net.adamcin.httpsig.ssh.jce
Class SSHDSSSignature

java.lang.Object
  java.security.SignatureSpi
      java.security.Signature
          net.adamcin.httpsig.ssh.jce.SSHDSSSignature

public final class SSHDSSSignature
extends Signature

The "ssh-dss" key format has the following specific encoding: string "ssh-dss" mpint p mpint q mpint g mpint y Here, the 'p', 'q', 'g', and 'y' parameters form the signature key blob. Signing and verifying using this key format is done according to the Digital Signature Standard [FIPS-186-2] using the SHA-1 hash [FIPS-180-2]. The resulting signature is encoded as follows: string "ssh-dss" string dss_signature_blob The value for 'dss_signature_blob' is encoded as a string containing r, followed by s (which are 160-bit integers, without lengths or padding, unsigned, and in network byte order).

Field Summary

Fields inherited from class java.security.Signature

SIGN, state, UNINITIALIZED, VERIFY

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

SSHDSSSignature()

Method Summary

protected Object	engineGetParameter(String param)
protected void	engineInitSign(PrivateKey privateKey)
protected void	engineInitVerify(PublicKey publicKey)
protected void	engineSetParameter(String param, Object value)
protected byte[]	engineSign()
protected void	engineUpdate(byte b)
protected void	engineUpdate(byte[] b, int off, int len)
protected boolean	engineVerify(byte[] sigBytes)

Methods inherited from class java.security.Signature

clone, getAlgorithm, getInstance, getInstance, getInstance, getParameter, getParameters, getProvider, initSign, initSign, initVerify, initVerify, setParameter, setParameter, sign, sign, toString, update, update, update, update, verify, verify

Methods inherited from class java.security.SignatureSpi

engineGetParameters, engineInitSign, engineSetParameter, engineSign, engineUpdate, engineVerify

Methods inherited from class java.lang.Object

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

Constructor Detail

SSHDSSSignature

public SSHDSSSignature()
                throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

Method Detail

engineInitVerify

protected void engineInitVerify(PublicKey publicKey)
                         throws InvalidKeyException

Specified by:

engineInitVerify in class SignatureSpi

Throws:

InvalidKeyException

engineInitSign

protected void engineInitSign(PrivateKey privateKey)
                       throws InvalidKeyException

Specified by:

engineInitSign in class SignatureSpi

Throws:

InvalidKeyException

engineUpdate

protected void engineUpdate(byte b)
                     throws SignatureException

Specified by:

engineUpdate in class SignatureSpi

Throws:

SignatureException

engineUpdate

protected void engineUpdate(byte[] b,
                            int off,
                            int len)
                     throws SignatureException

Specified by:

engineUpdate in class SignatureSpi

Throws:

SignatureException

engineSign

protected byte[] engineSign()
                     throws SignatureException

Specified by:

engineSign in class SignatureSpi

Throws:

SignatureException

engineVerify

protected boolean engineVerify(byte[] sigBytes)
                        throws SignatureException

Specified by:

engineVerify in class SignatureSpi

Throws:

SignatureException

engineSetParameter

protected void engineSetParameter(String param,
                                  Object value)
                           throws InvalidParameterException

Specified by:

engineSetParameter in class SignatureSpi

Throws:

InvalidParameterException

engineGetParameter

protected Object engineGetParameter(String param)
                             throws InvalidParameterException

Specified by:

engineGetParameter in class SignatureSpi

Throws:

InvalidParameterException