Package org.bouncycastle.tls.crypto.impl
Interface TlsBlockCipherImpl
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- All Known Implementing Classes:
JceBlockCipherImpl
,JceBlockCipherWithCBCImplicitIVImpl
public interface TlsBlockCipherImpl
Interface for block cipher services.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description int
doFinal(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)
Perform the cipher encryption/decryption returning the output in output.int
getBlockSize()
Return the blocksize (in bytes) of the underlying block cipher.void
init(byte[] iv, int ivOff, int ivLen)
Initialise the parameters for operator.void
setKey(byte[] key, int keyOff, int keyLen)
Set the key to be used by the block cipher implementation supporting this service.
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Method Detail
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setKey
void setKey(byte[] key, int keyOff, int keyLen) throws java.io.IOException
Set the key to be used by the block cipher implementation supporting this service.- Parameters:
key
- array holding the block cipher key.keyOff
- offset into the array the key starts at.keyLen
- length of the key in the array.- Throws:
java.io.IOException
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init
void init(byte[] iv, int ivOff, int ivLen) throws java.io.IOException
Initialise the parameters for operator.- Parameters:
iv
- array holding the initialization vector (IV).ivOff
- offset into the array the IV starts at.ivLen
- length of the IV in the array.- Throws:
java.io.IOException
- if the parameters are inappropriate.
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doFinal
int doFinal(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset) throws java.io.IOException
Perform the cipher encryption/decryption returning the output in output.Note: we have to use doFinal() here as it is the only way to guarantee output from the underlying cipher.
- Parameters:
input
- array holding input data to the cipher.inputOffset
- offset into input array data starts at.inputLength
- length of the input data in the array.output
- array to hold the cipher output.outputOffset
- offset into output array to start saving output.- Returns:
- the amount of data written to output.
- Throws:
java.io.IOException
- in case of failure.
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getBlockSize
int getBlockSize()
Return the blocksize (in bytes) of the underlying block cipher.- Returns:
- the cipher's blocksize.
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