com.jcraft.jsch

Interface Signature

All Known Subinterfaces:

SignatureDSA, SignatureECDSA, SignatureRSA

public interface Signature

Usually not to be used by applications. A generic signature algorithm, with key and some state of an ongoing signing or verification algorithm. (Methods for providing the key are given in the subinterfaces SignatureDSA, SignatureECDSA, SignatureRSA, which also have some more documentation.)

Since:

0.1.49

Method Summary

Modifier and Type	Method and Description
void	init() Initializes the signature object.
byte[]	sign() Signs the data given so far to the update(byte[]) method.
void	update(byte[] H) adds some more data to be signed/verified.
boolean	verify(byte[] sig) Verifies that the given signature is a correct signature.

Method Detail

init

void init()
   throws Exception

Initializes the signature object. (This can only do initialization which do not depend on whether signing or checking is done.)

Throws:

Exception

update

void update(byte[] H)
     throws Exception

adds some more data to be signed/verified.

Parameters:

H - the array containing the data to be signed/verified.

Throws:

Exception

verify

boolean verify(byte[] sig)
        throws Exception

Verifies that the given signature is a correct signature.

Parameters:

sig - an array containing the signature for the data given by update(byte[]).

Returns:

true if the signature is correct, false if the signature is not correct.

Throws:

Exception

sign

byte[] sign()
     throws Exception

Signs the data given so far to the update(byte[]) method.

Returns:

a signature for the data.

Throws:

Exception