1 /* GENERATED SOURCE. DO NOT MODIFY. */ 2 package com.android.org.bouncycastle.crypto; 3 4 5 /** 6 * Block cipher engines are expected to conform to this interface. 7 * @hide This class is not part of the Android public SDK API 8 */ 9 public interface BlockCipher 10 { 11 /** 12 * Initialise the cipher. 13 * 14 * @param forEncryption if true the cipher is initialised for 15 * encryption, if false for decryption. 16 * @param params the key and other data required by the cipher. 17 * @exception IllegalArgumentException if the params argument is 18 * inappropriate. 19 */ 20 public void init(boolean forEncryption, CipherParameters params) 21 throws IllegalArgumentException; 22 23 /** 24 * Return the name of the algorithm the cipher implements. 25 * 26 * @return the name of the algorithm the cipher implements. 27 */ 28 public String getAlgorithmName(); 29 30 /** 31 * Return the block size for this cipher (in bytes). 32 * 33 * @return the block size for this cipher in bytes. 34 */ 35 public int getBlockSize(); 36 37 /** 38 * Process one block of input from the array in and write it to 39 * the out array. 40 * 41 * @param in the array containing the input data. 42 * @param inOff offset into the in array the data starts at. 43 * @param out the array the output data will be copied into. 44 * @param outOff the offset into the out array the output will start at. 45 * @exception DataLengthException if there isn't enough data in in, or 46 * space in out. 47 * @exception IllegalStateException if the cipher isn't initialised. 48 * @return the number of bytes processed and produced. 49 */ 50 public int processBlock(byte[] in, int inOff, byte[] out, int outOff) 51 throws DataLengthException, IllegalStateException; 52 53 /** 54 * Reset the cipher. After resetting the cipher is in the same state 55 * as it was after the last init (if there was one). 56 */ 57 public void reset(); 58 } 59
