org.apache.sshd.common.signature

Class SignatureRSA

java.lang.Object

org.apache.sshd.common.signature.AbstractSignature

org.apache.sshd.common.signature.SignatureRSA

All Implemented Interfaces:

AlgorithmNameProvider, Signature

Direct Known Subclasses:

SignatureRSASHA1, SignatureRSASHA256, SignatureRSASHA512

public abstract class SignatureRSA
extends AbstractSignature

RSA Signature

Author:

Apache MINA SSHD Project

See Also:

RFC4253 section 6.6

Field Summary

Fields

Modifier and Type	Field and Description
static NavigableSet<String>	SUPPORTED_KEY_TYPES

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SignatureRSA(String algorithm, String sshAlgorithmName)

Method Summary

Modifier and Type	Method and Description
String	getSshAlgorithmName(String algo)
protected int	getVerifierSignatureSize()
static int	getVerifierSignatureSize(RSAKey key)
void	initVerifier(SessionContext session, PublicKey key)
boolean	verify(SessionContext session, byte[] sig) Verify against the given signature

Methods inherited from class org.apache.sshd.common.signature.AbstractSignature

doInitSignature, doVerify, extractEncodedSignature, extractEncodedSignature, getAlgorithm, getSignature, initSigner, sign, toString, update

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.sshd.common.signature.Signature

update

Field Detail

SUPPORTED_KEY_TYPES

public static final NavigableSet<String> SUPPORTED_KEY_TYPES

Constructor Detail

SignatureRSA

protected SignatureRSA(String algorithm,
                       String sshAlgorithmName)

Method Detail

getSshAlgorithmName

public String getSshAlgorithmName(String algo)

Parameters:

algo - - the negotiated value

Returns:

The original ssh name of the signature algorithm

getVerifierSignatureSize

protected int getVerifierSignatureSize()

Returns:

The expected number of bytes in the signature - non-positive if not initialized or not intended to be used for verification

initVerifier

public void initVerifier(SessionContext session,
                         PublicKey key)
                  throws Exception

Specified by:

initVerifier in interface Signature

Overrides:

initVerifier in class AbstractSignature

Parameters:

session - The SessionContext for calling this method - may be null if not called within a session context

key - The PublicKey to be used for verifying signatures

Throws:

Exception - If failed to initialize

getVerifierSignatureSize

public static int getVerifierSignatureSize(RSAKey key)

verify

public boolean verify(SessionContext session,
                      byte[] sig)
               throws Exception

Description copied from interface: Signature

Verify against the given signature

Parameters:

session - The SessionContext for calling this method - may be null if not called within a session context

sig - The signed data

Returns:

true if signature is valid

Throws:

Exception - If failed to extract signed data for validation