qr code generator with logo javascript Part IV: Applied Security for Oracle APEX and Oracle Business Intelligence in Java

Make QR Code in Java Part IV: Applied Security for Oracle APEX and Oracle Business Intelligence

Part IV: Applied Security for Oracle APEX and Oracle Business Intelligence
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Notice that row-wise initialization is not used here because the query is expected to return a single value In this case, the value of the USER session variable is returned and the variable target section of the initialization block is used to specify that the result of the query be assigned to the USER session variable The other important thing to notice about this query is the use of NQS_PASSWORD_CLAUSE To help you understand why this is important, you need to understand the notion of proxy authentication You can log onto the BI server as one user and tell the BI server to run everything as another user This technique is used in SSO and is discussed later in the chapter Oracle BI also uses this feature for interprocess communication For example, if the scheduler service needs to run a scheduled job for a user called BIUSER, it will log onto the BI server as the user Administrator and tell the BI server to run everything as BIUSER Oracle BI Publisher also uses proxy authentication when communicating with the BI server When the BI server gets a proxy authentication request, it first authenticates the proxy user, Administrator in this example Then it runs all the initialization blocks for the target user, BIUSER in this example This is exactly what you want to happen, because then you know that BIUSER s session is properly set up The only problem with this is that the scheduler service does not know BIUSER s password The authentication initialization block would fail, then, because it requires both the username and password to be correct NQS_PASSWORD_CLAUSE fixes this problem When the BI server is performing a proxy authentication, it strips the NQS_PASSWORD_CLAUSE out of the authentication initialization block
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LDAP Authentication The Oracle BI documentation mentions two ways that an LDAP server
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can be used It discusses importing LDAP users and groups into Oracle BI and using LDAP as an external authentication method The import capability is really just a quick way to load users into the RPD and actually uses internal authentication This should be used only for testing purposes and should not be confused with LDAP authentication If you already have an LDAP set up, you should not import the users from LDAP, but use the LDAP server as an external authentication method instead As with external table authentication, two basic steps are required to perform LDAP authentication, as shown in the next illustration First, the BI server must verify that the user s password is correct Then it assigns a value to the USER session variable
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When setting up LDAP authentication, you first define an LDAP server in your BI server metadata, the RPD This is done in the Security Manager of the Administration tool Figure 13-4 shows the process of setting up an LDAP server
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FIGURE 13-4
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LDAP server setup
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If your LDAP server accepts anonymous binds, you can leave the Bind DN and Bind Password fields blank On the Advanced tab is an option to use SSL connections to the LDAP server Use of SSL is highly recommended, as passwords are passed over the network in plaintext when using LDAP authentication Next, create an initialization block to populate the USER session variable This initialization block will perform the LDAP bind to test the validity of the username and password and can return any LDAP attribute At a minimum, the username (uid) needs to be returned and placed in the USER session variable Figure 13-5 shows a completed initialization block for LDAP authentication At this point, you could try logging into Oracle BI using your LDAP credentials It is important that you remember that authorization still needs to be set up (and is covered in the appropriate section a bit later in the chapter)
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