1 /* 2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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 #include "conf_local.h" 19 20 static void value_free_hash(const CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf); 21 static void value_free_stack_doall(CONF_VALUE *a); 22 23 CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section) 24 { 25 CONF_VALUE vv; 26 27 if (conf == NULL || section == NULL) 28 return NULL; 29 vv.name = NULL; 30 vv.section = (char *)section; 31 return conf->data != NULL ? lh_CONF_VALUE_retrieve(conf->data, &vv) : NULL; 32 } 33 34 STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf, 35 const char *section) 36 { 37 CONF_VALUE *v; 38 39 v = _CONF_get_section(conf, section); 40 if (v == NULL) 41 return NULL; 42 return ((STACK_OF(CONF_VALUE) *)v->value); 43 } 44 45 int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value) 46 { 47 CONF_VALUE *v = NULL; 48 STACK_OF(CONF_VALUE) *ts; 49 50 ts = (STACK_OF(CONF_VALUE) *)section->value; 51 52 value->section = section->section; 53 if (!sk_CONF_VALUE_push(ts, value)) 54 return 0; 55 56 v = lh_CONF_VALUE_insert(conf->data, value); 57 if (v != NULL) { 58 (void)sk_CONF_VALUE_delete_ptr(ts, v); 59 OPENSSL_free(v->name); 60 OPENSSL_free(v->value); 61 OPENSSL_free(v); 62 } 63 return 1; 64 } 65 66 char *_CONF_get_string(const CONF *conf, const char *section, 67 const char *name) 68 { 69 CONF_VALUE *v, vv; 70 char *p; 71 72 if (name == NULL) 73 return NULL; 74 if (conf == NULL) 75 return ossl_safe_getenv(name); 76 if (conf->data == NULL) 77 return NULL; 78 if (section != NULL) { 79 vv.name = (char *)name; 80 vv.section = (char *)section; 81 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 82 if (v != NULL) 83 return v->value; 84 if (strcmp(section, "ENV") == 0) { 85 p = ossl_safe_getenv(name); 86 if (p != NULL) 87 return p; 88 } 89 } 90 vv.section = "default"; 91 vv.name = (char *)name; 92 v = lh_CONF_VALUE_retrieve(conf->data, &vv); 93 if (v == NULL) 94 return NULL; 95 return v->value; 96 } 97 98 static unsigned long conf_value_hash(const CONF_VALUE *v) 99 { 100 return (OPENSSL_LH_strhash(v->section) << 2) ^ OPENSSL_LH_strhash(v->name); 101 } 102 103 static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b) 104 { 105 int i; 106 107 if (a->section != b->section) { 108 i = strcmp(a->section, b->section); 109 if (i != 0) 110 return i; 111 } 112 113 if (a->name != NULL && b->name != NULL) 114 return strcmp(a->name, b->name); 115 if (a->name == b->name) 116 return 0; 117 return (a->name == NULL) ? -1 : 1; 118 } 119 120 int _CONF_new_data(CONF *conf) 121 { 122 if (conf == NULL) 123 return 0; 124 if (conf->data == NULL) { 125 conf->data = lh_CONF_VALUE_new(conf_value_hash, conf_value_cmp); 126 if (conf->data == NULL) 127 return 0; 128 } 129 return 1; 130 } 131 132 typedef LHASH_OF(CONF_VALUE) LH_CONF_VALUE; 133 134 IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, LH_CONF_VALUE); 135 136 void _CONF_free_data(CONF *conf) 137 { 138 if (conf == NULL) 139 return; 140 141 OPENSSL_free(conf->includedir); 142 if (conf->data == NULL) 143 return; 144 145 /* evil thing to make sure the 'OPENSSL_free()' works as expected */ 146 lh_CONF_VALUE_set_down_load(conf->data, 0); 147 lh_CONF_VALUE_doall_LH_CONF_VALUE(conf->data, value_free_hash, conf->data); 148 149 /* 150 * We now have only 'section' entries in the hash table. Due to problems 151 * with 152 */ 153 154 lh_CONF_VALUE_doall(conf->data, value_free_stack_doall); 155 lh_CONF_VALUE_free(conf->data); 156 } 157 158 static void value_free_hash(const CONF_VALUE *a, LHASH_OF(CONF_VALUE) *conf) 159 { 160 if (a->name != NULL) 161 (void)lh_CONF_VALUE_delete(conf, a); 162 } 163 164 static void value_free_stack_doall(CONF_VALUE *a) 165 { 166 CONF_VALUE *vv; 167 STACK_OF(CONF_VALUE) *sk; 168 int i; 169 170 if (a->name != NULL) 171 return; 172 173 sk = (STACK_OF(CONF_VALUE) *)a->value; 174 for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) { 175 vv = sk_CONF_VALUE_value(sk, i); 176 OPENSSL_free(vv->value); 177 OPENSSL_free(vv->name); 178 OPENSSL_free(vv); 179 } 180 sk_CONF_VALUE_free(sk); 181 OPENSSL_free(a->section); 182 OPENSSL_free(a); 183 } 184 185 CONF_VALUE *_CONF_new_section(CONF *conf, const char *section) 186 { 187 STACK_OF(CONF_VALUE) *sk = NULL; 188 int i; 189 CONF_VALUE *v = NULL, *vv; 190 191 if ((sk = sk_CONF_VALUE_new_null()) == NULL) 192 goto err; 193 if ((v = OPENSSL_malloc(sizeof(*v))) == NULL) 194 goto err; 195 i = strlen(section) + 1; 196 if ((v->section = OPENSSL_malloc(i)) == NULL) 197 goto err; 198 199 memcpy(v->section, section, i); 200 v->name = NULL; 201 v->value = (char *)sk; 202 203 vv = lh_CONF_VALUE_insert(conf->data, v); 204 if (vv != NULL || lh_CONF_VALUE_error(conf->data) > 0) 205 goto err; 206 return v; 207 208 err: 209 sk_CONF_VALUE_free(sk); 210 if (v != NULL) 211 OPENSSL_free(v->section); 212 OPENSSL_free(v); 213 return NULL; 214 } 215