org.logi.crypto.modes
Class DecryptECB
java.lang.Object
|
+--org.logi.crypto.Crypto
|
+--org.logi.crypto.modes.DecryptMode
|
+--org.logi.crypto.modes.DecryptECB
- public class DecryptECB
- extends DecryptMode
Use this class to decrypt ciphertext generated by EncryptECB.
If you are using symmetric keys, the DecryptECB object must be
initialized with the same key as the EncryptECB object it is
decrypting data from. If you are using asymetric keys, the DecryptECB
object must be initialized with the other key from the key-pair.
- Author:
- Logi Ragnarsson
(logir@logi.org)
- See Also:
EncryptECB
Fields inherited from class org.logi.crypto.Crypto |
BIT,
cdsPath,
EMPTY_ARRAY,
FOUR,
keySource,
NIBBLE,
ONE,
primeCertainty,
random,
TWO,
ZERO |
Constructor Summary |
DecryptECB()
Create a new ECB-mode decrypt session with no key. |
DecryptECB(CipherKey key)
Create a new ECB-mode decrypt session with the specified key. |
Method Summary |
byte[] |
decrypt(byte[] source,
int i,
int length)
Send bytes to the DecryptECB object for decryption. |
CipherKey |
getKey()
Return the key used for decryption. |
int |
plainBlockSize()
Return the size of the blocks of plaintext output by this object. |
void |
setKey(CipherKey key)
Set the key to use for decryption. |
Methods inherited from class org.logi.crypto.Crypto |
binString,
binString,
equal,
equalRelaxed,
equalSub,
fromHexNibble,
fromHexString,
fromString,
fromString,
hexString,
hexString,
hexString,
hexString,
hexString,
initRandom,
initRandom,
makeClass,
makeInt,
makeLong,
makeSessionKey,
pastSpace,
pickBits,
pickBits,
readInt,
writeBytes,
writeBytes,
writeInt |
Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
DecryptECB
public DecryptECB(CipherKey key)
- Create a new ECB-mode decrypt session with the specified key.
DecryptECB
public DecryptECB()
- Create a new ECB-mode decrypt session with no key. No decryption
can be performed until a call to
setKey()
has been
made.
getKey
public CipherKey getKey()
- Return the key used for decryption.
- Overrides:
- getKey in class DecryptMode
setKey
public void setKey(CipherKey key)
- Set the key to use for decryption. Do not call this method when
there may be data in the internal buffer.
- Overrides:
- setKey in class DecryptMode
plainBlockSize
public int plainBlockSize()
- Return the size of the blocks of plaintext output by this object.
- Overrides:
- plainBlockSize in class DecryptMode
decrypt
public byte[] decrypt(byte[] source,
int i,
int length)
- Send bytes to the DecryptECB object for decryption.
Decrypt length
bytes from source
,
starting at i
and return the plaintext. Data may
be encrypted in blocks in which case only whole blocks of
plaintext are written to dest
. Any remaining data
will be stored and prepended to source
in the next
call to decrypt
.
- Overrides:
- decrypt in class DecryptMode
Copyright 1997-2000 Logi Ragnarsson