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module
imports
static-semantics/actions/functions
static-semantics/entities/annotations
static-semantics/types/built-ins
static-semantics/ui/template-calls
static-semantics/webdsl-actions
static-semantics/webdsl-built-ins
static-semantics/webdsl-entities
static-semantics/webdsl-types
static-semantics/webdsl
rules // built-ins
: scope * scope
declareACBuiltIns(, ) :- { }
bool == bool(s_resolve),
entity == entity(s_resolve),
new s_securityContext,
declareEntityAnnotation(s_securityContext, SESSIONENTITY()),
declareExtendScope(s_decl, "securityContext", s_securityContext), // declare s_type to be linked to type name
extendScopes(resolveExtendScope(s_decl, "securityContext"), s_securityContext),
declareType(s_decl, "securityContext", ENTITY("securityContext", s_securityContext)),
declareVar(s_decl, "securityContext", ENTITY("securityContext", s_securityContext)),
declareBuiltInFunction(s_decl, "loggedIn", [], bool),
declareBuiltInFunction(s_decl, "logout", [], entity),
declareBuiltInFunction(s_decl, "principalAsEntity", [], entity),
declareTemplate(s_decl, "login", []),
declareTemplate(s_decl, "logout", []),
declareTemplate(s_decl, "authentication", []).
typeOfFunctionCall(s, "loggedIn", []) = bool(s) :- principalDefined(s).
typeOfFunctionCall(s, "logout", []) = VOID() :- principalDefined(s).
typeOfFunctionCall(s, "principalAsEntity", []) = entity(s) :- principalDefined(s).
typeOfFunctionCall(, "authenticate", argExps) = bool(s) :- { }
principalDefined(s),
argTypes == typesOfExps(s, argExps),
credentialTypes == credentialTypes(s),
typesCompatible(argTypes, credentialTypes) == TRUE() | error $[Argument types [argTypes] not compatible with credential types [credentialTypes]].
templateCallMatchesSig(s, "login", [], _) :- principalDefined(s).
templateCallMatchesSig(s, "logout", [], _) :- principalDefined(s).
templateCallMatchesSig(s, "authenticate", [], _) :- principalDefined(s).
rules
sectionOk(s, AccessControlDefinition(_, defs)) :- acDefsOk(s, defs).
acDefsOk maps acDefOk(*, list(*))
: scope * AccessControlDefinition
acDefOk(_,_) :- false | error $[This access control definition is not yet supported].
rules // securitycontext and principal
defOk(s, AccessControlPrincipalDef(ent, properties)) :- principalDefOk(s, ent, properties).
acDefOk(s, AccessControlPrincipalAcDef(ent, properties)) :- principalDefOk(s, ent, properties).
: scope * string * list(string)
principalDefOk(, , ) :- { entityName }
// TO-DO: only give principal access to the credential properties instead of all
definedTypeCustomError(s, ent) == t@ENTITY(entityName, s_ent) | error $[Entity [ent] does not exist, and cannot be used as principal for access control], // correct error message for tests
principalPropertyTypes(s_ent, properties, ent) == credentialTypes,
compatibleCredentialTypes(properties, credentialTypes),
declSecurityContext(s, t, credentialTypes).
compatibleCredentialTypes maps compatibleCredentialType(list(*), list(*))
: string * TYPE
compatibleCredentialType(x, s) :-
isStringCompatibleType(s) | error $[Credential types should be compatible with String type] @x.
: scope * TYPE * list(TYPE)
declSecurityContext(, principalType, credentialTypes) :- { }
new s_extend_security_context,
declProperty(s_extend_security_context, "securityContext", "principal", principalType),
declProperty(s_extend_security_context, "securityContext", "loggedIn", bool(s)),
declareCredentials(s_extend_security_context, credentialTypes),
declareExtendScope(s, "securityContext", s_extend_security_context),
extendScopes(resolveExtendScope(s, "securityContext"), s_extend_security_context).
: scope * list(TYPE)
declareCredentials(s, ts) :- !var["_credentials", withType(CREDENTIALS(ts))] in s.
rules // access control rules
acDefOk(s, Rule(r)) :- acRuleOk(s, r).
