Cryptlib/OpenSSL/crypto/conf/conf_lib.c

   1 /*
   2  * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <internal/conf.h>
  13 #include <openssl/crypto.h>
  14 #include <openssl/err.h>
  15 #include <openssl/conf.h>
  16 #include <openssl/conf_api.h>
  17 #include <openssl/lhash.h>
  18 #include "e_os.h"
  19
  20 static CONF_METHOD *default_CONF_method = NULL;
  21
  22 /* Init a 'CONF' structure from an old LHASH */
  23
  24 void CONF_set_nconf(CONF *conf, LHASH_OF(CONF_VALUE) *hash)
  25 {
  26     if (default_CONF_method == NULL)
  27         default_CONF_method = NCONF_default();
  28
  29     default_CONF_method->init(conf);
  30     conf->data = hash;
  31 }
  32
  33 /*
  34  * The following section contains the "CONF classic" functions, rewritten in
  35  * terms of the new CONF interface.
  36  */
  37
  38 int CONF_set_default_method(CONF_METHOD *meth)
  39 {
  40     default_CONF_method = meth;
  41     return 1;
  42 }
  43
  44 LHASH_OF(CONF_VALUE) *CONF_load(LHASH_OF(CONF_VALUE) *conf, const char *file,
  45                                 long *eline)
  46 {
  47     LHASH_OF(CONF_VALUE) *ltmp;
  48     BIO *in = NULL;
  49
  50 #ifdef OPENSSL_SYS_VMS
  51     in = BIO_new_file(file, "r");
  52 #else
  53     in = BIO_new_file(file, "rb");
  54 #endif
  55     if (in == NULL) {
  56         CONFerr(CONF_F_CONF_LOAD, ERR_R_SYS_LIB);
  57         return NULL;
  58     }
  59
  60     ltmp = CONF_load_bio(conf, in, eline);
  61     BIO_free(in);
  62
  63     return ltmp;
  64 }
  65
  66 #ifndef OPENSSL_NO_STDIO
  67 LHASH_OF(CONF_VALUE) *CONF_load_fp(LHASH_OF(CONF_VALUE) *conf, FILE *fp,
  68                                    long *eline)
  69 {
  70     BIO *btmp;
  71     LHASH_OF(CONF_VALUE) *ltmp;
  72     if ((btmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
  73         CONFerr(CONF_F_CONF_LOAD_FP, ERR_R_BUF_LIB);
  74         return NULL;
  75     }
  76     ltmp = CONF_load_bio(conf, btmp, eline);
  77     BIO_free(btmp);
  78     return ltmp;
  79 }
  80 #endif
  81
  82 LHASH_OF(CONF_VALUE) *CONF_load_bio(LHASH_OF(CONF_VALUE) *conf, BIO *bp,
  83                                     long *eline)
  84 {
  85     CONF ctmp;
  86     int ret;
  87
  88     CONF_set_nconf(&ctmp, conf);
  89
  90     ret = NCONF_load_bio(&ctmp, bp, eline);
  91     if (ret)
  92         return ctmp.data;
  93     return NULL;
  94 }
  95
  96 STACK_OF(CONF_VALUE) *CONF_get_section(LHASH_OF(CONF_VALUE) *conf,
  97                                        const char *section)
  98 {
  99     if (conf == NULL) {
 100         return NULL;
 101     } else {
 102         CONF ctmp;
 103         CONF_set_nconf(&ctmp, conf);
 104         return NCONF_get_section(&ctmp, section);
 105     }
 106 }
 107
 108 char *CONF_get_string(LHASH_OF(CONF_VALUE) *conf, const char *group,
 109                       const char *name)
 110 {
 111     if (conf == NULL) {
 112         return NCONF_get_string(NULL, group, name);
 113     } else {
 114         CONF ctmp;
 115         CONF_set_nconf(&ctmp, conf);
 116         return NCONF_get_string(&ctmp, group, name);
 117     }
 118 }
 119
 120 long CONF_get_number(LHASH_OF(CONF_VALUE) *conf, const char *group,
 121                      const char *name)
 122 {
 123     int status;
 124     long result = 0;
