Mercurial > dovecot > core-2.2
annotate src/lib-master/master-login-auth.c @ 17130:add8c00fb3cc
Updated copyright notices to include year 2014.
author | Timo Sirainen <tss@iki.fi> |
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date | Tue, 04 Feb 2014 16:23:22 -0500 |
parents | 9ef23179892a |
children | f6e2fa1afa45 |
rev | line source |
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1 /* Copyright (c) 2009-2014 Dovecot authors, see the included COPYING file */ |
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2 |
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3 #include "lib.h" |
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4 #include "net.h" |
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5 #include "ioloop.h" |
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6 #include "hostpid.h" |
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7 #include "istream.h" |
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8 #include "ostream.h" |
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9 #include "llist.h" |
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10 #include "hex-binary.h" |
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11 #include "hash.h" |
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12 #include "str.h" |
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13 #include "master-interface.h" |
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14 #include "master-service.h" |
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15 #include "master-auth.h" |
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16 #include "master-login-auth.h" |
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17 |
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18 #include <stdlib.h> |
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19 |
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20 #define AUTH_MAX_INBUF_SIZE 8192 |
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21 |
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22 struct master_login_auth_request { |
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23 struct master_login_auth_request *prev, *next; |
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24 |
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25 unsigned int id; |
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26 time_t create_stamp; |
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27 |
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28 pid_t auth_pid; |
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29 unsigned int auth_id; |
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30 unsigned int client_pid; |
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31 uint8_t cookie[MASTER_AUTH_COOKIE_SIZE]; |
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32 |
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33 master_login_auth_request_callback_t *callback; |
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34 void *context; |
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35 |
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36 unsigned int aborted:1; |
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37 }; |
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38 |
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39 struct master_login_auth { |
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40 pool_t pool; |
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41 const char *auth_socket_path; |
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42 int refcount; |
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43 |
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44 int fd; |
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45 struct io *io; |
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46 struct istream *input; |
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47 struct ostream *output; |
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48 struct timeout *to; |
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49 |
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50 unsigned int id_counter; |
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51 HASH_TABLE(void *, struct master_login_auth_request *) requests; |
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52 /* linked list of requests, ordered by create_stamp */ |
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53 struct master_login_auth_request *request_head, *request_tail; |
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54 |
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55 pid_t auth_server_pid; |
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57 unsigned int request_auth_token:1; |
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58 unsigned int version_received:1; |
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59 unsigned int spid_received:1; |
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60 }; |
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61 |
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62 static void master_login_auth_set_timeout(struct master_login_auth *auth); |
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63 static void master_login_auth_check_spids(struct master_login_auth *auth); |
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64 |
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65 struct master_login_auth * |
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66 master_login_auth_init(const char *auth_socket_path, bool request_auth_token) |
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67 { |
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68 struct master_login_auth *auth; |
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69 pool_t pool; |
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70 |
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71 pool = pool_alloconly_create("master login auth", 1024); |
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72 auth = p_new(pool, struct master_login_auth, 1); |
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73 auth->pool = pool; |
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74 auth->auth_socket_path = p_strdup(pool, auth_socket_path); |
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75 auth->request_auth_token = request_auth_token; |
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76 auth->refcount = 1; |
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77 auth->fd = -1; |
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78 hash_table_create_direct(&auth->requests, pool, 0); |
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79 auth->id_counter = (rand() % 32767) * 131072U; |
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80 return auth; |
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81 } |
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82 |
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83 static void |
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84 request_internal_failure(struct master_login_auth_request *request, |
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85 const char *reason) |
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86 { |
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87 i_error("%s (client-pid=%u client-id=%u)", |
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88 reason, request->client_pid, request->auth_id); |
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89 request->callback(NULL, MASTER_AUTH_ERRMSG_INTERNAL_FAILURE, |
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90 request->context); |
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91 } |
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92 |
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93 void master_login_auth_disconnect(struct master_login_auth *auth) |
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94 { |
