io.getlime.security.powerauth.client.signature

Class PowerAuthClientSignature

java.lang.Object

io.getlime.security.powerauth.client.signature.PowerAuthClientSignature

public class PowerAuthClientSignature
extends Object

Class implementing client-side signature related processes.

Author:

Petr Dvorak

Constructor Summary

Constructors

Constructor and Description
PowerAuthClientSignature()

Method Summary

Modifier and Type	Method and Description
String	signatureForData(byte[] data, List<SecretKey> signatureKeys, long ctr) Compute a PowerAuth 2.0 signature for given data, signature keys and counter.

Methods inherited from class java.lang.Object

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

Constructor Detail

PowerAuthClientSignature

public PowerAuthClientSignature()

Method Detail

signatureForData

public String signatureForData(byte[] data,
                               List<SecretKey> signatureKeys,
                               long ctr)
                        throws InvalidKeyException

Compute a PowerAuth 2.0 signature for given data, signature keys and counter. Signature keys are symmetric keys deduced using private device key KEY_DEVICE_PRIVATE and server public key KEY_SERVER_PUBLIC, and then using KDF function with proper index. See PowerAuth protocol specification for details.

Parameters:

data - Data to be signed.

signatureKeys - A signature keys.

ctr - Counter / index of the derived key KEY_DERIVED.

Returns:

PowerAuth 2.0 signature for given data.

Throws:

InvalidKeyException - In case signature key is invalid.