Consuming SOAP based web services from Drupal (How to pass unencrypted user password)

I need to call the following functions on some other portal through web service (SOAP). This functions will be called whenever a user is created/updated, change password, enroll for a course.

Following Method needs to be called.

CreateUser():

Parameters: FirstName,LoginName,Password,Email

UpdateUser():

Parameters: UserID,LoginName,FirstName,Password,ConfirmPassword,Email

My questions? 1. How do I pass unecrypted user password on event like user registration 2. Is there any module that will help me consume(call) SOAP based web services using Rules Module. Basically the moment a new user is registered or password is change these web services will be called to create or update the user on t开发者_运维问答hird party non-drupal based site.