Class LegacyDSASigner

java.lang.Object

java.security.SignatureSpi

java.security.Signature

org.apache.sshd.contrib.common.signature.LegacyDSASigner

public class LegacyDSASigner
extends Signature

A special signer for DSA that uses SHA-1 regardless of the key size

See Also:

• SSHD-945 issue

Field Summary

Fields

Modifier and Type	Field	Description
static final String	LEGACY_SIGNATURE
protected final MessageDigest	md
protected DSAParams	params
protected final org.apache.sshd.common.Factory<org.apache.sshd.common.random.Random>	randomFactory
protected BigInteger	x
protected BigInteger	y

Fields inherited from class Signature

SIGN, state, UNINITIALIZED, VERIFY

Fields inherited from class SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor	Description
LegacyDSASigner(org.apache.sshd.common.Factory<org.apache.sshd.common.random.Random> randomFactory)

Method Summary

Modifier and Type	Method	Description
protected Object	engineGetParameter(String key)	Deprecated.
protected void	engineInitSign(PrivateKey key)
protected void	engineInitVerify(PublicKey key)
protected void	engineSetParameter(String key, Object param)	Deprecated.
protected byte[]	engineSign()
protected void	engineUpdate(byte b)
protected void	engineUpdate(byte[] data, int off, int len)
protected void	engineUpdate(ByteBuffer b)
protected boolean	engineVerify(byte[] signature)
protected boolean	engineVerify(byte[] signature, int offset, int length)
protected BigInteger	generateK(BigInteger q)
protected BigInteger	generateR(BigInteger p, BigInteger q, BigInteger g, BigInteger k)
protected BigInteger	generateS(BigInteger x, BigInteger q, BigInteger r, BigInteger k)
protected BigInteger	generateV(BigInteger y, BigInteger p, BigInteger q, BigInteger g, BigInteger w, BigInteger r)
protected BigInteger	generateW(BigInteger p, BigInteger q, BigInteger g, BigInteger s)
protected void	initDSAParameters(DSAKey key)

Methods inherited from class 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 SignatureSpi

engineGetParameters, engineInitSign, engineSetParameter, engineSign

Methods inherited from class Object

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

Field Details

LEGACY_SIGNATURE

public static final String LEGACY_SIGNATURE

See Also:

• Constant Field Values

md

protected final MessageDigest md

randomFactory

protected final org.apache.sshd.common.Factory<org.apache.sshd.common.random.Random> randomFactory

x

protected BigInteger x

y

protected BigInteger y

params

protected DSAParams params

Constructor Details

LegacyDSASigner

public LegacyDSASigner(org.apache.sshd.common.Factory<org.apache.sshd.common.random.Random> randomFactory)
                throws GeneralSecurityException

Throws:

GeneralSecurityException

Method Details

engineSetParameter

@Deprecated
protected void engineSetParameter(String key,
 Object param)

Deprecated.

Specified by:

engineSetParameter in class SignatureSpi

engineGetParameter

@Deprecated
protected Object engineGetParameter(String key)

Deprecated.

Specified by:

engineGetParameter in class SignatureSpi

initDSAParameters

protected void initDSAParameters(DSAKey key)
                          throws InvalidKeyException

Throws:

InvalidKeyException

engineInitSign

protected void engineInitSign(PrivateKey key)
                       throws InvalidKeyException

Specified by:

engineInitSign in class SignatureSpi

Throws:

InvalidKeyException

engineSign

protected byte[] engineSign()
                     throws SignatureException

Specified by:

engineSign in class SignatureSpi

Throws:

SignatureException

generateK

protected BigInteger generateK(BigInteger q)

generateR

protected BigInteger generateR(BigInteger p,
 BigInteger q,
 BigInteger g,
 BigInteger k)

generateS

protected BigInteger generateS(BigInteger x,
 BigInteger q,
 BigInteger r,
 BigInteger k)

engineInitVerify

protected void engineInitVerify(PublicKey key)
                         throws InvalidKeyException

Specified by:

engineInitVerify in class SignatureSpi

Throws:

InvalidKeyException

engineVerify

protected boolean engineVerify(byte[] signature)
                        throws SignatureException

Specified by:

engineVerify in class SignatureSpi

Throws:

SignatureException

engineVerify

protected boolean engineVerify(byte[] signature,
 int offset,
 int length)
                        throws SignatureException

Overrides:

engineVerify in class SignatureSpi

Throws:

SignatureException

generateW

protected BigInteger generateW(BigInteger p,
 BigInteger q,
 BigInteger g,
 BigInteger s)

generateV

protected BigInteger generateV(BigInteger y,
 BigInteger p,
 BigInteger q,
 BigInteger g,
 BigInteger w,
 BigInteger r)

engineUpdate

protected void engineUpdate(byte b)

Specified by:

engineUpdate in class SignatureSpi

engineUpdate

protected void engineUpdate(byte[] data,
 int off,
 int len)

Specified by:

engineUpdate in class SignatureSpi

engineUpdate

protected void engineUpdate(ByteBuffer b)

Overrides:

engineUpdate in class SignatureSpi