: scope * AccessControlRule
acRuleOk(_, _) :- try { false } | warning $[This access control rule is not yet implemented].
acRuleOk(, AccessControlRule(t, , mas@MatchArgs(, _), , nested)) :- { }
acRuleSignatureOk(s, t, x, mas),
bool == bool(s),
new s_rule, s_rule -F-> s,
argTypes == typesOfArgs(s, args),
declareParameters(s_rule, zipArgTypes(args, argTypes)),
principalType == principalType(s) | error $[Cannot have access control rules without a principal declaration] @x, // correct error message for tests
declareVar(s_rule, "principal", principalType),
declareVar(s_rule, "loggedIn", bool),
nestedAcRulesOk(s_rule, nested),
equalType(typeOfExp(s_rule, exp), bool) | error $[Rule should contain a Bool expression] @exp. // correct error message for tests
acRuleOk(, SpecialAccessControlRule()) :- { }
bool == bool(s),
new s_rule, s_rule -F-> s,
principalType == principalType(s) | error $[Cannot have access control rules without a principal declaration], // correct error message for tests
declareVar(s_rule, "principal", principalType),
declareVar(s_rule, "loggedIn", bool),
equalType(typeOfExp(s_rule, exp), bool) | error $[Rule should contain a Bool expression] @exp. // correct error message for tests
maps nestedAcRuleOk(*, list(*))
: scope * AccessControlRule
nestedAcRuleOk(_, _) :- false | error $[Nested rule type unknown, nested rules must be of type "action"]. // correct error message for tests
nestedAcRuleOk(_, AccessControlRule(t, _, _, _, _)) :- false | error $[Nested rule type unknown, nested rules must be of type "action"] @t. // correct error message for tests
nestedAcRuleOk(, AccessControlRule(ACTypeAction(), x, MatchArgs(, _), , nested)) :- { }
new s_rule, s_rule -P-> s, // P label here instead of F to correctly resolve and error on variable usage
argTypes == typesOfArgs(s, args),
declareParameters(s_rule, zipArgTypes(args, argTypes)),
nestedAcRulesOk(s_rule, nested),
equalType(typeOfExp(s_rule, exp), bool(s)) | error $[Rule should contain a Bool expression] @exp. // correct error message for tests
nestedAcRuleOk(, SpecialAccessControlRule()) :- { }
new s_rule, s_rule -P-> s,
equalType(typeOfExp(s_rule, exp), bool(s)) | error $[Rule should contain a Bool expression] @exp. // correct error message for tests
: scope * AccessControlType * MatchName * OptMatchArgs
acRuleSignatureOk(_, _, m, _) :- try { false } | warning $[This access control signature is not checked yet] @m.
// a wildcard in the name is always ok
acRuleSignatureOk(_, _, MatchNameWildCard(), _).
acRuleSignatureOk(_, _, MatchName(_, WildCardArg()), _).
acRuleSignatureOk(s, ACTypePage(), MatchName(, OptWildCardArgNone()), MatchArgs(_, WildCardArg())) :-
pageType(s, p) == PAGE(_, _) | error $[Page rule refers to non-existing page [p]] @p. // correct error message for tests
acRuleSignatureOk(, ACTypePage(), MatchName(, OptWildCardArgNone()), MatchArgs(, OptWildCardArgNone())) :- { }
pageType(s, p) == PAGE(_, sigTypes) | error $[Page rule refers to non-existing page [p]] @p, // correct error message for tests
typesOfArgs(s, args) == argTypes,
argTypes == sigTypes | error $[Argument types [argTypes] are not equal to the page signature types [sigTypes]] @args.
acRuleSignatureOk(_, ACTypeAction(), _, _).
