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Bouncy Castle Cryptography 1.45 | ||||||||
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java.lang.Objectorg.bouncycastle.crypto.encodings.ISO9796d1Encoding
public class ISO9796d1Encoding
ISO 9796-1 padding. Note in the light of recent results you should only use this with RSA (rather than the "simpler" Rabin keys) and you should never use it with anything other than a hash (ie. even if the message is small don't sign the message, sign it's hash) or some "random" value. See your favorite search engine for details.
| Constructor Summary | |
|---|---|
ISO9796d1Encoding(AsymmetricBlockCipher cipher)
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| Method Summary | |
|---|---|
int |
getInputBlockSize()
return the input block size. |
int |
getOutputBlockSize()
return the maximum possible size for the output. |
int |
getPadBits()
retrieve the number of pad bits in the last decoded message. |
AsymmetricBlockCipher |
getUnderlyingCipher()
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void |
init(boolean forEncryption,
CipherParameters param)
initialise the cipher. |
byte[] |
processBlock(byte[] in,
int inOff,
int inLen)
process the block of len bytes stored in in from offset inOff. |
void |
setPadBits(int padBits)
set the number of bits in the next message to be treated as pad bits. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public ISO9796d1Encoding(AsymmetricBlockCipher cipher)
| Method Detail |
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public AsymmetricBlockCipher getUnderlyingCipher()
public void init(boolean forEncryption,
CipherParameters param)
AsymmetricBlockCipher
init in interface AsymmetricBlockCipherforEncryption - if true the cipher is initialised for
encryption, if false for decryption.param - the key and other data required by the cipher.public int getInputBlockSize()
getInputBlockSize in interface AsymmetricBlockCipherpublic int getOutputBlockSize()
getOutputBlockSize in interface AsymmetricBlockCipherpublic void setPadBits(int padBits)
public int getPadBits()
public byte[] processBlock(byte[] in,
int inOff,
int inLen)
throws InvalidCipherTextException
AsymmetricBlockCipher
processBlock in interface AsymmetricBlockCipherin - the input datainOff - offset into the in array where the data startsinLen - the length of the block to be processed.
InvalidCipherTextException - data decrypts improperly.
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