de.flexiprovider.pqc.tss
Class TSS

java.lang.Object
  |
  +--java.security.SignatureSpi
        |
        +--de.flexiprovider.api.Signature
              |
              +--de.flexiprovider.pqc.tss.TSS

Direct Known Subclasses:

TSS.RIPEMD128, TSS.RIPEMD160, TSS.RIPEMD256, TSS.RIPEMD320, TSS.SHA1, TSS.SHA224, TSS.SHA256, TSS.SHA384, TSS.SHA512

public abstract class TSS

extends Signature

Inner Class Summary

static class	TSS.RIPEMD128 TSS with RIPEMD128
static class	TSS.RIPEMD160 TSS with RIPEMD160
static class	TSS.RIPEMD256 TSS with RIPEMD256
static class	TSS.RIPEMD320 TSS with RIPEMD320
static class	TSS.SHA1 TSS with SHA1
static class	TSS.SHA224 TSS with SHA224
static class	TSS.SHA256 TSS with SHA256
static class	TSS.SHA384 TSS with SHA384
static class	TSS.SHA512 TSS with SHA512

Field Summary

protected TSSHashFunction	hashFunction the hash-function described in the document
protected int	m
protected MessageDigest	messageDigest the message-digest used for the hashfunction
protected int	n
protected long	p

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

protected

TSS(MessageDigest md)

Method Summary

java.util.Vector	addGFPVector(java.util.Vector a, java.util.Vector b) Adds two Vectors of TSSPolynomial by adding the Polynomials in each Vector.
long[]	binary2ternary(byte[] binary)
boolean	checkBound(long[] arr, long bound) Checks if all of the values in the given array are smaller or equal the defined boundary
boolean	checkBound(java.util.Vector v, long bound) Checks if all of the values in the contained arrays are smaller or equal bound
static int	floor2Log(int i)
java.util.Vector	getPolyVector(int limit, int amount) returns a Vector of TSSPolynomials
void	initSign(PrivateKey privKey, SecureRandom random) Initialize the signature with the specified private key and source of randomness for signing operations.
void	initVerify(PublicKey pubKey) Initialize the signature with the specified public key for verification operations.
TSSPolynomial	oracle(TSSPolynomial gfp, byte[] b) returns a pseudo random TSSPolynomial with values <= |1|
void	setParameters(AlgorithmParameterSpec params) Initialize the signature with the specified parameters.
byte[]	sign() Return the signature of all the data updated so far.
void	update(byte input) Update the data to be signed or verified using the specified byte.
void	update(byte[] input, int inOff, int inLen) Update the data to be signed or verified, using the specified byte array of the specified length, starting at the specified offset.
boolean	verify(byte[] signature) Verify the passed-in signature of the specified message.

Methods inherited from class de.flexiprovider.api.Signature

engineGetParameter, engineInitSign, engineInitSign, engineInitVerify, engineSetParameter, engineSetParameter, engineSign, engineUpdate, engineUpdate, engineVerify, engineVerify, initSign, sign, update, verify, verify, verify

Methods inherited from class java.security.SignatureSpi

clone, engineSign

Methods inherited from class java.lang.Object

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

Field Detail

messageDigest

protected MessageDigest messageDigest

the message-digest used for the hashfunction

hashFunction

protected TSSHashFunction hashFunction

the hash-function described in the document

n

protected int n

m

protected int m

p

protected long p

Constructor Detail

TSS

protected TSS(MessageDigest md)

Method Detail

floor2Log

public static int floor2Log(int i)

addGFPVector

public java.util.Vector addGFPVector(java.util.Vector a,
                                     java.util.Vector b)

Adds two Vectors of TSSPolynomial by adding the Polynomials in each Vector. The Polynomial in Vector @a at position i is added to the Polynomial in Vector @b at position i. If one Vector is larger than the other, then the excess Polynomials of the larger Vector are not modified (Zero Poly added).

