org.lightningj.paywall.util

Class Signer

java.lang.Object

org.lightningj.paywall.util.Signer

public class Signer
extends java.lang.Object

Help methods to ECDSA Sign a given text. Created by philip on 2018-10-11.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ALG_SHA256_WITH_ECDSA

Constructor Summary

Constructors

Constructor and Description
Signer(java.lang.String algorithm) Constructor using the specified algoritm (one of ALG_ constants) when generating signatures.
Signer(java.lang.String algorithm, java.lang.String provider) Constructor using the specified algoritm (one of ALG_ constants) and provider when generating signatures.

Method Summary

Modifier and Type	Method and Description
byte[]	sign(java.security.PrivateKey privKey, byte[] data) Method to generate a cryptographic signature of the data using the specificed algorithm and the given curve of the given private key.
boolean	verify(java.security.PublicKey pubKey, byte[] data, byte[] signature) Help method to verify a signature.

Methods inherited from class java.lang.Object

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

Field Detail

ALG_SHA256_WITH_ECDSA

public static final java.lang.String ALG_SHA256_WITH_ECDSA

See Also:

Constant Field Values

Constructor Detail

Signer

public Signer(java.lang.String algorithm)

Constructor using the specified algoritm (one of ALG_ constants) when generating signatures. Uses BC as provider.

Parameters:

algorithm - the algorithm to use.

Signer

public Signer(java.lang.String algorithm,
              java.lang.String provider)

Constructor using the specified algoritm (one of ALG_ constants) and provider when generating signatures.

Parameters:

algorithm - the algorithm to use.

provider - the provider to use.

Method Detail

sign

public byte[] sign(java.security.PrivateKey privKey,
                   byte[] data)
            throws InternalErrorException

Method to generate a cryptographic signature of the data using the specificed algorithm and the given curve of the given private key.

Parameters:

privKey - the private key to use for the signature.

data - the data to hash and sign.

Returns:

the DER encoded signature.

Throws:

InternalErrorException - if internal problems occurred generating the signature.

verify

public boolean verify(java.security.PublicKey pubKey,
                      byte[] data,
                      byte[] signature)
               throws InternalErrorException

Help method to verify a signature.

Parameters:

pubKey - the public key to verify.

data - the data to verify

signature - the signature to verify

Returns:

true if signature verifies.

Throws:

InternalErrorException - in problems occurred verifying the signature.