Mercurial > dovecot > core-2.2
annotate src/plugins/acl/acl-lookup-dict.c @ 8433:dfe39e9a9e78 HEAD
Initial support for LISTing users with shared mailboxes.
author | Timo Sirainen <tss@iki.fi> |
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date | Sun, 16 Nov 2008 19:20:28 +0200 |
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children | 6d5ca089bd1e |
rev | line source |
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8433
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1 /* Copyright (c) 2008 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 "array.h" |
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5 #include "str.h" |
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6 #include "dict.h" |
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7 #include "mail-user.h" |
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8 #include "mail-namespace.h" |
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9 #include "acl-api-private.h" |
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10 #include "acl-storage.h" |
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11 #include "acl-plugin.h" |
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12 #include "acl-lookup-dict.h" |
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13 |
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14 #include <stdlib.h> |
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15 |
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16 #define DICT_SHARED_BOXES_PATH "shared-boxes/" |
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17 |
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18 struct acl_lookup_dict { |
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19 struct mail_user *user; |
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20 }; |
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21 |
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22 struct acl_lookup_dict_iter { |
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23 pool_t pool; |
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24 struct acl_lookup_dict *dict; |
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25 |
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26 ARRAY_TYPE(const_string) iter_ids; |
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27 struct dict_iterate_context *dict_iter; |
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28 unsigned int iter_idx; |
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29 |
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30 const char *prefix; |
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31 unsigned int prefix_len; |
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32 |
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33 unsigned int failed:1; |
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34 }; |
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35 |
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36 static struct dict *acl_dict; |
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37 |
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38 void acl_lookup_dicts_init(void) |
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39 { |
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40 const char *uri; |
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41 |
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42 uri = getenv("ACL_SHARED_DICT"); |
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43 if (uri == NULL) { |
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44 if (getenv("DEBUG") != NULL) { |
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45 i_info("acl: No acl_shared_dict setting - " |
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46 "shared mailbox listing is disabled"); |
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47 } |
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48 return; |
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49 } |
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50 |
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51 acl_dict = dict_init(uri, DICT_DATA_TYPE_STRING, ""); |
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52 if (acl_dict == NULL) |
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53 i_fatal("acl: dict_init(%s) failed", uri); |
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54 } |
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55 |
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56 void acl_lookup_dicts_deinit(void) |
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57 { |
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58 if (acl_dict != NULL) |
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59 dict_deinit(&acl_dict); |
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60 } |
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61 |
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62 struct acl_lookup_dict *acl_lookup_dict_init(struct mail_user *user) |
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63 { |
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64 struct acl_lookup_dict *dict; |
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65 |
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66 dict = i_new(struct acl_lookup_dict, 1); |
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67 dict->user = user; |
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68 return dict; |
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69 } |
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70 |
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71 void acl_lookup_dict_deinit(struct acl_lookup_dict **_dict) |
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72 { |
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73 struct acl_lookup_dict *dict = *_dict; |
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74 |
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75 *_dict = NULL; |
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76 i_free(dict); |
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77 } |
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78 |
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79 static void |
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80 acl_lookup_dict_write_rights_id(string_t *dest, const struct acl_rights *right) |
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81 { |
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82 switch (right->id_type) { |
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83 case ACL_ID_ANYONE: |
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84 case ACL_ID_AUTHENTICATED: |
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85 /* don't bother separating these */ |
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86 str_append(dest, "anyone"); |
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87 break; |
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88 case ACL_ID_USER: |
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89 str_append(dest, "user/"); |
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90 str_append(dest, right->identifier); |
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91 break; |
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92 case ACL_ID_GROUP: |
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93 case ACL_ID_GROUP_OVERRIDE: |
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94 str_append(dest, "group/"); |
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95 str_append(dest, right->identifier); |
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96 break; |
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97 case ACL_ID_OWNER: |
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98 case ACL_ID_TYPE_COUNT: |
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99 i_unreached(); |
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100 } |
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101 } |
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102 |
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103 static int acl_lookup_dict_rebuild_add_backend(struct mail_namespace *ns, |
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104 ARRAY_TYPE(const_string) *ids) |
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105 { |
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106 struct acl_backend *backend; |
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107 struct acl_mailbox_list_context *ctx; |
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108 struct acl_object *aclobj; |
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109 struct acl_object_list_iter *iter; |
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110 struct acl_rights rights; |
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111 const char *name, *id_dup; |
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112 string_t *id; |
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113 int ret, ret2 = 0; |
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114 |
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115 id = t_str_new(128); |
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116 backend = acl_storage_get_backend(ns->storage); |