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95 struct master_login_auth_request *request; |
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96 |
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97 while (auth->request_head != NULL) { |
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98 request = auth->request_head; |
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99 DLLIST2_REMOVE(&auth->request_head, |
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100 &auth->request_tail, request); |
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101 |
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102 request_internal_failure(request, |
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103 "Disconnected from auth server, aborting"); |
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104 i_free(request); |
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105 } |
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106 hash_table_clear(auth->requests, FALSE); |
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107 |
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108 if (auth->to != NULL) |
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109 timeout_remove(&auth->to); |
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110 if (auth->io != NULL) |
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111 io_remove(&auth->io); |
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112 if (auth->fd != -1) { |
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113 i_stream_destroy(&auth->input); |
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114 o_stream_destroy(&auth->output); |
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115 |
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116 net_disconnect(auth->fd); |
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117 auth->fd = -1; |
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118 } |
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119 auth->version_received = FALSE; |
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120 } |
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121 |
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122 static void master_login_auth_unref(struct master_login_auth **_auth) |
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123 { |
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124 struct master_login_auth *auth = *_auth; |
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125 |
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126 *_auth = NULL; |
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127 |
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128 i_assert(auth->refcount > 0); |
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129 if (--auth->refcount > 0) |
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130 return; |
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131 |
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132 hash_table_destroy(&auth->requests); |
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133 pool_unref(&auth->pool); |
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134 } |
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135 |
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136 void master_login_auth_deinit(struct master_login_auth **_auth) |
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137 { |
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138 struct master_login_auth *auth = *_auth; |
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139 |
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140 *_auth = NULL; |
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141 |
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142 master_login_auth_disconnect(auth); |
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143 master_login_auth_unref(&auth); |
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144 } |
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145 |
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146 static unsigned int auth_get_next_timeout_secs(struct master_login_auth *auth) |
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147 { |
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148 time_t expires; |
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149 |
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150 expires = auth->request_head->create_stamp + |
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151 MASTER_AUTH_LOOKUP_TIMEOUT_SECS; |
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152 return expires <= ioloop_time ? 0 : expires - ioloop_time; |
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153 } |
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154 |
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155 static void master_login_auth_timeout(struct master_login_auth *auth) |
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156 { |
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157 struct master_login_auth_request *request; |
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158 const char *reason; |
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159 |
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160 while (auth->request_head != NULL && |
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161 auth_get_next_timeout_secs(auth) == 0) { |
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162 request = auth->request_head; |
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163 DLLIST2_REMOVE(&auth->request_head, |
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164 &auth->request_tail, request); |
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165 hash_table_remove(auth->requests, POINTER_CAST(request->id)); |
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166 |
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167 reason = t_strdup_printf( |
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168 "Auth server request timed out after %u secs", |
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169 (unsigned int)(ioloop_time - request->create_stamp)); |
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170 request_internal_failure(request, reason); |
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171 i_free(request); |
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172 } |
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173 timeout_remove(&auth->to); |
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174 master_login_auth_set_timeout(auth); |
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175 } |
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176 |
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177 static void master_login_auth_set_timeout(struct master_login_auth *auth) |
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178 { |
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179 i_assert(auth->to == NULL); |
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180 |
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181 if (auth->request_head != NULL) { |
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182 auth->to = timeout_add(auth_get_next_timeout_secs(auth) * 1000, |
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183 master_login_auth_timeout, auth); |
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184 } |
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185 } |
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186 |
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187 static void |
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188 master_login_auth_request_remove(struct master_login_auth *auth, |
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189 struct master_login_auth_request *request) |
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190 { |
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191 bool update_timeout; |
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192 |
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193 update_timeout = request->prev == NULL; |
