org.apache.sshd.common.signature

Class AbstractSecurityKeySignature

java.lang.Object

org.apache.sshd.common.signature.AbstractSecurityKeySignature

All Implemented Interfaces:

AlgorithmNameProvider, Signature

Direct Known Subclasses:

SignatureSkECDSA, SignatureSkED25519

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

Field Summary

Fields

Modifier and Type	Field and Description
private java.security.MessageDigest	challengeDigest
private static int	FLAG_USER_PRESENCE
private java.lang.String	keyType
private SecurityKeyPublicKey<?>	publicKey

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSecurityKeySignature(java.lang.String keyType)

Method Summary

Modifier and Type	Method and Description
protected abstract Signature	getDelegateSignature()
protected abstract java.lang.String	getSignatureKeyType()
void	initSigner(SessionContext session, java.security.PrivateKey key)
void	initVerifier(SessionContext session, java.security.PublicKey key)
byte[]	sign(SessionContext session) Compute the signature
void	update(SessionContext session, byte[] hash, int off, int len) Update the computed signature with the given data
boolean	verify(SessionContext session, byte[] sig) Verify against the given signature

Methods inherited from class java.lang.Object

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

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

update

Methods inherited from interface org.apache.sshd.common.AlgorithmNameProvider

getAlgorithm

Field Detail

FLAG_USER_PRESENCE

private static final int FLAG_USER_PRESENCE

See Also:

Constant Field Values

keyType

private final java.lang.String keyType

publicKey

private SecurityKeyPublicKey<?> publicKey

challengeDigest

private java.security.MessageDigest challengeDigest

Constructor Detail

AbstractSecurityKeySignature

protected AbstractSecurityKeySignature(java.lang.String keyType)

Method Detail

initVerifier

public void initVerifier(SessionContext session,
                         java.security.PublicKey key)
                  throws java.security.GeneralSecurityException

Specified by:

initVerifier in interface Signature

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:

java.security.GeneralSecurityException

update

public void update(SessionContext session,
                   byte[] hash,
                   int off,
                   int len)

Description copied from interface: Signature

Update the computed signature with the given data

Specified by:

update in interface Signature

Parameters:

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

hash - The hash data buffer

off - Offset of hash data in buffer

len - Length of hash data

getSignatureKeyType

protected abstract java.lang.String getSignatureKeyType()

getDelegateSignature

protected abstract Signature getDelegateSignature()

verify

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

Description copied from interface: Signature

Verify against the given signature

Specified by:

verify in interface 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:

java.lang.Exception - If failed to extract signed data for validation

initSigner

public void initSigner(SessionContext session,
                       java.security.PrivateKey key)

Specified by:

initSigner in interface Signature

Parameters:

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

key - The PrivateKey to be used for signing

sign

public byte[] sign(SessionContext session)

Description copied from interface: Signature

Compute the signature

Specified by:

sign in interface Signature

Parameters:

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

Returns:

The signature value