Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/auth/db-checkpassword.c @ 9266:cd29b745c8dd HEAD

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configure: clock_gettime()'s -lrt adding dropped everything else from $LIBS.
author Timo Sirainen <tss@iki.fi>
date Mon, 27 Jul 2009 06:32:42 -0400
parents b9faf4db2a9f
children 00cd9aacd03c
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rev   line source
8590
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
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5 #if defined(PASSDB_CHECKPASSWORD) || defined(USERDB_CHECKPASSWORD)
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6
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7 #include "db-checkpassword.h"
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8
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9 static void env_put_extra_fields(const char *extra_fields)
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10 {
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11 const char *const *tmp;
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12 const char *key, *p;
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13
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14 for (tmp = t_strsplit(extra_fields, "\t"); *tmp != NULL; tmp++) {
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15 key = t_str_ucase(t_strcut(*tmp, '='));
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16 p = strchr(*tmp, '=');
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17 if (p == NULL)
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18 env_put(t_strconcat(key, "=1", NULL));
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19 else
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20 env_put(t_strconcat(key, p, NULL));
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21 }
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22 }
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23
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24 static void checkpassword_request_close(struct chkpw_auth_request *request)
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25 {
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26 if (request->io_in != NULL)
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27 io_remove(&request->io_in);
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28 if (request->io_out != NULL)
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29 io_remove(&request->io_out);
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30
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31 if (request->fd_in != -1) {
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32 if (close(request->fd_in) < 0)
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33 i_error("checkpassword: close() failed: %m");
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34 request->fd_in = -1;
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35 }
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36 if (request->fd_out != -1) {
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37 if (close(request->fd_out) < 0)
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38 i_error("checkpassword: close() failed: %m");
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39 }
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40 }
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41
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42 void checkpassword_request_free(struct chkpw_auth_request *request)
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43 {
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44 checkpassword_request_close(request);
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45 if (request->input_buf != NULL)
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46 str_free(&request->input_buf);
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47
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48 if (request->password != NULL) {
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49 safe_memset(request->password, 0, strlen(request->password));
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50 i_free(request->password);
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51 }
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52 i_free(request);
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53 }
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54
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55 enum checkpassword_sigchld_handler_result
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56 checkpassword_sigchld_handler(const struct child_wait_status *child_wait_status,
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57 struct chkpw_auth_request *request)
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58 {
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59 int status = child_wait_status->status;
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60 pid_t pid = child_wait_status->pid;
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61
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62 if (request == NULL) {
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63 i_error("checkpassword: sighandler called for unknown child %s",
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64 dec2str(pid));
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65 return SIGCHLD_RESULT_UNKNOWN_CHILD;
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66 }
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67
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68 if (WIFSIGNALED(status)) {
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69 i_error("checkpassword: Child %s died with signal %d",
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70 dec2str(pid), WTERMSIG(status));
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71 return SIGCHLD_RESULT_DEAD_CHILD;
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72 } else if (WIFEXITED(status)) {
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73 request->exited = TRUE;
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74 request->exit_status = WEXITSTATUS(status);
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75
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76 auth_request_log_debug(request->request,
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77 "checkpassword", "exit_status=%d",
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78 request->exit_status);
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79 return SIGCHLD_RESULT_OK;
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80 } else {
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81 /* shouldn't happen */
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82 auth_request_log_debug(request->request, "checkpassword",
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83 "Child exited with status=%d", status);
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84 return SIGCHLD_RESULT_UNKNOWN_ERROR;
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85 }
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86 }
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87
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88 void checkpassword_setup_env(struct auth_request *request)
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89 {
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90 /* Besides passing the standard username and password in a
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91 pipe, also pass some other possibly interesting information
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92 via environment. Use UCSPI names for local/remote IPs. */
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93 env_put("PROTO=TCP"); /* UCSPI */
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94 env_put(t_strconcat("SERVICE=", request->service, NULL));
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95 if (request->local_ip.family != 0) {
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96 env_put(t_strconcat("TCPLOCALIP=",
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97 net_ip2addr(&request->local_ip), NULL));
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98 /* FIXME: for backwards compatibility only,
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99 remove some day */
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100 env_put(t_strconcat("LOCAL_IP=",
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101 net_ip2addr(&request->local_ip), NULL));
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102 }
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103 if (request->remote_ip.family != 0) {
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104 env_put(t_strconcat("TCPREMOTEIP=",
