1 /* $OpenBSD: conf_api.c,v 1.14 2015/02/10 11:22:21 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 /* Part of the code in here was originally in conf.c, which is now removed */ 60 61 #ifndef CONF_DEBUG 62 # undef NDEBUG /* avoid conflicting definitions */ 63 # define NDEBUG 64 #endif 65 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include <openssl/conf.h> 70 #include <openssl/conf_api.h> 71 72 static void value_free_hash_doall_arg(CONF_VALUE *a, 73 LHASH_OF(CONF_VALUE) *conf); 74 static void value_free_stack_doall(CONF_VALUE *a); 75 static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE, 76 LHASH_OF(CONF_VALUE)) 77 static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE) 78 79 /* Up until OpenSSL 0.9.5a, this was get_section */ 80 CONF_VALUE * 81 _CONF_get_section(const CONF *conf, const char *section) 82 { 83 CONF_VALUE *v, vv; 84 85 if ((conf == NULL) || (section == NULL)) 86 return (NULL); 87 vv.name = NULL; 88 vv.section = (char *)section; 89 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 90 return (v); 91 } 92 93 /* Up until OpenSSL 0.9.5a, this was CONF_get_section */ 94 STACK_OF(CONF_VALUE) * 95 _CONF_get_section_values(const CONF *conf, const char *section) 96 { 97 CONF_VALUE *v; 98 99 v = _CONF_get_section(conf, section); 100 if (v != NULL) 101 return ((STACK_OF(CONF_VALUE) *)v->value); 102 else 103 return (NULL); 104 } 105 106 int 107 _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value) 108 { 109 CONF_VALUE *v = NULL; 110 STACK_OF(CONF_VALUE) *ts; 111 112 ts = (STACK_OF(CONF_VALUE) *)section->value; 113 114 value->section = section->section; 115 if (!sk_CONF_VALUE_push(ts, value)) { 116 return 0; 117 } 118 119 v = lh_CONF_VALUE_insert(conf->data, value); 120 if (v != NULL) { 121 (void)sk_CONF_VALUE_delete_ptr(ts, v); 122 free(v->name); 123 free(v->value); 124 free(v); 125 } 126 return 1; 127 } 128 129 char * 130 _CONF_get_string(const CONF *conf, const char *section, const char *name) 131 { 132 CONF_VALUE *v, vv; 133 134 if (name == NULL) 135 return (NULL); 136 if (conf != NULL) { 137 if (section != NULL) { 138 vv.name = (char *)name; 139 vv.section = (char *)section; 140 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 141 if (v != NULL) 142 return (v->value); 143 } 144 vv.section = "default"; 145 vv.name = (char *)name; 146 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 147 if (v != NULL) 148 return (v->value); 149 else 150 return (NULL); 151 } else 152 return (NULL); 153 } 154 155 static unsigned long 156 conf_value_hash(const CONF_VALUE *v) 157 { 158 return (lh_strhash(v->section) << 2) ^ lh_strhash(v->name); 159 } 160 161 static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE) 162 163 static int 164 conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b) 165 { 166 int i; 167 168 if (a->section != b->section) { 169 i = strcmp(a->section, b->section); 170 if (i) 171 return (i); 172 } 173 if ((a->name != NULL) && (b->name != NULL)) { 174 i = strcmp(a->name, b->name); 175 return (i); 176 } else if (a->name == b->name) 177 return (0); 178 else 179 return ((a->name == NULL)?-1 : 1); 180 } 181 182 static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE) 183 184 int 185 _CONF_new_data(CONF *conf) 186 { 187 if (conf == NULL) { 188 return 0; 189 } 190 if (conf->data == NULL) 191 if ((conf->data = lh_CONF_VALUE_new()) == NULL) { 192 return 0; 193 } 194 return 1; 195 } 196 197 void 198 _CONF_free_data(CONF *conf) 199 { 200 if (conf == NULL || conf->data == NULL) 201 return; 202 203 lh_CONF_VALUE_down_load(conf->data) = 0; /* evil thing to make 204 * sure the 'free()' works as 205 * expected */ 206 lh_CONF_VALUE_doall_arg(conf->data, 207 LHASH_DOALL_ARG_FN(value_free_hash), 208 LHASH_OF(CONF_VALUE), conf->data); 209 210 /* We now have only 'section' entries in the hash table. 211 * Due to problems with */ 212 213 lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack)); 214 lh_CONF_VALUE_free(conf->data); 215 } 216 217 static void 218 value_free_hash_doall_arg(CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf) 219 { 220 if (a->name != NULL) 221 (void)lh_CONF_VALUE_delete(conf, a); 222 } 223 224 static void 225 value_free_stack_doall(CONF_VALUE *a) 226 { 227 CONF_VALUE *vv; 228 STACK_OF(CONF_VALUE) *sk; 229 int i; 230 231 if (a->name != NULL) 232 return; 233 234 sk = (STACK_OF(CONF_VALUE) *)a->value; 235 for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) { 236 vv = sk_CONF_VALUE_value(sk, i); 237 free(vv->value); 238 free(vv->name); 239 free(vv); 240 } 241 if (sk != NULL) 242 sk_CONF_VALUE_free(sk); 243 free(a->section); 244 free(a); 245 } 246 247 /* Up until OpenSSL 0.9.5a, this was new_section */ 248 CONF_VALUE * 249 _CONF_new_section(CONF *conf, const char *section) 250 { 251 STACK_OF(CONF_VALUE) *sk = NULL; 252 int ok = 0, i; 253 CONF_VALUE *v = NULL, *vv; 254 255 if ((sk = sk_CONF_VALUE_new_null()) == NULL) 256 goto err; 257 if ((v = malloc(sizeof(CONF_VALUE))) == NULL) 258 goto err; 259 i = strlen(section) + 1; 260 if ((v->section = malloc(i)) == NULL) 261 goto err; 262 263 memcpy(v->section, section, i); 264 v->name = NULL; 265 v->value = (char *)sk; 266 267 vv = lh_CONF_VALUE_insert(conf->data, v); 268 OPENSSL_assert(vv == NULL); 269 ok = 1; 270 271 err: 272 if (!ok) { 273 if (sk != NULL) 274 sk_CONF_VALUE_free(sk); 275 free(v); 276 v = NULL; 277 } 278 return (v); 279 } 280