Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/auth/userdb-checkpassword.c @ 8958:16c286aee307 HEAD

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Implemented support for per-namespace quotas. Can be used with public namespaces.
author Timo Sirainen <tss@iki.fi>
date Thu, 16 Apr 2009 21:31:30 -0400
parents b9faf4db2a9f
children 00cd9aacd03c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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b9faf4db2a9f Updated copyright notices to include year 2009.
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1 /* Copyright (c) 2004-2009 Dovecot authors, see the included COPYING file */
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2
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3 #include "common.h"
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4 #include "userdb.h"
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5
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6 #ifdef USERDB_CHECKPASSWORD
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7
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8 #include "db-checkpassword.h"
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9
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10 struct checkpassword_userdb_module {
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11 struct userdb_module module;
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12
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13 const char *checkpassword_path, *checkpassword_reply_path;
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14 struct hash_table *clients;
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15 };
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16
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17 static struct child_wait *checkpassword_userdb_children = NULL;
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18
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19 static void checkpassword_request_finish(struct chkpw_auth_request *request,
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20 enum userdb_result result)
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21 {
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22 struct userdb_module *_module = request->request->userdb->userdb;
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23 struct checkpassword_userdb_module *module =
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24 (struct checkpassword_userdb_module *)_module;
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25 userdb_callback_t *callback =
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26 (userdb_callback_t *)request->callback;
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27
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28 hash_table_remove(module->clients, POINTER_CAST(request->pid));
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29
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30 if (result == USERDB_RESULT_OK) {
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31 if (strchr(str_c(request->input_buf), '\n') != NULL) {
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32 auth_request_log_error(request->request,
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33 "userdb-checkpassword",
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34 "LF characters in checkpassword reply");
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35 result = USERDB_RESULT_INTERNAL_FAILURE;
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36 } else {
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37 auth_request_init_userdb_reply(request->request);
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38 auth_request_set_fields(request->request,
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39 t_strsplit(str_c(request->input_buf), "\t"),
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40 NULL);
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41 }
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42 }
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43
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44 callback(result, request->request);
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45
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46 auth_request_unref(&request->request);
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47 checkpassword_request_free(request);
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48 }
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49
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50 static void
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51 checkpassword_request_half_finish(struct chkpw_auth_request *request)
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52 {
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53 if (!request->exited || request->fd_in != -1)
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54 return;
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55
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56 switch (request->exit_status) {
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57 case 3:
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58 /* User does not exist. */
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59 auth_request_log_info(request->request, "userdb-checkpassword",
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60 "User unknown");
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61 checkpassword_request_finish(request,
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62 USERDB_RESULT_USER_UNKNOWN);
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63 break;
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64 case 2:
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65 /* This is intentionally not 0. checkpassword-reply exits with
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66 2 on success when AUTHORIZED is set. */
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67 if (request->input_buf != NULL) {
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68 checkpassword_request_finish(request, USERDB_RESULT_OK);
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69 break;
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70 }
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71 /* missing input - fall through */
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72 default:
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73 /* whatever error... */
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74 auth_request_log_error(request->request, "userdb-checkpassword",
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75 "Child %s exited with status %d",
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76 dec2str(request->pid), request->exit_status);
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77 checkpassword_request_finish(request,
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78 USERDB_RESULT_INTERNAL_FAILURE);
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79 break;
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80 }
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81 }
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82
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83 static void sigchld_handler(const struct child_wait_status *status,
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84 struct checkpassword_userdb_module *module)
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85 {
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86 struct chkpw_auth_request *request =
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87 hash_table_lookup(module->clients, POINTER_CAST(status->pid));
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88
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89 switch (checkpassword_sigchld_handler(status, request)) {
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90 case SIGCHLD_RESULT_UNKNOWN_CHILD:
