Java Doc for PaddingMD.java in  » Web-Framework » RSF » uk » org » ponder » hashutil » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » RSF » uk.org.ponder.hashutil   Source Cross Reference   Class Diagram   Java Document (Java Doc)   uk.org.ponder.hashutil.MessageDigestSpi    uk.org.ponder.hashutil.PaddingMD All known Subclasses:   uk.org.ponder.hashutil.SHA, PaddingMD abstract class PaddingMD extends MessageDigestSpi (Code) This abstract class implements the MD4-like block/padding structure as it is used by most hashes (MD4, MD5, SHA-0, SHA-1, RIPEMD-128, RIPEMD-160, Tiger). This class handles the message buffering, bit counting and padding. Subclasses need implement only the three abstract functions to create a working hash. This class has three padding modes: MD5-like, SHA-like and Tiger-like. This applies to the padding and encoding of the 64-bit length counter. version:    Revision: 1.8 author:    Jeroen C. van Gelderen (gelderen@cryptix.org) Field Summary final static  int MODE_MDMODE_SHAMODE_TIGER      Constructor Summary protected   PaddingMD(int hashSize, int mode)      Construct a 64-byte PaddingMD in MD-like, SHA-like or Tiger-like padding mode. protected   PaddingMD(int blockSize, int hashSize, int mode)      Construct a 64 or 128-byte PaddingMD in MD-like, SHA-like or Tiger-like padding mode. protected   PaddingMD(PaddingMD src)      Method Summary public  Object clone()      abstract protected  void coreDigest(byte[] buf, int off)      Return the hash bytes in buf, starting at offset off. The subclass is expected to write exactly hashSize bytes in the given buffer. abstract protected  void coreReset()      Reset the hash internal structures to initial state. abstract protected  void coreUpdate(byte[] buf, int off)      Update the internal state with a single block. protected  byte[] engineDigest()      protected  int engineDigest(byte[] buf, int offset, int len)      protected  int engineGetDigestLength()      protected  void engineReset()      protected  void engineUpdate(byte input)      protected  void engineUpdate(byte[] input, int offset, int length)      Field Detail MODE_MDMODE_SHAMODE_TIGER final static int MODE_MDMODE_SHAMODE_TIGER(Code) Constructor Detail PaddingMD protected PaddingMD(int hashSize, int mode)(Code) Construct a 64-byte PaddingMD in MD-like, SHA-like or Tiger-like padding mode. The subclass must call this constructor, giving the length of its hash in bytes. Parameters:   hashSize - Length of the hash in bytes. PaddingMD protected PaddingMD(int blockSize, int hashSize, int mode)(Code) Construct a 64 or 128-byte PaddingMD in MD-like, SHA-like or Tiger-like padding mode. Parameters:   hashSize - Length of the hash in bytes. PaddingMD protected PaddingMD(PaddingMD src)(Code) Method Detail clone public Object clone() throws CloneNotSupportedException(Code) coreDigest abstract protected void coreDigest(byte[] buf, int off)(Code) Return the hash bytes in buf, starting at offset off. The subclass is expected to write exactly hashSize bytes in the given buffer. The buffer is guaranteed to be large enough. coreReset abstract protected void coreReset()(Code) Reset the hash internal structures to initial state. coreUpdate abstract protected void coreUpdate(byte[] buf, int off)(Code) Update the internal state with a single block. buf contains a single block (64 bytes, 512 bits) of data, starting at offset off. engineDigest protected byte[] engineDigest()(Code) engineDigest protected int engineDigest(byte[] buf, int offset, int len) throws DigestException(Code) engineGetDigestLength protected int engineGetDigestLength()(Code) engineReset protected void engineReset()(Code) engineUpdate protected void engineUpdate(byte input)(Code) engineUpdate protected void engineUpdate(byte[] input, int offset, int length)(Code)