annotate schema/manage_users.sql @ 3678:8f58851927c0

client: make layer factory only return new layer config for individual maps instead of each time it is invoked. The purpose of the factory was to support multiple maps with individual layers. But returning a new config each time it is invoked leads to bugs that rely on the layer's state. Now this factory reuses the same objects it created before, per map.
author Markus Kottlaender <markus@intevation.de>
date Mon, 17 Jun 2019 17:31:35 +0200
parents 69292eb68984
children 5466562cca60
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rev   line source
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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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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_country()
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62 RETURNS internal.user_profiles.country%TYPE
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63 AS $$
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64 SELECT country FROM users.list_users
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65 WHERE username = current_user
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66 $$
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67 LANGUAGE SQL
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68 STABLE PARALLEL SAFE;
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69
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70
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71 CREATE OR REPLACE FUNCTION users.current_user_area_utm()
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72 RETURNS geometry
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73 AS $$
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74 DECLARE utm_area geometry;
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75 BEGIN
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76 SELECT ST_Transform(area::geometry, best_utm(area))
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77 INTO STRICT utm_area
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78 FROM users.responsibility_areas
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79 WHERE country = users.current_user_country();
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80 RETURN utm_area;
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81 END;
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82 $$
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83 LANGUAGE plpgsql
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84 STABLE PARALLEL SAFE;
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85
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86
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87 CREATE OR REPLACE FUNCTION users.utm_covers(g geography) RETURNS boolean AS
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88 $$
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89 SELECT ST_Covers(a, ST_Transform(g::geometry, ST_SRID(a)))
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90 FROM users.current_user_area_utm() AS a (a)
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91 $$
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92 LANGUAGE SQL
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93 STABLE PARALLEL SAFE;
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94
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95
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96 CREATE OR REPLACE FUNCTION internal.create_user() RETURNS trigger
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97 AS $$
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98 BEGIN
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99 IF NEW.map_extent IS NULL
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100 THEN
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101 NEW.map_extent = ST_Extent(CAST(area AS geometry))
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102 FROM users.responsibility_areas ra
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103 WHERE ra.country = NEW.country;
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104 END IF;
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105 INSERT INTO internal.user_profiles (
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106 username, country, map_extent, email_address)
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107 VALUES (NEW.username, NEW.country, NEW.map_extent, NEW.email_address);
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108 EXECUTE format(
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109 'CREATE ROLE %I IN ROLE %I LOGIN PASSWORD %L',
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110 NEW.username,
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111 NEW.rolname,
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112 internal.check_password(NEW.pw));
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113
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114 -- Do not leak new password
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115 NEW.pw = '';
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116 RETURN NEW;
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117 END;
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118 $$
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119 LANGUAGE plpgsql
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120 SECURITY DEFINER;
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121
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122 CREATE TRIGGER create_user INSTEAD OF INSERT ON users.list_users FOR EACH ROW
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123 EXECUTE PROCEDURE internal.create_user();
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124
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125 CREATE OR REPLACE FUNCTION internal.update_metamorph() RETURNS trigger
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126 AS $$
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127 BEGIN
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128 EXECUTE format('GRANT %I TO metamorph', NEW.username);
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129 RETURN NEW;
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130 END;
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131 $$
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132 LANGUAGE plpgsql
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133 SECURITY DEFINER;
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134
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135 -- Note that PostgreSQL fires triggers for the same event in alphabetical
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136 -- order! Make sure that the new role is created before this trigger is fired.
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137 CREATE TRIGGER update_metamorph INSTEAD OF INSERT ON users.list_users
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138 FOR EACH ROW
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139 EXECUTE PROCEDURE internal.update_metamorph();
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140
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141
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142 -- Prevent roles other than sys_admin to update any user but
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143 -- themselves (affects waterway_admin)
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144 CREATE OR REPLACE FUNCTION internal.authorize_update_user() RETURNS trigger
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145 AS $$
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146 BEGIN
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147 IF OLD.username <> current_user
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148 AND NOT pg_has_role('sys_admin', 'MEMBER')
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149 THEN
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150 RETURN NULL;
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151 ELSE
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152 RETURN NEW;
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153 END IF;
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154 END;
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155 $$
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156 LANGUAGE plpgsql;
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157
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158 -- Note that PostgreSQL fires triggers for the same event in alphabetical
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159 -- order! Make sure that authorization takes place before any other trigger
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160 -- is fired that might execute otherwise unauthorized statements!
