Suresh1234,
First, welcome to wmusers and please register on the site.
Most systems do not pass the passwords along in the header. Once the user is authenticated, a token is passed that can be used to verify the user for each application by creating a method to verify against the authentication system. Netegrity works this way. Once a user has authenticated, I only need to grab the unique token from the header, pass it to netegrity for verification that the user is authenticated.
On a separate note, applications usually handle permissioning and provisioning but use the token along with the single sign on unique id to determine if the action is permissable.
Also, some LDAP systems will store static information like ROLE and will return this information during the intial logon. The role attribute can be used to determine if an action is allowed. It depends on the security of each system and your enterprise policy.
But to answer your original question, YES. If you want to send user name and password, you can do so, but it is inadvisable for security reasons.
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