com.sun.squawk.security
Class ECPublicKey

java.lang.Object
  com.sun.squawk.security.ECPublicKey

public final class ECPublicKey
extends Object

Field Summary

protected int	bitsize Key size in bits, e.g.
protected int	bytesize
protected ECCurveFp	curve Flag indicating if the key has been initialized.
protected FFA	ffa
boolean	initOk
protected ECPoint	keyData

Constructor Summary

ECPublicKey()

Method Summary

void	clearKey()
ECCurveFp	getCurve()
ECPoint	getKeyData()
int	getSize()
int	getW(byte[] buffer, int offset) Returns the point of the curve comprising the public key in plain text form.
void	setW(byte[] buffer, int offset, int length) Sets the point of the curve comprising the public key.

Methods inherited from class java.lang.Object

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

Field Detail

keyData

protected ECPoint keyData

bitsize

protected int bitsize

Key size in bits, e.g. for RSA, this is modulus size.

bytesize

protected int bytesize

curve

protected ECCurveFp curve

Flag indicating if the key has been initialized.

ffa

protected FFA ffa

initOk

public boolean initOk

Constructor Detail

ECPublicKey

public ECPublicKey()

Method Detail

setW

public void setW(byte[] buffer,
                 int offset,
                 int length)
          throws CryptoException

Sets the point of the curve comprising the public key. The point should be specified as an octet string as per ANSI X9.62. A specific implementation need not support the compressed form, but must support the uncompressed form of the point. The plain text data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte). Input parameter data is copied into the internal representation.

Parameters:

buffer - the input buffer

offset - the offset into the input buffer at which the point specification begins

length - the byte length of the point specificiation

Throws:

javacard.security.CryptoException - with the following reason code:

• CryptoException.ILLEGAL_VALUE if the input parameter data format is incorrect, or if the input parameter data is inconsistent with the elliptic curve.

CryptoException

getW

public int getW(byte[] buffer,
                int offset)
         throws CryptoException

Returns the point of the curve comprising the public key in plain text form. The point is represented as an octet string in compressed or uncompressed forms as per ANSI X9.62. The data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte).

Parameters:

buffer - the output buffer

offset - the offset into the output buffer at which the point specification data is to begin

Returns:

the byte length of the point specificiation

Throws:

javacard.security.CryptoException - with the following reason code:

• CryptoException.UNINITIALIZED_KEY if the point of the curve comprising the public key has not been successfully initialized since the time the initialized state of the key was set to false.

CryptoException

See Also:

javacard.security.Key

getSize

public int getSize()

getKeyData

public ECPoint getKeyData()

clearKey

public void clearKey()

getCurve

public ECCurveFp getCurve()