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Class iaik.utils.CryptoUtils

java.lang.Object
   |
   +----iaik.utils.CryptoUtils

public class CryptoUtils

extends Object

CryptoUtils()

copyBlock(byte[], byte[])

Copy one block to another.

copyBlock(byte[], int, byte[], int, int)

Copy one block to another.

equalsBlock(byte[], byte[])

Check two blocks for equality.

equalsBlock(byte[], int, byte[], int, int)

Check two blocks for equality.

fillBlock(byte[], byte)

Fill a block with a given byte.

fillBlock(byte[], int, byte, int)

Fill a block with a given byte.

randomBlock(byte[])

Fills a block with random bytes.

randomBlock(byte[], int, int)

Fills a block with random bytes.

resizeArray(byte[], int)

Resize an array.

spreadIntsToBytes(int[], int, byte[], int, int)

Spread ints into bytes.

spreadShortsToBytesBE(int[], int, byte[], int, int)

Spread shorts into bytes in big-endian.

spreadShortsToBytesLE(int[], int, byte[], int, int)

Spread shorts into bytes in little-endian.

squashBytesToInts(byte[], int, int[], int, int)

Squash bytes down to ints.

squashBytesToShortsBE(byte[], int, int[], int, int)

Squash bytes down to shorts in big-endian.

squashBytesToShortsLE(byte[], int, int[], int, int)

Squash bytes down to shorts in little-endian.

xorBlock(byte[], byte[], byte[])

XOR two blocks.

xorBlock(byte[], int, byte[], int, byte[], int, int)

XOR two blocks.

zeroBlock(byte[])

Fills a block with zeros.

zeroBlock(byte[], int, int)

Fills a block with zeros.

 public CryptoUtils()

 public static void zeroBlock(byte block[],
                              int off,
                              int len)

Fills a block with zeros.

 public static void zeroBlock(byte block[])

Fills a block with zeros.

 public static void randomBlock(byte block[],
                                int off,
                                int len)

Fills a block with random bytes.

 public static void randomBlock(byte block[])

Fills a block with random bytes.

 public static void xorBlock(byte a[],
                             int aOff,
                             byte b[],
                             int bOff,
                             byte dst[],
                             int dstOff,
                             int len)

XOR two blocks.

 public static void xorBlock(byte a[],
                             byte b[],
                             byte dst[])

XOR two blocks.

 public static void copyBlock(byte src[],
                              int srcOff,
                              byte dst[],
                              int dstOff,
                              int len)

Copy one block to another.

 public static void copyBlock(byte src[],
                              byte dst[])

Copy one block to another.

 public static boolean equalsBlock(byte a[],
                                   int aOff,
                                   byte b[],
                                   int bOff,
                                   int len)

Check two blocks for equality.

 public static boolean equalsBlock(byte a[],
                                   byte b[])

Check two blocks for equality.

 public static void fillBlock(byte block[],
                              int blockOff,
                              byte b,
                              int len)

Fill a block with a given byte.

 public static void fillBlock(byte block[],
                              byte b)

Fill a block with a given byte.

 public static void squashBytesToInts(byte inBytes[],
                                      int inOff,
                                      int outInts[],
                                      int outOff,
                                      int intLen)

Squash bytes down to ints.

 public static void spreadIntsToBytes(int inInts[],
                                      int inOff,
                                      byte outBytes[],
                                      int outOff,
                                      int intLen)

Spread ints into bytes.

 public static void squashBytesToShortsBE(byte inBytes[],
                                          int inOff,
                                          int outShorts[],
                                          int outOff,
                                          int shortLen)

Squash bytes down to shorts in big-endian.

 public static void squashBytesToShortsLE(byte inBytes[],
                                          int inOff,
                                          int outShorts[],
                                          int outOff,
                                          int shortLen)

Squash bytes down to shorts in little-endian.

 public static void spreadShortsToBytesBE(int inShorts[],
                                          int inOff,
                                          byte outBytes[],
                                          int outOff,
                                          int shortLen)

Spread shorts into bytes in big-endian.

 public static void spreadShortsToBytesLE(int inShorts[],
                                          int inOff,
                                          byte outBytes[],
                                          int outOff,
                                          int shortLen)

Spread shorts into bytes in little-endian.

 public static byte[] resizeArray(byte array[],
                                  int len)

Resize an array. If len is smaller than the array size some bytes are lost.

Parameters:

array - the array to resize

len - the new length of the array

Returns:

the resized array

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