Class BaseKDFBytesGenerator
java.lang.Object
org.bouncycastle.crypto.generators.BaseKDFBytesGenerator
- All Implemented Interfaces:
DerivationFunction
,DigestDerivationFunction
- Direct Known Subclasses:
KDF1BytesGenerator
,KDF2BytesGenerator
Basic KDF generator for derived keys and ivs as defined by IEEE P1363a/ISO
18033
This implementation is based on ISO 18033/P1363a.
This implementation is based on ISO 18033/P1363a.
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Constructor Summary
ConstructorsModifierConstructorDescriptionprotected
BaseKDFBytesGenerator
(int counterStart, Digest digest) Construct a KDF Parameters generator. -
Method Summary
Modifier and TypeMethodDescriptionint
generateBytes
(byte[] out, int outOff, int len) fill len bytes of the output buffer with bytes generated from the derivation function.return the underlying digest.void
init
(DerivationParameters param)
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Constructor Details
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BaseKDFBytesGenerator
Construct a KDF Parameters generator.- Parameters:
counterStart
- value of counter.digest
- the digest to be used as the source of derived keys.
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Method Details
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init
- Specified by:
init
in interfaceDerivationFunction
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getDigest
return the underlying digest.- Specified by:
getDigest
in interfaceDigestDerivationFunction
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generateBytes
public int generateBytes(byte[] out, int outOff, int len) throws DataLengthException, IllegalArgumentException fill len bytes of the output buffer with bytes generated from the derivation function.- Specified by:
generateBytes
in interfaceDerivationFunction
- Throws:
IllegalArgumentException
- if the size of the request will cause an overflow.DataLengthException
- if the out buffer is too small.
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