{"id":92114,"date":"2020-08-23T19:41:56","date_gmt":"2020-08-23T17:41:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/realizacziya-rolevoj-modeli-dostupa-s-ispolzovaniem-row-level-security-v-postgresql"},"modified":"2020-08-23T19:41:56","modified_gmt":"2020-08-23T17:41:56","slug":"realizacziya-rolevoj-modeli-dostupa-s-ispolzovaniem-row-level-security-v-postgresql","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/realizacziya-rolevoj-modeli-dostupa-s-ispolzovaniem-row-level-security-v-postgresql","title":{"rendered":"Rollimudeli juurutamine Row Level Security kasutamisega PostgreSQL-is","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Teema arendamine <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/515896\/\">Et\u00fc\u00fcd Row Level Security rakendamisest PostgreSQL-is<\/a><\/noindex> ja <b>detailse vastuse jaoks<\/b> j\u00e4rgnevaga <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/515628\/#comment_21973176\">kommentaar.<\/a><\/noindex><\/p>\n<p>Kasutatud strateegia h\u00f5lmab \u201e\u00c4rilogika andmebaasis\u201c kontseptsiooni, millest on veidi rohkem r\u00e4\u00e4kida siin \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/515628\/\">Et\u00fc\u00fcd \u00e4rilogika rakendamisest PostgreSQL-i salvestatud funktsioonide tasemel<\/a><\/noindex><\/p>\n<p>Teoreetiline osa on h\u00e4sti kirjeldatud dokumentatsioonis <noindex><a rel=\"nofollow\" href=\"https:\/\/postgrespro.ru\/\">Postgres Pro<\/a><\/noindex> \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/postgrespro.ru\/docs\/postgrespro\/11\/ddl-rowsecurity\">Ridade kaitse poliitikad<\/a><\/noindex>. Allpool on k\u00e4sitletud praktilist rakendamist <b>konkreetse \u00e4ri\u00fclesande \u2014 andmete juurde p\u00e4\u00e4semise rollimudelit.<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Rollimudeli juurutamine Row Level Security kasutamisega PostgreSQL-is\" src=\"\/wp-content\/uploads\/2020\/08\/df69397b8638421732a67e457c99857c.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<blockquote><p>Artiklis ei ole midagi uut, ei ole varjatud m\u00f5tet ega salajasi teadmisi. Lihtsalt joonistamine teoreetilise idee praktilisest elluviimisest. Kui kedagi huvitab \u2014 lugege. Kui ei huvita \u2014 \u00e4rge kulutage oma aega raisku.<\/p><\/blockquote>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>\u00dclesande seadmine<\/h2>\n<p>\nOn vajalik piirata juurdep\u00e4\u00e4su dokumendi vaatamisele\/sisestamisele\/muutmisele\/kustutamisele vastavalt rakenduse kasutaja rollile. Rolli all m\u00f5istetakse kirjet tabelis <b>roles<\/b> millel on paljusid-mitmeid suhteid tabeliga <b>users<\/b>. Tabelite rakenduse \u00fcksikasjad on j\u00e4etud v\u00e4lja nende triviaalsete iseloomu t\u00f5ttu. Samuti on v\u00e4lja j\u00e4etud spetsiifilised rakenduse \u00fcksikasjad, mis on seotud teemaga.<\/p>\n<h2>Rakendus<\/h2>\n<p><\/p>\n<h4>Loome rolle, skeeme, tabeli<\/h4>\n<p><\/p>\n<p>                        <b class=\"spoiler_title\">Andmebaasi objektide loomine<\/b><\/p>\n<pre><code class=\"pgsql\">CREATE ROLE store;\nCREATE SCHEMA store AUTHORIZATION store;\nCREATE TABLE store.docs\n(\n  id integer ,         --dokumendi ID\n  man_id integer , --dokumendi halduri ID\n  stat_id integer ,  --dokumendi staatuse ID\n  ...