crypto/engine/eng_cnf.c

   1 /* eng_cnf.c */
   2 /* Written by Stephen Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 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 <stdio.h>
  60 #include <openssl/crypto.h>
  61 #include "cryptlib.h"
  62 #include <openssl/conf.h>
  63 #include <openssl/engine.h>
  64
  65 /* #define ENGINE_CONF_DEBUG */
  66
  67 /* ENGINE config module */
  68
  69 static char *skip_dot(char *name)
  70         {
  71         char *p;
  72         p = strchr(name, '.');
  73         if (p)
  74                 return p + 1;
  75         return name;
  76         }
  77
  78 int int_engine_configure(char *name, char *value, const CONF *cnf)
  79         {
  80         int i;
  81         int ret = 0;
  82         STACK_OF(CONF_VALUE) *ecmds;
  83         CONF_VALUE *ecmd;
  84         char *ctrlname, *ctrlvalue;
  85         ENGINE *e = NULL;
  86         name = skip_dot(name);
  87 #ifdef ENGINE_CONF_DEBUG
  88         fprintf(stderr, "Configuring engine %s\n", name);
  89 #endif
  90         /* Value is a section containing ENGINE commands */
  91         ecmds = NCONF_get_section(cnf, value);
  92
  93         if (!ecmds)
  94                 {
  95                 ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_ENGINE_SECTION_ERROR);
  96                 return 0;
  97                 }
  98
  99         for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++)
 100                 {
 101                 ecmd = sk_CONF_VALUE_value(ecmds, i);
 102                 ctrlname = skip_dot(ecmd->name);
 103                 ctrlvalue = ecmd->value;
 104 #ifdef ENGINE_CONF_DEBUG
 105         fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname, ctrlvalue);
 106 #endif
 107
 108                 /* First handle some special pseudo ctrls */
 109
 110                 /* Override engine name to use */
 111                 if (!strcmp(ctrlname, "engine_id"))
 112                         name = ctrlvalue;
 113                 /* Load a dynamic ENGINE */
 114                 else if (!strcmp(ctrlname, "dynamic_path"))
 115                         {
 116                         e = ENGINE_by_id("dynamic");
 117                         if (!e)
 118                                 goto err;
 119                         if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
 120                                 goto err;
 121                         if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
 122                                 goto err;
 123                         if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
 124                                 goto err;
 125                         }
 126                 /* ... add other pseudos here ... */
 127                 else
 128                         {
 129                         /* At this point we need an ENGINE structural reference
 130                          * if we don't already have one.
 131                          */
 132                         if (!e)
 133                                 {
 134                                 e = ENGINE_by_id(name);
 135                                 if (!e)
 136                                         return 0;
 137                                 }
 138                         /* Allow "EMPTY" to mean no value: this allows a valid
 139                          * "value" to be passed to ctrls of type NO_INPUT
 140                          */
 141                         if (!strcmp(ctrlvalue, "EMPTY"))
 142                                 ctrlvalue = NULL;
 143                         if (!strcmp(ctrlname, "default_algorithms"))
 144                                 {
 145                                 if (!ENGINE_set_default_string(e, ctrlvalue))
 146                                         goto err;
 147                                 }
 148                         else if (!ENGINE_ctrl_cmd_string(e,
 149                                         ctrlname, ctrlvalue, 0))
 150                                 return 0;
 151                         }
 152
 153
 154                 }
 155         ret = 1;
 156         err:
 157         if (e)
 158                 ENGINE_free(e);
 159         return ret;
 160         }
 161
 162
 163 static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
 164         {
 165         STACK_OF(CONF_VALUE) *elist;
 166         CONF_VALUE *cval;
 167         int i;
 168 #ifdef ENGINE_CONF_DEBUG
 169         fprintf(stderr, "Called engine module: name %s, value %s\n",
 170                         CONF_imodule_get_name(md), CONF_imodule_get_value(md));
 171 #endif
 172         /* Value is a section containing ENGINEs to configure */
 173         elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));
 174
 175         if (!elist)
 176                 {
 177                 ENGINEerr(ENGINE_F_ENGINE_MODULE_INIT, ENGINE_R_ENGINES_SECTION_ERROR);
 178                 return 0;
 179                 }
 180
 181         for (i = 0; i < sk_CONF_VALUE_num(elist); i++)
 182                 {
 183                 cval = sk_CONF_VALUE_value(elist, i);
 184                 if (!int_engine_configure(cval->name, cval->value, cnf))
 185                         return 0;
 186                 }
 187
 188         return 1;
 189         }
 190
 191 void ENGINE_add_conf_module(void)
 192         {
 193         CONF_module_add("engines", int_engine_module_init, 0);
 194         }