org.bouncycastle.crypto.generators

Class PKCS5S1ParametersGenerator


public class PKCS5S1ParametersGenerator
extends PBEParametersGenerator

Generator for PBE derived keys and ivs as defined by PKCS 5 V2.0 Scheme 1. Note this generator is limited to the size of the hash produced by the digest used to drive it.

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

PKCS5S1ParametersGenerator(Digest digest)
Construct a PKCS 5 Scheme 1 Parameters generator.

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

PKCS12PasswordToBytes, PKCS5PasswordToBytes, generateDerivedMacParameters, generateDerivedParameters, generateDerivedParameters, getIterationCount, getPassword, getSalt, init

Constructor Details

PKCS5S1ParametersGenerator

public PKCS5S1ParametersGenerator(Digest digest)
Construct a PKCS 5 Scheme 1 Parameters generator.

Parameters:
digest - the digest to be used as the source of derived keys.

Method Details

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.
Overrides:
generateDerivedMacParameters in interface PBEParametersGenerator

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

Returns:
a KeyParameter object.


generateDerivedParameters

public CipherParameters generateDerivedParameters(int keySize)
Generate a key parameter derived from the password, salt, and iteration count we are currently initialised with.
Overrides:
generateDerivedParameters in interface 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.
Overrides:
generateDerivedParameters in interface 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.