }
 351
 352 int
 353 NCONF_dump_fp(const CONF *conf, FILE *out)
 354 {
 355         BIO *btmp;
 356         int ret;
 357         if (!(btmp = BIO_new_fp(out, BIO_NOCLOSE))) {
 358                 CONFerror(ERR_R_BUF_LIB);
 359                 return 0;
 360         }
 361         ret = NCONF_dump_bio(conf, btmp);
 362         BIO_free(btmp);
 363         return ret;
 364 }
 365
 366 int
 367 NCONF_dump_bio(const CONF *conf, BIO *out)
 368 {
 369         if (conf == NULL) {
 370                 CONFerror(CONF_R_NO_CONF);
 371                 return 0;
 372         }
 373
 374         return conf->meth->dump(conf, out);
 375 }