\n  is_del BOOLEAN DEFAULT FALSE \n);\nALTER TABLE store.docs ADD CONSTRAINT doc_pk PRIMARY KEY (id);\nALTER TABLE store.docs OWNER TO store ;\n<\/code><\/pre>\n<p><\/p>\n<h4>Loome funktsioone RLS-i rakendamiseks<\/h4>\n<p>\nKontrollime v\u00f5imalust t\u00e4ita SELECT rida<\/p>\n<p>                        <b class=\"spoiler_title\">check_select<\/b><\/p>\n<pre><code class=\"pgsql\">CREATE OR REPLACE FUNCTION store.check_select ( current_id store.docs.id%TYPE ) RETURNS boolean AS $$\nDECLARE\n  result boolean ;\n  curr_pid integer ;\n  curr_stat_id integer ;\n  doc_man_id integer ;\nBEGIN \n  -- DBA-l on juurdep\u00e4\u00e4s k\u00f5igile dokumentidele\n  IF SESSION_USER = 'curr_dba'\n  THEN\n    RETURN TRUE ;\n  END IF ;\n  --------------------------------\n\n  --Kui dokument on m\u00e4rgistatud kui 'kustutatud', siis ei kuvata seda valikus\n  SELECT\n    is_del\n  INTO\n    result\n  FROM\n    store.docs\n  WHERE\n    id = current_id ;\n IF result = TRUE\n THEN\n   RETURN FALSE ;\n END IF ;\n --------------------------------\n\n --Saada praeguse kasutaja id\n SELECT\n   service_function.get_curr_pid ()\n INTO\n   curr_pid ;\n --------------------------------\n\n --Saada dokumendi halduri id\n SELECT\n   man_id\n INTO\n   doc_man_id\n FROM\n   store.docs\n WHERE\n   id = current_id ;\n --------------------------------\n\n --Kui dokumendi haldur ei ole praegune kasutaja v\u00f5i haldurit ei ole m\u00e4\u00e4ratud\n --lisatakse dokument valikusse\n IF doc_man_id != curr_pid OR doc_man_id IS NULL\n THEN\n   RETURN TRUE  ;\n ELSE\n   --Saada dokumendi praegune staatuse id\n   SELECT\n     stat_id                                         \n   INTO\n     curr_statid\n   FROM\n     store.docs\n   WHERE\n     id = current_id ;\n    \n   --Kui staatuse id lubab dokumenti n\u00e4ha, siis lisatakse dokument valikusse                     \n   IF curr_statid = 4 OR curr_statid = 9\n   THEN\n     RETURN TRUE ;\n   ELSE\n   --Muul juhul - v\u00e4listada dokument valikust\n     RETURN FALSE ;\n    END IF ;\n  END IF ;\n  --------------------------------\n\n RETURN FALSE ;\nEND\n$$ LANGUAGE plpgsql SECURITY DEFINER;\nALTER FUNCTION store.check_select( store.docs.id%TYPE  ) OWNER TO store ;\nREVOKE EXECUTE ON FUNCTION store.check_select( store.docs.id%TYPE  ) FROM public; \nGRANT EXECUTE ON FUNCTION store.check_select( store.docs.id%TYPE  ) TO service_functions; \n<\/code><\/pre>\n<p>\nKontrolli INSERT-i ridade t\u00e4itmise v\u00f5imalust<\/p>\n<p>                        <b class=\"spoiler_title\">check_insert<\/b><\/p>\n<pre><code class=\"pgsql\">CREATE OR REPLACE FUNCTION store.check_insert ( current_id store.docs.id%TYPE ) RETURNS boolean AS $$\nDECLARE\n  curr_role_id integer ;\nBEGIN\n  --DBA v\u00f5ib rida igal juhul lisada\n  IF SESSION_USER = 'curr_dba'\n  THEN\n    RETURN TRUE ;\n  END IF ;\n  --------------------------------\n\n --Hankige praeguse kasutaja rolli ID \n SELECT\n   service_functions.current_rid()\n  INTO\n    curr_role_id ;\n --------------------------------\n\n--Kui roll lubab uue dokumendi loomist\n--luba\nIF curr_role_id = 3 OR curr_role_id = 5     \nTHEN\n  RETURN TRUE ;\nEND IF ;\n--------------------------------\nRETURN FALSE  ;\nEND\n$$ LANGUAGE plpgsql SECURITY DEFINER;\nALTER FUNCTION store.check_insert( store.docs.id%TYPE  ) OWNER TO store ;\nREVOKE EXECUTE ON FUNCTION store.check_insert( store.docs.id%TYPE  ) FROM public;\nGRANT EXECUTE ON FUNCTION store.check_insert( store.docs.id%TYPE  ) TO service_functions; \n<\/code><\/pre>\n<p>\nKontrolli DELETE-i ridade t\u00e4itmise v\u00f5imalust<\/p>\n<p>                        <b