Package org.bouncycastle.crypto.engines
Class VMPCEngine
java.lang.Object
org.bouncycastle.crypto.engines.VMPCEngine
- All Implemented Interfaces:
StreamCipher
- Direct Known Subclasses:
VMPCKSA3Engine
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected byte
protected byte[]
protected byte
protected byte[]
protected byte[]
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionReturn the name of the algorithm the cipher implements.void
init
(boolean forEncryption, CipherParameters params) initialise a VMPC cipher.protected void
initKey
(byte[] keyBytes, byte[] ivBytes) int
processBytes
(byte[] in, int inOff, int len, byte[] out, int outOff) process a block of bytes from in putting the result into out.void
reset()
reset the cipher.byte
returnByte
(byte in) encrypt/decrypt a single byte returning the result.
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Field Details
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n
protected byte n -
P
protected byte[] P -
s
protected byte s -
workingIV
protected byte[] workingIV -
workingKey
protected byte[] workingKey
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Constructor Details
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VMPCEngine
public VMPCEngine()
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Method Details
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getAlgorithmName
Description copied from interface:StreamCipher
Return the name of the algorithm the cipher implements.- Specified by:
getAlgorithmName
in interfaceStreamCipher
- Returns:
- the name of the algorithm the cipher implements.
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init
initialise a VMPC cipher.- Specified by:
init
in interfaceStreamCipher
- Parameters:
forEncryption
- whether or not we are for encryption.params
- the parameters required to set up the cipher.- Throws:
IllegalArgumentException
- if the params argument is inappropriate.
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initKey
protected void initKey(byte[] keyBytes, byte[] ivBytes) -
processBytes
public int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) Description copied from interface:StreamCipher
process a block of bytes from in putting the result into out.- Specified by:
processBytes
in interfaceStreamCipher
- Parameters:
in
- the input byte array.inOff
- the offset into the in array where the data to be processed starts.len
- the number of bytes to be processed.out
- the output buffer the processed bytes go into.outOff
- the offset into the output byte array the processed data starts at.- Returns:
- the number of bytes produced - should always be len.
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reset
public void reset()Description copied from interface:StreamCipher
reset the cipher. This leaves it in the same state it was at after the last init (if there was one).- Specified by:
reset
in interfaceStreamCipher
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returnByte
public byte returnByte(byte in) Description copied from interface:StreamCipher
encrypt/decrypt a single byte returning the result.- Specified by:
returnByte
in interfaceStreamCipher
- Parameters:
in
- the byte to be processed.- Returns:
- the result of processing the input byte.
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