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com.licel.jcardsim.crypto
Class DSAPrivateKeyImpl

java.lang.Object
  com.licel.jcardsim.crypto.KeyImpl
      com.licel.jcardsim.crypto.DSAKeyImpl
          com.licel.jcardsim.crypto.DSAPrivateKeyImpl

All Implemented Interfaces:

KeyWithParameters, DSAKey, DSAPrivateKey, Key, PrivateKey

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public class DSAPrivateKeyImpl
extends DSAKeyImpl
implements DSAPrivateKey

Implementation DSAPrivateKey based on BouncyCastle CryptoAPI

See Also:

DSAPrivateKey, DSAPrivateKeyParameters

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Field Summary
protected  ByteContainer	x

 

Fields inherited from class com.licel.jcardsim.crypto.DSAKeyImpl
g, isPrivate, p, q

 

Fields inherited from class com.licel.jcardsim.crypto.KeyImpl
size, type

 

Constructor Summary
DSAPrivateKeyImpl(org.bouncycastle.crypto.params.DSAPrivateKeyParameters params)           Construct and initialize dsa key with DSAPrivateKeyParameters.
DSAPrivateKeyImpl(short keySize)           Construct not-initialized dsa private key

 

Method Summary
void	clearKey()           Clears the key and sets its initialized state to false.
org.bouncycastle.crypto.CipherParameters	getParameters()           Get DSAKeyParameters
short	getX(byte[] buffer, short offset)           Returns the value of the key in plain text.
boolean	isInitialized()           Reports the initialized state of the key.
void	setX(byte[] buffer, short offset, short length)           Sets the value of the key.

 

Methods inherited from class com.licel.jcardsim.crypto.DSAKeyImpl
getG, getKeyGenerationParameters, getP, getQ, setG, setP, setQ

 

Methods inherited from class com.licel.jcardsim.crypto.KeyImpl
getSize, getType

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface javacard.security.Key
getSize, getType

 

Methods inherited from interface javacard.security.DSAKey
getG, getP, getQ, setG, setP, setQ

 

Field Detail

x

protected ByteContainer x

Constructor Detail

DSAPrivateKeyImpl

public DSAPrivateKeyImpl(short keySize)

Construct not-initialized dsa private key

Parameters:

size - key size it bits

See Also:

KeyBuilder

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DSAPrivateKeyImpl

public DSAPrivateKeyImpl(org.bouncycastle.crypto.params.DSAPrivateKeyParameters params)

Construct and initialize dsa key with DSAPrivateKeyParameters. Use in KeyPairImpl

Parameters:

params - key params from BouncyCastle API

See Also:

KeyPair, DSAPrivateKeyParameters

Method Detail

setX

public void setX(byte[] buffer,
                 short offset,
                 short length)
          throws CryptoException

Description copied from interface: DSAPrivateKey

Sets the value of the key. When the base, prime and subprime parameters are initialized and the key value is set, the key is ready for use. The plain text data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte). Input key data is copied into the internal representation.

Note:

• If the key object implements the javacardx.crypto.KeyEncryption interface and the Cipher object specified via setKeyCipher() is not null, the key value is decrypted using the Cipher object.

Specified by:

setX in interface DSAPrivateKey

Parameters:

buffer - the input buffer

offset - the offset into the input buffer at which the modulus value begins

length - the length of the modulus

Throws:

CryptoException - with the following reason code:

• CryptoException.ILLEGAL_VALUE if the input key data length is inconsistent with the implementation or if input data decryption is required and fails.

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getX

public short getX(byte[] buffer,
                  short offset)

Description copied from interface: DSAPrivateKey

Returns the value of the key in plain text. The data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte).

Specified by:

getX in interface DSAPrivateKey

Parameters:

buffer - the output buffer

offset - the offset into the output buffer at which the key value starts

Returns:

the byte length of the key value returned

See Also:

Key

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isInitialized

public boolean isInitialized()

Description copied from interface: Key

Reports the initialized state of the key. Keys must be initialized before being used.

A Key object sets its initialized state to true only when all the associated Key object parameters have been set at least once since the time the initialized state was set to false.

A newly created Key object sets its initialized state to false. Invocation of the clearKey() method sets the initialized state to false. A key with transient key data sets its initialized state to false on the associated clear events.

Specified by:

isInitialized in interface Key

Overrides:

isInitialized in class DSAKeyImpl

Returns:

true if the key has been initialized

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clearKey

public void clearKey()

Description copied from interface: Key

Clears the key and sets its initialized state to false.

Specified by:

clearKey in interface Key

Overrides:

clearKey in class DSAKeyImpl

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getParameters

public org.bouncycastle.crypto.CipherParameters getParameters()

Description copied from class: DSAKeyImpl

Get DSAKeyParameters

Specified by:

getParameters in interface KeyWithParameters

Overrides:

getParameters in class DSAKeyImpl

Returns:

parameters for use with BouncyCastle API

See Also:

DSAKeyParameters

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