Package org.gudy.bouncycastle.crypto
Interface StreamCipher
- All Known Implementing Classes:
RC4Engine
,StreamBlockCipher
public interface StreamCipher
the interface stream ciphers conform to.
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Method Summary
Modifier and TypeMethodDescriptionReturn the name of the algorithm the cipher implements.void
init
(boolean forEncryption, CipherParameters params) Initialise the cipher.void
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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Method Details
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init
Initialise the cipher.- Parameters:
forEncryption
- if true the cipher is initialised for encryption, if false for decryption.param
- the key and other data required by the cipher.- Throws:
IllegalArgumentException
- if the params argument is inappropriate.
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getAlgorithmName
String getAlgorithmName()Return the name of the algorithm the cipher implements.- Returns:
- the name of the algorithm the cipher implements.
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returnByte
byte returnByte(byte in) encrypt/decrypt a single byte returning the result.- Parameters:
in
- the byte to be processed.- Returns:
- the result of processing the input byte.
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processBytes
process a block of bytes from in putting the result into out.- 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 stars at.- Throws:
DataLengthException
- if the output buffer is too small.
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reset
void reset()reset the cipher. This leaves it in the same state it was at after the last init (if there was one).
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