org.bouncycastle.crypto.paddings
Interface BlockCipherPadding
- ISO10126d2Padding, ISO7816d4Padding, PKCS7Padding, TBCPadding, X923Padding, ZeroBytePadding
public interface BlockCipherPadding
Block cipher padders are expected to conform to this interface
int | addPadding(byte[] in, int inOff) - add the pad bytes to the passed in block, returning the
number of bytes added.
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String | getPaddingName() - Return the name of the algorithm the cipher implements.
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void | init(SecureRandom random) - Initialise the padder.
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int | padCount(byte[] in) - return the number of pad bytes present in the block.
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addPadding
public int addPadding(byte[] in,
int inOff)
add the pad bytes to the passed in block, returning the
number of bytes added.
Note: this assumes that the last block of plain text is always
passed to it inside in. i.e. if inOff is zero, indicating the
entire block is to be overwritten with padding the value of in
should be the same as the last block of plain text. The reason
for this is that some modes such as "trailing bit compliment"
base the padding on the last byte of plain text.
getPaddingName
public String getPaddingName()
Return the name of the algorithm the cipher implements.
- the name of the algorithm the cipher implements.
init
public void init(SecureRandom random)
throws IllegalArgumentException
Initialise the padder.
random
- the source of randomness for the padding, if required.