Class MGF1BytesGenerator
- java.lang.Object
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- org.gudy.bouncycastle.crypto.generators.MGF1BytesGenerator
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- All Implemented Interfaces:
DerivationFunction
public class MGF1BytesGenerator extends java.lang.Object implements DerivationFunction
Generator for MGF1 as defined in PKCS 1v2
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Constructor Summary
Constructors Constructor Description MGF1BytesGenerator(Digest digest)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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.
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Field Detail
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digest
private Digest digest
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seed
private byte[] seed
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hLen
private int hLen
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Constructor Detail
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MGF1BytesGenerator
public MGF1BytesGenerator(Digest digest)
- Parameters:
digest
- the digest to be used as the source of generated bytes
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Method Detail
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init
public void init(DerivationParameters param)
- Specified by:
init
in interfaceDerivationFunction
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getDigest
public Digest getDigest()
return the underlying digest.- Specified by:
getDigest
in interfaceDerivationFunction
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ItoOSP
private void ItoOSP(int i, byte[] sp)
int to octet string.
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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 interfaceDerivationFunction
- Throws:
java.lang.IllegalArgumentException
- if the size of the request will cause an overflow.DataLengthException
- if the out buffer is too small.
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