Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/auth/userdb-nss.c @ 8999:afc1b0ef120d HEAD

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When :MAILBOXDIR= was empty, we might have appended extra '/' to it, which caused problems.
author Timo Sirainen <tss@iki.fi>
date Thu, 30 Apr 2009 20:00:09 -0400
parents 91e880ae387a
children 00cd9aacd03c
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rev   line source
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b9faf4db2a9f Updated copyright notices to include year 2009.
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1 /* Copyright (c) 2007-2009 Dovecot authors, see the included COPYING file */
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2
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3 /* Currently supports only GLIBC-compatible NSS modules */
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4
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5 #include "common.h"
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6 #include "userdb.h"
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7
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8 #ifdef USERDB_NSS
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9
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10 #include "module-dir.h"
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11
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12 #include <pwd.h>
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13 #include <unistd.h>
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14 #include <dlfcn.h>
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15 #include <nss.h>
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16
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17 #define USER_CACHE_KEY "%u"
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18
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19 struct nss_userdb_module {
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20 struct userdb_module module;
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21
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22 char *buf;
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23 size_t bufsize;
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24
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25 struct module nss_module;
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26 enum nss_status (*getpwnam_r)(const char *name, struct passwd *pwd,
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27 char *buffer, size_t buflen, int *errnop);
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28 };
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29
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30 static void
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31 userdb_nss_lookup(struct auth_request *auth_request,
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32 userdb_callback_t *callback)
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33 {
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34 struct userdb_module *_module = auth_request->userdb->userdb;
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35 struct nss_userdb_module *module = (struct nss_userdb_module *)_module;
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36 struct passwd pw;
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37 enum nss_status status;
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38 enum userdb_result result = USERDB_RESULT_INTERNAL_FAILURE;
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39 int err;
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40
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41 auth_request_log_debug(auth_request, "nss", "lookup");
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42
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43 status = module->getpwnam_r(auth_request->user, &pw,
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44 module->buf, module->bufsize, &err);
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45 switch (status) {
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46 case NSS_STATUS_TRYAGAIN:
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47 auth_request_log_error(auth_request, "nss",
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48 "returned tryagain (err=%d)", err);
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49 break;
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50 case NSS_STATUS_UNAVAIL:
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51 auth_request_log_error(auth_request, "nss",
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52 "unavailable (err=%d)", err);
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53 break;
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54 case NSS_STATUS_NOTFOUND:
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55 auth_request_log_info(auth_request, "nss", "unknown user");
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56 result = USERDB_RESULT_USER_UNKNOWN;
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57 break;
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58 case NSS_STATUS_SUCCESS:
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59 result = USERDB_RESULT_OK;
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60 break;
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61 default:
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62 auth_request_log_info(auth_request, "nss",
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63 "returned %d (err=%d)", status, err);
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64 break;
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65 }
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66
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67 if (result != USERDB_RESULT_OK) {
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68 callback(result, auth_request);
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69 return;
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70 }
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71
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72 auth_request_set_field(auth_request, "user", pw.pw_name, NULL);
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73
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74 auth_request_init_userdb_reply(auth_request);
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75 auth_request_set_userdb_field(auth_request, "system_groups_user",
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76 pw.pw_name);
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77 auth_request_set_userdb_field(auth_request, "uid", dec2str(pw.pw_uid));
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78 auth_request_set_userdb_field(auth_request, "gid", dec2str(pw.pw_gid));
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79 auth_request_set_userdb_field(auth_request, "home", pw.pw_dir);
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80
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81 callback(USERDB_RESULT_OK, auth_request);
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82 }
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83
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84 static void
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85 userdb_nss_load_module(struct nss_userdb_module *module, pool_t pool)
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86 {
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87 const char *name = module->nss_module.name;
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88 char *path;
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89
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90 path = p_strdup_printf(pool, "/usr/lib/libnss_%s.so", name);
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91 module->nss_module.handle = dlopen(path, RTLD_GLOBAL | RTLD_NOW);
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92 if (module->nss_module.handle == NULL)
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93 i_fatal("dlopen(%s) failed: %s", path, dlerror());
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94 module->nss_module.path = path;
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95
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96 module->getpwnam_r =
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97 module_get_symbol(&module->nss_module,
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98 t_strdup_printf("_nss_%s_getpwnam_r", name));
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99 if (module->getpwnam_r == NULL)
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100 i_fatal("userdb nss: Module %s missing getpwnam_r()", path);
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101 }
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102
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103 static struct userdb_module *
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104 userdb_nss_preinit(struct auth_userdb *auth_userdb, const char *args)
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105 {
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106 struct nss_userdb_module *module;
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107 const char *const *tmp;
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108 pool_t pool = auth_userdb->auth->pool;
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109
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110 module = p_new(pool, struct nss_userdb_module, 1);
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111 module->bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
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112 module->buf = p_malloc(pool, module->bufsize);
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113
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114 for (tmp = t_strsplit(args, " "); *tmp != NULL; tmp++) {
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115 if (strcmp(*tmp, "blocking=yes") == 0)
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116 module->module.blocking = TRUE;
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117 else if (strncmp(*tmp, "service=", 8) == 0)
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118 module->nss_module.name = p_strdup(pool, *tmp + 8);
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119 else
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120 i_fatal("userdb nss: Unknown setting: %s", *tmp);
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121 }
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122
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123 if (module->nss_module.name == NULL)
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124 i_fatal("userdb nss: Missing service");
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125 userdb_nss_load_module(module, pool);
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126
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127 module->module.cache_key = USER_CACHE_KEY;
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128 return &module->module;
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129 }
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130
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131 static void userdb_nss_deinit(struct userdb_module *_module)
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132 {
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133 struct nss_userdb_module *module = (struct nss_userdb_module *)_module;
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134 void (*mod_endpwent)(void);
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135 const char *symbol;
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136
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137 symbol = t_strdup_printf("_nss_%s_endpwent", module->nss_module.name);
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138 mod_endpwent = module_get_symbol(&module->nss_module, symbol);
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139 if (mod_endpwent != NULL)
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140 mod_endpwent();
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141 }
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142
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143 struct userdb_module_interface userdb_nss = {
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144 "nss",
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145
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146 userdb_nss_preinit,
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147 NULL,
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148 userdb_nss_deinit,
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149
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150 userdb_nss_lookup
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151 };
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152 #else
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153 struct userdb_module_interface userdb_nss = {
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154 MEMBER(name) "nss"
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155 };
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156 #endif