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91 case SIGCHLD_RESULT_DEAD_CHILD:
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92 break;
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93 case SIGCHLD_RESULT_UNKNOWN_ERROR:
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94 checkpassword_request_finish(request,
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95 USERDB_RESULT_INTERNAL_FAILURE);
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96 break;
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97 case SIGCHLD_RESULT_OK:
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98 checkpassword_request_half_finish(request);
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99 request = NULL;
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100 break;
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101 }
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102 }
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103
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104 static void ATTR_NORETURN
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105 checkpassword_lookup_child(struct auth_request *request,
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106 struct checkpassword_userdb_module *module,
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107 int fd_in, int fd_out)
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108 {
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109 const char *cmd, *const *args;
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110
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111 if (dup2(fd_out, 3) < 0 || dup2(fd_in, 4) < 0) {
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112 auth_request_log_error(request, "userdb-checkpassword",
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113 "dup2() failed: %m");
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114 } else {
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115 /* We want to retrieve user data and don't do
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116 authorization, so we need to signalize the
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117 checkpassword program that the password shall be
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118 ignored by setting AUTHORIZED. This needs a
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119 special checkpassword program which knows how to
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120 handle this. */
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121 env_put("AUTHORIZED=1");
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122 checkpassword_setup_env(request);
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123 /* very simple argument splitting. */
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124 cmd = t_strconcat(module->checkpassword_path, " ",
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125 module->checkpassword_reply_path, NULL);
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126 auth_request_log_debug(request, "userdb-checkpassword",
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127 "execute: %s", cmd);
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128
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129 args = t_strsplit(cmd, " ");
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130 execv(args[0], (char **)args);
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131 auth_request_log_error(request, "userdb-checkpassword",
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132 "execv(%s) failed: %m", args[0]);
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133 }
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134 exit(2);
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135 }
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diff changeset
136
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diff changeset
137 static void
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138 checkpassword_lookup(struct auth_request *request, userdb_callback_t *callback)
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139 {
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140 struct userdb_module *_module = request->userdb->userdb;
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141 struct checkpassword_userdb_module *module =
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142 (struct checkpassword_userdb_module *)_module;
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143 struct chkpw_auth_request *chkpw_auth_request;
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144 int fd_in[2], fd_out[2];
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145 pid_t pid;
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146
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147 fd_in[0] = -1;
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148 if (pipe(fd_in) < 0 || pipe(fd_out) < 0) {
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149 auth_request_log_error(request, "userdb-checkpassword",
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diff changeset
150 "pipe() failed: %m");
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151 callback(USERDB_RESULT_INTERNAL_FAILURE, request);
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152 if (fd_in[0] != -1) {
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153 (void)close(fd_in[0]);
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154 (void)close(fd_in[1]);
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155 }
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156 return;
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157 }
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158
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159 pid = fork();
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160 if (pid == -1) {
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161 auth_request_log_error(request, "userdb-checkpassword",
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162 "fork() failed: %m");
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163 callback(USERDB_RESULT_INTERNAL_FAILURE, request);
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164 (void)close(fd_in[0]);
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165 (void)close(fd_in[1]);
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166 (void)close(fd_out[0]);
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167 (void)close(fd_out[1]);
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168 return;
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169 }
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170
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171 if (pid == 0) {
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172 (void)close(fd_in[0]);
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173 (void)close(fd_out[1]);
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174 checkpassword_lookup_child(request, module,
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175 fd_in[1], fd_out[0]);
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176 /* not reached */
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177 }
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178
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179 if (close(fd_in[1]) < 0) {
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180 auth_request_log_error(request, "userdb-checkpassword",
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181 "close(fd_in[1]) failed: %m");
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182 }
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183 if (close(fd_out[0]) < 0) {
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184 auth_request_log_error(request, "userdb-checkpassword",
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185 "close(fd_out[0]) failed: %m");
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186 }
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187
