src/server/daemon/ldap_resource.c

Tue, 12 Sep 2023 18:08:11 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 12 Sep 2023 18:08:11 +0200
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parent 475
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permissions
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update uwproj

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2023 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #ifdef __gnu_linux__
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30 #define _GNU_SOURCE
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31 #endif
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32
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33 #include "ldap_resource.h"
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34
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35 #include "../util/util.h"
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36
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37
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38
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39 static ResourceType ldap_resource_type = {
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40 (resource_pool_init_func)ldap_resourcepool_init,
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41 (resource_pool_destroy_func)ldap_resourcepool_destroy,
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42 (resource_pool_createresource_func)ldap_resourcepool_createresource,
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43 (resource_pool_freeresource_func)ldap_resourcepool_freeresource,
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44 (resource_pool_prepare_func)ldap_resourcepool_prepare,
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45 (resource_pool_finish_func)ldap_resourcepool_finish,
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46 (resource_pool_getresourcedata_func)ldap_resourcepool_getresourcedata
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47 };
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48
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49
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50 ResourceType* ldap_get_resource_type(void) {
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51 return &ldap_resource_type;
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52 }
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53
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54 LDAP* ws_ldap_resource_create_connection(
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55 const char *hostname,
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56 int port,
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57 int ssl,
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58 int ldap_version)
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59 {
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60 LDAP *ld = NULL;
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61
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62 #ifdef SOLARIS
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63 ld = ldap_init(config->hostname, config->port);
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64 #else
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65 char *ldap_uri = NULL;
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66 asprintf(&ldap_uri, "ldap://%s:%d", hostname, port);
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67 ld = ws_ldap_resource_create_uri_connection(ldap_uri, ldap_version);
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68 free(ldap_uri);
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69 #endif
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70
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71 if(ld) {
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72 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldap_version);
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73 }
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74
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75 return ld;
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76 }
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77
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78 LDAP* ws_ldap_resource_create_uri_connection(
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79 const char *uri,
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80 int ldap_version)
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81 {
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82 #ifdef SOLARIS
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83 log_ereport(LOG_FAILURE, "ldap_resource_create_connection_uri is not implemented on Solaris yet");
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84 return NULL;
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85 #else
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86
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87 LDAP *ld = NULL;
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88 int init_ret = ldap_initialize(&ld, uri);
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89 if(init_ret) {
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90 log_ereport(
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91 LOG_FAILURE,
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92 "ldap_resource_create_connection failed: uri: %s",
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93 uri);
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94 }
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95 return ld;
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96 #endif
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97 }
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98
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99 void ws_ldap_close(LDAP *ldap) {
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100 #ifdef SOLARIS
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101 ldap_unbind(ldap);
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102 #else
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103 ldap_unbind_ext_s(ldap, NULL, NULL);
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104 #endif
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105 }
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106
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107
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108 /*
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109 * Validates settings from the pb pblock
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110 * and creates an LDAPResourcePool object
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111 *
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112 * LDAPResourcePool contains all settings necessary for creating
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113 * ldap connections.
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114 */
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115 void * ldap_resourcepool_init(pool_handle_t *pool, const char *rpname, pblock *pb) {
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116 char *ldap_uri = pblock_findval("Uri", pb);
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117 char *host = pblock_findval("Host", pb);
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118 char *port = pblock_findval("Port", pb);
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119 char *binddn = pblock_findval("Binddn", pb);
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120 char *bindpw = pblock_findval("Bindpw", pb);
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121 char *bind = pblock_findval("Bind", pb);
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122
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123 log_ereport(
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124 LOG_INFORM,
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125 "create ldap resource pool: name=%s : %s%s%s%s : binddn=%s",
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126 rpname,
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127 ldap_uri ? "uri=" : "host=",
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128 ldap_uri ? ldap_uri : host,
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129 ldap_uri || !port ? "" : ":",
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130 !port ? "" : port,
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131 binddn ? binddn : "''");
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132
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133 if(!ldap_uri && !host) {
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134 log_ereport(LOG_MISCONFIG, "Resource pool %s: No host or ldap uri specified", rpname);
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135 return NULL;
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136 }
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137 if(ldap_uri && host) {
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138 log_ereport(LOG_MISCONFIG, "Resource pool %s: Either Uri or Host must be specified, not both", rpname);
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139 return NULL;
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140 }
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141
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142 int64_t port_i = 0;
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143 if(host) {
