1 /* 2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 /* Part of the code in here was originally in conf.c, which is now removed */ 11 12 #include "e_os.h" 13 #include "internal/cryptlib.h" 14 #include <stdlib.h> 15 #include <string.h> 16 #include <openssl/conf.h> 17 #include <openssl/conf_api.h> 18 19 static void value_free_hash(const CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf); 20 static void value_free_stack_doall(CONF_VALUE *a); 21 22 /* Up until OpenSSL 0.9.5a, this was get_section */ 23 CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section) 24 { 25 CONF_VALUE *v, vv; 26 27 if ((conf == NULL) || (section == NULL)) 28 return NULL; 29 vv.name = NULL; 30 vv.section = (char *)section; 31 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 32 return v; 33 } 34 35 /* Up until OpenSSL 0.9.5a, this was CONF_get_section */ 36 STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf, 37 const char *section) 38 { 39 CONF_VALUE *v; 40 41 v = _CONF_get_section(conf, section); 42 if (v != NULL) 43 return ((STACK_OF(CONF_VALUE) *)v->value); 44 else 45 return NULL; 46 } 47 48 int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value) 49 { 50 CONF_VALUE *v = NULL; 51 STACK_OF(CONF_VALUE) *ts; 52 53 ts = (STACK_OF(CONF_VALUE) *)section->value; 54 55 value->section = section->section; 56 if (!sk_CONF_VALUE_push(ts, value)) { 57 return 0; 58 } 59 60 v = lh_CONF_VALUE_insert(conf->data, value); 61 if (v != NULL) { 62 (void)sk_CONF_VALUE_delete_ptr(ts, v); 63 OPENSSL_free(v->name); 64 OPENSSL_free(v->value); 65 OPENSSL_free(v); 66 } 67 return 1; 68 } 69 70 char *_CONF_get_string(const CONF *conf, const char *section, 71 const char *name) 72 { 73 CONF_VALUE *v, vv; 74 char *p; 75 76 if (name == NULL) 77 return NULL; 78 if (conf != NULL) { 79 if (section != NULL) { 80 vv.name = (char *)name; 81 vv.section = (char *)section; 82 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 83 if (v != NULL) 84 return v->value; 85 if (strcmp(section, "ENV") == 0) { 86 p = ossl_safe_getenv(name); 87 if (p != NULL) 88 return p; 89 } 90 } 91 vv.section = "default"; 92 vv.name = (char *)name; 93 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 94 if (v != NULL) 95 return v->value; 96 else 97 return NULL; 98 } else 99 return ossl_safe_getenv(name); 100 } 101 102 static unsigned long conf_value_hash(const CONF_VALUE *v) 103 { 104 return (OPENSSL_LH_strhash(v->section) << 2) ^ OPENSSL_LH_strhash(v->name); 105 } 106 107 static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b) 108 { 109 int i; 110 111 if (a->section != b->section) { 112 i = strcmp(a->section, b->section); 113 if (i) 114 return i; 115 } 116 117 if ((a->name != NULL) && (b->name != NULL)) { 118 i = strcmp(a->name, b->name); 119 return i; 120 } else if (a->name == b->name) 121 return 0; 122 else 123 return ((a->name == NULL) ? -1 : 1); 124 } 125 126 int _CONF_new_data(CONF *conf) 127 { 128 if (conf == NULL) { 129 return 0; 130 } 131 if (conf->data == NULL) { 132 conf->data = lh_CONF_VALUE_new(conf_value_hash, conf_value_cmp); 133 if (conf->data == NULL) 134 return 0; 135 } 136 return 1; 137 } 138 139 typedef LHASH_OF(CONF_VALUE) LH_CONF_VALUE; 140 141 IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, LH_CONF_VALUE); 142 143 void _CONF_free_data(CONF *conf) 144 { 145 if (conf == NULL || conf->data == NULL) 146 return; 147 148 /* evil thing to make sure the 'OPENSSL_free()' works as expected */ 149 lh_CONF_VALUE_set_down_load(conf->data, 0); 150 lh_CONF_VALUE_doall_LH_CONF_VALUE(conf->data, value_free_hash, conf->data); 151 152 /* 153 * We now have only 'section' entries in the hash table. Due to problems 154 * with 155 */ 156 157 lh_CONF_VALUE_doall(conf->data, value_free_stack_doall); 158 lh_CONF_VALUE_free(conf->data); 159 } 160 161 static void value_free_hash(const CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf) 162 { 163 if (a->name != NULL) 164 (void)lh_CONF_VALUE_delete(conf, a); 165 } 166 167 static void value_free_stack_doall(CONF_VALUE *a) 168 { 169 CONF_VALUE *vv; 170 STACK_OF(CONF_VALUE) *sk; 171 int i; 172 173 if (a->name != NULL) 174 return; 175 176 sk = (STACK_OF(CONF_VALUE) *)a->value; 177 for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) { 178 vv = sk_CONF_VALUE_value(sk, i); 179 OPENSSL_free(vv->value); 180 OPENSSL_free(vv->name); 181 OPENSSL_free(vv); 182 } 183 sk_CONF_VALUE_free(sk); 184 OPENSSL_free(a->section); 185 OPENSSL_free(a); 186 } 187 188 /* Up until OpenSSL 0.9.5a, this was new_section */ 189 CONF_VALUE *_CONF_new_section(CONF *conf, const char *section) 190 { 191 STACK_OF(CONF_VALUE) *sk = NULL; 192 int i; 193 CONF_VALUE *v = NULL, *vv; 194 195 if ((sk = sk_CONF_VALUE_new_null()) == NULL) 196 goto err; 197 if ((v = OPENSSL_malloc(sizeof(*v))) == NULL) 198 goto err; 199 i = strlen(section) + 1; 200 if ((v->section = OPENSSL_malloc(i)) == NULL) 201 goto err; 202 203 memcpy(v->section, section, i); 204 v->name = NULL; 205 v->value = (char *)sk; 206 207 vv = lh_CONF_VALUE_insert(conf->data, v); 208 if (vv != NULL || lh_CONF_VALUE_error(conf->data) > 0) 209 goto err; 210 return v; 211 212 err: 213 sk_CONF_VALUE_free(sk); 214 if (v != NULL) 215 OPENSSL_free(v->section); 216 OPENSSL_free(v); 217 return NULL; 218 } 219