acRuleSignatureOk(s, ACTypeTemplate(), MatchName(, OptWildCardArgNone()), MatchArgs(_, WildCardArg())) :-
resolveTemplateNoAjax(s, t) == [_ | _] | error $[Template rule refers to non-existing template [t]. For ajax templates, use 'rule ajaxtemplate'] @t. // correct error message for tests
acRuleSignatureOk(, ACTypeTemplate(), MatchName(, OptWildCardArgNone()), MatchArgs(, OptWildCardArgNone())) :- { }
argTypes == typesOfArgs(s, args),
queryResult@[_ | _] == resolveTemplateNoAjax(s, t) | error $[Template rule refers to non-existing template [t]. For ajax templates, use 'rule ajaxtemplate'] @t, // correct error message for tests
ts == queryResultTypes(queryResult),
acRuleSignatureArgsMatching(argTypes, ts) | error $[Template rule refers to non-existing template [t] with argument types [argTypes]] @args. // correct error message for tests
acRuleSignatureOk(s, ACTypeAjaxTemplate(), MatchName(, OptWildCardArgNone()), MatchArgs(_, WildCardArg())) :-
resolveAjaxTemplate(s, t) == [_ | _] | error $[Ajax template rule refers to non-existing template [t]. For non-ajax templates, use 'rule template'] @t. // correct error message for tests
acRuleSignatureOk(, ACTypeAjaxTemplate(), MatchName(, OptWildCardArgNone()), MatchArgs(, OptWildCardArgNone())) :- { }
argTypes == typesOfArgs(s, args),
queryResult@[_ | _] == resolveAjaxTemplate(s, t) | error $[Template rule refers to non-existing template [t]. For non-ajax templates, use 'rule template'] @t, // correct error message for tests
ts == queryResultTypes(queryResult),
acRuleSignatureArgsMatching(argTypes, ts) | error $[Template rule refers to non-existing template [t] with argument types [argTypes]] @args. // correct error message for tests
acRuleSignatureOk(s, ACTypePointcut(), MatchName(, OptWildCardArgNone()), MatchArgs(_, WildCardArg())) :-
resolvePointcut(s, p) == [_ | _] | error $[pointcut [p] does not exist] @p. // correct error message for tests
acRuleSignatureOk(, ACTypePointcut(), MatchName(, OptWildCardArgNone()), MatchArgs(, OptWildCardArgNone())) :- { }
argTypes == typesOfArgs(s, args),
queryResult@[_ | _] == resolvePointcut(s, p) | error $[pointcut [p] does not exist] @p, // correct error message for tests
ts == queryResultTypes(queryResult),
acRuleSignatureArgsMatching(argTypes, ts) | error $[Pointcut rule refers to non-existing pointcut [p] with argumnent types [argTypes]] @args. // correct error message for tests
: list(TYPE) * list(TYPE)
acRuleSignatureArgsMatching(_, []) :- false.
acRuleSignatureArgsMatching(args, [TEMPLATE(_, args, _) | _]).
acRuleSignatureArgsMatching(args, [POINTCUT(_, args) | _]).
acRuleSignatureArgsMatching(args, [_ | ts]) :- acRuleSignatureArgsMatching(args, ts).
rules // predicates
defOk(s, Predicate(p, args, exp)) :- predicateOk(s, p, args, exp, TRUE()).
acDefOk(s, PredicateAc(p, args, exp)) :- predicateOk(s, p, args, exp, TRUE()).
declEntityBodyDeclaration(s, _, PredicateInEntity(p, args, exp)) :- predicateOk(s, p, args, exp, FALSE()).
// last bool denotes if predicate is declared in global scope
: scope * string * OptFormalArgs * Exp * BOOL
predicateOk(, , FormalArgs(), , global) :- { }
bool == bool(s),
new s_predicate, s_predicate -F-> s,
argTypes == typesOfArgs(s, args),
declareParameters(s_predicate, zipArgTypes(args, argTypes)),
principalType == principalType(s) | error $[Cannot have access control rules without a principal declaration] @p, // correct error message for tests
declareVar(s_predicate, "principal", principalType),
declareVar(s_predicate, "loggedIn", bool),
equalType(typeOfExp(s_predicate, exp), bool) | error $[Predicate should contain a Bool expression] @exp, // correct error message for tests
declPredicate(s, p, FUNCTION_ORIGIN(args), argTypes, bool, global).
// last bool arg denotes if the scope is global
: scope * string * ORIGIN * list(TYPE) * TYPE * BOOL
declPredicate(s, p, origin, argTypes, return, TRUE()) :- declFunctionGlobal(s, p, origin, argTypes, return).
declPredicate(s, p, origin, argTypes, return, FALSE()) :- declFunctionEntity(s, p, origin, argTypes, return, FALSE()).
rules // pointcuts
acDefOk(, AccessControlPointcut(p, , elems)) :- { }
ts == typesOfArgs(s, fargs),
declarePointcut(s, p, ts),
new s_pointcut,
declareParameters(s_pointcut, zipArgTypes(fargs, ts)),
acPointcutElemsOk(s, s_pointcut, argNames(fargs), ts, elems).
acPointcutElemsOk maps acPointcutElemOk(*, *, *, *, list(*))
: scope * scope * list(string) * list(TYPE) * AccessControlPointcutElement
acPointcutElemOk(s, s_pointcut, pointcutArgNames, ts, @AccessControlPointcutElement(_, _, args, _)) :-
acPointcutElementDefined(s, s_pointcut, elem),
pointcutArgsUsed(pointcutArgNames, args, elem).
// sameElements(pointcutArgNames, args) | error $[Pointcut element must use all pointcut arguments: [pointcutArgNames]] @elem.
