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7: Applied Database Vault for Existing Applications
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Once this configuration is complete, we can immediately leverage externally defined users in the organization as our realm administrators A key point to this capability is that the membership in the EUS enterprise role SH_DATA_ADMIN_ENTERPRISE, a directory groupOfUniqueNames object, is also controlled externally and can be leveraged in more than just a single database in the organization For example, if we log in as the EUS user JOE, we can see that his database session roles and privileges reflect being the Sales History application data administrator
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sam_sec_mgr@aos>CONNECT joe Enter password: Connected global_oid_tree1@aos>SELECT SYS_CONTEXT('USERENV','EXTERNAL_NAME') FROM dual; SYS_CONTEXT('USERENV','EXTERNAL_NAME') --------------------------------------cn=joe,cn=users,dc=us,dc=oracle,dc=com 1 row selected
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global_oid_tree1@aos>-- show the session roles that include global_oid_tree1@aos>-- the SH_DATA_ADMIN_0101 role
Part II:
Oracle Database Vault
global_oid_tree1@aos>SELECT * FROM session_roles ORDER BY 1; ROLE -----------------------------BASE_DATA_ADMIN_0101 DV_PUBLIC SH_DATA_ADMIN_0101 SH_DATA_ADMIN_GLOBAL 4 rows selected global_oid_tree1@aos>-- show the session privileges global_oid_tree1@aos>-- that include privileges like AUDIT ANY (object) global_oid_tree1@aos>SELECT * FROM session_privs ORDER BY 1; PRIVILEGE ---------------------------------------CREATE SESSION DELETE ANY TABLE EXECUTE ANY INDEXTYPE EXECUTE ANY OPERATOR EXECUTE ANY PROCEDURE EXECUTE ANY TYPE INSERT ANY TABLE SELECT ANY SEQUENCE SELECT ANY TABLE UPDATE ANY TABLE 10 rows selected global_oid_tree1@aos>-- attempt to use the SELECT ANY privilege global_oid_tree1@aos>-- on a table that is protected by the global_oid_tree1@aos>-- Sales History realm global_oid_tree1@aos> SELECT cust_last_name , cust_year_of_birth , cust_marital_status , cust_income_level FROM shcustomers WHERE cust_state_province = 'TX' AND ROWNUM < 10 ORDER BY cust_last_name; CUST_LAST_ CUST_YEAR_OF_BIRTH CUST_MARIT CUST_INCOME_LEVEL ---------- ------------------ ---------- ------------------------Beiers 1982 single K: 250,000 - 299,999 Duval 1981 single H: 150,000 - 169,999 Greeley 1977 F: 110,000 - 129,999 Grover 1970 married D: 70,000 - 89,999 Hamilton 1961 single G: 130,000 - 149,999 Krider 1967 F: 110,000 - 129,999 Majors 1948 single G: 130,000 - 149,999 Rowley 1969 single H: 150,000 - 169,999 Stone 1978 single I: 170,000 - 189,999 9 rows selected global_oid_tree1@aos>-- attempt to use the SELECT ANY privilege
7: Applied Database Vault for Existing Applications
global_oid_tree1@aos>-- on a table that is protected by the global_oid_tree1@aos>-- Order Entry realm global_oid_tree1@aos>SELECT cust_last_name, date_of_birth, marital_status, income_level FROM oecustomers; FROM oecustomers * ERROR at line 2: ORA-01031: insufficient privileges
With Oracle technologies such as Oracle Identity Manager, which is covered in 9, we could configure self-service workflows that allow a directory user such as JOE to remove himself temporarily from the application data administrator responsibility The self-service workflow could allow JOE to delegate this function to another directory user OIM can be configured to update the members of the SH_DATA_ADMIN_ENTERPRISE groupOfUniqueNames object with this information so that delegation of realm administration can be achieved The use of the Oracle Virtual Directory (OVD) will even also allow us to extend the backend directory store for EUS users shown in this example to the Active Directory and Sun Java System Directory Server products Refer to the OVD home page on the Oracle Technology Network (OTN) at wwworaclecom/technology/products/id_ mgmt/ovds/indexhtml for more details on this type of integration We can extend the EUS example we ve just presented with user identity attributes in a DBV rule set that controls the DBV realm authorization for the SH_DATA_ADMIN_0101 role In 6 we introduced the user identity attributes that are exposed in the EUS session context s SYS_LDAP_USER_DEFAULT namespace Consider the case where JOE is a permanent employee and SALLY is a contractor This fact can be stored in the identity attribute employeeType that is part of the inetOrgPerson directory object as shown in Figure 7-4 Business rules in the organization may dictate that contractors cannot delete financial data in systems such as the Sales History application We can define a DBV rule set that leverages the employeeType attribute and the type of SQL command issued as follows:
diego_dbvmgr@aos>-- create the rule to check for the DELETE diego_dbvmgr@aos>-- commands and the employeeType attribute diego_dbvmgr@aos>-- of PERMANENT, or DBA for non-EUS users diego_dbvmgr@aos>BEGIN dbms_macadmcreate_rule( rule_name => 'DELETE By Permanent Employee Only' , rule_expr =>'(INSTR(DVSYSDV_SQL_TEXT,''DELETE'') = 1 AND ' || 'NVL(SYS_CONTEXT(''SYS_LDAP_USER_DEFAULT'',''EMPLOYEETYPE''),''DBA'')' || ' IN (''PERMANENT'',''DBA''))' || ' OR (INSTR(DVSYSDV_SQL_TEXT,''DELETE'') = 0)' ); END; / PL/SQL procedure successfully completed diego_dbvmgr@aos>-- create the rule set and add this rule diego_dbvmgr@aos>BEGIN dbms_macadmcreate_rule_set( rule_set_name =>'Sales History Data Administration Allowed',
Part II:
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