class=\"spoiler_title\">check_delete<\/b><\/p>\n<pre><code class=\"pgsql\">CREATE OR REPLACE FUNCTION store.check_delete ( current_id store.docs.id%TYPE )\nRETURNS boolean AS $$\nBEGIN  \n  --Ainult DBA v\u00f5ib rida kustutada \n  IF SESSION_USER = 'curr_dba'\n  THEN\n    RETURN TRUE ;\n  END IF ;\n  --------------------------------\n\n  RETURN FALSE ;\nEND\n$$ LANGUAGE plpgsql\nSECURITY DEFINER;\nALTER FUNCTION store.check_delete( store.docs.id%TYPE  ) OWNER TO store ;\nREVOKE EXECUTE ON FUNCTION store.check_delete( store.docs.id%TYPE  ) FROM public;<\/code><\/pre>\n<p>\nKontrolli UPDATE-i ridade t\u00e4itmise v\u00f5imalust.<\/p>\n<p>                        <b class=\"spoiler_title\">update_using<\/b><\/p>\n<pre><code class=\"pgsql\">LOOJA V\u00d5I ASENDAGE FUNKTSIOON store.update_using ( current_id store.docs.id%TYPE , is_del boolean  )\nRETURNS boolean AS $$\nBEGIN  \n   --Dokumendid, mille staatuseks on 'kustutatud' - neid ei tohi muuta\n   IF is_del \n   THEN\n     RETURN FALSE ;\n ELSE\n    RETURN TRUE ;\n  END IF ;\n\nEND\n$$ LANGUAGE plpgsql SECURITY DEFINER;\nALTER FUNCTION store.update_using(  store.docs.id%TYPE ,  boolean  ) OWNERSHIP TO store ;\nREVOKE EXECUTE ON FUNCTION store.update_using(  store.docs.id%TYPE ,  boolean  ) FROM public;\nGRANT EXECUTE ON FUNCTION store.update_using( store.docs.id%TYPE  ) TO service_functions;<\/code><\/pre>\n<p><\/p>\n<p>                        <b class=\"spoiler_title\">update_check<\/b><\/p>\n<pre><code class=\"pgsql\">CREATE OR REPLACE FUNCTION store.update_with_check ( current_id store.docs.id%TYPE , is_del boolean )\nRETURNS boolean AS $$\nDECLARE\n  current_rid integer ;\n  current_statid integer ;\nBEGIN                \n\n  --DBA saab rida vaadata \n  IF SESSION_USER = 'curr_dba'\n  THEN\n    RETURN TRUE ;\n  END IF ;\n  --------------------------------\n\n --Saada jumala id praeguse kasutaja jaoks \n SELECT\n   service_functions.current_rid()\n  INTO\n    curr_role_id ;\n --------------------------------                            \n\n --Dokumendi kustutamine - staatuse muutmine \n IF is_deleted\n THEN\n   --Kui kasutaja roll ***\n   IF current_role_id = 3        \n   THEN\n      SELECT\n        stat_id                                          \n      INTO\n        curr_statid\n      FROM\n        store.docs\n      WHERE\n        id = current_id ;\n\n      --Dokument staatuses *** ei tohi kustutada \n      IF current_status_id = 11\n      THEN\n         RETURN FALSE ;\n      ELSE\n      --Dokumendi kustutamine on lubatud teistes staatustes\n        RETURN TRUE ;\n      END IF ;\n\n    --Vastasel juhul, kui kasutaja roll ***\n    ELSIF current_role_id = 5            \n    THEN\n      --K\u00f5ik dokumendi staatused \n      RETURN TRUE ;\n    ELSE\n      --Teised kasutajad ei saa dokumente kustutada\n      RETURN FALSE ;\n    END IF ;\n ELSE      \n   --Dokumendi uuendamine on lubatud\n    RETURN TRUE ;\nEND IF ;\n\nRETURN FALSE ;\nEND\n$$ LANGUAGE plpgsql SECURITY DEFINER;\nALTER FUNCTION store.update_with_check( storg.docs.id%TYPE ,  boolean   ) OWNER TO store ;\nREVOKE EXECUTE ON FUNCTION store.update_with_check( storg.docs.id%TYPE ,  boolean   )  FROM public;\nGRANT EXECUTE ON FUNCTION store.update_with_check( store.docs.id%TYPE  ) TO service_functions;<\/code><\/pre>\n<p>\nRidade kr\u00fcptimispoliitika lubamine tabelis.