de.flexiprovider.pqc.hbc.ots
Class LMOTS

java.lang.Object
  |
  +--de.flexiprovider.pqc.hbc.ots.LMOTS

All Implemented Interfaces:

OTS

public class LMOTS

extends java.lang.Object

implements OTS

Constructor Summary

LMOTS()
Constructor.

Method Summary

boolean	canComputeVerificationKeyFromSignature() The verification key of come one-time signature schemes can be computes from the signature.
byte[]	computeVerificationKey(byte[] bytes, byte[] sigBytes) Compute the verification OTS key from the one-time signature of a message.
void	generateKeyPair(byte[] seed) Generate an OTS key pair using the given seed and the message digest and PRNG specified via init(MessageDigest, PRNG).
void	generateSignatureKey(byte[] seed) Generate an OTS signature key the given seed and the message digest and PRNG specified via init(MessageDigest, PRNG).
void	generateVerificationKey() Generate an OTS verification key from the previously generated signature key given the message digest specified via init(MessageDigest, PRNG).
int	getSignatureLength()
byte[]	getVerificationKey()
int	getVerificationKeyLength()
void	init(MessageDigest md, PRNG rng) Initialize the OTS.
byte[]	sign(byte[] bytes) Generate a one-time signature of the given message using the private key generated via generateKeyPair(byte[]).
boolean	verify(byte[] message, byte[] signedMessage, byte[] verificationKey) Verify a one-time signature of the given message using the verification key generated via generateKeyPair(byte[]).

Methods inherited from class java.lang.Object

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

Constructor Detail

LMOTS

public LMOTS()

Constructor.

Method Detail

canComputeVerificationKeyFromSignature

public boolean canComputeVerificationKeyFromSignature()

Description copied from interface: OTS

The verification key of come one-time signature schemes can be computes from the signature.

Specified by:

canComputeVerificationKeyFromSignature in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Returns:

true if that is the case and false otherwise

computeVerificationKey

public byte[] computeVerificationKey(byte[] bytes,
                                     byte[] sigBytes)

Description copied from interface: OTS

Compute the verification OTS key from the one-time signature of a message. This is *NOT* a complete OTS signature verification, but it suffices for usage with CMSS.

Specified by:

computeVerificationKey in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Parameters:

mBytes - the message

sigBytes - the one-time signature

Returns:

the verification OTS key

generateKeyPair

public void generateKeyPair(byte[] seed)

Description copied from interface: OTS

Generate an OTS key pair using the given seed and the message digest and PRNG specified via OTS.init(MessageDigest, PRNG).

Specified by:

generateKeyPair in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Parameters:

seed - the seed for the PRGN

generateSignatureKey

public void generateSignatureKey(byte[] seed)

Description copied from interface: OTS

Generate an OTS signature key the given seed and the message digest and PRNG specified via OTS.init(MessageDigest, PRNG).

Specified by:

generateSignatureKey in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Parameters:

seed - the seed for the PRGN

generateVerificationKey

public void generateVerificationKey()

Description copied from interface: OTS

Generate an OTS verification key from the previously generated signature key given the message digest specified via OTS.init(MessageDigest, PRNG).

Specified by:

generateVerificationKey in interface OTS

getSignatureLength

public int getSignatureLength()

Specified by:

getSignatureLength in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Returns:

the length of the one-time signature

getVerificationKey

public byte[] getVerificationKey()

Specified by:

getVerificationKey in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Returns:

the verification key generated via OTS.generateKeyPair(byte[])

getVerificationKeyLength

public int getVerificationKeyLength()

Specified by:

getVerificationKeyLength in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Returns:

the length of the one-time verification key

init

public void init(MessageDigest md,
                 PRNG rng)

Description copied from interface: OTS

Initialize the OTS.

Specified by:

init in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Parameters:

md - the hash function for the OTS

rng - the name of the PRNG used for key pair generation

sign

public byte[] sign(byte[] bytes)

Description copied from interface: OTS

Generate a one-time signature of the given message using the private key generated via OTS.generateKeyPair(byte[]).

Specified by:

sign in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Parameters:

mBytes - the message

Returns:

the one-time signature of the message

verify

public boolean verify(byte[] message,
                      byte[] signedMessage,
                      byte[] verificationKey)

Description copied from interface: OTS

Verify a one-time signature of the given message using the verification key generated via OTS.generateKeyPair(byte[]).

Specified by:

verify in interface OTS

Following copied from interface: de.flexiprovider.pqc.hbc.ots.OTS

Parameters:

mBytes - the message

sBytes - the signature

pBytes - the verification key

Returns:

true if signature is valid and false otherwise