 125
 126     if (conf == NULL) {
 127         status = NCONF_get_number_e(NULL, group, name, &result);
 128     } else {
 129         CONF ctmp;
 130         CONF_set_nconf(&ctmp, conf);
 131         status = NCONF_get_number_e(&ctmp, group, name, &result);
 132     }
 133
 134     if (status == 0) {
 135         /* This function does not believe in errors... */
 136         ERR_clear_error();
 137     }
 138     return result;
 139 }
 140
 141 void CONF_free(LHASH_OF(CONF_VALUE) *conf)
 142 {
 143     CONF ctmp;
 144     CONF_set_nconf(&ctmp, conf);
 145     NCONF_free_data(&ctmp);
 146 }
 147
 148 #ifndef OPENSSL_NO_STDIO
 149 int CONF_dump_fp(LHASH_OF(CONF_VALUE) *conf, FILE *out)
 150 {
 151     BIO *btmp;
 152     int ret;
 153
 154     if ((btmp = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
 155         CONFerr(CONF_F_CONF_DUMP_FP, ERR_R_BUF_LIB);
 156         return 0;
 157     }
 158     ret = CONF_dump_bio(conf, btmp);
 159     BIO_free(btmp);
 160     return ret;
 161 }
 162 #endif
 163
 164 int CONF_dump_bio(LHASH_OF(CONF_VALUE) *conf, BIO *out)
 165 {
 166     CONF ctmp;
 167     CONF_set_nconf(&ctmp, conf);
 168     return NCONF_dump_bio(&ctmp, out);
 169 }
 170
 171 /*
 172  * The following section contains the "New CONF" functions.  They are
 173  * completely centralised around a new CONF structure that may contain
 174  * basically anything, but at least a method pointer and a table of data.
 175  * These functions are also written in terms of the bridge functions used by
 176  * the "CONF classic" functions, for consistency.
 177  */
 178
 179 CONF *NCONF_new(CONF_METHOD *meth)
 180 {
 181     CONF *ret;
 182
 183     if (meth == NULL)
 184         meth = NCONF_default();
 185
 186     ret = meth->create(meth);
 187     if (ret == NULL) {
 188         CONFerr(CONF_F_NCONF_NEW, ERR_R_MALLOC_FAILURE);
 189         return (NULL);
 190     }
 191
 192     return ret;
 193 }
 194
 195 void NCONF_free(CONF *conf)
 196 {
 197     if (conf == NULL)
 198         return;
 199     conf->meth->destroy(conf);
 200 }
 201
 202 void NCONF_free_data(CONF *conf)
 203 {
 204     if (conf == NULL)
 205         return;
 206     conf->meth->destroy_data(conf);
 207 }
 208
 209 int NCONF_load(CONF *conf, const char *file, long *eline)
 210 {
 211     if (conf == NULL) {
 212         CONFerr(CONF_F_NCONF_LOAD, CONF_R_NO_CONF);
 213         return 0;
 214     }
 215
 216     return conf->meth->load(conf, file, eline);
 217 }
 218
 219 #ifndef OPENSSL_NO_STDIO
 220 int NCONF_load_fp(CONF *conf, FILE *fp, long *eline)
 221 {
 222     BIO *btmp;
 223     int ret;
 224     if ((btmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 225         CONFerr(CONF_F_NCONF_LOAD_FP, ERR_R_BUF_LIB);
 226         return 0;
 227     }
 228     ret = NCONF_load_bio(conf, btmp, eline);
 229     BIO_free(btmp);
 230     return ret;
 231 }
 232 #endif
 233
 234 int NCONF_load_bio(CONF *conf, BIO *bp, long *eline)
 235 {
 236     if (conf == NULL) {
 237         CONFerr(CONF_F_NCONF_LOAD_BIO, CONF_R_NO_CONF);
 238         return 0;
 239     }
 240
 241     return conf->meth->load_bio(conf, bp, eline);
 242 }
 243
 244 STACK_OF(CONF_VALUE) *NCONF_get_section(const CONF *conf, const char *section)
 245 {
 246     if (conf == NULL) {
