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 static STACK_OF(ENGINE) *initialized_engines = NULL; 79 80 static int int_engine_init(ENGINE *e) 81 { 82 if (!ENGINE_init(e)) 83 return 0; 84 if (!initialized_engines) 85 initialized_engines = sk_ENGINE_new_null(); 86 if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e)) 87 { 88 ENGINE_finish(e); 89 return 0; 90 } 91 return 1; 92 } 93 94 95 static int int_engine_configure(char *name, char *value, const CONF *cnf) 96 { 97 int i; 98 int ret = 0; 99 long do_init = -1; 100 STACK_OF(CONF_VALUE) *ecmds; 101 CONF_VALUE *ecmd; 102 char *ctrlname, *ctrlvalue; 103 ENGINE *e = NULL; 104 name = skip_dot(name); 105 #ifdef ENGINE_CONF_DEBUG 106 fprintf(stderr, "Configuring engine %s\n", name); 107 #endif 108 /* Value is a section containing ENGINE commands */ 109 ecmds = NCONF_get_section(cnf, value); 110 111 if (!ecmds) 112 { 113 ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_ENGINE_SECTION_ERROR); 114 return 0; 115 } 116 117 for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++) 118 { 119 ecmd = sk_CONF_VALUE_value(ecmds, i); 120 ctrlname = skip_dot(ecmd->name); 121 ctrlvalue = ecmd->value; 122 #ifdef ENGINE_CONF_DEBUG 123 fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname, ctrlvalue); 124 #endif 125 126 /* First handle some special pseudo ctrls */ 127 128 /* Override engine name to use */ 129 if (!strcmp(ctrlname, "engine_id")) 130 name = ctrlvalue; 131 /* Load a dynamic ENGINE */ 132 else if (!strcmp(ctrlname, "dynamic_path")) 133 { 134 e = ENGINE_by_id("dynamic"); 135 if (!e) 136 goto err; 137 if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0)) 138 goto err; 139 if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0)) 140 goto err; 141 if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0)) 142 goto err; 143 } 144 /* ... add other pseudos here ... */ 145 else 146 { 147 /* At this point we need an ENGINE structural reference 148 * if we don't already have one. 149 */ 150 if (!e) 151 { 152 e = ENGINE_by_id(name); 153 if (!e) 154 return 0; 155 } 156 /* Allow "EMPTY" to mean no value: this allows a valid 157 * "value" to be passed to ctrls of type NO_INPUT 158 */ 159 if (!strcmp(ctrlvalue, "EMPTY")) 160 ctrlvalue = NULL; 161 else if (!strcmp(ctrlname, "init")) 162 { 163 if (!NCONF_get_number_e(cnf, value, "init", &do_init)) 164 goto err; 165 if (do_init == 1) 166 { 167 if (!int_engine_init(e)) 168 goto err; 169 } 170 else if (do_init != 0) 171 { 172 ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_INVALID_INIT_VALUE); 173 goto err; 174 } 175 } 176 else if (!strcmp(ctrlname, "default_algorithms")) 177 { 178 if (!ENGINE_set_default_string(e, ctrlvalue)) 179 goto err; 180 } 181 else if (!ENGINE_ctrl_cmd_string(e, 182 ctrlname, ctrlvalue, 0)) 183 return 0; 184 } 185 186 187 188 } 189 if (e && (do_init == -1) && !int_engine_init(e)) 190 goto err; 191 ret = 1; 192 err: 193 if (e) 194 ENGINE_free(e); 195 return ret; 196 } 197 198 199 static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf) 200 { 201 STACK_OF(CONF_VALUE) *elist; 202 CONF_VALUE *cval; 203 int i; 204 #ifdef ENGINE_CONF_DEBUG 205 fprintf(stderr, "Called engine module: name %s, value %s\n", 206 CONF_imodule_get_name(md), CONF_imodule_get_value(md)); 207 #endif 208 /* Value is a section containing ENGINEs to configure */ 209 elist = NCONF_get_section(cnf, CONF_imodule_get_value(md)); 210 211 if (!elist) 212 { 213 ENGINEerr(ENGINE_F_ENGINE_MODULE_INIT, ENGINE_R_ENGINES_SECTION_ERROR); 214 return 0; 215 } 216 217 for (i = 0; i < sk_CONF_VALUE_num(elist); i++) 218 { 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 } 235 236 237 void ENGINE_add_conf_module(void) 238 { 239 CONF_module_add("engines", 240 int_engine_module_init, 241 int_engine_module_finish); 242 } 243