1 /* $OpenBSD: eng_cnf.c,v 1.12 2014/07/10 13:58:22 jsing Exp $ */ 2 /* Written by Stephen Henson (steve@openssl.org) 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 <string.h> 60 61 #include <openssl/err.h> 62 63 #include "eng_int.h" 64 #include <openssl/conf.h> 65 66 /* #define ENGINE_CONF_DEBUG */ 67 68 /* ENGINE config module */ 69 70 static char * 71 skip_dot(char *name) 72 { 73 char *p; 74 75 p = strchr(name, '.'); 76 if (p) 77 return p + 1; 78 return name; 79 } 80 81 static STACK_OF(ENGINE) *initialized_engines = NULL; 82 83 static int 84 int_engine_init(ENGINE *e) 85 { 86 if (!ENGINE_init(e)) 87 return 0; 88 if (!initialized_engines) 89 initialized_engines = sk_ENGINE_new_null(); 90 if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e)) { 91 ENGINE_finish(e); 92 return 0; 93 } 94 return 1; 95 } 96 97 98 static int 99 int_engine_configure(char *name, char *value, const CONF *cnf) 100 { 101 int i; 102 int ret = 0; 103 long do_init = -1; 104 STACK_OF(CONF_VALUE) *ecmds; 105 CONF_VALUE *ecmd = NULL; 106 char *ctrlname, *ctrlvalue; 107 ENGINE *e = NULL; 108 int soft = 0; 109 110 name = skip_dot(name); 111 #ifdef ENGINE_CONF_DEBUG 112 fprintf(stderr, "Configuring engine %s\n", name); 113 #endif 114 /* Value is a section containing ENGINE commands */ 115 ecmds = NCONF_get_section(cnf, value); 116 117 if (!ecmds) { 118 ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, 119 ENGINE_R_ENGINE_SECTION_ERROR); 120 return 0; 121 } 122 123 for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++) { 124 ecmd = sk_CONF_VALUE_value(ecmds, i); 125 ctrlname = skip_dot(ecmd->name); 126 ctrlvalue = ecmd->value; 127 #ifdef ENGINE_CONF_DEBUG 128 fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", 129 ctrlname, ctrlvalue); 130 #endif 131 132 /* First handle some special pseudo ctrls */ 133 134 /* Override engine name to use */ 135 if (!strcmp(ctrlname, "engine_id")) 136 name = ctrlvalue; 137 else if (!strcmp(ctrlname, "soft_load")) 138 soft = 1; 139 /* Load a dynamic ENGINE */ 140 else if (!strcmp(ctrlname, "dynamic_path")) { 141 e = ENGINE_by_id("dynamic"); 142 if (!e) 143 goto err; 144 if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0)) 145 goto err; 146 if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0)) 147 goto err; 148 if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0)) 149 goto err; 150 } 151 /* ... add other pseudos here ... */ 152 else { 153 /* At this point we need an ENGINE structural reference 154 * if we don't already have one. 155 */ 156 if (!e) { 157 e = ENGINE_by_id(name); 158 if (!e && soft) { 159 ERR_clear_error(); 160 return 1; 161 } 162 if (!e) 163 goto err; 164 } 165 /* Allow "EMPTY" to mean no value: this allows a valid 166 * "value" to be passed to ctrls of type NO_INPUT 167 */ 168 if (!strcmp(ctrlvalue, "EMPTY")) 169 ctrlvalue = NULL; 170 if (!strcmp(ctrlname, "init")) { 171 if (!NCONF_get_number_e(cnf, value, "init", 172 &do_init)) 173 goto err; 174 if (do_init == 1) { 175 if (!int_engine_init(e)) 176 goto err; 177 } else if (do_init != 0) { 178 ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, 179 ENGINE_R_INVALID_INIT_VALUE); 180 goto err; 181 } 182 } 183 else if (!strcmp(ctrlname, "default_algorithms")) { 184 if (!ENGINE_set_default_string(e, ctrlvalue)) 185 goto err; 186 } else if (!ENGINE_ctrl_cmd_string(e, 187 ctrlname, ctrlvalue, 0)) 188 goto err; 189 } 190 } 191 if (e && (do_init == -1) && !int_engine_init(e)) { 192 ecmd = NULL; 193 goto err; 194 } 195 ret = 1; 196 197 err: 198 if (ret != 1) { 199 ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, 200 ENGINE_R_ENGINE_CONFIGURATION_ERROR); 201 if (ecmd) 202 ERR_asprintf_error_data( 203 "section=%s, name=%s, value=%s", 204 ecmd->section, ecmd->name, ecmd->value); 205 } 206 if (e) 207 ENGINE_free(e); 208 return ret; 209 } 210 211 212 static int 213 int_engine_module_init(CONF_IMODULE *md, const CONF *cnf) 214 { 215 STACK_OF(CONF_VALUE) *elist; 216 CONF_VALUE *cval; 217 int i; 218 219 #ifdef ENGINE_CONF_DEBUG 220 fprintf(stderr, "Called engine module: name %s, value %s\n", 221 CONF_imodule_get_name(md), CONF_imodule_get_value(md)); 222 #endif 223 /* Value is a section containing ENGINEs to configure */ 224 elist = NCONF_get_section(cnf, CONF_imodule_get_value(md)); 225 226 if (!elist) { 227 ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT, 228 ENGINE_R_ENGINES_SECTION_ERROR); 229 return 0; 230 } 231 232 for (i = 0; i < sk_CONF_VALUE_num(elist); i++) { 233 cval = sk_CONF_VALUE_value(elist, i); 234 if (!int_engine_configure(cval->name, cval->value, cnf)) 235 return 0; 236 } 237 238 return 1; 239 } 240 241 static void 242 int_engine_module_finish(CONF_IMODULE *md) 243 { 244 ENGINE *e; 245 246 while ((e = sk_ENGINE_pop(initialized_engines))) 247 ENGINE_finish(e); 248 sk_ENGINE_free(initialized_engines); 249 initialized_engines = NULL; 250 } 251 252 void 253 ENGINE_add_conf_module(void) 254 { 255 CONF_module_add("engines", int_engine_module_init, 256 int_engine_module_finish); 257 } 258