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117 ctx = acl_backend_nonowner_lookups_iter_init(backend); |
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118 while ((ret = acl_backend_nonowner_lookups_iter_next(ctx, &name)) > 0) { |
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119 aclobj = acl_object_init_from_name(backend, ns->storage, name); |
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120 |
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121 iter = acl_object_list_init(aclobj); |
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122 while ((ret = acl_object_list_next(iter, &rights)) > 0) { |
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123 if (acl_rights_has_nonowner_lookup_changes(&rights)) { |
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124 str_truncate(id, 0); |
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125 acl_lookup_dict_write_rights_id(id, &rights); |
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126 id_dup = t_strdup(str_c(id)); |
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127 array_append(ids, &id_dup, 1); |
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128 } |
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129 } |
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130 acl_object_list_deinit(&iter); |
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131 if (ret < 0) |
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132 ret2 = -1; |
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133 acl_object_deinit(&aclobj); |
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134 } |
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135 acl_backend_nonowner_lookups_iter_deinit(&ctx); |
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136 return ret < 0 || ret2 < 0 ? -1 : 0; |
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137 } |
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138 |
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139 static int |
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140 acl_lookup_dict_rebuild_update(struct acl_lookup_dict *dict, |
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141 const ARRAY_TYPE(const_string) *new_ids_arr, |
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142 bool no_removes) |
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143 { |
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144 const char *username = dict->user->username; |
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145 struct dict_iterate_context *iter; |
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146 struct dict_transaction_context *dt; |
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147 const char *prefix, *key, *value, **old_ids, *const *new_ids, *p; |
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148 ARRAY_TYPE(const_string) old_ids_arr; |
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149 unsigned int newi, oldi, old_count, new_count; |
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150 string_t *path; |
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151 unsigned int prefix_len; |
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152 int ret; |
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153 |
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154 /* get all existing identifiers for the user */ |
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155 t_array_init(&old_ids_arr, 128); |
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156 prefix = DICT_PATH_SHARED DICT_SHARED_BOXES_PATH; |
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157 prefix_len = strlen(prefix); |
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158 iter = dict_iterate_init(acl_dict, prefix, DICT_ITERATE_FLAG_RECURSE); |
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159 while ((ret = dict_iterate(iter, &key, &value)) > 0) { |
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160 /* prefix/$dest/$source */ |
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161 key += prefix_len; |
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162 p = strchr(key, '/'); |
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163 if (p != NULL && strcmp(p + 1, username) == 0) { |
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164 key = t_strdup_until(key, p); |
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165 array_append(&old_ids_arr, &key, 1); |
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166 } |
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167 } |
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168 dict_iterate_deinit(&iter); |
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169 if (ret < 0) { |
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170 i_error("acl: dict iteration failed, can't update dict"); |
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171 return -1; |
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172 } |
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173 |
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174 /* sort the existing identifiers */ |
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175 old_ids = array_get_modifiable(&old_ids_arr, &old_count); |
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176 qsort(old_ids, old_count, sizeof(*old_ids), i_strcmp_p); |
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177 |
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178 /* sync the identifiers */ |
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179 path = t_str_new(256); |
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180 str_append(path, prefix); |
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181 |
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182 dt = dict_transaction_begin(acl_dict); |
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183 new_ids = array_get(new_ids_arr, &new_count); |
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184 for (newi = oldi = 0; newi < new_count || oldi < old_count; ) { |
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185 ret = newi == new_count ? 1 : |
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186 oldi == old_count ? -1 : |
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187 strcmp(new_ids[newi], old_ids[oldi]); |
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188 if (ret == 0) { |
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189 newi++; oldi++; |
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190 } else if (ret < 0) { |
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191 /* new identifier, add it */ |
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192 str_truncate(path, prefix_len); |
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193 str_append(path, new_ids[newi]); |
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194 str_append_c(path, '/'); |
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195 str_append(path, username); |
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196 dict_set(dt, str_c(path), "1"); |
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197 newi++; |
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198 } else if (!no_removes) { |
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199 /* old identifier removed */ |
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200 str_truncate(path, prefix_len); |
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201 str_append(path, old_ids[oldi]); |
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202 str_append_c(path, '/'); |
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203 str_append(path, username); |
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204 dict_unset(dt, str_c(path)); |
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205 oldi++; |
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206 } |
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207 } |
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208 if (dict_transaction_commit(&dt) < 0) { |
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209 i_error("acl: dict commit failed"); |
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210 return -1; |
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211 } |
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212 return 0; |
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213 } |
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214 |
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215 int acl_lookup_dict_rebuild(struct acl_lookup_dict *dict) |
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216 { |
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217 struct mail_namespace *ns; |
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218 ARRAY_TYPE(const_string) ids_arr; |
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219 const char **ids; |
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220 unsigned int i, dest, count; |
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221 int ret = 0; |
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222 |
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223 /* get all ACL identifiers with a positive lookup right */ |
