src/server/daemon/ldap_auth.c

Sun, 15 May 2022 08:56:00 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 15 May 2022 08:56:00 +0200
branch
webdav
changeset 361
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parent 256
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child 415
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permissions
-rw-r--r--

make sure the http stream is finished if headers are sent

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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 2013 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 <stdio.h>
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34 #include <stdlib.h>
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35 #include <string.h>
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36 #include <sys/time.h>
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37
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38 #include <ucx/utils.h>
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39
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40 #include "ldap_auth.h"
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41
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42 static void ws_ldap_close(LDAP *ldap) {
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43 #ifdef SOLARIS
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44 ldap_unbind(ldap);
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45 #else
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46 ldap_unbind_ext_s(ldap, NULL, NULL);
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47 #endif
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48 }
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49
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50 AuthDB* create_ldap_authdb(ServerConfiguration *cfg, const char *name, LDAPConfig *conf) {
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51 LDAPAuthDB *authdb = almalloc(cfg->a, sizeof(LDAPAuthDB));
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52 authdb->authdb.name = pool_strdup(cfg->pool, name);
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53 authdb->authdb.get_user = ldap_get_user;
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54 authdb->authdb.use_cache = 1;
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55 authdb->config = *conf;
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56
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57 if (!authdb->config.usersearch) {
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58 authdb->config.usersearch = "uid";
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59 }
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60 if (!authdb->config.groupsearch) {
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61 authdb->config.groupsearch = "uniquemember";
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62 }
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63
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64 // initialize group cache
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65 authdb->groups.first = NULL;
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66 authdb->groups.last = NULL;
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67 authdb->groups.map = ucx_map_new_a(cfg->a, 32);
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68
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69 return (AuthDB*) authdb;
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70 }
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71
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72 LDAP* get_ldap_session(LDAPAuthDB *authdb) {
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73 LDAPConfig *config = &authdb->config;
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74 LDAP *ld = NULL;
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75
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76 #ifdef SOLARIS
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77 ld = ldap_init(config->hostname, config->port);
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78 #else
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79 char *ldap_uri = NULL;
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80 asprintf(&ldap_uri, "ldap://%s:%d", config->hostname, config->port);
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81 int init_ret = ldap_initialize(&ld, ldap_uri);
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82 free(ldap_uri);
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83 if(init_ret) {
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84 fprintf(stderr, "ldap_initialize failed\n");
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85 }
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86 #endif
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87 if(!ld) {
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88 return NULL;
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89 }
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91 int ldapv = LDAP_VERSION3;
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92 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldapv);
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93
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94 // admin bind
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95 struct berval cred;
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96 cred.bv_val = config->bindpw;
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97 cred.bv_len = strlen(config->bindpw);
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98 struct berval *server_cred;
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99 int r = ldap_sasl_bind_s(
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100 ld,
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101 config->binddn,
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102 LDAP_SASL_SIMPLE,
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103 &cred,
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104 NULL,
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105 NULL,
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106 &server_cred);
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107 if (r != LDAP_SUCCESS) {
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108 ws_ldap_close(ld);
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109 fprintf(stderr, "ldap_simple_bind_s failed: %s\n", ldap_err2string(r));
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110 return NULL;
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111 }
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112
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113 return ld;
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114 }
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115
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116 User* ldap_get_user(AuthDB *db, char *username) {
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117 LDAPAuthDB *authdb = (LDAPAuthDB*) db;
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118 LDAPConfig *config = &authdb->config;
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119
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120 LDAP *ld = get_ldap_session(authdb);
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121 if (ld == NULL) {
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122 fprintf(stderr, "ldap_init failed\n");
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123 return NULL;
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124 }
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125
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126 // get the user dn
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127 // TODO: use config for filter
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128 // TODO: use asprintf
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129 char filter[128];
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130 int s = snprintf(filter, 127, "uid=%s", username);
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131 filter[s] = 0;
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132
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133 LDAPMessage *result;
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134 struct timeval timeout;
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135 timeout.tv_sec = 8;
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136 timeout.tv_usec = 0;
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137 int r = ldap_search_ext_s(
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138 ld,
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139 config->basedn,
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140 LDAP_SCOPE_SUBTREE,
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141 filter,
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142 NULL,
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143 0,
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144 NULL, // server controls
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145 NULL, // client controls
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146 &timeout,
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147 1, // size limit
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148 &result);
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149 if (r != LDAP_SUCCESS) {
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150 ws_ldap_close(ld);
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151
86
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152 fprintf(stderr, "ldap_search_ext_s failed\n");
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153 return NULL;
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154 }
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155
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156 LDAPMessage *msg = ldap_first_entry(ld, result);
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157 if (msg) {
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158 LDAPUser *user = malloc(sizeof(LDAPUser));
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159 if (user != NULL) {
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160 user->authdb = authdb;
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161 user->user.verify_password = ldap_user_verify_password;
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162 user->user.check_group = ldap_user_check_group;
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163 user->user.free = ldap_user_free;
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164 user->user.name = username; // must not be freed
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165
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166 // TODO: get uid/gid from ldap
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167 user->user.uid = -1;
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168 user->user.gid = -1;
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169
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170 user->ldap = ld;
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171 user->userdn = ldap_get_dn(ld, msg);
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172
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173 ldap_msgfree(result);
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174
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175 return (User*)user;