Parameters:

a - Vector containing TSSPolynomial

b - Vector containing TSSPolynomial

Returns:

The Vector of the added Polynomials

binary2ternary

public long[] binary2ternary(byte[] binary)

checkBound

public boolean checkBound(long[] arr,
                          long bound)

Checks if all of the values in the given array are smaller or equal the defined boundary

Parameters:

arr -

bound -

Returns:

checkBound

public boolean checkBound(java.util.Vector v,
                          long bound)

Checks if all of the values in the contained arrays are smaller or equal bound

Parameters:

v - a Vector containing long[]

bound -

Returns:

getPolyVector

public java.util.Vector getPolyVector(int limit,
                                      int amount)

returns a Vector of TSSPolynomials

Parameters:

limit - the limit of the elements in the polynomials (eg: 2 to receive polynomials with the values {-1, 0, 1})

amount - the amount of Polynomials in the vector

Returns:

the Vector of Polynomials

initSign

public void initSign(PrivateKey privKey,
                     SecureRandom random)
              throws InvalidKeyException

Description copied from class: Signature

Initialize the signature with the specified private key and source of randomness for signing operations.

Overrides:

initSign in class Signature

Following copied from class: de.flexiprovider.api.Signature

Parameters:

privKey - the private key of the identity whose signature will be generated.

random - the source of randomness

Throws:

InvalidKeyException - if the key is invalid for initializing the signature.

initVerify

public void initVerify(PublicKey pubKey)
                throws InvalidKeyException

Description copied from class: Signature

Initialize the signature with the specified public key for verification operations.

Overrides:

initVerify in class Signature

Following copied from class: de.flexiprovider.api.Signature

Parameters:

pubKey - the public key of the identity whose signature is going to be verified

Throws:

InvalidKeyException - if the key is invalid for initializing the signature.

oracle

public TSSPolynomial oracle(TSSPolynomial gfp,
                            byte[] b)

returns a pseudo random TSSPolynomial with values <= |1|

Parameters:

u - the input byte array for which to create the pseudo random output

Returns:

a pseudo random TSSPolynomial

Throws:

java.io.IOException -

codec.asn1.ASN1Exception -

setParameters

public void setParameters(AlgorithmParameterSpec params)
                   throws InvalidAlgorithmParameterException

Description copied from class: Signature

Initialize the signature with the specified parameters.

Overrides:

setParameters in class Signature

Following copied from class: de.flexiprovider.api.Signature

Parameters:

params - the parameters

Throws:

InvalidAlgorithmParameterException - if the given parameters are inappropriate for this signature.

sign

public byte[] sign()

Description copied from class: Signature

Return the signature of all the data updated so far.

Overrides:

sign in class Signature

Following copied from class: de.flexiprovider.api.Signature

Returns:

the signature

Throws:

SignatureException - if the engine is not initialized properly.

update

public void update(byte input)
            throws SignatureException

Description copied from class: Signature

Update the data to be signed or verified using the specified byte.

Overrides:

update in class Signature

Following copied from class: de.flexiprovider.api.Signature

Parameters:

input - the data byte

Throws:

SignatureException - if the engine is not initialized properly.

update

public void update(byte[] input,
                   int inOff,
                   int inLen)
            throws SignatureException

Description copied from class: Signature

Update the data to be signed or verified, using the specified byte array of the specified length, starting at the specified offset.

Overrides:

update in class Signature

Following copied from class: de.flexiprovider.api.Signature

Parameters:

input - the data byte array

inOff - the offset to start from in the array of bytes

inLen - the number of bytes to use, starting at inOff

Throws:

SignatureException - if the engine is not initialized properly

verify

public boolean verify(byte[] signature)
               throws SignatureException

Description copied from class: Signature

Verify the passed-in signature of the specified message.

Overrides:

verify in class Signature

Following copied from class: de.flexiprovider.api.Signature

Parameters:

signature - the signature

Returns:

true if the signature is valid, false otherwise.

Throws:

SignatureException - if the engine is not initialized properly or the passed-in signature is improperly encoded or of the wrong type.