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224 t_array_init(&ids_arr, 128); |
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225 for (ns = dict->user->namespaces; ns != NULL; ns = ns->next) { |
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226 if (acl_lookup_dict_rebuild_add_backend(ns, &ids_arr) < 0) |
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227 ret = -1; |
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228 } |
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229 |
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230 /* sort identifiers and remove duplicates */ |
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231 ids = array_get_modifiable(&ids_arr, &count); |
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232 qsort(ids, count, sizeof(*ids), i_strcmp_p); |
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233 |
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234 for (i = 1, dest = 0; i < count; i++) { |
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235 if (strcmp(ids[dest], ids[i]) != 0) { |
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236 if (++dest != i) |
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237 ids[dest] = ids[i]; |
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238 } |
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239 } |
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240 if (++dest < count) |
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241 array_delete(&ids_arr, dest, count-dest); |
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242 |
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243 /* if lookup failed at some point we can still add new ids, |
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244 but we can't remove any existing ones */ |
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245 if (acl_lookup_dict_rebuild_update(dict, &ids_arr, ret < 0) < 0) |
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246 ret = -1; |
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247 return ret; |
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248 } |
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249 |
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250 static void acl_lookup_dict_iterate_start(struct acl_lookup_dict_iter *iter) |
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251 { |
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252 const char *const *idp; |
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253 |
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254 idp = array_idx(&iter->iter_ids, iter->iter_idx); |
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255 iter->iter_idx++; |
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256 iter->prefix = p_strconcat(iter->pool, DICT_PATH_SHARED |
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257 DICT_SHARED_BOXES_PATH, *idp, "/", NULL); |
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258 iter->prefix_len = strlen(iter->prefix); |
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259 |
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260 iter->dict_iter = dict_iterate_init(acl_dict, iter->prefix, |
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261 DICT_ITERATE_FLAG_RECURSE); |
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262 } |
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263 |
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264 struct acl_lookup_dict_iter * |
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265 acl_lookup_dict_iterate_visible_init(struct acl_lookup_dict *dict) |
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266 { |
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267 struct acl_user *auser = ACL_USER_CONTEXT(dict->user); |
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268 struct acl_lookup_dict_iter *iter; |
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269 const char *id; |
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270 unsigned int i; |
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271 pool_t pool; |
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272 |
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273 pool = pool_alloconly_create("acl lookup dict iter", 512); |
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274 iter = p_new(pool, struct acl_lookup_dict_iter, 1); |
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275 iter->pool = pool; |
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276 iter->dict = dict; |
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277 |
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278 p_array_init(&iter->iter_ids, pool, 16); |
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279 id = "anyone"; |
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280 array_append(&iter->iter_ids, &id, 1); |
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281 id = p_strconcat(pool, "user/", dict->user->username, NULL); |
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282 array_append(&iter->iter_ids, &id, 1); |
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283 |
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284 /* get all groups we belong to */ |
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285 if (auser->groups != NULL) { |
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286 for (i = 0; auser->groups[i] != NULL; i++) { |
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287 id = p_strconcat(pool, "group/", auser->groups[i], |
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288 NULL); |
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289 array_append(&iter->iter_ids, &id, 1); |
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290 } |
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291 } |
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292 |
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293 /* iterate through all identifiers that match us, start with the |
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294 first one */ |
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295 acl_lookup_dict_iterate_start(iter); |
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296 return iter; |
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297 } |
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298 |
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299 const char * |
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300 acl_lookup_dict_iterate_visible_next(struct acl_lookup_dict_iter *iter) |
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301 { |
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302 const char *key, *value; |
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303 int ret; |
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304 |
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305 ret = dict_iterate(iter->dict_iter, &key, &value); |
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306 if (ret > 0) { |
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307 i_assert(iter->prefix_len < strlen(key)); |
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308 return key + iter->prefix_len; |
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309 } |
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310 if (ret < 0) |
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311 iter->failed = TRUE; |
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312 dict_iterate_deinit(&iter->dict_iter); |
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313 |
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314 if (iter->iter_idx < array_count(&iter->iter_ids)) { |
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315 /* get to the next iterator */ |
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316 acl_lookup_dict_iterate_start(iter); |
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317 return acl_lookup_dict_iterate_visible_next(iter); |
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318 } |
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319 return NULL; |
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320 } |
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321 |
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322 int acl_lookup_dict_iterate_visible_deinit(struct acl_lookup_dict_iter **_iter) |
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323 { |
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324 struct acl_lookup_dict_iter *iter = *_iter; |
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325 int ret = iter->failed ? -1 : 0; |
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326 |
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327 *_iter = NULL; |
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328 if (iter->dict_iter != NULL) |
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329 dict_iterate_deinit(&iter->dict_iter); |
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330 pool_unref(&iter->pool); |
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331 return ret; |
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332 } |