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com.licel.jcardsim.crypto
Class DSAKeyImpl

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

All Implemented Interfaces:

KeyWithParameters, DSAKey, Key

Direct Known Subclasses:

DSAPrivateKeyImpl, DSAPublicKeyImpl

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public class DSAKeyImpl
extends KeyImpl
implements DSAKey

Base class for DSAPublicKeyImpl/DSAPrivateKeyImpl on BouncyCastle CryptoAPI

See Also:

DSAKey

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Field Summary
protected  ByteContainer	g
protected  boolean	isPrivate
protected  ByteContainer	p
protected  ByteContainer	q

 

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

 

Constructor Summary
DSAKeyImpl(byte keyType, short size)           Construct not-initialized dsa key
DSAKeyImpl(org.bouncycastle.crypto.params.DSAKeyParameters params)           Construct and initialize dsa key with DSAKeyParameters.

 

Method Summary
void	clearKey()           Clears the key and sets its initialized state to false.
short	getG(byte[] buffer, short offset)           Returns the base parameter value of the key in plain text.
org.bouncycastle.crypto.KeyGenerationParameters	getKeyGenerationParameters(SecureRandom rnd)           Get DSAKeyGenerationParameters
short	getP(byte[] buffer, short offset)           Returns the prime parameter value of the key in plain text.
org.bouncycastle.crypto.CipherParameters	getParameters()           Get DSAKeyParameters
short	getQ(byte[] buffer, short offset)           Returns the subprime parameter value of the key in plain text.
boolean	isInitialized()           Reports the initialized state of the key.
void	setG(byte[] buffer, short offset, short length)           Sets the base parameter value of the key.
void	setP(byte[] buffer, short offset, short length)           Sets the prime parameter value of the key.
void	setQ(byte[] buffer, short offset, short length)           Sets the subprime parameter value of the key.

 

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

 

Field Detail

p

protected ByteContainer p

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q

protected ByteContainer q

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g

protected ByteContainer g

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isPrivate

protected boolean isPrivate

Constructor Detail

DSAKeyImpl

public DSAKeyImpl(byte keyType,
                  short size)

Construct not-initialized dsa key

Parameters:

keyType - - key type

keySize - - key size in bits

See Also:

KeyPair, KeyBuilder

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DSAKeyImpl

public DSAKeyImpl(org.bouncycastle.crypto.params.DSAKeyParameters params)

Construct and initialize dsa key with DSAKeyParameters. Use in KeyPairImpl

See Also:

KeyPair, DSAKeyParameters

Method Detail

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

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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

Returns:

true if the key has been initialized

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setP

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

Description copied from interface: DSAKey

Sets the prime parameter value of the key. The plain text data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte). Input prime parameter 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 prime parameter value is decrypted using the Cipher object.

Specified by:

setP in interface DSAKey

Parameters:

buffer - the input buffer

offset - the offset into the input buffer at which the prime parameter value begins

length - the length of the prime parameter value

Throws:

CryptoException - with the following reason code:

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

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setQ

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

Description copied from interface: DSAKey

Sets the subprime parameter value of the key. The plain text data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte). Input subprime parameter 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 subprime parameter value is decrypted using the Cipher object.

Specified by:

setQ in interface DSAKey

Parameters:

buffer - the input buffer

offset - the offset into the input buffer at which the subprime parameter value begins

length - the length of the subprime parameter value

Throws:

CryptoException - with the following reason code:

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

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setG

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

Description copied from interface: DSAKey

Sets the base parameter value of the key. The plain text data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte). Input base parameter 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 base parameter value is decrypted using the Cipher object.

Specified by:

setG in interface DSAKey

Parameters:

buffer - the input buffer

offset - the offset into the input buffer at which the base parameter value begins

length - the length of the base parameter value

Throws:

CryptoException - with the following reason code:

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

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getP

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

Description copied from interface: DSAKey

Returns the prime parameter 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:

getP in interface DSAKey

Parameters:

buffer - the output buffer

offset - the offset into the output buffer at which the prime parameter value starts

Returns:

the byte length of the prime parameter value returned

See Also:

Key

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getQ

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

Description copied from interface: DSAKey

Returns the subprime parameter 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:

getQ in interface DSAKey

Parameters:

buffer - the output buffer

offset - the offset into the output buffer at which the subprime parameter value begins

Returns:

the byte length of the subprime parameter value returned

See Also:

Key

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getG

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

Description copied from interface: DSAKey

Returns the base parameter 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:

getG in interface DSAKey

Parameters:

buffer - the output buffer

offset - the offset into the output buffer at which the base parameter value begins

Returns:

the byte length of the base parameter value returned

See Also:

Key

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getParameters

public org.bouncycastle.crypto.CipherParameters getParameters()

Get DSAKeyParameters

Specified by:

getParameters in interface KeyWithParameters

Returns:

parameters for use with BouncyCastle API

See Also:

DSAKeyParameters

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getKeyGenerationParameters

public org.bouncycastle.crypto.KeyGenerationParameters getKeyGenerationParameters(SecureRandom rnd)

Get DSAKeyGenerationParameters

Specified by:

getKeyGenerationParameters in interface KeyWithParameters

Parameters:

rnd - Secure Random Generator

Returns:

parameters for use with BouncyCastle API

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