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144 if(port) {
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145 if(util_strtoint(port, &port_i)) {
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146 if(port_i < 1 || port_i > 65535) {
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147 log_ereport(LOG_MISCONFIG, "Resource pool %s: Port %s is out of range", rpname, port);
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148 }
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149 } else {
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150 log_ereport(LOG_MISCONFIG, "Resource pool %s: Port '%s' is not a valid number", rpname, port);
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151 }
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152 } else {
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153 port_i = LDAP_PORT;
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154 }
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155 }
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156
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157 LDAPResourcePool *ldap_pool = pool_malloc(pool, sizeof(LDAPResourcePool));
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158 if(!ldap_pool) {
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159 return NULL;
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160 }
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161
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162 ldap_pool->name = rpname;
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163 ldap_pool->pool = pool;
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164 ldap_pool->ldap_uri = ldap_uri;
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165 ldap_pool->host = host;
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166 ldap_pool->port = (int)port_i;
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167 ldap_pool->binddn = binddn;
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168 ldap_pool->bindpw = bindpw;
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169 WSBool bind_def = binddn != NULL;
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170 ldap_pool->bind = bind ? util_getboolean(bind, bind_def) : bind_def;
461
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171
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172 return ldap_pool;
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173 }
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174
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175 void ldap_resourcepool_destroy(LDAPResourcePool *pool) {
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176 // unused
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177 }
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178
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179 void * ldap_resourcepool_createresource(LDAPResourcePool *respool) {
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180 LDAP *ldap = NULL;
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181 if(respool->ldap_uri) {
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182 ldap = ws_ldap_resource_create_uri_connection(respool->ldap_uri, LDAP_VERSION3);
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183 } else {
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184 ldap = ws_ldap_resource_create_connection(respool->host, respool->port, FALSE, LDAP_VERSION3);
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185 }
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186
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187 if(!ldap) {
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188 log_ereport(
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189 LOG_FAILURE,
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190 "resource pool %s: %s: cannot create LDAP session",
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191 respool->name,
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192 respool->ldap_uri ? respool->ldap_uri : respool->host);
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193 return NULL;
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194 }
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195
462
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196 if(respool->bind) {
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197 struct berval *server_cred;
464
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198 int r = ldap_resource_bind(respool, ldap, &server_cred);
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199 if(r != LDAP_SUCCESS) {
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200 log_ereport(LOG_FAILURE, "resource pool %s: bind failed: %s", respool->name, ldap_err2string(r));
462
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201 ws_ldap_close(ldap);
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202 return NULL;
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203 }
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204 }
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205
461
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206 LDAPResource *res = pool_malloc(respool->pool, sizeof(LDAPResource));
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207 if(!res) {
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208 ws_ldap_close(ldap);
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209 log_ereport(LOG_CATASTROPHE, "ldap_resourcepool_createresource: OOM");
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210 return NULL;
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211 }
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212 res->ldap = ldap;
462
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213 res->res_pool = respool;
461
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214
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215 return res;
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216 }
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217
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218 void ldap_resourcepool_freeresource(LDAPResourcePool *pool, LDAPResource *res) {
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219 if(res->ldap) {
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220 ws_ldap_close(res->ldap);
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221 }
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222 pool_free(pool->pool, res);
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223 }
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224
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225 int ldap_resourcepool_prepare(LDAPResourcePool *pool, LDAPResource *res) {
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226 // unused
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227 return 0;
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228 }
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229
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230 int ldap_resourcepool_finish(LDAPResourcePool *pool, LDAPResource *res) {
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231 // unused
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232 return 0;
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233 }
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234
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235 void * ldap_resourcepool_getresourcedata(LDAPResource *res) {
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236 return res->ldap;
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237 }
462
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238
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239
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240 int ldap_resource_bind(LDAPResourcePool *respool, LDAP *ldap, struct berval **server_cred) {
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241 if(!respool->binddn) {
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242 return -1;
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243 }
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244 return ws_ldap_bind(ldap, respool->binddn, respool->bindpw, server_cred);
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245 }
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246
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247 int ws_ldap_bind(LDAP *ldap, const char *binddn, const char *bindpw, struct berval **server_cred) {
462
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248 struct berval cred;
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249 cred.bv_val = (char*)bindpw;
462
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250 cred.bv_len = strlen(cred.bv_val);
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251 return ldap_sasl_bind_s(
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252 ldap,
464
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253 binddn,
462
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254 LDAP_SASL_SIMPLE,
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255 &cred,
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256 NULL,
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257 NULL,
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258 server_cred);
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259 }
464
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260

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