BlockCipher

All Known Implementing Classes:

AES, Fog, XTEA
```
public interface BlockCipher
```
A block cipher is a data encryption algorithm that operates on blocks.

Field Summary

Fields
Modifier and Type Field Description

static int ALIGN
Blocks sizes are always multiples of this number.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`decrypt(byte[] bytes, int off, int len)`	Decrypt a number of bytes.
`void`	`encrypt(byte[] bytes, int off, int len)`	Encrypt a number of bytes.
`int`	`getKeyLength()`	Get the length of the key in bytes.
`void`	`setKey(byte[] key)`	Set the encryption key used for encrypting and decrypting.

- Field Detail
  - ALIGN
```
static final int ALIGN
```
    Blocks sizes are always multiples of this number.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - setKey
```
void setKey(byte[] key)
```
    Set the encryption key used for encrypting and decrypting. The key needs to be 16 bytes long.
    
    Parameters:
    
    key - the key
  - encrypt
```
void encrypt(byte[] bytes,
             int off,
             int len)
```
    Encrypt a number of bytes. This is done in-place, that means the bytes are overwritten.
    
    Parameters:
    
    bytes - the byte array
    
    off - the start index
    
    len - the number of bytes to encrypt
  - decrypt
```
void decrypt(byte[] bytes,
             int off,
             int len)
```
    Decrypt a number of bytes. This is done in-place, that means the bytes are overwritten.
    
    Parameters:
    
    bytes - the byte array
    
    off - the start index
    
    len - the number of bytes to decrypt
  - getKeyLength
```
int getKeyLength()
```
    Get the length of the key in bytes.
    
    Returns:
    
    the length of the key