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SQL Anywhere 12.0.1 » MobiLink - Client Administration » Introduction to MobiLink clients » MobiLink users


Custom user authentication

You can choose to use a user authentication mechanism other than the built-in MobiLink mechanism. The following are some reasons for using a custom user authentication mechanism:

  • To include integration with existing database user authentication schemes or external authentication mechanisms.

  • To supply custom features, such as minimum password length or password expiry, that do not exist in the built-in MobiLink mechanism.

There are three custom authentication tools:

  • mlsrv12 -zu+ option

  • authenticate_user script or authenticate_user_hashed script

  • authenticate_parameters script

The mlsrv12 -zu+ option allows you to control the automatic addition of users. For example, specify -zu+ to have all unrecognized MobiLink user names added to the ml_user table when they first synchronize. The -zu+ option is only needed for built-in MobiLink authentication.

The authenticate_user, authenticate_user_hashed, and authenticate_parameters scripts override the default MobiLink user authentication mechanism. Any user who successfully authenticates is automatically added to the ml_user table.

You can use the authenticate_user script to create custom authentication of user IDs and passwords. If this script exists, it is executed instead of the built-in password comparison. The script must return error codes to indicate the success or failure of the authentication.

There are several predefined scripts for the authenticate_user event that are installed with MobiLink. These make it easier for you to authenticate using LDAP, POP3, and IMAP servers. See Authentication to external servers.

Use authenticate_parameters to create custom authentication that depends on values other than user IDs and passwords.

 See also

Java and .NET user authentication
Authentication to external servers