reorganized file layout (part 1: moves and renames)

[org.ibex.core.git] / src / org / bouncycastle / crypto / engines / RC4Engine.java

diff --git a/src/org/bouncycastle/crypto/engines/RC4Engine.java b/src/org/bouncycastle/crypto/engines/RC4Engine.java
deleted file mode 100644 (file)
index 0adc923..0000000
--- a/src/org/bouncycastle/crypto/engines/RC4Engine.java
+++ /dev/null
@@ -1,144 +0,0 @@
-package org.bouncycastle.crypto.engines;\r
-\r
-import org.bouncycastle.crypto.StreamCipher;\r
-import org.bouncycastle.crypto.CipherParameters;\r
-import org.bouncycastle.crypto.DataLengthException;\r
-import org.bouncycastle.crypto.params.KeyParameter;\r
-\r
-public class RC4Engine implements StreamCipher\r
-{\r
-    private final static int STATE_LENGTH = 256;\r
-\r
-    /*\r
-     * variables to hold the state of the RC4 engine\r
-     * during encryption and decryption\r
-     */\r
-\r
-    private byte[]      engineState = null;\r
-    private int         x = 0;\r
-    private int         y = 0;\r
-    private byte[]      workingKey = null;\r
-\r
-    /**\r
-     * initialise a RC4 cipher.\r
-     *\r
-     * @param forEncryption whether or not we are for encryption.\r
-     * @param params the parameters required to set up the cipher.\r
-     * @exception IllegalArgumentException if the params argument is\r
-     * inappropriate.\r
-     */\r
-    public void init(\r
-        boolean             forEncryption, \r
-        CipherParameters     params\r
-    )\r
-    {\r
-        if (params instanceof KeyParameter)\r
-        {\r
-            /* \r
-             * RC4 encryption and decryption is completely\r
-             * symmetrical, so the 'forEncryption' is \r
-             * irrelevant.\r
-             */\r
-            workingKey = ((KeyParameter)params).getKey();\r
-            setKey(workingKey);\r
-\r
-            return;\r
-        }\r
-\r
-        throw new IllegalArgumentException("invalid parameter passed to RC4 init - " + params.getClass().getName());\r
-    }\r
-\r
-    public String getAlgorithmName()\r
-    {\r
-        return "RC4";\r
-    }\r
-\r
-    public byte returnByte(byte in)\r
-    {\r
-        x = (x + 1) & 0xff;\r
-        y = (engineState[x] + y) & 0xff;\r
-\r
-        // swap\r
-        byte tmp = engineState[x];\r
-        engineState[x] = engineState[y];\r
-        engineState[y] = tmp;\r
-\r
-        // xor\r
-        return (byte)(in ^ engineState[(engineState[x] + engineState[y]) & 0xff]);\r
-    }\r
-\r
-    public void processBytes(\r
-        byte[]     in, \r
-        int     inOff, \r
-        int     len, \r
-        byte[]     out, \r
-        int     outOff\r
-    )\r
-    {\r
-        if ((inOff + len) > in.length)\r
-        {\r
-            throw new DataLengthException("input buffer too short");\r
-        }\r
-\r
-        if ((outOff + len) > out.length)\r
-        {\r
-            throw new DataLengthException("output buffer too short");\r
-        }\r
-\r
-        for (int i = 0; i < len ; i++)\r
-        {\r
-            x = (x + 1) & 0xff;\r
-            y = (engineState[x] + y) & 0xff;\r
-\r
-            // swap\r
-            byte tmp = engineState[x];\r
-            engineState[x] = engineState[y];\r
-            engineState[y] = tmp;\r
-\r
-            // xor\r
-            out[i+outOff] = (byte)(in[i + inOff]\r
-                    ^ engineState[(engineState[x] + engineState[y]) & 0xff]);\r
-        }\r
-    }\r
-\r
-    public void reset()\r
-    {\r
-        setKey(workingKey);\r
-    }\r
-\r
-    // Private implementation\r
-\r
-    private void setKey(byte[] keyBytes)\r
-    {\r
-        workingKey = keyBytes;\r
-\r
-        // System.out.println("the key length is ; "+ workingKey.length);\r
-\r
-        x = 0;\r
-        y = 0;\r
-\r
-        if (engineState == null)\r
-        {\r
-            engineState = new byte[STATE_LENGTH];\r
-        }\r
-\r
-        // reset the state of the engine\r
-        for (int i=0; i < STATE_LENGTH; i++)\r
-        {\r
-            engineState[i] = (byte)i;\r
-        }\r
-        \r
-        int i1 = 0;\r
-        int i2 = 0;\r
-\r
-        for (int i=0; i < STATE_LENGTH; i++)\r
-        {\r
-            i2 = ((keyBytes[i1] & 0xff) + engineState[i] + i2) & 0xff;\r
-            // do the byte-swap inline\r
-            byte tmp = engineState[i];\r
-            engineState[i] = engineState[i2];\r
-            engineState[i2] = tmp;\r
-            i1 = (i1+1) % keyBytes.length; \r
-        }\r
-    }\r
-}\r