Package org.bouncycastle.crypto.modes
Class PaddedBlockCipher
- java.lang.Object
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- org.bouncycastle.crypto.BufferedBlockCipher
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- org.bouncycastle.crypto.modes.PaddedBlockCipher
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public class PaddedBlockCipher extends BufferedBlockCipher
Deprecated.use org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher instead.A wrapper class that allows block ciphers to be used to process data in a piecemeal fashion with PKCS5/PKCS7 padding. The PaddedBlockCipher outputs a block only when the buffer is full and more data is being added, or on a doFinal (unless the current block in the buffer is a pad block). The padding mechanism used is the one outlined in PKCS5/PKCS7.
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Field Summary
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Fields inherited from class org.bouncycastle.crypto.BufferedBlockCipher
buf, bufOff, cipher, forEncryption, partialBlockOkay, pgpCFB
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Constructor Summary
Constructors Constructor Description PaddedBlockCipher(BlockCipher cipher)
Deprecated.Create a buffered block cipher with, or without, padding.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description int
doFinal(byte[] out, int outOff)
Deprecated.Process the last block in the buffer.int
getOutputSize(int len)
Deprecated.return the size of the output buffer required for an update plus a doFinal with an input of len bytes.int
getUpdateOutputSize(int len)
Deprecated.return the size of the output buffer required for an update an input of len bytes.int
processByte(byte in, byte[] out, int outOff)
Deprecated.process a single byte, producing an output block if neccessary.int
processBytes(byte[] in, int inOff, int len, byte[] out, int outOff)
Deprecated.process an array of bytes, producing output if necessary.-
Methods inherited from class org.bouncycastle.crypto.BufferedBlockCipher
getBlockSize, getUnderlyingCipher, init, reset
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Constructor Detail
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PaddedBlockCipher
public PaddedBlockCipher(BlockCipher cipher)
Deprecated.Create a buffered block cipher with, or without, padding.- Parameters:
cipher
- the underlying block cipher this buffering object wraps.
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Method Detail
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getOutputSize
public int getOutputSize(int len)
Deprecated.return the size of the output buffer required for an update plus a doFinal with an input of len bytes.- Overrides:
getOutputSize
in classBufferedBlockCipher
- Parameters:
len
- the length of the input.- Returns:
- the space required to accommodate a call to update and doFinal with len bytes of input.
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getUpdateOutputSize
public int getUpdateOutputSize(int len)
Deprecated.return the size of the output buffer required for an update an input of len bytes.- Overrides:
getUpdateOutputSize
in classBufferedBlockCipher
- Parameters:
len
- the length of the input.- Returns:
- the space required to accommodate a call to update with len bytes of input.
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processByte
public int processByte(byte in, byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
Deprecated.process a single byte, producing an output block if neccessary.- Overrides:
processByte
in classBufferedBlockCipher
- Parameters:
in
- the input byte.out
- the space for any output that might be produced.outOff
- the offset from which the output will be copied.- Returns:
- the number of output bytes copied to out.
- Throws:
DataLengthException
- if there isn't enough space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.
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processBytes
public int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
Deprecated.process an array of bytes, producing output if necessary.- Overrides:
processBytes
in classBufferedBlockCipher
- Parameters:
in
- the input byte array.inOff
- the offset at which the input data starts.len
- the number of bytes to be copied out of the input array.out
- the space for any output that might be produced.outOff
- the offset from which the output will be copied.- Returns:
- the number of output bytes copied to out.
- Throws:
DataLengthException
- if there isn't enough space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.
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doFinal
public int doFinal(byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException, InvalidCipherTextException
Deprecated.Process the last block in the buffer. If the buffer is currently full and padding needs to be added a call to doFinal will produce 2 * getBlockSize() bytes.- Overrides:
doFinal
in classBufferedBlockCipher
- Parameters:
out
- the array the block currently being held is copied into.outOff
- the offset at which the copying starts.- Returns:
- the number of output bytes copied to out.
- Throws:
DataLengthException
- if there is insufficient space in out for the output or we are decrypting and the input is not block size aligned.java.lang.IllegalStateException
- if the underlying cipher is not initialised.InvalidCipherTextException
- if padding is expected and not found.
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