com.mindbright.ssh2

Class SSH2SimpleSignature

java.lang.Object

com.mindbright.ssh2.SSH2Signature

com.mindbright.ssh2.SSH2SimpleSignature

All Implemented Interfaces:

SSH2PKISigner

Direct Known Subclasses:

SSH2DSS, SSH2ECDSASHA2NIST, SSH2RSA

public abstract class SSH2SimpleSignature
extends SSH2Signature

Handle signatures for the ssh draft standard algorithms.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	draftIncompatibleSignature
protected java.lang.String	signatureAlgorithm
protected java.lang.String	ssh2KeyFormat

Fields inherited from class com.mindbright.ssh2.SSH2Signature

algorithm, pubKeyBlob, publicKey, signature

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SSH2SimpleSignature(java.lang.String signatureAlgorithm, java.lang.String ssh2KeyFormat) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	decodeSignature(byte[] sigBlob) Decode a signature encoded according to the ssh standard.
byte[]	encodeSignature(byte[] sigRaw) Encode the given signature into the form specified by the ssh standard.
static java.lang.String	getKeyFormat(byte[] pubKeyBlob) Get the key format of the given public key.
java.lang.String	getSignatureAlgorithm() Get the signature algorithm name.
static SSH2Signature	getVerifyInstance(byte[] pubKeyBlob) Get an instance of SSH2Signature which is prepared to do a verify operation which the given public key.
void	setIncompatibility(SSH2Transport transport) Set the appropriate incompatibility mode which depends on the peer version.

Methods inherited from class com.mindbright.ssh2.SSH2Signature

clearSensitiveData, decodePublicKey, encodePublicKey, getAlgorithmName, getEncodingInstance, getInstance, getPublicKey, getPublicKeyBlob, initSign, initVerify, initVerify, setPublicKey, sign, verify

Methods inherited from class java.lang.Object

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

Field Detail

signatureAlgorithm

protected java.lang.String signatureAlgorithm

ssh2KeyFormat

protected java.lang.String ssh2KeyFormat

draftIncompatibleSignature

protected boolean draftIncompatibleSignature

Constructor Detail

SSH2SimpleSignature

protected SSH2SimpleSignature(java.lang.String signatureAlgorithm,
                   java.lang.String ssh2KeyFormat)

Constructor.

Parameters:

signatureAlgorithm - The algorithm name to use when looking in the crypto provider for the implementation.

ssh2KeyFormat - The ssh2 name for this algorithm.

Method Detail

getVerifyInstance

public static SSH2Signature getVerifyInstance(byte[] pubKeyBlob)
                                       throws SSH2Exception

Get an instance of SSH2Signature which is prepared to do a verify operation which the given public key.

Parameters:

pubKeyBlob - Blob containing the public key to use.

Throws:

SSH2Exception

getSignatureAlgorithm

public final java.lang.String getSignatureAlgorithm()

Get the signature algorithm name. Used internally to find the right implementation of the algorithm.

Specified by:

getSignatureAlgorithm in class SSH2Signature

Returns:

The name of the algorithm.

encodeSignature

public byte[] encodeSignature(byte[] sigRaw)

Encode the given signature into the form specified by the ssh standard.

Specified by:

encodeSignature in class SSH2Signature

Parameters:

sigRaw - The signature as a raw byte array.

Returns:

The encoded signature as a byte array.

decodeSignature

public byte[] decodeSignature(byte[] sigBlob)
                       throws SSH2SignatureException

Decode a signature encoded according to the ssh standard.

Specified by:

decodeSignature in class SSH2Signature

Parameters:

sigBlob - a signature blob encoded according to the ssh standard.

Returns:

The raw signature

Throws:

SSH2SignatureException

getKeyFormat

public static java.lang.String getKeyFormat(byte[] pubKeyBlob)

Get the key format of the given public key.

Parameters:

pubKeyBlob - the public key blob (encoded accoring to the ssh standard).

Returns:

The ssh name of the key format.

setIncompatibility

public void setIncompatibility(SSH2Transport transport)

Set the appropriate incompatibility mode which depends on the peer version.

Specified by:

setIncompatibility in interface SSH2PKISigner

Overrides:

setIncompatibility in class SSH2Signature

Parameters:

transport - SSH2Transport object which identifies the peer.