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105 net_ip2addr(&request->remote_ip), NULL));
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106 /* FIXME: for backwards compatibility only,
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107 remove some day */
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108 env_put(t_strconcat("REMOTE_IP=",
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109 net_ip2addr(&request->remote_ip), NULL));
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110 }
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111 if (request->local_port != 0) {
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112 env_put(t_strdup_printf("TCPLOCALPORT=%u",
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113 request->local_port));
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114 }
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115 if (request->remote_port != 0) {
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116 env_put(t_strdup_printf("TCPREMOTEPORT=%u",
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117 request->remote_port));
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118 }
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119 if (request->master_user != NULL) {
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120 env_put(t_strconcat("MASTER_USER=",
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121 request->master_user, NULL));
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122 }
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123 if (request->extra_fields != NULL) {
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124 const char *fields =
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125 auth_stream_reply_export(request->extra_fields);
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126
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127 /* extra fields could come from master db */
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128 env_put_extra_fields(fields);
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129 }
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130 }
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131
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132 void checkpassword_child_input(struct chkpw_auth_request *request)
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133 {
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134 unsigned char buf[1024];
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135 ssize_t ret;
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136
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137 ret = read(request->fd_in, buf, sizeof(buf));
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138 if (ret <= 0) {
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139 if (ret < 0) {
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140 auth_request_log_error(request->request,
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141 "checkpassword", "read() failed: %m");
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142 }
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143
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144 auth_request_log_debug(request->request, "checkpassword",
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145 "Received no input");
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146 checkpassword_request_close(request);
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147 request->half_finish_callback(request);
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148 } else {
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149 if (request->input_buf == NULL)
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150 request->input_buf = str_new(default_pool, 512);
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151 str_append_n(request->input_buf, buf, ret);
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152
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153 auth_request_log_debug(request->request, "checkpassword",
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154 "Received input: %s", str_c(request->input_buf));
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155 }
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156 }
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157
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158 void checkpassword_child_output(struct chkpw_auth_request *request)
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159 {
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160 /* Send: username \0 password \0 timestamp \0.
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161 Must be 512 bytes or less. The "timestamp" parameter is actually
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162 useful only for APOP authentication. We don't support it, so
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163 keep it empty */
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164 struct auth_request *auth_request = request->request;
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165 buffer_t *buf;
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166 const unsigned char *data;
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167 size_t size;
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168 ssize_t ret;
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169
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170 buf = buffer_create_dynamic(pool_datastack_create(), 512+1);
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171 buffer_append(buf, auth_request->user, strlen(auth_request->user)+1);
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172 if (request->password != NULL)
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173 buffer_append(buf, request->password, strlen(request->password)+1);
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174 else
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175 buffer_append_c(buf, '\0');
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176 buffer_append_c(buf, '\0');
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177 data = buffer_get_data(buf, &size);
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178
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179 if (size > 512) {
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180 auth_request_log_error(request->request, "checkpassword",
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181 "output larger than 512 bytes: %"PRIuSIZE_T, size);
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182 request->finish_callback(request,
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183 request->internal_failure_code);
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184 return;
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185 }
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186
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187 ret = write(request->fd_out, data + request->write_pos,
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188 size - request->write_pos);
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189 if (ret <= 0) {
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190 if (ret < 0) {
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191 auth_request_log_error(request->request,
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192 "checkpassword", "write() failed: %m");
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193 }
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194 request->finish_callback(request,
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195 request->internal_failure_code);
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196 return;
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197 }
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198
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199 request->write_pos += ret;
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200 if (request->write_pos < size)
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201 return;
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202
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203 io_remove(&request->io_out);
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204
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205 if (close(request->fd_out) < 0)
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206 i_error("checkpassword: close() failed: %m");
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207 request->fd_out = -1;
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208 }
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209
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210 #endif