<\/p>\n<p>                        <b class=\"spoiler_title\">LUBA RIDA KR\u00dcPTIMIST<\/b><\/p>\n<pre><code class=\"pgsql\">ALTER TABLE store.docs LUBA RIDA KR\u00dcPTIMIST ;\n\nCREATE POLICY doc_select ON store.docs FOR SELECT TO service_functions USING ( (SELECT store.check_select(id)) );\nCREATE POLICY doc_insert ON store.docs FOR INSERT TO service_functions WITH CHECK ( (SELECT store.check_insert(id)) );\nCREATE POLICY docs_delete ON store.docs FOR DELETE TO service_functions USING ( (SELECT store.check_delete(id)) );\n\nCREATE POLICY doc_update_using ON store.docs FOR UPDATE TO service_functions USING ( (SELECT store.update_using(id , is_del )) );\nCREATE POLICY doc_update_check ON store.docs FOR UPDATE TO service_functions  WITH CHECK ( (SELECT store.update_with_check(id , is_del )) );<\/code><\/pre>\n<p><\/p>\n<h2>Kokkuv\u00f5te<\/h2>\n<p>\nSee t\u00f6\u00f6tab.<\/p>\n<p>Soovitatud strateegia v\u00f5imaldas viia rollimudeli rakenduse \u00e4rifunktsioonide tasemelt andmete salvestamise tasemele. <\/p>\n<p>Funktsioone saab kasutada andmete varjatud mudelite rakendamise mallidena, kui \u00e4ri n\u00f5udmised seda n\u00f5uavad.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/516040\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0432\u0438\u0442\u0438\u0435 \u0442\u0435\u043c\u044b \u042d\u0442\u044e\u0434 \u043f\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Row Level Secutity \u0432 PostgreSQL \u0438 \u0434\u043b\u044f \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u043e\u0433\u043e \u043e\u0442\u0432\u0435\u0442\u0430 \u043d\u0430 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439. \u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u0441\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u044f \u043f\u043e\u0434\u0440\u0430\u0437\u0443\u043c\u0435\u0432\u0430\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u0438 \u00ab\u0411\u0438\u0437\u043d\u0435\u0441-\u043b\u043e\u0433\u0438\u043a\u0430 \u0432 \u0411\u0414\u00bb, \u0447\u0442\u043e \u0431\u044b\u043b\u043e \u0447\u0443\u0442\u044c \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u0435\u0435 \u043e\u043f\u0438\u0441\u0430\u043d\u043e \u0437\u0434\u0435\u0441\u044c \u2014 \u042d\u0442\u044e\u0434 \u043f\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0431\u0438\u0437\u043d\u0435\u0441-\u043b\u043e\u0433\u0438\u043a\u0438 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u0445\u0440\u0430\u043d\u0438\u043c\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 PostgreSQL \u0422\u0435\u043e\u0440\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0447\u0430\u0441\u0442\u044c \u043e\u0442\u043b\u0438\u0447\u043d\u043e \u043e\u043f\u0438\u0441\u0430\u043d\u0430 \u0432 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438 Postgres Pro \u2014 \u041f\u043e\u043b\u0438\u0442\u0438\u043a\u0438 \u0437\u0430\u0449\u0438\u0442\u044b \u0441\u0442\u0440\u043e\u043a. \u041d\u0438\u0436\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":92115,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-92114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0420\u0430\u0437\u0432\u0438\u0442\u0438\u0435 \u0442\u0435\u043c\u044b \u042d\u0442\u044e\u0434 \u043f\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Row Level Secutity \u0432 PostgreSQL \u0438 \u0434\u043b\u044f \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u043e\u0433\u043e \u043e\u0442\u0432\u0435\u0442\u0430 \u043d\u0430 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439. 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