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

Class ServerTokenVerifier

java.lang.Object

io.getlime.security.powerauth.crypto.server.token.ServerTokenVerifier

public class ServerTokenVerifier
extends Object

Class to simplify token verification on the server side.

Author:

Petr Dvorak, petr@wultra.com

Constructor Summary

Constructors

Constructor	Description
ServerTokenVerifier()

Method Summary

Modifier and Type	Method	Description
byte[]	convertTokenTimestamp(long timestamp)	Helper method to convert provided timestamp into bytes (from string representation), for the purpose of token timestamping.
boolean	validateTokenDigest(byte[] nonce, byte[] timestamp, String version, byte[] tokenSecret, byte[] tokenDigest)	Validate provided token digest for given input data and provided token secret.

Methods inherited from class java.lang.Object

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

Constructor Details

ServerTokenVerifier

public ServerTokenVerifier()

Method Details

convertTokenTimestamp

public byte[] convertTokenTimestamp(long timestamp)

Helper method to convert provided timestamp into bytes (from string representation), for the purpose of token timestamping.

Parameters:

timestamp - Timestamp to be converted.

Returns:

Provided timestamp in milliseconds converted as bytes.

validateTokenDigest

public boolean validateTokenDigest(byte[] nonce,
 byte[] timestamp,
 String version,
 byte[] tokenSecret,
 byte[] tokenDigest)
                            throws GenericCryptoException,
CryptoProviderException

Validate provided token digest for given input data and provided 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.

tokenDigest - Token digest, 32 bytes to be validated.

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.