shaibuttonuser33.java

这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统

    * @param offset the offset into fullBindCode where copying should begin.
    */
   public void getFullBindCode(byte[] l_fullBindCode, int offset)
   {
      System.arraycopy(this.fullBindCode,0,
                       l_fullBindCode,offset,
                       15);
      /*System.arraycopy(ffBlock, 0, fullBindCode, offset, 15);
      fullBindCode[offset+4] = (byte)((0x40)|(byte)this.accountPageNumber);
      System.arraycopy(this.address, 0, fullBindCode, offset+5, 7);*/
   }

   /**
    * <P>Returns a byte representing the appropriate authorization command
    * for the coprocessor to use to authenticate this user. For a DS1961S,
    * the authentication command is AUTH_HOST.</P>
    *
    * @return byte indicating appropriate command for authenticating user
    *
    */
   public byte getAuthorizationCommand()
   {
      return OneWireContainer18.AUTH_HOST;
   }

   private byte[] writeAccountData_copyAuth   = new byte[32];
   private byte[] writeAccountData_scratchpad = new byte[32];
   private byte[] writeAccountData_pageData   = new byte[32];
   /**
    * <P>Writes the account data to the SHAiButton.  First, this function
    * asserts that the account page number is known.  The account data is
    * copied from dataBuffer starting at the offset.  If there are less
    * than 32 bytes available to copy, this function only copies the bytes
    * that are available.</P>
    *
    * <P>Note that for the DS1961S user button, an authorization MAC must
    * be generated for the copy-scratchpad command.  Since the scratchpad
    * is only 8 bytes long, this must be done 4 times to write a page of
    * data.  So, this function only writes (in 8 byte blocks) the bytes
    * that have changed.</P>
    *
    * @param dataBuffer the buffer to copy the account data from
    * @param offset the index into the buffer where copying should begin
    * @return whether or not the data write succeeded
    *
    * @throws OneWireIOException on a 1-Wire communication error such as
    *         reading an incorrect CRC from a 1-Wire device.  This could be
    *         caused by a physical interruption in the 1-Wire Network due to
    *         shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
    * @throws OneWireException on a communication or setup error with the 1-Wire
    *         adapter
    */
   public synchronized boolean writeAccountData(byte[] dataBuffer, int offset)
      throws OneWireException, OneWireIOException
   {
      //local vars.
      OneWireContainer33 ibcL = this.ibc33;
      byte[] copyAuth      = this.writeAccountData_copyAuth;
      byte[] scratchpad    = this.writeAccountData_scratchpad;
      byte[] pageData      = this.writeAccountData_pageData;
      byte[] fullBindCode  = this.fullBindCode;
      SHAiButtonCopr coprL = this.copr;

      //make sure account info is properly setup
      if(!checkAccountPageInfo(ibcL))
         return false;

      //if the part is being initialized, the container class "knows"
      //the secret already.  no need for a coprocessor.
      if(ibcL.isContainerSecretSet())
      {
         //use container to write the data page, since it knows the secret
         ibcL.writeDataPage(this.accountPageNumber, dataBuffer);
         //update the data cache
         System.arraycopy(dataBuffer, offset, this.accountData, 0, 32);
      }
      else
      {
         //since the container's secret is not set, we have to use the
         //coprocessor for generating the copy scratchpad authorization.
         if(coprL==null)
         {
            throw new OneWireException("No Write Authorization Coprocessor Available!");
         }

         //copy the data cache into a working page;
         System.arraycopy(this.accountData, 0, pageData, 0, 32);

         //takes four write/copies to actually write the data page.
         for(int i=24; i>=0; i-=8)
         {
            int index = offset + i;
            //only perform any action if the data needs to be updated
            if(   (dataBuffer[index  ] != accountData[i  ]) ||
                  (dataBuffer[index+1] != accountData[i+1]) ||
                  (dataBuffer[index+2] != accountData[i+2]) ||
                  (dataBuffer[index+3] != accountData[i+3]) ||
                  (dataBuffer[index+4] != accountData[i+4]) ||
                  (dataBuffer[index+5] != accountData[i+5]) ||
                  (dataBuffer[index+6] != accountData[i+6]) ||
                  (dataBuffer[index+7] != accountData[i+7])     )
            {
               //format the working page for generating the
               //appropriate copy authorization mac
               pageData[28] = dataBuffer[index];
               pageData[29] = dataBuffer[index+1];
               pageData[30] = dataBuffer[index+2];
               pageData[31] = dataBuffer[index+3];

               //format the scratchpad for generating the
               //appropriate copy authorization mac
               scratchpad[8] = dataBuffer[index+4];
               scratchpad[9] = dataBuffer[index+5];
               scratchpad[10] = dataBuffer[index+6];
               scratchpad[11] = dataBuffer[index+7];

               //add in the page num and address
               System.arraycopy(this.fullBindCode, 4,
                                scratchpad, 12, 11);

