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java.lang.Object | +--gnu.crypto.mode.BaseMode | +--gnu.crypto.mode.ECB
The implementation of the Electronic Codebook mode.
The Electronic Codebook (ECB) mode is a confidentiality mode that is defined as follows:
In ECB encryption, the forward cipher function is applied directly, and independently, to each block of the plaintext. The resulting sequence of output blocks is the ciphertext.
In ECB decryption, the inverse cipher function is applied directly, and independently, to each block of the ciphertext. The resulting sequence of output blocks is the plaintext.
References:
Fields inherited from class gnu.crypto.mode.BaseMode |
cipher, cipherBlockSize, iv, lock, modeBlockSize, name, state |
Fields inherited from interface gnu.crypto.mode.IMode |
DECRYPTION, ENCRYPTION, IV, MODE_BLOCK_SIZE, STATE |
Fields inherited from interface gnu.crypto.cipher.IBlockCipher |
CIPHER_BLOCK_SIZE, KEY_MATERIAL |
Constructor Summary | |
(package private) |
ECB(IBlockCipher underlyingCipher,
int cipherBlockSize)
Trivial package-private constructor for use by the Factory class. |
Method Summary | |
java.lang.Object |
clone()
Returns a clone of this instance. |
void |
decryptBlock(byte[] in,
int i,
byte[] out,
int o)
Decrypts exactly one block of ciphertext. |
void |
encryptBlock(byte[] in,
int i,
byte[] out,
int o)
Encrypts exactly one block of plaintext. |
void |
setup()
The initialisation phase of the concrete mode implementation. |
void |
teardown()
The termination phase of the concrete mode implementation. |
Methods inherited from class gnu.crypto.mode.BaseMode |
blockSizes, currentBlockSize, defaultBlockSize, defaultKeySize, init, keySizes, name, reset, selfTest, update |
Methods inherited from class java.lang.Object |
|
Constructor Detail |
ECB(IBlockCipher underlyingCipher, int cipherBlockSize)
Trivial package-private constructor for use by the Factory class.
underlyingCipher
- the underlying cipher implementation.cipherBlockSize
- the underlying cipher block size to use.Method Detail |
public java.lang.Object clone()
IBlockCipher
Returns a clone of this instance.
clone
in class BaseMode
gnu.crypto.cipher.IBlockCipher
public void setup()
BaseMode
setup
in class BaseMode
public void teardown()
BaseMode
teardown
in class BaseMode
public void encryptBlock(byte[] in, int i, byte[] out, int o)
IBlockCipher
Encrypts exactly one block of plaintext.
encryptBlock
in class BaseMode
gnu.crypto.cipher.IBlockCipher
in
- the plaintext.inOffset
- index of in
from which to start considering
data.out
- the ciphertext.outOffset
- index of out
from which to store result.java.lang.IllegalStateException
- if the instance is not initialised.public void decryptBlock(byte[] in, int i, byte[] out, int o)
IBlockCipher
Decrypts exactly one block of ciphertext.
decryptBlock
in class BaseMode
gnu.crypto.cipher.IBlockCipher
in
- the plaintext.inOffset
- index of in
from which to start considering
data.out
- the ciphertext.outOffset
- index of out
from which to store result.java.lang.IllegalStateException
- if the instance is not initialised.
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For the latest news and information visit The GNU Crypto project |
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