Mercurial > gemma
annotate schema/manage_users.sql @ 4434:0ca5e6c4f195
Added tag v4-preview20190918 for changeset b5619087e3e9
author | Sascha Wilde <wilde@intevation.de> |
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date | Wed, 18 Sep 2019 18:04:39 +0200 |
parents | 5e38667f740c |
children | baabc2b2f094 |
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1 -- This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 -- without warranty, see README.md and license for details. |
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3 |
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4 -- SPDX-License-Identifier: AGPL-3.0-or-later |
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5 -- License-Filename: LICENSES/AGPL-3.0.txt |
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6 |
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7 -- Copyright (C) 2018, 2019 by via donau |
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8 -- – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 -- Software engineering by Intevation GmbH |
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10 |
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11 -- Author(s): |
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12 -- * Tom Gottfried <tom@intevation.de> |
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13 -- * Sacha Teichmann <sascha.teichmann@intevation.de> |
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14 |
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15 -- |
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16 -- Functions encapsulating user management functionality and |
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17 -- exposing it to appropriately privileged users |
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18 -- |
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19 |
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20 CREATE OR REPLACE FUNCTION internal.check_password( |
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21 pw varchar |
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22 ) |
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23 RETURNS varchar |
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24 AS $$ |
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25 DECLARE |
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26 min_len CONSTANT int = 8; |
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27 BEGIN |
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28 IF char_length(pw) < min_len |
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29 OR pw NOT SIMILAR TO '%[^[:alnum:]]%' |
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30 OR pw NOT SIMILAR TO '%[[:digit:]]%' |
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31 THEN |
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32 RAISE invalid_password USING MESSAGE = 'Invalid password'; |
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33 ELSE |
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34 RETURN pw; |
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35 END IF; |
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36 END; |
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37 $$ |
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38 LANGUAGE plpgsql; |
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39 |
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40 |
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41 CREATE OR REPLACE VIEW users.list_users WITH (security_barrier) AS |
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42 SELECT |
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43 r.rolname, |
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44 p.username, |
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45 CAST('' AS varchar) AS pw, |
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46 p.country, |
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47 p.map_extent, |
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48 p.email_address |
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49 FROM internal.user_profiles p |
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50 JOIN pg_roles u ON p.username = u.rolname |
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51 JOIN pg_auth_members a ON u.oid = a.member |
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52 JOIN pg_roles r ON a.roleid = r.oid |
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53 WHERE p.username = current_user |
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54 OR pg_has_role('waterway_admin', 'MEMBER') |
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55 AND p.country = ( |
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56 SELECT country FROM internal.user_profiles |
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57 WHERE username = current_user) |
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58 OR pg_has_role('sys_admin', 'MEMBER'); |
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59 |
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60 |
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61 CREATE OR REPLACE FUNCTION users.current_user_area_utm() |
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62 RETURNS geometry |
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63 AS $$ |
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64 DECLARE utm_area geometry; |
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65 BEGIN |
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66 SELECT ST_Union(ST_Transform(area::geometry, z)) |
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67 INTO STRICT utm_area |
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68 FROM (SELECT area, |
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69 best_utm(ST_Collect(area::geometry) OVER ()) AS z |
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70 FROM users.stretches st |
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71 JOIN users.stretch_countries stc |
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72 ON stc.stretch_id = st.id |
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73 WHERE country = (SELECT country |
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74 FROM users.list_users |
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75 WHERE username = current_user)) AS st; |
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76 RETURN utm_area; |
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77 END; |
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78 $$ |
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79 LANGUAGE plpgsql |
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80 STABLE PARALLEL SAFE; |
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81 |
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82 |
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83 CREATE OR REPLACE FUNCTION users.utm_covers(g geography) RETURNS boolean AS |
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84 $$ |
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85 SELECT ST_Covers(a, ST_Transform(g::geometry, ST_SRID(a))) |
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86 FROM users.current_user_area_utm() AS a (a) |
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87 $$ |
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88 LANGUAGE SQL |
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89 STABLE PARALLEL SAFE; |
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90 |
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91 |
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92 CREATE OR REPLACE FUNCTION internal.create_user() RETURNS trigger |
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93 AS $$ |
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94 BEGIN |
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95 IF NEW.map_extent IS NULL |
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96 THEN |
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97 NEW.map_extent = ST_Extent(CAST(area AS geometry)) |
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98 FROM users.stretches st |
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99 JOIN users.stretch_countries stc ON stc.stretch_id = st.id |
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100 WHERE stc.country = NEW.country; |
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101 END IF; |
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102 INSERT INTO internal.user_profiles ( |
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103 username, country, map_extent, email_address) |
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104 VALUES (NEW.username, NEW.country, NEW.map_extent, NEW.email_address); |
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105 EXECUTE format( |
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106 'CREATE ROLE %I IN ROLE %I LOGIN PASSWORD %L', |
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107 NEW.username, |
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108 NEW.rolname, |
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109 internal.check_password(NEW.pw)); |
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110 |
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111 -- Do not leak new password |
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112 NEW.pw = ''; |
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113 RETURN NEW; |
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114 END; |
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115 $$ |
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116 LANGUAGE plpgsql |
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117 SECURITY DEFINER; |
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118 |
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119 CREATE TRIGGER create_user INSTEAD OF INSERT ON users.list_users FOR EACH ROW |
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120 EXECUTE PROCEDURE internal.create_user(); |
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121 |
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122 CREATE OR REPLACE FUNCTION internal.update_metamorph() RETURNS trigger |
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123 AS $$ |
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124 BEGIN |
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125 EXECUTE format('GRANT %I TO metamorph', NEW.username); |
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126 RETURN NEW; |
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127 END; |
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128 $$ |
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129 LANGUAGE plpgsql |
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130 SECURITY DEFINER; |