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176 }
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177 }
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178
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179 ws_ldap_close(ld);
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180 return NULL;
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181 }
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182
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183 LDAPGroup* ldap_get_group(LDAPAuthDB *authdb, char *group) {
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184 printf("ldap_get_group: %s\n", group);
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185
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186 LDAPConfig *config = &authdb->config;
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187
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188 LDAP *ld = get_ldap_session(authdb);
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189 if (ld == NULL) {
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190 fprintf(stderr, "ldap_init failed\n");
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191 return NULL;
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192 }
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193
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194 // get the user dn
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195 // TODO: use config for filter
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196 // TODO: use asprintf
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197 char filter[128];
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198 int s = snprintf(filter, 127, "cn=%s", group);
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199 filter[s] = 0;
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200
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201 LDAPMessage *result;
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202 struct timeval timeout;
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203 timeout.tv_sec = 8;
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204 timeout.tv_usec = 0;
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205 int r = ldap_search_ext_s(
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206 ld,
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207 config->basedn,
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208 LDAP_SCOPE_SUBTREE,
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209 filter,
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210 NULL,
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211 0,
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212 NULL, // server controls
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213 NULL, // client controls
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214 &timeout,
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215 1, // size limit
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216 &result);
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217 if (r != LDAP_SUCCESS) {
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218 ws_ldap_close(ld);
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219
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220 fprintf(stderr, "ldap_search_ext_s failed\n");
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221 return NULL;
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222 }
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223
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224 LDAPGroup *wsgroup = NULL;
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225 LDAPMessage *msg = ldap_first_entry(ld, result);
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226 if (msg) {
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227 // create group object
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228 wsgroup = malloc(sizeof(LDAPGroup));
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229 wsgroup->name = strdup(group);
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230 wsgroup->members = NULL;
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231 wsgroup->nmembers = 0;
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232 wsgroup->update = 0;
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233 wsgroup->next = NULL;
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234
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235 // get attributes
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236 BerElement *ber = NULL;
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237 char *attribute = attribute=ldap_first_attribute(ld, msg, &ber);
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238 while(attribute != NULL) {
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239 printf("attribute: %s\n", attribute);
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240 if(!strcasecmp(attribute, "memberuid")) {
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241 // get all memberuid values and add the users to the group obj
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242
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243 struct berval **values = ldap_get_values_len(ld, msg, attribute);
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244 if(values) {
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245 int count = ldap_count_values_len(values);
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246 wsgroup->members = calloc(count, sizeof(LDAPMember));
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247 wsgroup->nmembers = count;
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248 for(int i=0;i<count;i++) {
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249 sstr_t member = sstrn(
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250 values[i]->bv_val,
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251 values[i]->bv_len);
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252 wsgroup->members[i].name = sstrdup(member).ptr;
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253 // TODO: uid?
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254 printf("added member: %.*s\n", (int)member.length, member.ptr);
97
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255 }
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256 }
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257 }
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258
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259 attribute = ldap_next_attribute(ld, msg, ber);
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260 }
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261
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262 if(ber) {
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263 //ldap_ber_free(ber, 0);
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264 }
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265 if(attribute) {
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266 ldap_memfree(attribute);
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267 }
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268 }
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269
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270 ws_ldap_close(ld);
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271 return wsgroup;
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272 }
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273
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274 int ldap_user_verify_password(User *u, char *password) {
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275 LDAPUser *user = (LDAPUser*)u;
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276
86
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diff changeset
277 //int r = ldap_simple_bind_s(user->ldap, user->userdn, password);
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278 struct berval cred;
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279 cred.bv_val = password;
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280 cred.bv_len = strlen(password);
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281 struct berval *server_cred;
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282 int r = ldap_sasl_bind_s(
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diff changeset
283 user->ldap,
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284 user->userdn,
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285 LDAP_SASL_SIMPLE,
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286 &cred,
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287 NULL,
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288 NULL,
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diff changeset
289 &server_cred);
38
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290 if(r == LDAP_SUCCESS) {
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291 printf("ldap password ok\n");
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292 return 1;
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293 } else {
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294 printf("ldap password not ok\n");
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295 return 0;
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296 }
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297 }
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298
97
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diff changeset
299 int ldap_user_check_group(User *u, char *group_str) {
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300 LDAPUser *user = (LDAPUser*)u;
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301
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diff changeset
302 int ret = 0;
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303
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304 LDAPGroup *group = ldap_get_group(user->authdb, group_str);
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305 for(int i=0;i<group->nmembers;i++) {
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306 char *member = group->members[i].name;
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307 if(!strcmp(member, u->name)) {
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308 printf("is member\n");
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309 ret = 1;
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310 }
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311 }
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312
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313 // TODO: free or cache group
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314
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315 return ret;
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316 }
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317
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318 void ldap_user_free(User *u) {
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319 LDAPUser *user = (LDAPUser*)u;
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320 ldap_memfree(user->userdn);
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321 // TODO: use connection pool
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322 ws_ldap_close(user->ldap);
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323 free(user);
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324 }

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