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TIBCO GridServer® 7.1.0

# Using LDAP Authentication and Authorization

LDAP can be used for authentication, where a user is authenticated against a directory entry; authorization, where groups assigned to that user map to GridServer roles; or both authentication and authorization. For example, you can use Kerberos for authentication, but assign roles with LDAP. Or you might wish to use LDAP for authentication, but assign roles manually.

There are two authentication modes in LDAP. The Bind Mode authenticates a user using an LDAP bind operation (login) to the LDAP server. If the operation succeeds, the user is authenticated. In Comparison Mode, when a user logs in, the credentials of the user are retrieved from the LDAP server and compared to the credentials submitted in the login request. If the credentials match, the authentication is successful. Otherwise, authentication fails. In general, a hashed password is used for comparison.

Note that you do not set Bind Mode or Comparison Mode explicitly. The mode is set implicitly according to User Password Attribute: if User Password Attribute is set to any value, the authenticator uses Comparison Mode, if User Password Attribute is blank, Bind Mode is used.

If you are using LDAP for authentication, you must configure a user lookup. The User DN Format allows you to specify the user with a single parameter substitution in the DN. This is the preferred method, since it requires no LDAP search. If your directory is not configured such that you can specify this, then use the User Search Base and parameterized User Search String Format. In this case, the User Search Base specifies where to start the search (to optimize it) and the User Search String Format specifies how to match the entry by attribute.

If you are using LDAP for authorization, you must specify how the user’s groups are located. If the groups are set as attributes of the user entry, use the User Group Attribute setting. Otherwise, you must use the Group Search Configuration settings.

When the group is retrieved, any role that has the Group setting set to one of these groups is assigned to the user. You can also assign groups manually, with the Admin > User Admin> User Admin page, instead of or in addition to assigning with LDAP.

Parameters are specified to the LDAP search using the standard format `{``n``}`, where `n` is the `n`th parameter. In this case, the user name is the only parameter ever used, so use `{0}` to indicate user name.

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