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131 |
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132 -- Note that PostgreSQL fires triggers for the same event in alphabetical |
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133 -- order! Make sure that the new role is created before this trigger is fired. |
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134 CREATE TRIGGER update_metamorph INSTEAD OF INSERT ON users.list_users |
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135 FOR EACH ROW |
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136 EXECUTE PROCEDURE internal.update_metamorph(); |
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137 |
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138 |
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139 -- Prevent roles other than sys_admin to update any user but |
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140 -- themselves (affects waterway_admin) |
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141 CREATE OR REPLACE FUNCTION internal.authorize_update_user() RETURNS trigger |
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142 AS $$ |
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143 BEGIN |
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144 IF OLD.username <> current_user |
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145 AND NOT pg_has_role('sys_admin', 'MEMBER') |
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146 THEN |
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147 RETURN NULL; |
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148 ELSE |
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149 RETURN NEW; |
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150 END IF; |
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151 END; |
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152 $$ |
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153 LANGUAGE plpgsql; |
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154 |
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155 -- Note that PostgreSQL fires triggers for the same event in alphabetical |
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156 -- order! Make sure that authorization takes place before any other trigger |
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157 -- is fired that might execute otherwise unauthorized statements! |
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158 CREATE TRIGGER authorize_update_user INSTEAD OF UPDATE ON users.list_users |
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159 FOR EACH ROW |
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160 EXECUTE PROCEDURE internal.authorize_update_user(); |
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161 |
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162 |
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163 CREATE OR REPLACE FUNCTION internal.update_user() RETURNS trigger |
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164 AS $$ |
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165 DECLARE |
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166 cur_username varchar; |
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167 BEGIN |
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168 cur_username = OLD.username; |
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169 |
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170 UPDATE internal.user_profiles p |
233 | 171 SET (username, country, map_extent, email_address) |
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172 = (NEW.username, NEW.country, NEW.map_extent, NEW.email_address) |
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173 WHERE p.username = cur_username; |
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174 |
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175 IF NEW.username <> cur_username |
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176 THEN |
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177 EXECUTE format( |
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178 'ALTER ROLE %I RENAME TO %I', cur_username, NEW.username); |
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179 cur_username = NEW.username; |
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180 END IF; |
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181 |
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182 IF NEW.rolname <> OLD.rolname |
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183 THEN |
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184 EXECUTE format( |
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185 'REVOKE %I FROM %I', OLD.rolname, cur_username); |
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186 EXECUTE format( |
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187 'GRANT %I TO %I', NEW.rolname, cur_username); |
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188 END IF; |
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189 |
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190 IF NEW.pw IS NOT NULL AND NEW.pw <> '' |
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191 THEN |
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192 EXECUTE format( |
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193 'ALTER ROLE %I PASSWORD %L', |
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194 cur_username, |
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195 internal.check_password(NEW.pw)); |
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196 END IF; |
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197 |
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198 -- Do not leak new password |
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199 NEW.pw = ''; |
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200 RETURN NEW; |
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201 END; |
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202 $$ |
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203 LANGUAGE plpgsql |
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204 SECURITY DEFINER; |
232
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205 |
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206 CREATE TRIGGER update_user INSTEAD OF UPDATE ON users.list_users FOR EACH ROW |
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207 EXECUTE PROCEDURE internal.update_user(); |
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208 |
232
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209 |
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210 CREATE OR REPLACE FUNCTION internal.delete_user() RETURNS trigger |
232
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211 AS $$ |
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212 DECLARE |
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213 bid int; |
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214 BEGIN |
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215 -- Terminate the users backends started before the current transaction |
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216 FOR bid IN SELECT pid FROM pg_stat_activity WHERE usename = OLD.username |
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217 LOOP |
232
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218 PERFORM pg_terminate_backend(bid); |
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219 END LOOP; |
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220 -- Note that any backend that might be started during the transaction |
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221 -- in which this function is executed will not be terminated but lost |
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222 -- without any privileges after commiting this transaction |
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223 |
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224 -- Delete user |
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225 EXECUTE format('DROP ROLE %I', OLD.username); |
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226 DELETE FROM internal.user_profiles p |
342
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227 WHERE p.username = OLD.username; |
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228 |
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229 RETURN OLD; |
232
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230 END; |
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231 $$ |
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232 LANGUAGE plpgsql |
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233 SECURITY DEFINER; |
319
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234 |
342
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235 CREATE TRIGGER delete_user INSTEAD OF DELETE ON users.list_users FOR EACH ROW |
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236 EXECUTE PROCEDURE internal.delete_user(); |
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237 |
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238 |
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239 -- To set a role from a hex-encoded user name (which is save from SQL injections). |
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240 CREATE OR REPLACE FUNCTION public.setrole(role text) RETURNS void |
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241 AS $$ |
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242 BEGIN |
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243 IF role IS NOT NULL AND role <> '' THEN |
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244 EXECUTE format('SET ROLE %I', convert_from(decode(role, 'hex'), 'UTF-8')); |
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245 END IF; |
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246 END; |
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247 $$ |
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248 LANGUAGE plpgsql; |
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249 |
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250 -- To set a role in form of a plannable statement (which is save from SQL injections). |
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251 CREATE OR REPLACE FUNCTION public.setrole_plan(role text) RETURNS void |
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252 AS $$ |
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253 BEGIN |
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254 IF role IS NOT NULL AND role <> '' THEN |
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255 EXECUTE format('SET ROLE %I', role); |
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256 END IF; |
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257 END; |
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258 $$ |
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259 LANGUAGE plpgsql; |