Top Description Fields Constructors Methods
org.apache.sshd.common.signature

public Class SignatureDSA

extends AbstractSignature
Class Inheritance
Imports
java.io.StreamCorruptedException, java.math.BigInteger, java.security.SignatureException, java.util.Map, org.apache.sshd.common.keyprovider.KeyPairProvider, org.apache.sshd.common.session.SessionContext, org.apache.sshd.common.util.NumberUtils, .ValidateUtils, org.apache.sshd.common.util.buffer.BufferUtils, org.apache.sshd.common.util.io.der.DERParser, .DERWriter
DSA Signature
Author
Apache MINA SSHD Project
See Also
RFC4253 section 6.6

Field Summary

Modifier and TypeField and Description
public static final String
DEFAULT_ALGORITHM

public static final int
DSA_SIGNATURE_LENGTH

public static final int
MAX_SIGNATURE_VALUE_LENGTH

Constructor Summary

AccessConstructor and Description
public
SignatureDSA()

protected
SignatureDSA(String algorithm)

Method Summary

Modifier and TypeMethod and Description
public static void
putBigInteger(BigInteger value, byte[] result, int offset)

public byte[]
sign(SessionContext
The SessionContext for calling this method - may be null if not called within a session context
session)

Overrides org.apache.sshd.common.signature.AbstractSignature.sign.

Implements org.apache.sshd.common.signature.Signature.sign.

Compute the signature

public boolean
verify(SessionContext
The SessionContext for calling this method - may be null if not called within a session context
session, byte[]
The signed data
sig)

Implements org.apache.sshd.common.signature.Signature.verify.

Verify against the given signature

Inherited from org.apache.sshd.common.signature.AbstractSignature:
doInitSignaturedoVerifyextractEncodedSignatureextractEncodedSignaturegetAlgorithmgetSignatureinitSignerinitVerifiertoStringupdate

Field Detail

DEFAULT_ALGORITHMback to summary
public static final String DEFAULT_ALGORITHM
DSA_SIGNATURE_LENGTHback to summary
public static final int DSA_SIGNATURE_LENGTH
MAX_SIGNATURE_VALUE_LENGTHback to summary
public static final int MAX_SIGNATURE_VALUE_LENGTH

Constructor Detail

SignatureDSAback to summary
public SignatureDSA()
SignatureDSAback to summary
protected SignatureDSA(String algorithm)

Method Detail

putBigIntegerback to summary
public static void putBigInteger(BigInteger value, byte[] result, int offset)
signback to summary
public byte[] sign(SessionContext session) throws Exception

Overrides org.apache.sshd.common.signature.AbstractSignature.sign.

Implements org.apache.sshd.common.signature.Signature.sign.

Doc from org.apache.sshd.common.signature.Signature.sign.

Compute the signature

Parameters
session:SessionContext

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

Returns:byte[]

The signature value

Annotations
@Override
Exceptions
Exception:
If failed to calculate the signature
verifyback to summary
public boolean verify(SessionContext session, byte[] sig) throws Exception

Implements org.apache.sshd.common.signature.Signature.verify.

Doc from org.apache.sshd.common.signature.Signature.verify.

Verify against the given signature

Parameters
session:SessionContext

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

sig:byte[]

The signed data

Returns:boolean

true if signature is valid

Annotations
@Override
Exceptions
Exception:
If failed to extract signed data for validation