org.bouncycastle.crypto.generators
Class PKCS5S2ParametersGenerator

java.lang.Object
  org.bouncycastle.crypto.PBEParametersGenerator
      org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator

public class PKCS5S2ParametersGenerator

extends PBEParametersGenerator

Generator for PBE derived keys and ivs as defined by PKCS 5 V2.0 Scheme 2. This generator uses a SHA-1 HMac as the calculation function.

The document this implementation is based on can be found at RSA's PKCS5 Page

Field Summary

Fields inherited from class org.bouncycastle.crypto.PBEParametersGenerator

iterationCount, password, salt

Constructor Summary

PKCS5S2ParametersGenerator()
construct a PKCS5 Scheme 2 Parameters generator.

PKCS5S2ParametersGenerator(Digest digest)

Method Summary

CipherParameters	generateDerivedMacParameters(int keySize) Generate a key parameter for use with a MAC derived from the password, salt, and iteration count we are currently initialised with.
CipherParameters	generateDerivedParameters(int keySize) Generate a key parameter derived from the password, salt, and iteration count we are currently initialised with.
CipherParameters	generateDerivedParameters(int keySize, int ivSize) Generate a key with initialisation vector parameter derived from the password, salt, and iteration count we are currently initialised with.

Methods inherited from class org.bouncycastle.crypto.PBEParametersGenerator

getIterationCount, getPassword, getSalt, init, PKCS12PasswordToBytes, PKCS5PasswordToBytes, PKCS5PasswordToUTF8Bytes

Methods inherited from class java.lang.Object

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

Constructor Detail

PKCS5S2ParametersGenerator

public PKCS5S2ParametersGenerator()

construct a PKCS5 Scheme 2 Parameters generator.

PKCS5S2ParametersGenerator

public PKCS5S2ParametersGenerator(Digest digest)

Method Detail

generateDerivedParameters

public CipherParameters generateDerivedParameters(int keySize)

Generate a key parameter derived from the password, salt, and iteration count we are currently initialised with.

Specified by:

generateDerivedParameters in class PBEParametersGenerator

Parameters:

keySize - the size of the key we want (in bits)

Returns:

a KeyParameter object.

generateDerivedParameters

public CipherParameters generateDerivedParameters(int keySize,
                                                  int ivSize)

Generate a key with initialisation vector parameter derived from the password, salt, and iteration count we are currently initialised with.

Specified by:

generateDerivedParameters in class PBEParametersGenerator

Parameters:

keySize - the size of the key we want (in bits)

ivSize - the size of the iv we want (in bits)

Returns:

a ParametersWithIV object.

generateDerivedMacParameters

public CipherParameters generateDerivedMacParameters(int keySize)

Generate a key parameter for use with a MAC derived from the password, salt, and iteration count we are currently initialised with.

Specified by:

generateDerivedMacParameters in class PBEParametersGenerator

Parameters:

keySize - the size of the key we want (in bits)

Returns:

a KeyParameter object.