               //\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\
               if(DEBUG)
               {
                  IOHelper.writeLine("------------------------------------------------------------");
                  IOHelper.writeLine("SHAiButtonUser33 - writeAccountData loop ");
                  IOHelper.writeLine("current account data state: ");
                  IOHelper.writeBytesHex(this.accountData);
                  IOHelper.writeLine("current byte block: " + i);
                  IOHelper.writeLine("New bytes for block: ");
                  IOHelper.writeBytesHex(dataBuffer,index,8);
                  IOHelper.writeLine("------------------------------------------------------------");
               }
               //\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\

               //get the copy authorization mac
               coprL.createDataSignatureAuth(pageData, scratchpad,
                                             copyAuth, 0, fullBindCode);

               //only need to pass it to coprocessor once
               fullBindCode = null;

               //write 8 bytes of data to the DS1961S scratchpad
               if(!ibcL.writeScratchpad(this.accountPageNumber, i,
                                        dataBuffer, index, 8))
                  //operation failed
                  return false;

               //copy scratchpad to page
               if(!ibcL.copyScratchpad(this.accountPageNumber, i,
                                        copyAuth, 0))
                  //operation failed
                  return false;

               //update cache of account data
               System.arraycopy(dataBuffer, index,
                                this.accountData, i, 8);

               //update our working copy of the account data
               System.arraycopy(this.accountData, 0,
                                pageData, 0, 32);
            }
         }
      }
      return true;
   }

   /**
    * <P>Reads the account data off the SHAiButton using a standard READ
    * command.  First, this function asserts that the account page number is
    * known as well as the length of the account file.  The 32 byte account
    * data page is copied into dataBuffer starting at the given offset.</P>
    *
    * @param dataBuffer the buffer to copy the account data into
    * @param offset the index into the buffer where copying should begin
    * @return whether or not the read was successful
    */
   public synchronized boolean readAccountData(byte[] dataBuffer, int offset)
      throws OneWireException, OneWireIOException
   {
      //init local vars
      OneWireContainer33 ibcL = this.ibc33;

      //make sure account info is properly setup
      if(!checkAccountPageInfo(ibcL))
      {
         return false;
      }

      //if the cache is empty
      if(this.accountData[0]==0)
      {
         //read directly into local cache
         ibcL.readMemoryPage(this.accountPageNumber, this.accountData, 0);
      }

      //copy from cache into output buffer
      System.arraycopy(this.accountData, 0, dataBuffer, offset, 32);

      //had to work, right?
      return true;
   }

   /**
    * <P>Reads the account data off the SHAiButton using a READ_AUTHENTICATE
    * command.  First, this function asserts that the account page number is
    * known as well as the length of the account file.  Then it copies the
    * 3 byte challenge to the scratchpad before sending the command for
    * READ_AUTHENTICATE.  The 32 byte account data page is copied into
    * dataBuffer starting at dataStart.</P>
    *
    * <P>In addition to the account data, this function also returns a
    * calculated MAC.  The MAC requires 20 bytes after the start index.
    * The return value is the write cycle counter value for the account
    * data page<p>
    *
    * @param chlg the buffer containing a 3-byte random challenge.
    * @param chlgStart the index into the buffer where the 3 byte
    *        challenge begins.
    * @param dataBuffer the buffer to copy the account data into
    * @param dataStart the index into the buffer where copying should begin
    * @param mac the buffer to copy the resulting Message Authentication Code
    * @param macStart the index into the mac buffer to start copying
    *
    * @return the value of the write cycle counter for the page
    */
   public synchronized int readAccountData(byte[] chlg, int chlgStart,
                                           byte[] dataBuffer, int dataStart,
                                           byte[] mac, int macStart)
      throws OneWireException, OneWireIOException
   {
      //init local variables
      OneWireContainer33 ibcL = this.ibc33;

      //make sure account info is properly setup
      if(this.accountPageNumber<0)
      {
         //user not setup
         throw new OneWireException("SHAiButtonUser Not Properly Initialized");
      }

      //\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\
      if(DEBUG)
      {
         // for debug, lets use a constant challenge
         chlg[0] = 0x00;
         chlg[1] = 0x00;
         chlg[2] = 0x00;
      }
      //\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\

      //container keeps challenge as a member of the class
      ibcL.setChallenge(chlg, chlgStart);

      //performs the read authenticated page, to answer the challenge
      if(ibcL.readAuthenticatedPage(this.accountPageNumber,
                                    dataBuffer, dataStart,
                                    mac, macStart))
      {
         //copy from outputbuffer into cache
         System.arraycopy(dataBuffer, dataStart, this.accountData, 0, 32);

         //has no write cycle counter
         return -1;
      }
      else
      {
         throw new OneWireException("SHAiButtonUser ReadAuthenticatedPage Failed");
      }
   }

   /**
    * Refreshes eeprom SHA devices in case of weakly-programmed bits on
    * the account page.
    *
    * @return true if the refresh was successful
    */
   public boolean refreshDevice()
      throws OneWireException,OneWireIOException
   {
      return ibc33.refreshPage(this.accountPageNumber);
   }

}