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194 |
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195 hash_table_remove(auth->requests, POINTER_CAST(request->id)); |
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196 DLLIST2_REMOVE(&auth->request_head, &auth->request_tail, request); |
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197 |
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198 if (update_timeout) { |
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199 timeout_remove(&auth->to); |
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200 master_login_auth_set_timeout(auth); |
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201 } |
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202 } |
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203 |
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204 static struct master_login_auth_request * |
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205 master_login_auth_lookup_request(struct master_login_auth *auth, |
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206 unsigned int id) |
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207 { |
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208 struct master_login_auth_request *request; |
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209 |
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210 request = hash_table_lookup(auth->requests, POINTER_CAST(id)); |
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211 if (request == NULL) { |
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212 i_error("Auth server sent reply with unknown ID %u", id); |
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213 return NULL; |
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214 } |
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215 master_login_auth_request_remove(auth, request); |
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216 if (request->aborted) { |
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217 request->callback(NULL, MASTER_AUTH_ERRMSG_INTERNAL_FAILURE, |
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218 request->context); |
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219 i_free(request); |
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220 return NULL; |
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221 } |
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222 return request; |
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223 } |
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224 |
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225 static bool |
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226 master_login_auth_input_user(struct master_login_auth *auth, const char *args) |
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227 { |
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228 struct master_login_auth_request *request; |
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229 const char *const *list; |
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230 unsigned int id; |
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231 |
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232 /* <id> <userid> [..] */ |
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233 |
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234 list = t_strsplit_tab(args); |
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235 if (list[0] == NULL || list[1] == NULL || |
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236 str_to_uint(list[0], &id) < 0) { |
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237 i_error("Auth server sent corrupted USER line"); |
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238 return FALSE; |
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239 } |
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240 |
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241 request = master_login_auth_lookup_request(auth, id); |
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242 if (request != NULL) { |
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243 request->callback(list + 1, NULL, request->context); |
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244 i_free(request); |
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245 } |
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246 return TRUE; |
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247 } |
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248 |
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249 static bool |
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250 master_login_auth_input_notfound(struct master_login_auth *auth, |
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251 const char *args) |
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252 { |
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253 struct master_login_auth_request *request; |
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254 unsigned int id; |
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255 |
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256 if (str_to_uint(args, &id) < 0) { |
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257 i_error("Auth server sent corrupted NOTFOUND line"); |
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258 return FALSE; |
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259 } |
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260 |
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261 request = master_login_auth_lookup_request(auth, id); |
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262 if (request != NULL) { |
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263 const char *reason = t_strdup_printf( |
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264 "Authenticated user not found from userdb, " |
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265 "auth lookup id=%u", id); |
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266 request_internal_failure(request, reason); |
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267 i_free(request); |
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268 } |
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269 return TRUE; |
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270 } |
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271 |
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272 static bool |
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273 master_login_auth_input_fail(struct master_login_auth *auth, |
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274 const char *args_line) |
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275 { |
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276 struct master_login_auth_request *request; |
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277 const char *const *args, *error = NULL; |
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278 unsigned int i, id; |
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279 |
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280 args = t_strsplit_tab(args_line); |
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281 if (args[0] == NULL || str_to_uint(args[0], &id) < 0) { |
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282 i_error("Auth server sent broken FAIL line"); |
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283 return FALSE; |
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284 } |
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285 for (i = 1; args[i] != NULL; i++) { |
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286 if (strncmp(args[i], "reason=", 7) == 0) |
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287 error = args[i] + 7; |
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288 } |
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289 |
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290 request = master_login_auth_lookup_request(auth, id); |
