Mercurial > gemma

annotate schema/manage_users.sql @ 5700:45240edad249 sr-v2

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Make Go 1.21 compatible.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 13 Feb 2024 23:05:59 +0100
parents 5e3e3d9e2c23
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 FUNCTION users.current_user_area_utm()
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42 RETURNS geometry
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43 AS $$
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44 DECLARE utm_area geometry;
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45 BEGIN
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46 SELECT ST_Union(ST_Transform(area::geometry, z))
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47 INTO STRICT utm_area
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48 FROM (SELECT area,
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49 best_utm(ST_Collect(area::geometry) OVER ()) AS z
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50 FROM users.stretches st
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51 JOIN users.stretch_countries stc
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52 ON stc.stretch_id = st.id
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53 WHERE country = (SELECT country
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54 FROM users.list_users
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55 WHERE username = current_user)) AS st;
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56 RETURN utm_area;
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57 END;
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58 $$
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59 LANGUAGE plpgsql
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60 STABLE PARALLEL SAFE;
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61
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62
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63 CREATE OR REPLACE FUNCTION internal.create_user() RETURNS trigger
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64 AS $$
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65 BEGIN
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66 IF NEW.map_extent IS NULL
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67 THEN
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68 NEW.map_extent = ST_Extent(CAST(area AS geometry))
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69 FROM users.stretches st
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70 JOIN users.stretch_countries stc ON stc.stretch_id = st.id
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71 WHERE stc.country = NEW.country;
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72 END IF;
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73
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74 IF NEW.username IS NOT NULL
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75 -- otherwise let the constraint on user_profiles speak
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76 THEN
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77 EXECUTE format(
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78 'CREATE ROLE %I IN ROLE %I LOGIN PASSWORD %L',
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79 NEW.username,
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80 NEW.rolname,
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81 internal.check_password(NEW.pw));
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82 END IF;
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83
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84 INSERT INTO internal.user_profiles (
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85 username, country, map_extent, email_address,
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86 report_reciever, active)
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87 VALUES (NEW.username, NEW.country, NEW.map_extent, NEW.email_address,
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88 NEW.report_reciever, NEW.active);
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89
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90 IF NEW.active THEN
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91 EXECUTE format(
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92 'ALTER ROLE %I LOGIN', NEW.username);
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93 ELSE
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94 EXECUTE format(
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95 'ALTER ROLE %I NOLOGIN', NEW.username);
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96 END IF;
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97
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98 -- Do not leak new password
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99 NEW.pw = '';
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100 RETURN NEW;
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101 END;
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102 $$
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103 LANGUAGE plpgsql
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104 SECURITY DEFINER;
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105
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106 CREATE TRIGGER create_user INSTEAD OF INSERT ON users.list_users FOR EACH ROW
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107 EXECUTE PROCEDURE internal.create_user();
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108
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109 CREATE OR REPLACE FUNCTION internal.update_metamorph() RETURNS trigger
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110 AS $$
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111 BEGIN
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112 EXECUTE format('GRANT %I TO metamorph', NEW.username);
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113 RETURN NEW;
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114 END;
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115 $$
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116 LANGUAGE plpgsql
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117 SECURITY DEFINER;
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118
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119 -- Note that PostgreSQL fires triggers for the same event in alphabetical
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120 -- order! Make sure that the new role is created before this trigger is fired.
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121 CREATE TRIGGER update_metamorph INSTEAD OF INSERT ON users.list_users
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122 FOR EACH ROW
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123 EXECUTE PROCEDURE internal.update_metamorph();
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124
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125
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126 -- Prevent roles other than sys_admin to update any user but
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127 -- themselves (affects waterway_admin)
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128 CREATE OR REPLACE FUNCTION internal.authorize_update_user() RETURNS trigger
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129 AS $$
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130 BEGIN
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131 IF OLD.username <> current_user
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132 AND NOT pg_has_role('sys_admin', 'MEMBER')
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133 THEN
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134 RETURN NULL;
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135 ELSE
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136 RETURN NEW;
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137 END IF;
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138 END;
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139 $$
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140 LANGUAGE plpgsql;
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141
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142 -- Note that PostgreSQL fires triggers for the same event in alphabetical
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143 -- order! Make sure that authorization takes place before any other trigger
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144 -- is fired that might execute otherwise unauthorized statements!
