net.schmizz.sshj.signature

Class AbstractSignature

java.lang.Object

net.schmizz.sshj.signature.AbstractSignature

All Implemented Interfaces:

Signature

Direct Known Subclasses:

SignatureDSA, SignatureECDSA, SignatureEdDSA, SignatureRSA

public abstract class AbstractSignature
extends java.lang.Object
implements Signature

An abstract class for Signature that implements common functionality.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.security.Signature	signature

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSignature(java.security.Signature signatureEngine)
protected	AbstractSignature(java.lang.String algorithm)

Method Summary

Modifier and Type	Method and Description
protected byte[]	extractSig(byte[] sig, java.lang.String expectedKeyAlgorithm) Check whether the signature is generated using the expected algorithm, and if so, return the signature blob
void	initSign(java.security.PrivateKey privateKey) Initialize this signature with the given private key for signing.
void	initVerify(java.security.PublicKey publicKey) Initialize this signature with the given public key for signature verification.
byte[]	sign() Compute the signature.
void	update(byte[] foo) Convenience method, same as calling Signature.update(byte[], int, int) with offset as 0 and H.length.
void	update(byte[] foo, int off, int len) Update the computed signature with the given data.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.schmizz.sshj.signature.Signature

encode, verify

Field Detail

signature

protected final java.security.Signature signature

Constructor Detail

AbstractSignature

protected AbstractSignature(java.lang.String algorithm)

AbstractSignature

protected AbstractSignature(java.security.Signature signatureEngine)

Method Detail

initVerify

public void initVerify(java.security.PublicKey publicKey)

Description copied from interface: Signature

Initialize this signature with the given public key for signature verification. Note that subsequent calls to either Signature.initVerify(PublicKey) or Signature.initSign(PrivateKey) will overwrite prior initialization.

Specified by:

initVerify in interface Signature

Parameters:

publicKey - the public key to use for signature verification

initSign

public void initSign(java.security.PrivateKey privateKey)

Description copied from interface: Signature

Initialize this signature with the given private key for signing. Note that subsequent calls to either Signature.initVerify(PublicKey) or Signature.initSign(PrivateKey) will overwrite prior initialization.

Specified by:

initSign in interface Signature

Parameters:

privateKey - the private key to use for signing

update

public void update(byte[] foo)

Description copied from interface: Signature

Convenience method, same as calling Signature.update(byte[], int, int) with offset as 0 and H.length.

Specified by:

update in interface Signature

Parameters:

foo - the byte-array to update with

update

public void update(byte[] foo,
                   int off,
                   int len)

Description copied from interface: Signature

Update the computed signature with the given data.

Specified by:

update in interface Signature

Parameters:

foo - byte-array to update with

off - offset within the array

len - length until which to compute

sign

public byte[] sign()

Description copied from interface: Signature

Compute the signature.

Specified by:

sign in interface Signature

Returns:

the computed signature

extractSig

protected byte[] extractSig(byte[] sig,
                            java.lang.String expectedKeyAlgorithm)

Check whether the signature is generated using the expected algorithm, and if so, return the signature blob

Parameters:

sig - The full signature

expectedKeyAlgorithm - The expected key algorithm

Returns:

The blob part of the signature