Package com.ongres.scram.common.message

Class ServerFirstMessage

java.lang.Object

com.ongres.scram.common.message.ServerFirstMessage

All Implemented Interfaces:

StringWritable

public class ServerFirstMessage
extends Object
implements StringWritable

Constructs and parses server-first-messages. Formal syntax is: server-first-message = [reserved-mext ","] nonce "," salt "," iteration-count ["," extensions] Note that extensions are not supported.

See Also:

• [RFC5802] Section 7

Field Summary

Fields

Modifier and Type	Field	Description
private final String	clientNonce
private final int	iteration
static final int	ITERATION_MIN_VALUE	Minimum allowed value for the iteration, as per the RFC.
private final String	salt
private final String	serverNonce

Constructor Summary

Constructors

Constructor	Description
ServerFirstMessage(String clientNonce, String serverNonce, String salt, int iteration)	Constructs a server-first-message from a client-first-message and the additional required data.

Method Summary

Modifier and Type	Method	Description
String	getClientNonce()
int	getIteration()
String	getNonce()
String	getSalt()
String	getServerNonce()
static ServerFirstMessage	parseFrom(String serverFirstMessage, String clientNonce)	Parses a server-first-message from a String.
String	toString()
StringBuffer	writeTo(StringBuffer sb)	Write the class information to the given StringBuffer.

Methods inherited from class java.lang.Object

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

Field Details

ITERATION_MIN_VALUE

public static final int ITERATION_MIN_VALUE

Minimum allowed value for the iteration, as per the RFC.

See Also:

• Constant Field Values

clientNonce

private final String clientNonce

serverNonce

private final String serverNonce

salt

private final String salt

iteration

private final int iteration

Constructor Details

ServerFirstMessage

public ServerFirstMessage(String clientNonce,
 String serverNonce,
 String salt,
 int iteration)
                   throws IllegalArgumentException

Constructs a server-first-message from a client-first-message and the additional required data.

Parameters:

clientNonce - String representing the client-first-message

serverNonce - Server serverNonce

salt - The salt

iteration - The iteration count (must be <= 4096)

Throws:

IllegalArgumentException - If clientFirstMessage, serverNonce or salt are null or empty, or iteration < 4096

Method Details

getClientNonce

public String getClientNonce()

getServerNonce

public String getServerNonce()

getNonce

public String getNonce()

getSalt

public String getSalt()

getIteration

public int getIteration()

writeTo

public StringBuffer writeTo(StringBuffer sb)

Description copied from interface: StringWritable

Write the class information to the given StringBuffer.

Specified by:

writeTo in interface StringWritable

Parameters:

sb - Where to write the data.

Returns:

The same StringBuffer.

parseFrom

public static ServerFirstMessage parseFrom(String serverFirstMessage,
 String clientNonce)
                                    throws ScramParseException,
IllegalArgumentException

Parses a server-first-message from a String.

Parameters:

serverFirstMessage - The string representing the server-first-message

clientNonce - The serverNonce that is present in the client-first-message

Returns:

The parsed instance

Throws:

ScramParseException - If the argument is not a valid server-first-message

IllegalArgumentException - If either argument is empty or serverFirstMessage is not a valid message

toString

public String toString()

Overrides:

toString in class Object