org.bouncycastle.crypto.generators
Class MGF1BytesGenerator
java.lang.Object
org.bouncycastle.crypto.generators.MGF1BytesGenerator
- All Implemented Interfaces:
- DerivationFunction
public class MGF1BytesGenerator
- extends java.lang.Object
- implements DerivationFunction
Generator for MGF1 as defined in PKCS 1v2
Method Summary |
int |
generateBytes(byte[] out,
int outOff,
int len)
fill len bytes of the output buffer with bytes generated from
the derivation function. |
Digest |
getDigest()
return the underlying digest. |
void |
init(DerivationParameters param)
|
private void |
ItoOSP(int i,
byte[] sp)
int to octet string. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
digest
private Digest digest
seed
private byte[] seed
hLen
private int hLen
MGF1BytesGenerator
public MGF1BytesGenerator(Digest digest)
- Parameters:
digest
- the digest to be used as the source of generated bytes
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
ItoOSP
private void ItoOSP(int i,
byte[] sp)
- int to octet string.
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:
DataLengthException
- if the out buffer is too small.
java.lang.IllegalArgumentException