net.java.sip.communicator.impl.protocol.sip.security
Class MessageDigestAlgorithm

java.lang.Object
  net.java.sip.communicator.impl.protocol.sip.security.MessageDigestAlgorithm

public class MessageDigestAlgorithm
extends Object

The class takes standard Http Authentication details and returns a response according to the MD5 algorithm

Author:

Emil Ivov

Constructor Summary

MessageDigestAlgorithm()

Method Summary

(package private) static String

calculateResponse(String algorithm, String username_value, String realm_value, String passwd, String nonce_value, String nc_value, String cnonce_value, String method, String digest_uri_value, String entity_body, String qop_value) Calculates an http authentication response in accordance with rfc2617.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MessageDigestAlgorithm

public MessageDigestAlgorithm()

Method Detail

calculateResponse

static String calculateResponse(String algorithm,
                                String username_value,
                                String realm_value,
                                String passwd,
                                String nonce_value,
                                String nc_value,
                                String cnonce_value,
                                String method,
                                String digest_uri_value,
                                String entity_body,
                                String qop_value)

Calculates an http authentication response in accordance with rfc2617.

Parameters:

algorithm - a string indicating a pair of algorithms (MD5 (default), or MD5-sess) used to produce the digest and a checksum.

username_value - username_value (see rfc2617)

realm_value - A string that has been displayed to the user in order to determine the context of the username and password to use.

passwd - the password to encode in the challenge response.

nonce_value - A server-specified data string provided in the challenge.

cnonce_value - an optional client-chosen value whose purpose is to foil chosen plaintext attacks.

method - the SIP method of the request being challenged.

digest_uri_value - the value of the "uri" directive on the Authorization header in the request.

entity_body - the entity-body

qop_value - Indicates what "quality of protection" the client has applied to the message.

nc_value - the hexadecimal count of the number of requests (including the current request) that the client has sent with the nonce value in this request.

Returns:

a digest response as defined in rfc2617

Throws:

NullPointerException - in case of incorrectly null parameters.