{"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 juurdep\u00e4\u00e4su rakendamine Row Level Security kasutamisega PostgreSQLis.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Teema arendamine Et\u00fc\u00fcd PostgreSQL-i ridade taseme turvameetmete rakendamisest<\/a><\/noindex> ja laiendatud vastuse jaoks<\/b> . Tundub, et kommentaar.<\/a><\/noindex><\/p>\n

Kasutatud strateegia eeldab kontseptsiooni \"\u00c4riloogika andmebaasis\", mida on veidi l\u00e4hemalt kirjeldatud siin \u2014 Et\u00fc\u00fcd \u00e4riloogika rakendamisest PostgreSQL-i salvestatud protseduuride tasandil<\/a><\/noindex><\/p>\n

Teoreetiline osa on dokumentatsioonis suurep\u00e4raselt kirjeldatud Postgres Pro<\/a><\/noindex> \u2014 Ridade kaitse poliitikad<\/a><\/noindex>. Allpool k\u00e4sitletakse konkreetse rakendamise praktikat konkreetse \u00e4ri\u00fclesande \u2014 andmete juurdep\u00e4\u00e4su rollimudeli.<\/b><\/p>\n

\"Rollimudeli<\/p>\n

Artiklis ei ole midagi uut, pole peidetud t\u00e4hendust ega saladusi. Lihtsalt visand teoreetilise idee praktilisest rakendamisest. Kui see huvitab, lugege. Kui ei, siis \u00e4rge raisake oma aega.<\/p><\/blockquote>\n

<\/a><\/noindex><\/p>\n

\u00dclesande seadmine<\/h2>\n

\nOn vajalik piirata juurdep\u00e4\u00e4su dokumendi vaatamiseks\/sisestamiseks\/muutmiseks\/kustutamiseks vastavalt rakenduse kasutaja rollile. Rolli all m\u00f5istetakse kirjet tabelis roles<\/b> paljusid-mitme suhetega tabeliga users<\/b>. Tabelite rakenduse \u00fcksikasjad, lihtsuse t\u00f5ttu, j\u00e4etakse v\u00e4lja. Samuti j\u00e4etakse v\u00e4lja spetsiifilised rakenduse detailid, mis on seotud ainevaldkonnaga.<\/p>\n

