Bouncy Castle Cryptography 1.11 API Specification: Class KDF2BytesGenerator
Bouncy Castle Cryptography 1.11

Class KDF2BytesGenerator

All Implemented Interfaces:

public class KDF2BytesGenerator
extends java.lang.Object
implements DerivationFunction

Generator for PBE derived keys and ivs as defined by IEEE P1363a

This implementation is based on draft 9 of IEEE P1363a. Note: as this is still a draft the output of this generator may change, don't use it for anything that might be subject to long term storage.

Constructor Summary
KDF2BytesGenerator(Digest digest)
          Construct a KDF2 Parameters generator.
Method Summary
 int generateBytes(byte[] out, int outOff, int len)
          fill len bytes of the output buffer with bytes generated from the derivation function.
 void init(DerivationParameters param)
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public KDF2BytesGenerator(Digest digest)
Construct a KDF2 Parameters generator. Generates key material according to IEEE P1363a - if you want orthodox results you should use a digest specified in the standard.

Note: IEEE P1363a standard is still a draft standard, if the standard changes this function, the output of this function will change as well. Don't use this routine for anything subject to long term storage.

digest - the digest to be used as the source of derived keys.
Method Detail


public void init(DerivationParameters param)
Specified by:
init in interface DerivationFunction


public int generateBytes(byte[] out,
                         int outOff,
                         int len)
                  throws DataLengthException,
fill len bytes of the output buffer with bytes generated from the derivation function.
Specified by:
generateBytes in interface DerivationFunction
java.lang.IllegalArgumentException - if the size of the request will cause an overflow.
DataLengthException - if the out buffer is too small.

Bouncy Castle Cryptography 1.11