org.cryptacular.generator

Class HOTPGenerator

java.lang.Object

org.cryptacular.generator.AbstractOTPGenerator

org.cryptacular.generator.HOTPGenerator

public class HOTPGenerator
extends AbstractOTPGenerator

OTP generator component that implements the HOTP scheme described in RFC 4226.

Constructor Summary

Constructors

Constructor and Description
HOTPGenerator()

Method Summary

Modifier and Type	Method and Description
int	generate(byte[] key, long count) Generates the OTP given a per-user key and invocation count.
protected org.bouncycastle.crypto.Digest	getDigest()

Methods inherited from class org.cryptacular.generator.AbstractOTPGenerator

generateInternal, getNumberOfDigits, setNumberOfDigits

Methods inherited from class java.lang.Object

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

Constructor Detail

HOTPGenerator

public HOTPGenerator()

Method Detail

generate

public int generate(byte[] key,
                    long count)

Generates the OTP given a per-user key and invocation count.

Parameters:

key - Per-user key.

count - Counter moving factor.

Returns:

Integer OTP.

getDigest

protected org.bouncycastle.crypto.Digest getDigest()

Specified by:

getDigest in class AbstractOTPGenerator

Returns:

Digest algorithm used for HMAC operation.