Package io.getlime.security.powerauth.crypto.client.token

Class ClientTokenGenerator

java.lang.Object

io.getlime.security.powerauth.crypto.client.token.ClientTokenGenerator

public class ClientTokenGenerator
extends Object

Class that simplifies working with tokens on the client side.

Author:

Petr Dvorak, petr@wultra.com

Constructor Summary

Constructors

Constructor	Description
ClientTokenGenerator()

Method Summary

Modifier and Type	Method	Description
byte[]	computeTokenDigest(byte[] nonce, byte[] timestamp, String version, byte[] tokenSecret)	Compute the digest of provided token information using given token secret.
byte[]	generateTokenNonce()	Generate random token nonce, 16 random bytes.
byte[]	generateTokenTimestamp()	Helper method to get current timestamp for the purpose of token timestamping, encoded as bytes (from string representation).

Methods inherited from class java.lang.Object

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

Constructor Details

ClientTokenGenerator

public ClientTokenGenerator()

Method Details

generateTokenNonce

public byte[] generateTokenNonce()
                          throws CryptoProviderException

Generate random token nonce, 16 random bytes.

Returns:

Random token nonce.

Throws:

CryptoProviderException - In case key cryptography provider is incorrectly initialized.

generateTokenTimestamp

public byte[] generateTokenTimestamp()

Helper method to get current timestamp for the purpose of token timestamping, encoded as bytes (from string representation).

Returns:

Current timestamp in milliseconds.

computeTokenDigest

public byte[] computeTokenDigest(byte[] nonce,
 byte[] timestamp,
 String version,
 byte[] tokenSecret)
                          throws GenericCryptoException,
CryptoProviderException

Compute the digest of provided token information using given token secret.

Parameters:

nonce - Token nonce, 16 random bytes.

timestamp - Token timestamp, Unix timestamp format encoded as bytes (from string representation).

version - Protocol version.

tokenSecret - Token secret, 16 random bytes.

Returns:

Token digest computed using provided data bytes with given token secret.

Throws:

GenericCryptoException - In case digest computation fails.

CryptoProviderException - In case cryptography provider is incorrectly initialized.