KasperskyOS Community Edition 1.1
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Developing security policies  >  Describing a security policy for a KasperskyOS-based solution  >  KasperskyOS Security models  >  HashSet security model  >  HashSet security model contains expression
HashSet security model contains expression

contains {sid : <Sid>, entry : <Entry>}

It checks whether the entry value is in the table associated with the sid resource.

It returns a value of the Boolean type. If the entry value is in the table associated with the sid resource, it returns true. Otherwise it returns false.

It runs incorrectly in the following cases:

  • The sid resource is not associated with a table from the tables pool of the HashSet security model object being used.
  • The sid value is outside of the permissible range.

When the expression runs incorrectly, the Kaspersky Security Module returns the "denied" decision.

Example:

/* A process of the Server class will receive the "allowed" decision from

* the Kaspersky Security Module by calling the

* Check security interface method if the value 42 is in the table

* associated with this process. Otherwise a process of the

* Server class will receive the "denied" decision from the security module

/* by calling the Check security interface method. */

security src=Server, method=Check {

assert(S.contains {sid : src_sid, entry : 42})

}

Article ID: ssp_descr_security_models_hashset_contains, Last review: Aug 2, 2023
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