org.spongycastle.jce.provider

Class BrokenKDF2BytesGenerator

java.lang.Object

org.spongycastle.jce.provider.BrokenKDF2BytesGenerator

All Implemented Interfaces:

org.spongycastle.crypto.DerivationFunction

public class BrokenKDF2BytesGenerator
extends java.lang.Object
implements org.spongycastle.crypto.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

Constructors

Constructor and Description
BrokenKDF2BytesGenerator(org.spongycastle.crypto.Digest digest) Construct a KDF2 Parameters generator.

Method Summary

Modifier and Type	Method and Description
int	generateBytes(byte[] out, int outOff, int len) fill len bytes of the output buffer with bytes generated from the derivation function.
org.spongycastle.crypto.Digest	getDigest() return the underlying digest.
void	init(org.spongycastle.crypto.DerivationParameters param)

Methods inherited from class java.lang.Object

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

Constructor Detail

BrokenKDF2BytesGenerator

public BrokenKDF2BytesGenerator(org.spongycastle.crypto.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.

Parameters:

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

Method Detail

init

public void init(org.spongycastle.crypto.DerivationParameters param)

Specified by:

init in interface org.spongycastle.crypto.DerivationFunction

getDigest

public org.spongycastle.crypto.Digest getDigest()

return the underlying digest.

generateBytes

public int generateBytes(byte[] out,
                         int outOff,
                         int len)
                  throws org.spongycastle.crypto.DataLengthException,
                         java.lang.IllegalArgumentException

fill len bytes of the output buffer with bytes generated from the derivation function.

Specified by:

generateBytes in interface org.spongycastle.crypto.DerivationFunction

Throws:

java.lang.IllegalArgumentException - if the size of the request will cause an overflow.

org.spongycastle.crypto.DataLengthException - if the out buffer is too small.