crypto/engine/eng_cnf.c

   1 /*
   2  * Written by Stephen Henson (steve@openssl.org) for the OpenSSL project
   3  * 2001.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2001 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 "eng_int.h"
  60 #include <openssl/conf.h>
  61
  62 /* #define ENGINE_CONF_DEBUG */
  63
  64 /* ENGINE config module */
  65
  66 static char *skip_dot(char *name)
  67 {
  68     char *p;
  69     p = strchr(name, '.');
  70     if (p)
  71         return p + 1;
  72     return name;
  73 }
  74
  75 static STACK_OF(ENGINE) *initialized_engines = NULL;
  76
  77 static int int_engine_init(ENGINE *e)
  78 {
  79     if (!ENGINE_init(e))
  80         return 0;
  81     if (!initialized_engines)
  82         initialized_engines = sk_ENGINE_new_null();
  83     if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e)) {
  84         ENGINE_finish(e);
  85         return 0;
  86     }
  87     return 1;
  88 }
  89
  90 static int int_engine_configure(char *name, char *value, const CONF *cnf)
  91 {
  92     int i;
  93     int ret = 0;
  94     long do_init = -1;
  95     STACK_OF(CONF_VALUE) *ecmds;
  96     CONF_VALUE *ecmd = NULL;
  97     char *ctrlname, *ctrlvalue;
  98     ENGINE *e = NULL;
  99     int soft = 0;
 100
 101     name = skip_dot(name);
 102 #ifdef ENGINE_CONF_DEBUG
 103     fprintf(stderr, "Configuring engine %s\n", name);
 104 #endif
 105     /* Value is a section containing ENGINE commands */
 106     ecmds = NCONF_get_section(cnf, value);
 107
 108     if (!ecmds) {
 109         ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
 110                   ENGINE_R_ENGINE_SECTION_ERROR);
 111         return 0;
 112     }
 113
 114     for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++) {
 115         ecmd = sk_CONF_VALUE_value(ecmds, i);
 116         ctrlname = skip_dot(ecmd->name);
 117         ctrlvalue = ecmd->value;
 118 #ifdef ENGINE_CONF_DEBUG
 119         fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname,
 120                 ctrlvalue);
 121 #endif
 122
 123         /* First handle some special pseudo ctrls */
 124
 125         /* Override engine name to use */
 126         if (strcmp(ctrlname, "engine_id") == 0)
 127             name = ctrlvalue;
 128         else if (strcmp(ctrlname, "soft_load") == 0)
 129             soft = 1;
 130         /* Load a dynamic ENGINE */
 131         else if (strcmp(ctrlname, "dynamic_path") == 0) {
 132             e = ENGINE_by_id("dynamic");
 133             if (!e)
 134                 goto err;
 135             if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
 136                 goto err;
 137             if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
 138                 goto err;
 139             if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
 140                 goto err;
 141         }
 142         /* ... add other pseudos here ... */
 143         else {
 144             /*
 145              * At this point we need an ENGINE structural reference if we
 146              * don't already have one.
 147              */
 148             if (!e) {
 149                 e = ENGINE_by_id(name);
 150                 if (!e && soft) {
 151                     ERR_clear_error();
 152                     return 1;
 153                 }
 154                 if (!e)
 155                     goto err;
 156             }
 157             /*
 158              * Allow "EMPTY" to mean no value: this allows a valid "value" to
 159              * be passed to ctrls of type NO_INPUT
 160              */
 161             if (strcmp(ctrlvalue, "EMPTY") == 0)
 162                 ctrlvalue = NULL;
 163             if (strcmp(ctrlname, "init") == 0) {
 164                 if (!NCONF_get_number_e(cnf, value, "init", &do_init))
 165                     goto err;
 166                 if (do_init == 1) {
 167                     if (!int_engine_init(e))
 168                         goto err;
 169                 } else if (do_init != 0) {
 170                     ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
 171                               ENGINE_R_INVALID_INIT_VALUE);
 172                     goto err;
 173                 }
 174             } else if (strcmp(ctrlname, "default_algorithms") == 0) {
 175                 if (!ENGINE_set_default_string(e, ctrlvalue))
 176                     goto err;
 177             } else if (!ENGINE_ctrl_cmd_string(e, ctrlname, ctrlvalue, 0))
 178                 goto err;
 179         }
 180
 181     }
 182     if (e && (do_init == -1) && !int_engine_init(e)) {
 183         ecmd = NULL;
 184         goto err;
 185     }
 186     ret = 1;
 187  err:
 188     if (ret != 1) {
 189         ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
 190                   ENGINE_R_ENGINE_CONFIGURATION_ERROR);
 191         if (ecmd)
 192             ERR_add_error_data(6, "section=", ecmd->section,
 193                                ", name=", ecmd->name,
 194                                ", value=", ecmd->value);
 195     }
 196     ENGINE_free(e);
 197     return ret;
 198 }
 199
 200 static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
 201 {
 202     STACK_OF(CONF_VALUE) *elist;
 203     CONF_VALUE *cval;
 204     int i;
 205 #ifdef ENGINE_CONF_DEBUG
 206     fprintf(stderr, "Called engine module: name %s, value %s\n",
 207             CONF_imodule_get_name(md), CONF_imodule_get_value(md));
 208 #endif
 209     /* Value is a section containing ENGINEs to configure */
 210     elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));
 211
 212     if (!elist) {
 213         ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT,
 214                   ENGINE_R_ENGINES_SECTION_ERROR);
 215         return 0;
 216     }
 217
 218     for (i = 0; i < sk_CONF_VALUE_num(elist); i++) {
 219         cval = sk_CONF_VALUE_value(elist, i);
 220         if (!int_engine_configure(cval->name, cval->value, cnf))
 221             return 0;
 222     }
 223
 224     return 1;
 225 }
 226
 227 static void int_engine_module_finish(CONF_IMODULE *md)
 228 {
 229     ENGINE *e;
 230     while ((e = sk_ENGINE_pop(initialized_engines)))
 231         ENGINE_finish(e);
 232     sk_ENGINE_free(initialized_engines);
 233     initialized_engines = NULL;
 234 }
 235
 236 void ENGINE_add_conf_module(void)
 237 {
 238     CONF_module_add("engines",
 239                     int_engine_module_init, int_engine_module_finish);
 240 }