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145 CREATE TRIGGER authorize_update_user INSTEAD OF UPDATE ON users.list_users
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146 FOR EACH ROW
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147 EXECUTE PROCEDURE internal.authorize_update_user();
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148
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149
307
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150 CREATE OR REPLACE FUNCTION internal.update_user() RETURNS trigger
225
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151 AS $$
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152 DECLARE
307
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153 cur_username varchar;
225
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154 BEGIN
307
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155 cur_username = OLD.username;
225
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156
307
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157 IF NEW.username <> cur_username
225
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158 THEN
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159 EXECUTE format(
307
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160 'ALTER ROLE %I RENAME TO %I', cur_username, NEW.username);
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161 cur_username = NEW.username;
225
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162 END IF;
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163
4723
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164 UPDATE internal.user_profiles p
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165 SET (username, country, map_extent, email_address,
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166 report_reciever, active)
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167 = (NEW.username, NEW.country, NEW.map_extent, NEW.email_address,
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168 NEW.report_reciever, NEW.active)
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169 WHERE p.username = cur_username;
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170
307
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171 IF NEW.rolname <> OLD.rolname
225
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172 THEN
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173 EXECUTE format(
307
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174 'REVOKE %I FROM %I', OLD.rolname, cur_username);
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175 EXECUTE format(
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176 'GRANT %I TO %I', NEW.rolname, cur_username);
225
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177 END IF;
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178
307
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179 IF NEW.pw IS NOT NULL AND NEW.pw <> ''
225
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180 THEN
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181 EXECUTE format(
262
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182 'ALTER ROLE %I PASSWORD %L',
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183 cur_username,
312
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184 internal.check_password(NEW.pw));
225
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185 END IF;
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186
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187 IF NEW.active <> OLD.active THEN
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188 IF NEW.active THEN
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189 EXECUTE format(
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190 'ALTER ROLE %I LOGIN', cur_username);
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191 ELSE
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192 EXECUTE format(
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193 'ALTER ROLE %I NOLOGIN', cur_username);
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194 END IF;
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195 END IF;
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196
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197 -- Do not leak new password
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198 NEW.pw = '';
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199 RETURN NEW;
225
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200 END;
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201 $$
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202 LANGUAGE plpgsql
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203 SECURITY DEFINER;
232
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204
307
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205 CREATE TRIGGER update_user INSTEAD OF UPDATE ON users.list_users FOR EACH ROW
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206 EXECUTE PROCEDURE internal.update_user();
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207
232
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208
342
c6bd6ed18942 Use INSTEAD OF trigger for user deletion
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209 CREATE OR REPLACE FUNCTION internal.delete_user() RETURNS trigger
232
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210 AS $$
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211 DECLARE
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212 bid int;
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213 BEGIN
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214 -- Terminate the users backends started before the current transaction
342
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215 FOR bid IN SELECT pid FROM pg_stat_activity WHERE usename = OLD.username
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216 LOOP
232
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217 PERFORM pg_terminate_backend(bid);
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218 END LOOP;
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219 -- Note that any backend that might be started during the transaction
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220 -- in which this function is executed will not be terminated but lost
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221 -- without any privileges after commiting this transaction
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222
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223 -- Delete user
342
c6bd6ed18942 Use INSTEAD OF trigger for user deletion
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224 EXECUTE format('DROP ROLE %I', OLD.username);
268
72062ca52746 Make user_profiles table invisible for users
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225 DELETE FROM internal.user_profiles p
342
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226 WHERE p.username = OLD.username;
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diff changeset
227
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228 RETURN OLD;
232
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diff changeset
229 END;
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diff changeset
230 $$
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diff changeset
231 LANGUAGE plpgsql
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parents: 225
diff changeset
232 SECURITY DEFINER;
319
ac760b0f22a9 Add special role for password reset
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parents: 312
diff changeset
233
342
c6bd6ed18942 Use INSTEAD OF trigger for user deletion
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diff changeset
234 CREATE TRIGGER delete_user INSTEAD OF DELETE ON users.list_users FOR EACH ROW
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diff changeset
235 EXECUTE PROCEDURE internal.delete_user();
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diff changeset
236
467
73c7b2d6246e Used hex-encoded usernames and a stored procedure to decode them to impersonate with the metamorph user.
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diff changeset
237 -- To set a role from a hex-encoded user name (which is save from SQL injections).
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diff changeset
238 CREATE OR REPLACE FUNCTION public.setrole(role text) RETURNS void
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diff changeset
239 AS $$
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diff changeset
240 BEGIN
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diff changeset
241 IF role IS NOT NULL AND role <> '' THEN
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242 EXECUTE format('SET ROLE %I', convert_from(decode(role, 'hex'), 'UTF-8'));
73c7b2d6246e Used hex-encoded usernames and a stored procedure to decode them to impersonate with the metamorph user.
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parents: 463
diff changeset
243 END IF;
73c7b2d6246e Used hex-encoded usernames and a stored procedure to decode them to impersonate with the metamorph user.
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parents: 463
diff changeset
244 END;
73c7b2d6246e Used hex-encoded usernames and a stored procedure to decode them to impersonate with the metamorph user.
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parents: 463
diff changeset
245 $$
73c7b2d6246e Used hex-encoded usernames and a stored procedure to decode them to impersonate with the metamorph user.
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parents: 463
diff changeset
246 LANGUAGE plpgsql;
468
ff9dbe14f033 Don't use hex encoding for user impersonation when running it from a planned statement.
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parents: 467
diff changeset
247
ff9dbe14f033 Don't use hex encoding for user impersonation when running it from a planned statement.
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parents: 467
diff changeset
248 -- To set a role in form of a plannable statement (which is save from SQL injections).
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parents: 467
diff changeset
249 CREATE OR REPLACE FUNCTION public.setrole_plan(role text) RETURNS void
ff9dbe14f033 Don't use hex encoding for user impersonation when running it from a planned statement.
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parents: 467
diff changeset
250 AS $$
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parents: 467
diff changeset
251 BEGIN
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diff changeset
252 IF role IS NOT NULL AND role <> '' THEN
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diff changeset
253 EXECUTE format('SET ROLE %I', role);
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parents: 467
diff changeset
254 END IF;
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parents: 467
diff changeset
255 END;
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parents: 467
diff changeset
256 $$
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parents: 467
diff changeset
257 LANGUAGE plpgsql;