: scope * scope * AccessControlPointcutElement
acPointcutElementDefined(_, _, AccessControlPointcutElement(_, MatchName(p, WildCardArg()), _, _)).
acPointcutElementDefined(_, _, AccessControlPointcutElement(t, _, _, _)) :-
false | error $[Only pages, templates, ajaxtemplates and actions are supported in pointcuts] @t.
acPointcutElementDefined(s, s_pointcut, elem@AccessControlPointcutElement(ACTypePage(), MatchName(, _), args, optWc)) :- { }
argTypes == typesOfPointcutIdentifiers(s_pointcut, args),
resolvePage(s, p) == [(_, (_, PAGE(_, ts)))] | error $[Page rule refers to non-existing page [p]] @p, // correct error message for tests
acPointcutElementArgsCompatible(argTypes, ts, optWc) | error $[Incompatible argument types for page [p]] @elem.
acPointcutElementDefined(s, s_pointcut, elem@AccessControlPointcutElement(ACTypeTemplate(), MatchName(, _), args, optWc)) :- { }
argTypes == typesOfPointcutIdentifiers(s_pointcut, args),
resolveTemplateNoAjax(s, t) == [(_, (_, TEMPLATE(_, ts, _)))] | error $[Template rule refers to non-existing template [t]] @t, // correct error message for tests
acPointcutElementArgsCompatible(argTypes, ts, optWc) | error $[Template rule refers to non-existing template [t] for the given argument types] @elem. // correct error message for tests
acPointcutElementDefined(s, s_pointcut, elem@AccessControlPointcutElement(ACTypeAjaxTemplate(), MatchName(, _), args, optWc)) :- { }
argTypes == typesOfPointcutIdentifiers(s_pointcut, args),
resolveAjaxTemplate(s, t) == [(_, (_, TEMPLATE(_, ts, _)))] | error $[Ajax template rule refers to non-existing template [t]] @t, // correct error message for tests
acPointcutElementArgsCompatible(argTypes, ts, optWc) | error $[Ajax template rule refers to non-existing template [t] for the given argument types] @elem. // correct error message for tests
acPointcutElementDefined(_, _, elem@AccessControlPointcutElement(ACTypeAction(), _, _, _)).
: list(TYPE) * list(TYPE) * OptWildCardArg
acPointcutElementArgsCompatible([], [], _).
acPointcutElementArgsCompatible([], [_ | _], WildCardArg()).
acPointcutElementArgsCompatible([], [_ | _], OptWildCardArgNone()) :- false.
acPointcutElementArgsCompatible([_ | _], [], _) :- false.
acPointcutElementArgsCompatible([t1 | t1s], [t2 | t2s], optWc) :-
typeCompatible(t1, t2),
acPointcutElementArgsCompatible(t1s, t2s, optWc).
rules // utils
principalPropertyTypes maps principalPropertyType(*, list(*), *) = list(*)
: scope * string * string -> TYPE
principalPropertyType(s, , ent) = t :-
t == propertyType(s, x) | error $[[x] is not a property of entity [ent]]. // correct error message for tests
principalPropertyType(s, @"name", ent) = t :-
t == propertyType(s, x) | error $[Principal credential type [ent] does not have a [x] property, a property with [x] annotation is not sufficient for use as credential]. // correct error message for tests
: scope
principalDefined(s) :- { t }
principalType(s) == t | error $[Principal is not defined].
: scope -> TYPE
principalType(s) = t :- { }
resolveType(s, "securityContext") == [(_, (_, ENTITY(_, s_securityContext)))] | error $[securityContext not defined],
resolveProperty(s_securityContext, "principal") == [(_, (_, t))]. // no fixed error message here to allow more specific error messages on higher predicates
: scope -> list(TYPE)
credentialTypes(s) = ts :- { }
resolveType(s, "securityContext") == [(_, (_, ENTITY(_, s_securityContext)))] | error $[securityContext not defined],
queryResultTypes(resolveProperty(s_securityContext, "_credentials")) == result,
result == [CREDENTIALS(ts) | _] | error $[No credentials have been defined].
maps typesOfPointcutIdentifier(*, list(*)) = list(*)
: scope * string -> TYPE
typesOfPointcutIdentifier(s, ) = t :-
resolveVar(s, x) == [(_, (_, t))] | error $[Pointcut element uses unknown identifier [x]]. // correct error message for tests
pointcutArgsUsed maps pointcutArgUsed(list(*), *, *)
: string * list(string) * AccessControlPointcutElement
pointcutArgUsed(x, [], loc) :- false | error $[Pointcut element must use pointcut argument [x]] @loc. // correct error message for tests
pointcutArgUsed(x, [x | _], _).
pointcutArgUsed(x, [_ | ys], loc) :- pointcutArgUsed(x, ys, loc).
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