Bouncy Castle Provider 1.77 · org.bouncycastle.crypto.modes.PaddedBlockCipher

Access	Constructor and Description
public	PaddedBlockCipher(BlockCipher the underlying block cipher this buffering object wraps. cipher) Create a buffered block cipher with, or without, padding.

Method Summary

Modifier and Type	Method and Description
public int	doFinal(byte[] the array the block currently being held is copied into. out, int the offset at which the copying starts. outOff) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.doFinal. Process the last block in the buffer.
public int	Returns: the space required to accommodate a call to update and doFinal with len bytes of input. getOutputSize(int the length of the input. len) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.getOutputSize. return the size of the output buffer required for an update plus a doFinal with an input of len bytes.
public int	Returns: the space required to accommodate a call to update with len bytes of input. getUpdateOutputSize(int the length of the input. len) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.getUpdateOutputSize. return the size of the output buffer required for an update an input of len bytes.
public int	processByte(byte the input byte. in, byte[] the space for any output that might be produced. out, int the offset from which the output will be copied. outOff) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.processByte. process a single byte, producing an output block if neccessary.
public int	processBytes(byte[] the input byte array. in, int the offset at which the input data starts. inOff, int the number of bytes to be copied out of the input array. len, byte[] the space for any output that might be produced. out, int the offset from which the output will be copied. outOff) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.processBytes. process an array of bytes, producing output if necessary.

Inherited from org.bouncycastle.crypto.DefaultBufferedBlockCipher:: getBlockSize getUnderlyingCipher init reset

PaddedBlockCipher	back to summary
public PaddedBlockCipher(BlockCipher cipher) Create a buffered block cipher with, or without, padding. Parameters cipher:BlockCipher the underlying block cipher this buffering object wraps.

Method Detail

doFinal	back to summary
public int doFinal(byte[] out, int outOff) throws DataLengthException, IllegalStateException, InvalidCipherTextException Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.doFinal. 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. Parameters out:byte[] the array the block currently being held is copied into. outOff:int the offset at which the copying starts. Returns:int Doc from org.bouncycastle.crypto.DefaultBufferedBlockCipher.doFinal. the number of output bytes copied to out. Exceptions DataLengthException: if there is insufficient space in out for the output or we are decrypting and the input is not block size aligned. IllegalStateException: if the underlying cipher is not initialised. InvalidCipherTextException: if padding is expected and not found.

doFinal

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public int doFinal(byte[] out, int outOff) throws DataLengthException, IllegalStateException, InvalidCipherTextException

Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.doFinal.

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.

Parameters

out:byte[]: the array the block currently being held is copied into.
outOff:int: the offset at which the copying starts.

Returns:int

Doc from org.bouncycastle.crypto.DefaultBufferedBlockCipher.doFinal.

the number of output bytes copied to out.

Exceptions

DataLengthException:: if there is insufficient space in out for the output or we are decrypting and the input is not block size aligned.
IllegalStateException:: if the underlying cipher is not initialised.
InvalidCipherTextException:: if padding is expected and not found.

getOutputSize	back to summary
public int getOutputSize(int len) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.getOutputSize. return the size of the output buffer required for an update plus a doFinal with an input of len bytes. Parameters len:int the length of the input. Returns:int the space required to accommodate a call to update and doFinal with len bytes of input.

getOutputSize

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public int getOutputSize(int len)

Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.getOutputSize.

return the size of the output buffer required for an update plus a doFinal with an input of len bytes.

Parameters

len:int: the length of the input.

Returns:int

the space required to accommodate a call to update and doFinal with len bytes of input.

getUpdateOutputSize	back to summary
public int getUpdateOutputSize(int len) Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.getUpdateOutputSize. return the size of the output buffer required for an update an input of len bytes. Parameters len:int the length of the input. Returns:int the space required to accommodate a call to update with len bytes of input.

getUpdateOutputSize

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public int getUpdateOutputSize(int len)

Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.getUpdateOutputSize.

return the size of the output buffer required for an update an input of len bytes.

Parameters

len:int: the length of the input.

Returns:int

the space required to accommodate a call to update with len bytes of input.

processByte	back to summary
public int processByte(byte in, byte[] out, int outOff) throws DataLengthException, IllegalStateException Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.processByte. process a single byte, producing an output block if neccessary. Parameters in:byte the input byte. out:byte[] the space for any output that might be produced. outOff:int the offset from which the output will be copied. Returns:int Doc from org.bouncycastle.crypto.DefaultBufferedBlockCipher.processByte. the number of output bytes copied to out. Exceptions DataLengthException: if there isn't enough space in out. IllegalStateException: if the cipher isn't initialised.

processByte

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public int processByte(byte in, byte[] out, int outOff) throws DataLengthException, IllegalStateException

Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.processByte.

process a single byte, producing an output block if neccessary.

Parameters

in:byte: the input byte.
out:byte[]: the space for any output that might be produced.
outOff:int: the offset from which the output will be copied.

Returns:int

Doc from org.bouncycastle.crypto.DefaultBufferedBlockCipher.processByte.

the number of output bytes copied to out.

Exceptions

DataLengthException:: if there isn't enough space in out.
IllegalStateException:: if the cipher isn't initialised.

processBytes	back to summary
public int processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) throws DataLengthException, IllegalStateException Overrides org.bouncycastle.crypto.DefaultBufferedBlockCipher.processBytes. process an array of bytes, producing output if necessary. Parameters in:byte[] the input byte array. inOff:int the offset at which the input data starts. len:int the number of bytes to be copied out of the input array. out:byte[] the space for any output that might be produced. outOff:int the offset from which the output will be copied. Returns:int Doc from org.bouncycastle.crypto.DefaultBufferedBlockCipher.processBytes. the number of output bytes copied to out. Exceptions DataLengthException: if there isn't enough space in out. IllegalStateException: if the cipher isn't initialised.

processBytes

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