Rakendamine<\/h2>\n

<\/p>\n

Loome rollid, skeemid, tabeli<\/h4>\n

<\/p>\n

Andmebaasi objektide loomine<\/b><\/p>\n

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>\n
Loome funktsioonid RLS rakendamiseks<\/h4>\n
\nKontrolli, kas saab SELECT rida teostada<\/p>\n
                        check_select<\/b><\/p>\n
Loo ja asenda funktsioon store.check_select ( current_id store.docs.id%TYPE ) RETURNS boolean AS $$\nDECLARE\n  result boolean ;\n  curr_pid integer ;\n  curr_stat_id integer ;\n  doc_man_id integer ;\nBEGIN \n  -- DBA-l on juurdep\u00e4\u00e4s k\u00f5igile dokumentidele\n  IF SESSION_USER = 'curr_dba'\n  THEN\n    RETURN TRUE ;\n  END IF ;\n  --------------------------------\n\n  -- Kui dokument on m\u00e4rgistatud 'kustutatud', siis ei n\u00e4idata seda valikus\n  SELECT\n    is_del\n  INTO\n    result\n  FROM\n    store.docs\n  WHERE\n    id = current_id ;\n IF result = TRUE\n THEN\n   RETURN FALSE ;\n END IF ;\n --------------------------------\n\n -- Saada praeguse kasutaja id\n SELECT\n   service_function.get_curr_pid ()\n INTO\n   curr_pid ;\n --------------------------------\n\n -- Saada dokumendi halduri id\n SELECT\n   man_id\n INTO\n   doc_man_id\n FROM\n   store.docs\n WHERE\n   id = current_id ;\n --------------------------------\n\n -- Kui dokumendi haldur ei ole praegune kasutaja v\u00f5i haldurit ei ole m\u00e4\u00e4ratud\n -- lisa dokument valikusse\n IF doc_man_id != curr_pid OR doc_man_id IS NULL\n THEN\n   RETURN TRUE  ;\n ELSE\n   -- Saada dokumendi praegune staatus\n   SELECT\n     stat_id                                         \n   INTO\n     curr_statid\n   FROM\n     store.docs\n   WHERE\n     id = current_id ;\n    \n   -- Kui staatus lubab dokumenti vaadata - lisa dokument valikusse                     \n   IF curr_statid = 4 OR curr_statid = 9\n   THEN\n     RETURN TRUE ;\n   ELSE\n   -- Muidu - v\u00e4lista dokument valikust\n     RETURN FALSE ;\n    END IF ;\n  END IF ;\n  --------------------------------\n\n RETURN FALSE ;\nEND\n$$ 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
\nKontrolli, kas rida on v\u00f5imalik sisestada<\/p>\n
                        check_insert<\/b><\/p>\n
Loo ja asenda funktsioon store.check_insert ( current_id store.docs.id%TYPE ) RETURNS boolean AS $$\nDECLARE\n  curr_role_id integer ;\nBEGIN\n  -- DBA v\u00f5ib rida igal juhul lisada\n  IF SESSION_USER = 'curr_dba'\n  THEN\n    RETURN TRUE ;\n  END IF ;\n  --------------------------------\n\n -- Saada praeguse kasutaja rolli id \n SELECT\n   service_functions.current_rid()\n  INTO\n    curr_role_id ;\n --------------------------------\n\n-- Kui roll v\u00f5imaldab uue dokumendi loomist\n-- luba\nIF curr_role_id = 3 OR curr_role_id = 5     \nTHEN\n  RETURN TRUE ;\nEND IF ;\n--------------------------------\nRETURN FALSE  ;\nEND\n$$ 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
\nKontrolli, kas rida on v\u00f5imalik kustutada<\/p>\n
                        check_delete<\/b><\/p>\n
Loo ja asenda funktsioon 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
\nKontrolli, kas rida on v\u00f5imalik uuendada.<\/p>\n
                        update_using<\/b><\/p>\n
Looja v\u00f5i asenda funktsioon store.update_using ( current_id store.docs.id%TYPE , is_del boolean )\nTULEMUSED boolean NAGU $$\nALUSTA  \n   --Dokumendid, millel on olek 'kustutatud' - ei redigeerita\n   KUI is_del \n   SEE\n     TAGASTA FALSE ;\n MUU\n    TAGASTA TRUE ;\n  L\u00d5PETA\n\nL\u00d5PETA\n$$ KEEL plpgsql SECURITY DEFINER;\nMUUDA FUNKTSIOON store.update_using( store.docs.id%TYPE , boolean ) OMANIK KAUPO ;\nT\u00dcHISTA EXECUTE FUNKTSIOONIL store.update_using( store.docs.id%TYPE , boolean ) PUBLIC;\nANDA EXECUTE FUNKTSIOONILE store.update_using( store.docs.id%TYPE ) SERVICE_FUNCTIONS;<\/code><\/pre>\n
<\/p>\n
                        update_check<\/b><\/p>\n
Looja v\u00f5i asenda funktsioon store.update_with_check ( current_id store.docs.id%TYPE , is_del boolean )\nTULEMUSED boolean NAGU $$\nDECLARE\n  current_rid integer ;\n  current_statid integer ;\nALUSTA                \n\n  --DBA saab vaadata rida \n  KUI SESSION_USER = 'curr_dba'\n  SEE\n    TAGASTA TRUE ;\n  L\u00d5PETA\n  --------------------------------\n\n --Hangi praegune kasutaja rolli id \n VALI\n   service_functions.current_rid()\n  INTO\n    curr_role_id ;\n --------------------------------                            \n\n --Dokumendi kustutamine - seisundi muutmine \n KUI is_deleted\n SEE\n   --Kui kasutaja roll ***\n   KUI current_role_id = 3        \n   SEE\n      VALI\n        stat_id                                          \n      INTO\n        curr_statid\n      FROM\n        store.docs\n      KUS\n        id = current_id ;\n\n      --Dokument olekus *** ei saa kustutada \n      KUI current_status_id = 11\n      SEE\n         TAGASTA FALSE ;\n      MUU\n      --Dokumente saab kustutada teistes olekutes\n        TAGASTA TRUE ;\n      L\u00d5PETA\n\n    --Vastasel juhul, kui kasutaja roll ***\n    ELSIF current_role_id = 5            \n    SEE\n      --K\u00f5ik dokumentide olekud \n      TAGASTA TRUE ;\n    MUU\n      --Teised kasutajad ei saa dokumente kustutada\n      TAGASTA FALSE ;\n    L\u00d5PETA\n ELSE      \n   --Dokumendi uuendamine on lubatud\n    TAGASTA TRUE ;\nL\u00d5PETA\n\nTAGASTA FALSE ;\nL\u00d5PETA\n$$ KEEL plpgsql SECURITY DEFINER;\nMUUDA FUNKTSIOON store.update_with_check( storg.docs.id%TYPE ,  boolean ) OMANIK KAUPO ;\nT\u00dcHISTA EXECUTE FUNKTSIOONIL store.update_with_check( storg.docs.id%TYPE ,  boolean )  PUBLIC;\nANDA EXECUTE FUNKTSIOONILE store.update_with_check( store.docs.id%TYPE ) SERVICE_FUNCTIONS;<\/code><\/pre>\n
\nRidade tasandi turbe poliitika sissel\u00fclitamine tabelis.<\/p>\n
                        LUBA RIDADE TASANDI TURVE<\/b><\/p>\n
MUUDA TABELIT store.docs LUBA RIDADE TASANDI TURVE ;\n\nLOO POLIITIKA doc_select STORE.docs VALIKU KAUPO service_functions KASUTADES ( (VALI store.check_select(id)) );\nLOO POLIITIKA doc_insert STORE.docs INSERT KAUPO service_functions KONTROLLIDE ( (VALI store.check_insert(id)) );\nLOO POLIITIKA docs_delete STORE.docs KUSTUTAMINE KAUPO service_functions KASUTADES ( (VALI store.check_delete(id)) );\n\nLOO POLIITIKA doc_update_using STORE.docs UUENDAMINE KAUPO service_functions KASUTADES ( (VALI store.update_using(id , is_del )) );\nLOO POLIITIKA doc_update_check STORE.docs UUENDAMINE KAUPO service_functions KONTROLLIDE ( (VALI store.update_with_check(id , is_del )) );<\/code><\/pre>\n
<\/p>\n
Kokkuv\u00f5te<\/h2>\n
\nSee t\u00f6\u00f6tab.<\/p>\n
Ettepanekute strateegia v\u00f5imaldas edastada rollimudeli teostamise tasemelt \u00e4rifunktsioonide tasemele andmeh\u00f5ive tasemele. <\/p>\n
Funktsioone saab kasutada \u0161abloonina keerukamate andmete varjamise mudelite rakendamiseks, kui \u00e4ri n\u00f5uded seda n\u00f5uavad.
\n
Allikas: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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