src/share/classes/sun/security/provider/DigestBase.java

*** 37,47 ****
   * implement the following methods:
   *
   *  . abstract void implCompress(byte[] b, int ofs);
   *  . abstract void implDigest(byte[] out, int ofs);
   *  . abstract void implReset();
-  *  . public abstract Object clone();
   *
   * See the inline documentation for details.
   *
   * @since   1.5
   * @author  Andreas Sterbenz
--- 37,46 ----
*** 59,69 ****
      // size of the input to the compression function in bytes
      private final int blockSize;
      // buffer to store partial blocks, blockSize bytes large
      // Subclasses should not access this array directly except possibly in their
      // implDigest() method. See MD5.java as an example.
!     final byte[] buffer;
      // offset into buffer
      private int bufOfs;
  
      // number of bytes processed so far. subclasses should not modify
      // this value.
--- 58,68 ----
      // size of the input to the compression function in bytes
      private final int blockSize;
      // buffer to store partial blocks, blockSize bytes large
      // Subclasses should not access this array directly except possibly in their
      // implDigest() method. See MD5.java as an example.
!     byte[] buffer;
      // offset into buffer
      private int bufOfs;
  
      // number of bytes processed so far. subclasses should not modify
      // this value.
*** 81,102 ****
          this.digestLength = digestLength;
          this.blockSize = blockSize;
          buffer = new byte[blockSize];
      }
  
-     /**
-      * Constructor for cloning. Replicates common data.
-      */
-     DigestBase(DigestBase base) {
-         this.algorithm = base.algorithm;
-         this.digestLength = base.digestLength;
-         this.blockSize = base.blockSize;
-         this.buffer = base.buffer.clone();
-         this.bufOfs = base.bufOfs;
-         this.bytesProcessed = base.bytesProcessed;
-     }
- 
      // return digest length. See JCA doc.
      protected final int engineGetDigestLength() {
          return digestLength;
      }
  
--- 80,89 ----
*** 204,219 ****
       * Reset subclass specific state to their initial values. DigestBase
       * calls this method when necessary.
       */
      abstract void implReset();
  
!     /**
!      * Clone this digest. Should be implemented as "return new MyDigest(this)".
!      * That constructor should first call "super(baseDigest)" and then copy
!      * subclass specific data.
!      */
!     public abstract Object clone();
  
      // padding used for the MD5, and SHA-* message digests
      static final byte[] padding;
  
      static {
--- 191,205 ----
       * Reset subclass specific state to their initial values. DigestBase
       * calls this method when necessary.
       */
      abstract void implReset();
  
!     public Object clone() throws CloneNotSupportedException {
!         DigestBase copy = (DigestBase) super.clone();
!         copy.buffer = copy.buffer.clone();
!         return copy;
!     }
  
      // padding used for the MD5, and SHA-* message digests
      static final byte[] padding;
  
      static {
*** 221,227 ****
          // and an additional 8 bytes for the high 8 bytes of the 16
          // byte bit counter in SHA-384/512
          padding = new byte[136];
          padding[0] = (byte)0x80;
      }
- 
  }
--- 207,212 ----