 247         CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_CONF);
 248         return NULL;
 249     }
 250
 251     if (section == NULL) {
 252         CONFerr(CONF_F_NCONF_GET_SECTION, CONF_R_NO_SECTION);
 253         return NULL;
 254     }
 255
 256     return _CONF_get_section_values(conf, section);
 257 }
 258
 259 char *NCONF_get_string(const CONF *conf, const char *group, const char *name)
 260 {
 261     char *s = _CONF_get_string(conf, group, name);
 262
 263     /*
 264      * Since we may get a value from an environment variable even if conf is
 265      * NULL, let's check the value first
 266      */
 267     if (s)
 268         return s;
 269
 270     if (conf == NULL) {
 271         CONFerr(CONF_F_NCONF_GET_STRING,
 272                 CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
 273         return NULL;
 274     }
 275     CONFerr(CONF_F_NCONF_GET_STRING, CONF_R_NO_VALUE);
 276     ERR_add_error_data(4, "group=", group, " name=", name);
 277     return NULL;
 278 }
 279
 280 int NCONF_get_number_e(const CONF *conf, const char *group, const char *name,
 281                        long *result)
 282 {
 283     char *str;
 284
 285     if (result == NULL) {
 286         CONFerr(CONF_F_NCONF_GET_NUMBER_E, ERR_R_PASSED_NULL_PARAMETER);
 287         return 0;
 288     }
 289
 290     str = NCONF_get_string(conf, group, name);
 291
 292     if (str == NULL)
 293         return 0;
 294
 295     for (*result = 0; conf->meth->is_number(conf, *str);) {
 296         *result = (*result) * 10 + conf->meth->to_int(conf, *str);
 297         str++;
 298     }
 299
 300     return 1;
 301 }
 302
 303 #ifndef OPENSSL_NO_STDIO
 304 int NCONF_dump_fp(const CONF *conf, FILE *out)
 305 {
 306     BIO *btmp;
 307     int ret;
 308     if ((btmp = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
 309         CONFerr(CONF_F_NCONF_DUMP_FP, ERR_R_BUF_LIB);
 310         return 0;
 311     }
 312     ret = NCONF_dump_bio(conf, btmp);
 313     BIO_free(btmp);
 314     return ret;
 315 }
 316 #endif
 317
 318 int NCONF_dump_bio(const CONF *conf, BIO *out)
 319 {
 320     if (conf == NULL) {
 321         CONFerr(CONF_F_NCONF_DUMP_BIO, CONF_R_NO_CONF);
 322         return 0;
 323     }
 324
 325     return conf->meth->dump(conf, out);
 326 }
 327
 328 /*
 329  * These routines call the C malloc/free, to avoid intermixing with
 330  * OpenSSL function pointers before the library is initialized.
 331  */
 332 OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void)
 333 {
 334     OPENSSL_INIT_SETTINGS *ret = malloc(sizeof(*ret));
 335
 336     if (ret != NULL)
 337         memset(ret, 0, sizeof(*ret));
 338     return ret;
 339 }
 340
 341
 342 #ifndef OPENSSL_NO_STDIO
 343 int OPENSSL_INIT_set_config_appname(OPENSSL_INIT_SETTINGS *settings,
 344                                     const char *appname)
 345 {
 346     char *newappname = NULL;
 347
 348     if (appname != NULL) {
 349         newappname = strdup(appname);
 350         if (newappname == NULL)
 351             return 0;
 352     }
 353
 354     free(settings->appname);
 355     settings->appname = newappname;
 356
 357     return 1;
 358 }
 359 #endif
 360
 361 void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings)
 362 {
 363     free(settings->appname);
 364     free(settings);
 365 }