ECPrivateKeyImpl

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com.licel.jcardsim.crypto
Class ECPrivateKeyImpl

java.lang.Object
  extended by com.licel.jcardsim.crypto.KeyImpl
      extended by com.licel.jcardsim.crypto.ECKeyImpl
          extended by com.licel.jcardsim.crypto.ECPrivateKeyImpl
All Implemented Interfaces:
KeyWithParameters, ECKey, ECPrivateKey, Key, PrivateKey
public class ECPrivateKeyImpl
extends ECKeyImpl
implements ECPrivateKey

Implementation ECPrivateKey based on BouncyCastle CryptoAPI

See Also:
ECPrivateKey, ECPrivateKeyParameters

Field Summary
protected  ByteContainer s
           
 
Fields inherited from class com.licel.jcardsim.crypto.ECKeyImpl
a, b, e1, e2, e3, fp, g, isKInitialized, k, r
 
Fields inherited from class com.licel.jcardsim.crypto.KeyImpl
size, type
 
Constructor Summary
ECPrivateKeyImpl(byte keyType, short keySize)
          Construct not-initialized ecc private key
ECPrivateKeyImpl(org.bouncycastle.crypto.params.ECPrivateKeyParameters params)
          Construct and initialize ecc key with ECPrivateKeyParameters.
 
Method Summary
 void clearKey()
          Clears the key and sets its initialized state to false.
 org.bouncycastle.crypto.CipherParameters getParameters()
          Get ECPrivateKeyParameters
 short getS(byte[] buffer, short offset)
          Returns the value of the secret key in plaintext form.
 boolean isInitialized()
          Reports the initialized state of the key.
 void setS(byte[] buffer, short offset, short length)
          Sets the value of the secret key.
 
Methods inherited from class com.licel.jcardsim.crypto.ECKeyImpl
getA, getB, getDomainParameters, getField, getG, getK, getKeyGenerationParameters, getR, setA, setB, setFieldF2M, setFieldF2M, setFieldFP, setG, setK, setR
 
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.ECKey
getA, getB, getField, getG, getK, getR, setA, setB, setFieldF2M, setFieldF2M, setFieldFP, setG, setK, setR
 

Field Detail

s

protected ByteContainer s
Constructor Detail

ECPrivateKeyImpl

public ECPrivateKeyImpl(byte keyType,
                        short keySize)
Construct not-initialized ecc private key

Parameters:
size - key size it bits
See Also:
KeyBuilder

ECPrivateKeyImpl

public ECPrivateKeyImpl(org.bouncycastle.crypto.params.ECPrivateKeyParameters params)
Construct and initialize ecc key with ECPrivateKeyParameters. Use in KeyPairImpl

Parameters:
params - key params from BouncyCastle API
See Also:
KeyPair, ECPrivateKeyParameters
Method Detail

setS

public void setS(byte[] buffer,
                 short offset,
                 short length)
          throws CryptoException
Description copied from interface: ECPrivateKey
Sets the value of the secret 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 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 key value is decrypted using the Cipher object.

Specified by:
setS in interface ECPrivateKey
Parameters:
buffer - the input buffer
offset - the offset into the input buffer at which the secret value is to begin
length - the byte length of the secret value
Throws:
CryptoException - with the following reason code:
  • CryptoException.ILLEGAL_VALUE if the input key data is inconsistent with the key length or if input data decryption is required and fails.

getS

public short getS(byte[] buffer,
                  short offset)
           throws CryptoException
Description copied from interface: ECPrivateKey
Returns the value of the secret key in plaintext form. The data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte).

Specified by:
getS in interface ECPrivateKey
Parameters:
buffer - the output buffer
offset - the offset into the input buffer at which the secret value is to begin
Returns:
the byte length of the secret value
Throws:
CryptoException - with the following reason code:
  • CryptoException.UNINITIALIZED_KEY if the value of the secret key has not been successfully initialized since the time the initialized state of the key was set to false.
See Also:
Key

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 ECKeyImpl
Returns:
true if the key has been initialized

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 ECKeyImpl

getParameters

public org.bouncycastle.crypto.CipherParameters getParameters()
Get ECPrivateKeyParameters

Specified by:
getParameters in interface KeyWithParameters
Returns:
parameters for use with BouncyCastle API
See Also:
ECPrivateKeyParameters
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