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## org.bouncycastle.crypto
Class PBEParametersGenerator

    java.lang.Object
      |
      +--org.bouncycastle.crypto.PBEParametersGenerator

Direct Known Subclasses:
  OpenSSLPBEParametersGenerator, PKCS12ParametersGenerator, PKCS5S1ParametersGenerator, PKCS5S2ParametersGenerator

public abstract class PBEParametersGenerator
extends java.lang.Object

super class for all Password Based Encryption (PBE) parameter generator classes.

Field Summary
`protected int` | `iterationCount`
`protected byte[]` | `password`
`protected byte[]` | `salt`

Constructor Summary
`protected` | `PBEParametersGenerator()` base constructor.

Method Summary
`abstract CipherParameters` | `generateDerivedMacParameters(int keySize)` generate derived parameters for a key of length keySize, specifically for use with a MAC.
`abstract CipherParameters` | `generateDerivedParameters(int keySize)` generate derived parameters for a key of length keySize.
`abstract CipherParameters` | `generateDerivedParameters(int keySize, int ivSize)` generate derived parameters for a key of length keySize, and an initialisation vector (IV) of length ivSize.
`int` | `getIterationCount()` return the iteration count.
`byte[]` | `getPassword()` return the password byte array.
`byte[]` | `getSalt()` return the salt byte array.
`void` | `init(byte[] password, byte[] salt, int iterationCount)` initialise the PBE generator.
`static byte[]` | `PKCS12PasswordToBytes(char[] password)` converts a password to a byte array according to the scheme in PKCS12 (unicode, big endian, 2 zero pad bytes at the end).
`static byte[]` | `PKCS5PasswordToBytes(char[] password)` converts a password to a byte array according to the scheme in PKCS5 (ascii, no padding)

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### password

    protected byte[] password

### salt

    protected byte[] salt

### iterationCount

    protected int iterationCount

Constructor Detail

### PBEParametersGenerator

    protected PBEParametersGenerator()

  base constructor.

Method Detail

### init

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

  initialise the PBE generator.
  Parameters:
    `password` - the password converted into bytes (see below).
    `salt` - the salt to be mixed with the password.
    `iterationCount` - the number of iterations the "mixing" function is to be applied for.

### getPassword

    public byte[] getPassword()

  return the password byte array.
  Returns:
    the password byte array.

### getSalt

    public byte[] getSalt()

  return the salt byte array.
  Returns:
    the salt byte array.

### getIterationCount

    public int getIterationCount()

  return the iteration count.
  Returns:
    the iteration count.

### generateDerivedParameters

    public abstract CipherParameters generateDerivedParameters(int keySize)

  generate derived parameters for a key of length keySize.
  Parameters:
    `keySize` - the length, in bits, of the key required.
  Returns:
    a parameters object representing a key.

### generateDerivedParameters

    public abstract CipherParameters generateDerivedParameters(int keySize,
                                                               int ivSize)

  generate derived parameters for a key of length keySize, and an initialisation vector (IV) of length ivSize.
  Parameters:
    `keySize` - the length, in bits, of the key required.
    `ivSize` - the length, in bits, of the iv required.
  Returns:
    a parameters object representing a key and an IV.

### generateDerivedMacParameters

    public abstract CipherParameters generateDerivedMacParameters(int keySize)

  generate derived parameters for a key of length keySize, specifically for use with a MAC.
  Parameters:
    `keySize` - the length, in bits, of the key required.
  Returns:
    a parameters object representing a key.

### PKCS5PasswordToBytes

    public static byte[] PKCS5PasswordToBytes(char[] password)

  converts a password to a byte array according to the scheme in PKCS5 (ascii, no padding)
  Parameters:
    `password` - a character array reqpresenting the password.
  Returns:
    a byte array representing the password.

### PKCS12PasswordToBytes

    public static byte[] PKCS12PasswordToBytes(char[] password)

  converts a password to a byte array according to the scheme in PKCS12 (unicode, big endian, 2 zero pad bytes at the end).
  Parameters:
    `password` - a character array reqpresenting the password.
  Returns:
    a byte array representing the password.

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