io.nem.core.crypto

Class Signer

java.lang.Object

io.nem.core.crypto.Signer

All Implemented Interfaces:

DsaSigner

public class Signer
extends java.lang.Object
implements DsaSigner

Wraps DSA signing and verification logic.

Constructor Summary

Constructors

Constructor and Description
Signer(DsaSigner signer) Creates a signer around a DsaSigner.
Signer(KeyPair keyPair) Creates a signer around a KeyPair.
Signer(KeyPair keyPair, CryptoEngine engine) Creates a signer around a KeyPair.

Method Summary

Modifier and Type	Method and Description
boolean	isCanonicalSignature(Signature signature) Determines if the signature is canonical.
Signature	makeSignatureCanonical(Signature signature) Makes this signature canonical.
Signature	sign(byte[] data) Signs the SHA3 hash of an arbitrarily sized message.
boolean	verify(byte[] data, Signature signature) Verifies that the signature is valid.

Methods inherited from class java.lang.Object

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

Constructor Detail

Signer

public Signer(KeyPair keyPair)

Creates a signer around a KeyPair.

Parameters:

keyPair - The KeyPair that should be used for signing and verification.

Signer

public Signer(KeyPair keyPair,
              CryptoEngine engine)

Creates a signer around a KeyPair.

Parameters:

keyPair - The KeyPair that should be used for signing and verification.

engine - The crypto engine.

Signer

public Signer(DsaSigner signer)

Creates a signer around a DsaSigner.

Parameters:

signer - The signer.

Method Detail

sign

public Signature sign(byte[] data)

Description copied from interface: DsaSigner

Signs the SHA3 hash of an arbitrarily sized message.

Specified by:

sign in interface DsaSigner

Parameters:

data - The message to sign.

Returns:

The generated signature.

verify

public boolean verify(byte[] data,
                      Signature signature)

Description copied from interface: DsaSigner

Verifies that the signature is valid.

Specified by:

verify in interface DsaSigner

Parameters:

data - The original message.

signature - The generated signature.

Returns:

true if the signature is valid.

isCanonicalSignature

public boolean isCanonicalSignature(Signature signature)

Description copied from interface: DsaSigner

Determines if the signature is canonical.

Specified by:

isCanonicalSignature in interface DsaSigner

Parameters:

signature - The signature.

Returns:

true if the signature is canonical.

makeSignatureCanonical

public Signature makeSignatureCanonical(Signature signature)

Description copied from interface: DsaSigner

Makes this signature canonical.

Specified by:

makeSignatureCanonical in interface DsaSigner

Parameters:

signature - The signature.

Returns:

Signature in canonical form.