com.mindbright.ssh2
Class SSH2DSS

java.lang.Object
  com.mindbright.ssh2.SSH2Signature
      com.mindbright.ssh2.SSH2SimpleSignature
          com.mindbright.ssh2.SSH2DSS

All Implemented Interfaces:

SSH2PKISigner

public final class SSH2DSS
extends SSH2SimpleSignature

Implements "ssh-dss" signatures according to the ssh standard.

Nested Class Summary

static class

SSH2DSS.DSASIG

Field Summary

static java.lang.String

SSH2_KEY_FORMAT

Fields inherited from class com.mindbright.ssh2.SSH2SimpleSignature

draftIncompatibleSignature, signatureAlgorithm, ssh2KeyFormat

Fields inherited from class com.mindbright.ssh2.SSH2Signature

algorithm, pubKeyBlob, publicKey, signature

Constructor Summary

SSH2DSS()
Constructor.

Method Summary

java.security.PublicKey	decodePublicKey(byte[] pubKeyBlob) Decode a public key blob.
byte[]	encodePublicKey(java.security.PublicKey publicKey) Encode the given public key into a public key blob.
byte[]	sign(byte[] data) Sign the given data.
boolean	verify(byte[] sigBlob, byte[] data) Verify that the given signature matches the given data and the public key.

Methods inherited from class com.mindbright.ssh2.SSH2SimpleSignature

decodeSignature, encodeSignature, getKeyFormat, getSignatureAlgorithm, getVerifyInstance, setIncompatibility

Methods inherited from class com.mindbright.ssh2.SSH2Signature

clearSensitiveData, getAlgorithmName, getEncodingInstance, getInstance, getPublicKey, getPublicKeyBlob, initSign, initVerify, initVerify, setPublicKey

Methods inherited from class java.lang.Object

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

Field Detail

SSH2_KEY_FORMAT

public static final java.lang.String SSH2_KEY_FORMAT

See Also:

Constant Field Values

Constructor Detail

SSH2DSS

public SSH2DSS()

Constructor.

Method Detail

encodePublicKey

public byte[] encodePublicKey(java.security.PublicKey publicKey)
                       throws SSH2Exception

Description copied from class: SSH2Signature

Encode the given public key into a public key blob.

Specified by:

encodePublicKey in class SSH2Signature

Parameters:

publicKey - The public key to encode. Must be an instance of DSAPublicKey.

Returns:

A byte array containing the key suitably encoded.

Throws:

SSH2Exception

decodePublicKey

public java.security.PublicKey decodePublicKey(byte[] pubKeyBlob)
                                        throws SSH2Exception

Description copied from class: SSH2Signature

Decode a public key blob.

Specified by:

decodePublicKey in class SSH2Signature

Parameters:

pubKeyBlob - A byte array containing a public key blob.

Returns:

A Publickey instance.

Throws:

SSH2Exception

sign

public byte[] sign(byte[] data)
            throws SSH2SignatureException

Description copied from class: SSH2Signature

Sign the given data. The object must have been initialized for signing first.

Specified by:

sign in interface SSH2PKISigner

Overrides:

sign in class SSH2Signature

Parameters:

data - Data to sign.

Returns:

A signature blob encoded in the ssh format.

Throws:

SSH2SignatureException

verify

public boolean verify(byte[] sigBlob,
                      byte[] data)
               throws SSH2SignatureException

Description copied from class: SSH2Signature

Verify that the given signature matches the given data and the public key. The public key is given in the initialization call.

Overrides:

verify in class SSH2Signature

Parameters:

sigBlob - Signature blob encoded in the ssh format.

data - Signed data.

Returns:

True if the signature matches.

Throws:

SSH2SignatureException