/*******************************************************************************
* Product of NIST/ITL Advanced Networking Technologies Division (ANTD).        *
* See ../../../../doc/uncopyright.html for conditions of use.                  *
* Author: M. Ranganathan (mranga@nist.gov)                                     *
* Modified By:  O. Deruelle (deruelle@nist.gov)                                *                                                                                  
* Questions/Comments: nist-sip-dev@antd.nist.gov                               *
*******************************************************************************/
package gov.nist.sip.sipheaders;
import gov.nist.sip.*;

/**
* WWW Authenticate SIP (HTTP ) header.
*<pre>
*
* Proxy-Authenticate  = "Proxy-Authenticate" ":" 1#challenge
*
* HTTP RFC 2616 
*</pre>
*/
public class ProxyAuthenticate extends SIPHeader {
    
    /** challenge field
     */
    protected Challenge challenge;
    
    /** Constructor
     * @param ch Challenge to set
     */
    public ProxyAuthenticate( Challenge ch) {
        super(PROXY_AUTHENTICATE);
        challenge = ch;
    }
    
        /**
         * Encode in canonical form.
         * @return String
         */
    public String encode() {
        return headerName + COLON + SP + challenge.encode() + NEWLINE;
    }
        
        /** get the challenge
         * @return challenge
         */        
        public Challenge getChallenge() {
            return challenge;
        }
        
}