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161 CREATE TRIGGER authorize_update_user INSTEAD OF UPDATE ON users.list_users
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162 FOR EACH ROW
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163 EXECUTE PROCEDURE internal.authorize_update_user();
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164
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165
307
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166 CREATE OR REPLACE FUNCTION internal.update_user() RETURNS trigger
225
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167 AS $$
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168 DECLARE
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169 cur_username varchar;
225
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170 BEGIN
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171 cur_username = OLD.username;
225
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172
268
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173 UPDATE internal.user_profiles p
233
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174 SET (username, country, map_extent, email_address)
307
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175 = (NEW.username, NEW.country, NEW.map_extent, NEW.email_address)
225
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176 WHERE p.username = cur_username;
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177
307
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178 IF NEW.username <> cur_username
225
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179 THEN
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180 EXECUTE format(
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181 'ALTER ROLE %I RENAME TO %I', cur_username, NEW.username);
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182 cur_username = NEW.username;
225
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183 END IF;
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184
307
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185 IF NEW.rolname <> OLD.rolname
225
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186 THEN
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187 EXECUTE format(
307
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188 'REVOKE %I FROM %I', OLD.rolname, cur_username);
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189 EXECUTE format(
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190 'GRANT %I TO %I', NEW.rolname, cur_username);
225
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191 END IF;
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192
307
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193 IF NEW.pw IS NOT NULL AND NEW.pw <> ''
225
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194 THEN
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195 EXECUTE format(
262
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196 'ALTER ROLE %I PASSWORD %L',
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197 cur_username,
312
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198 internal.check_password(NEW.pw));
225
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199 END IF;
307
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200
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201 -- Do not leak new password
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202 NEW.pw = '';
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203 RETURN NEW;
225
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204 END;
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205 $$
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206 LANGUAGE plpgsql
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207 SECURITY DEFINER;
232
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208
307
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209 CREATE TRIGGER update_user INSTEAD OF UPDATE ON users.list_users FOR EACH ROW
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210 EXECUTE PROCEDURE internal.update_user();
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211
232
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212
342
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213 CREATE OR REPLACE FUNCTION internal.delete_user() RETURNS trigger
232
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214 AS $$
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215 DECLARE
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216 bid int;
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217 BEGIN
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218 -- Terminate the users backends started before the current transaction
342
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219 FOR bid IN SELECT pid FROM pg_stat_activity WHERE usename = OLD.username
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220 LOOP
232
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221 PERFORM pg_terminate_backend(bid);
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222 END LOOP;
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223 -- Note that any backend that might be started during the transaction
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224 -- in which this function is executed will not be terminated but lost
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225 -- without any privileges after commiting this transaction
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226
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227 -- Delete user
342
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228 EXECUTE format('DROP ROLE %I', OLD.username);
268
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229 DELETE FROM internal.user_profiles p
342
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230 WHERE p.username = OLD.username;
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231
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232 RETURN OLD;
232
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233 END;
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234 $$
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235 LANGUAGE plpgsql
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236 SECURITY DEFINER;
319
ac760b0f22a9 Add special role for password reset
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237
342
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238 CREATE TRIGGER delete_user INSTEAD OF DELETE ON users.list_users FOR EACH ROW
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239 EXECUTE PROCEDURE internal.delete_user();
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240
319
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241
467
73c7b2d6246e Used hex-encoded usernames and a stored procedure to decode them to impersonate with the metamorph user.
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242 -- To set a role from a hex-encoded user name (which is save from SQL injections).
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243 CREATE OR REPLACE FUNCTION public.setrole(role text) RETURNS void
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244 AS $$
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245 BEGIN
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246 IF role IS NOT NULL AND role <> '' THEN
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247 EXECUTE format('SET ROLE %I', convert_from(decode(role, 'hex'), 'UTF-8'));
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diff changeset
248 END IF;
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parents: 463
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249 END;
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parents: 463
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250 $$
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diff changeset
251 LANGUAGE plpgsql;
468
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parents: 467
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252
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253 -- To set a role in form of a plannable statement (which is save from SQL injections).
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254 CREATE OR REPLACE FUNCTION public.setrole_plan(role text) RETURNS void
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255 AS $$
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256 BEGIN
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257 IF role IS NOT NULL AND role <> '' THEN
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258 EXECUTE format('SET ROLE %I', role);
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diff changeset
259 END IF;
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260 END;
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261 $$
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diff changeset
262 LANGUAGE plpgsql;