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291 if (request != NULL) { |
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292 if (error == NULL) { |
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293 request_internal_failure(request, |
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294 "Internal auth failure"); |
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295 } else { |
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296 i_error("Internal auth failure: %s " |
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297 "(client-pid=%u client-id=%u)", |
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298 error, request->client_pid, request->auth_id); |
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299 request->callback(NULL, error, request->context); |
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300 } |
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301 i_free(request); |
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302 } |
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303 return TRUE; |
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304 } |
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305 |
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306 static void master_login_auth_input(struct master_login_auth *auth) |
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307 { |
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308 const char *line; |
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309 bool ret; |
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310 |
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311 switch (i_stream_read(auth->input)) { |
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312 case 0: |
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313 return; |
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314 case -1: |
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315 /* disconnected. stop accepting new connections, because in |
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316 default configuration we no longer have permissions to |
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317 connect back to auth-master */ |
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318 master_service_stop_new_connections(master_service); |
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319 master_login_auth_disconnect(auth); |
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320 return; |
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321 case -2: |
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322 /* buffer full */ |
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323 i_error("Auth server sent us too long line"); |
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324 master_login_auth_disconnect(auth); |
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325 return; |
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326 } |
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327 |
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328 if (!auth->version_received) { |
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329 line = i_stream_next_line(auth->input); |
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330 if (line == NULL) |
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331 return; |
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332 |
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333 /* make sure the major version matches */ |
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334 if (strncmp(line, "VERSION\t", 8) != 0 || |
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335 !str_uint_equals(t_strcut(line + 8, '\t'), |
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336 AUTH_MASTER_PROTOCOL_MAJOR_VERSION)) { |
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337 i_error("Authentication server not compatible with " |
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338 "master process (mixed old and new binaries?)"); |
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339 master_login_auth_disconnect(auth); |
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340 return; |
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341 } |
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342 auth->version_received = TRUE; |
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343 } |
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344 if (!auth->spid_received) { |
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345 line = i_stream_next_line(auth->input); |
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346 if (line == NULL) |
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347 return; |
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348 |
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349 if (strncmp(line, "SPID\t", 5) != 0 || |
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350 str_to_pid(line + 5, &auth->auth_server_pid) < 0) { |
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351 i_error("Authentication server didn't " |
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352 "send valid SPID as expected: %s", line); |
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353 master_login_auth_disconnect(auth); |
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354 return; |
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355 } |
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356 auth->spid_received = TRUE; |
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357 master_login_auth_check_spids(auth); |
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358 } |
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359 |
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360 auth->refcount++; |
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361 while ((line = i_stream_next_line(auth->input)) != NULL) { |
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362 if (strncmp(line, "USER\t", 5) == 0) |
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363 ret = master_login_auth_input_user(auth, line + 5); |
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364 else if (strncmp(line, "NOTFOUND\t", 9) == 0) |
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365 ret = master_login_auth_input_notfound(auth, line + 9); |
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366 else if (strncmp(line, "FAIL\t", 5) == 0) |
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367 ret = master_login_auth_input_fail(auth, line + 5); |
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368 else |
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369 ret = TRUE; |
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370 |
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371 if (!ret || auth->input == NULL) { |
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372 master_login_auth_disconnect(auth); |
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373 break; |
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374 } |
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375 } |
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376 master_login_auth_unref(&auth); |
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377 } |
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378 |
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379 static int |
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380 master_login_auth_connect(struct master_login_auth *auth) |
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381 { |
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382 int fd; |
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383 |
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384 i_assert(auth->fd == -1); |
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385 |
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386 fd = net_connect_unix_with_retries(auth->auth_socket_path, 1000); |
