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## 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.

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`

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.

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.

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