org.bouncycastle.crypto.generators
Class BaseKDFBytesGenerator
java.lang.Object
org.bouncycastle.crypto.generators.BaseKDFBytesGenerator
- All Implemented Interfaces:
- DerivationFunction
- Direct Known Subclasses:
- KDF1BytesGenerator, KDF2BytesGenerator
public class BaseKDFBytesGenerator
- extends java.lang.Object
- implements DerivationFunction
Basic KDF generator for derived keys and ivs as defined by IEEE P1363a/ISO 18033
This implementation is based on ISO 18033/P1363a.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
counterStart
private int counterStart
digest
private Digest digest
shared
private byte[] shared
iv
private byte[] iv
BaseKDFBytesGenerator
protected BaseKDFBytesGenerator(int counterStart,
Digest digest)
- Construct a KDF Parameters generator.
- Parameters:
counterStart
- value of counter.digest
- the digest to be used as the source of derived keys.
init
public void init(DerivationParameters param)
- Specified by:
init
in interface DerivationFunction
getDigest
public Digest getDigest()
- return the underlying digest.
- Specified by:
getDigest
in interface DerivationFunction
generateBytes
public int generateBytes(byte[] out,
int outOff,
int len)
throws DataLengthException,
java.lang.IllegalArgumentException
- fill len bytes of the output buffer with bytes generated from
the derivation function.
- Specified by:
generateBytes
in interface DerivationFunction
- Throws:
java.lang.IllegalArgumentException
- if the size of the request will cause an overflow.
DataLengthException
- if the out buffer is too small.