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387 if (fd == -1) { |
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388 i_error("net_connect_unix(%s) failed: %m", |
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389 auth->auth_socket_path); |
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390 return -1; |
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391 } |
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392 auth->fd = fd; |
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393 auth->input = i_stream_create_fd(fd, AUTH_MAX_INBUF_SIZE, FALSE); |
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394 auth->output = o_stream_create_fd(fd, (size_t)-1, FALSE); |
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395 o_stream_set_no_error_handling(auth->output, TRUE); |
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396 auth->io = io_add(fd, IO_READ, master_login_auth_input, auth); |
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397 return 0; |
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398 } |
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399 |
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400 static bool |
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401 auth_request_check_spid(struct master_login_auth *auth, |
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402 struct master_login_auth_request *req) |
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403 { |
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404 if (auth->auth_server_pid != req->auth_pid && auth->spid_received) { |
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405 /* auth server was restarted. don't even attempt a login. */ |
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406 i_warning("Auth server restarted (pid %u -> %u), aborting auth", |
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407 (unsigned int)req->auth_pid, |
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408 (unsigned int)auth->auth_server_pid); |
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409 return FALSE; |
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410 } |
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411 return TRUE; |
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412 } |
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413 |
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414 static void master_login_auth_check_spids(struct master_login_auth *auth) |
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415 { |
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416 struct master_login_auth_request *req, *next; |
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417 |
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418 for (req = auth->request_head; req != NULL; req = next) { |
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419 next = req->next; |
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420 if (!auth_request_check_spid(auth, req)) |
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421 req->aborted = TRUE; |
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422 } |
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423 } |
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424 |
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425 static void |
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426 master_login_auth_send_request(struct master_login_auth *auth, |
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427 struct master_login_auth_request *req) |
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428 { |
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429 string_t *str; |
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430 |
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431 if (!auth_request_check_spid(auth, req)) { |
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432 master_login_auth_request_remove(auth, req); |
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433 req->callback(NULL, MASTER_AUTH_ERRMSG_INTERNAL_FAILURE, |
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434 req->context); |
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435 i_free(req); |
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436 return; |
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437 } |
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438 |
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439 str = t_str_new(128); |
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440 str_printfa(str, "REQUEST\t%u\t%u\t%u\t", req->id, |
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441 req->client_pid, req->auth_id); |
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442 binary_to_hex_append(str, req->cookie, sizeof(req->cookie)); |
16909
9ef23179892a
auth: Added %{session_pid} variable for userdb lookups in login requests.
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diff
changeset
|
443 str_printfa(str, "\tsession_pid=%s", my_pid); |
15049
aa6027a0a78e
Added support to perform token-based service process authentication.
Stephan Bosch <stephan@rename-it.nl>
parents:
14923
diff
changeset
|
444 if (auth->request_auth_token) |
16909
9ef23179892a
auth: Added %{session_pid} variable for userdb lookups in login requests.
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|
445 str_append(str, "\trequest_auth_token"); |
12137
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|
446 str_append_c(str, '\n'); |
14681
ca37d1577291
Added o_stream_nsend*() and related functions to make delayed error handling safer.
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|
447 o_stream_nsend(auth->output, str_data(str), str_len(str)); |
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448 } |
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449 |
10101
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|
450 void master_login_auth_request(struct master_login_auth *auth, |
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451 const struct master_auth_request *req, |
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452 master_login_auth_request_callback_t *callback, |
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|
453 void *context) |
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|
454 { |
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|
455 struct master_login_auth_request *login_req; |
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|
456 unsigned int id; |
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|
457 |
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458 if (auth->fd == -1) { |
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|
459 if (master_login_auth_connect(auth) < 0) { |
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lib-master: Stop accepting new connections after auth-master gets disconnected.
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|
460 /* we couldn't connect to auth now, |
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|
461 so we probably can't in future either. */ |
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|
462 master_service_stop_new_connections(master_service); |
11018
2e08ce368bc0
Added support for userdb lookup to fail with a reason (many API changes).
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|
463 callback(NULL, MASTER_AUTH_ERRMSG_INTERNAL_FAILURE, |
2e08ce368bc0
Added support for userdb lookup to fail with a reason (many API changes).
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10589
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464 context); |
10101
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
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parents:
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465 return; |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
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parents:
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466 } |
14681
ca37d1577291
Added o_stream_nsend*() and related functions to make delayed error handling safer.
