org.gudy.bouncycastle.crypto.generators
Class OpenSSLPBEParametersGenerator

java.lang.Object
  org.gudy.bouncycastle.crypto.PBEParametersGenerator
      org.gudy.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator

public class OpenSSLPBEParametersGenerator
extends PBEParametersGenerator

Generator for PBE derived keys and ivs as usd by OpenSSL.

The scheme is a simple extension of PKCS 5 V2.0 Scheme 1 using MD5 with an iteration count of 1.

Field Summary

Fields inherited from class org.gudy.bouncycastle.crypto.PBEParametersGenerator

iterationCount, password, salt

Constructor Summary

OpenSSLPBEParametersGenerator()
Construct a OpenSSL 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.
void	init(byte[] password, byte[] salt) Initialise - note the iteration count for this algorithm is fixed at 1.

Methods inherited from class org.gudy.bouncycastle.crypto.PBEParametersGenerator

getIterationCount, getPassword, getSalt, init, PKCS12PasswordToBytes, PKCS5PasswordToBytes

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenSSLPBEParametersGenerator

public OpenSSLPBEParametersGenerator()

Construct a OpenSSL Parameters generator.

Method Detail

init

public void init(byte[] password,
                 byte[] salt)

Initialise - note the iteration count for this algorithm is fixed at 1.

Parameters:

password - password to use.

salt - salt to use.

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.

Throws:

java.lang.IllegalArgumentException - if the key length larger than the base hash size.

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.

Throws:

java.lang.IllegalArgumentException - if keySize + ivSize is larger than the base hash size.

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.

Throws:

java.lang.IllegalArgumentException - if the key length larger than the base hash size.