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188 auth_request_ref(request);
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189 chkpw_auth_request = i_new(struct chkpw_auth_request, 1);
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190 chkpw_auth_request->fd_in = fd_in[0];
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191 chkpw_auth_request->fd_out = fd_out[1];
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192 chkpw_auth_request->pid = pid;
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193 chkpw_auth_request->request = request;
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194 chkpw_auth_request->callback = callback;
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195 chkpw_auth_request->half_finish_callback =
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196 checkpassword_request_half_finish;
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197 chkpw_auth_request->finish_callback =
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diff changeset
198 checkpassword_request_finish;
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199 chkpw_auth_request->internal_failure_code =
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200 USERDB_RESULT_INTERNAL_FAILURE;
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diff changeset
201
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202 chkpw_auth_request->io_in =
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diff changeset
203 io_add(fd_in[0], IO_READ, checkpassword_child_input,
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204 chkpw_auth_request);
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diff changeset
205 chkpw_auth_request->io_out =
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diff changeset
206 io_add(fd_out[1], IO_WRITE, checkpassword_child_output,
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diff changeset
207 chkpw_auth_request);
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208
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209 hash_table_insert(module->clients, POINTER_CAST(pid),
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diff changeset
210 chkpw_auth_request);
8307
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211
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diff changeset
212 if (checkpassword_userdb_children != NULL)
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diff changeset
213 child_wait_add_pid(checkpassword_userdb_children, pid);
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214 else {
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diff changeset
215 checkpassword_userdb_children =
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parents:
diff changeset
216 child_wait_new_with_pid(pid, sigchld_handler, module);
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217 }
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diff changeset
218 }
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219
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diff changeset
220 static struct userdb_module *
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parents:
diff changeset
221 checkpassword_preinit(struct auth_userdb *auth_userdb, const char *args)
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diff changeset
222 {
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diff changeset
223 struct checkpassword_userdb_module *module;
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diff changeset
224
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diff changeset
225 module = p_new(auth_userdb->auth->pool,
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diff changeset
226 struct checkpassword_userdb_module, 1);
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parents:
diff changeset
227 module->checkpassword_path = p_strdup(auth_userdb->auth->pool, args);
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parents:
diff changeset
228 module->checkpassword_reply_path =
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diff changeset
229 PKG_LIBEXECDIR"/checkpassword-reply";
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230
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diff changeset
231 module->clients =
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parents: 8314
diff changeset
232 hash_table_create(default_pool, default_pool, 0, NULL, NULL);
8307
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233
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diff changeset
234 return &module->module;
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diff changeset
235 }
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236
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diff changeset
237 static void checkpassword_deinit(struct userdb_module *_module)
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diff changeset
238 {
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diff changeset
239 struct checkpassword_userdb_module *module =
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diff changeset
240 (struct checkpassword_userdb_module *)_module;
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parents:
diff changeset
241 struct hash_iterate_context *iter;
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
242 void *key, *value;
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243
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diff changeset
244 iter = hash_table_iterate_init(module->clients);
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parents: 8314
diff changeset
245 while (hash_table_iterate(iter, &key, &value)) {
8307
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
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parents:
diff changeset
246 checkpassword_request_finish(value,
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
247 USERDB_RESULT_INTERNAL_FAILURE);
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
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diff changeset
248 }
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f9166a09423a Renamed hash_*() to hash_table_*() to avoid conflicts with OSX's strhash.h
Timo Sirainen <tss@iki.fi>
parents: 8314
diff changeset
249 hash_table_iterate_deinit(&iter);
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Timo Sirainen <tss@iki.fi>
parents: 8314
diff changeset
250 hash_table_destroy(&module->clients);
8307
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diff changeset
251
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parents:
diff changeset
252 if (checkpassword_userdb_children != NULL)
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parents:
diff changeset
253 child_wait_free(&checkpassword_userdb_children);
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parents:
diff changeset
254 }
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
255
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
256 struct userdb_module_interface userdb_checkpassword = {
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parents:
diff changeset
257 "checkpassword",
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
258
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parents:
diff changeset
259 checkpassword_preinit,
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
260 NULL,
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
261 checkpassword_deinit,
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
262
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
263 checkpassword_lookup,
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
264 };
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
265 #else
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
266 struct userdb_module_interface userdb_checkpassword = {
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
267 MEMBER(name) "checkpassword"
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
268 };
33eae1ca0be0 Added support for userdb checkpassword. Patch by Sascha Wilde.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
269 #endif