Timo Sirainen <tss@iki.fi>
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14471
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467 o_stream_nsend_str(auth->output, |
12137
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
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parents:
11256
diff
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468 t_strdup_printf("VERSION\t%u\t%u\n", |
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
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parents:
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469 AUTH_MASTER_PROTOCOL_MAJOR_VERSION, |
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
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parents:
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470 AUTH_MASTER_PROTOCOL_MINOR_VERSION)); |
10101
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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471 } |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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472 |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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473 id = ++auth->id_counter; |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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474 if (id == 0) |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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475 id++; |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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476 |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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477 login_req = i_new(struct master_login_auth_request, 1); |
11097
0979e9e1e124
lib-master: Added timeout for auth master lookups.
Timo Sirainen <tss@iki.fi>
parents:
11086
diff
changeset
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478 login_req->create_stamp = ioloop_time; |
11248
1fd45deee948
lib-master: Don't crash after timeouting an auth-master request.
Timo Sirainen <tss@iki.fi>
parents:
11097
diff
changeset
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479 login_req->id = id; |
12137
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
Timo Sirainen <tss@iki.fi>
parents:
11256
diff
changeset
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480 login_req->auth_pid = req->auth_pid; |
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
Timo Sirainen <tss@iki.fi>
parents:
11256
diff
changeset
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481 login_req->client_pid = req->client_pid; |
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
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parents:
11256
diff
changeset
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482 login_req->auth_id = req->auth_id; |
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
Timo Sirainen <tss@iki.fi>
parents:
11256
diff
changeset
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483 memcpy(login_req->cookie, req->cookie, sizeof(login_req->cookie)); |
10101
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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484 login_req->callback = callback; |
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
changeset
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485 login_req->context = context; |
14923
96fd2c3bf932
Reverted "support for non-pointers" part of the hash table API changes.
Timo Sirainen <tss@iki.fi>
parents:
14918
diff
changeset
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486 hash_table_insert(auth->requests, POINTER_CAST(id), login_req); |
11097
0979e9e1e124
lib-master: Added timeout for auth master lookups.
Timo Sirainen <tss@iki.fi>
parents:
11086
diff
changeset
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487 DLLIST2_APPEND(&auth->request_head, &auth->request_tail, login_req); |
0979e9e1e124
lib-master: Added timeout for auth master lookups.
Timo Sirainen <tss@iki.fi>
parents:
11086
diff
changeset
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488 |
0979e9e1e124
lib-master: Added timeout for auth master lookups.
Timo Sirainen <tss@iki.fi>
parents:
11086
diff
changeset
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489 if (auth->to == NULL) |
0979e9e1e124
lib-master: Added timeout for auth master lookups.
Timo Sirainen <tss@iki.fi>
parents:
11086
diff
changeset
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490 master_login_auth_set_timeout(auth); |
12137
16330c0c8ef4
lib-master: When finishing auth, don't send REQUEST if auth process has restarted.
Timo Sirainen <tss@iki.fi>
parents:
11256
diff
changeset
|
491 |
12405
e72ab743b8df
lib-master: Don't wait for handshake before sending auth-master request.
Timo Sirainen <tss@iki.fi>
parents:
12367
diff
changeset
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492 master_login_auth_send_request(auth, login_req); |
10101
4fe8c4382712
Redesigned how login process passes connections to mail processes and changed related APIs.
Timo Sirainen <tss@iki.fi>
parents:
diff
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493 } |
10199
9d13e9f78d52
lib-master: Fixes to handling master-login services.
Timo Sirainen <tss@iki.fi>
parents:
10159
diff
changeset
|
494 |
9d13e9f78d52
lib-master: Fixes to handling master-login services.
Timo Sirainen <tss@iki.fi>
parents:
10159
diff
changeset
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495 unsigned int master_login_auth_request_count(struct master_login_auth *auth) |
9d13e9f78d52
lib-master: Fixes to handling master-login services.
Timo Sirainen <tss@iki.fi>
parents:
10159
diff
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496 { |
9d13e9f78d52
lib-master: Fixes to handling master-login services.
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parents:
10159
diff
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497 return hash_table_count(auth->requests); |
9d13e9f78d52
lib-master: Fixes to handling master-login services.
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parents:
10159
diff
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498 } |