svn commit: rev 6596 - incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber

[we...@apache.org]

Author: wesmckean
Date: Sun Feb  8 07:59:08 2004
New Revision: 6596

Modified:
   incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/BERDecoder.java
Log:
Added decodeNull and decodeObjectIdentifier.

Modified: incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/BERDecoder.java
==============================================================================
--- incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/BERDecoder.java	(original)
+++ incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/BERDecoder.java	Sun Feb  8 07:59:08 2004
@@ -117,4 +117,67 @@
             
         return new String( bytes );
     }
+    
+	/* (non-Javadoc)
+	 * @see org.apache.snickers.asn.ASNDecoder#decodeNull(int[])
+	 */
+	public void decodeNull(int[] value) {
+	}
+
+
+	/* (non-Javadoc)
+	 * @see org.apache.snickers.asn.ASNDecoder#decodeObjectIdentifier(int[])
+	 */
+	public String decodeObjectIdentifier(int[] value) {
+        StringBuffer sb = new StringBuffer();
+        int length = value.length;
+        int index = 0;
+        int aByte;
+        
+        // The first byte is special, so we have to handle it outside our
+        // our loop where we process it below.  Special thanks to the folks
+        // at Cryptix, on SourceForge for helping me understand how to do
+        // this.
+        
+        if( length > 1 ) {
+            length--;
+            
+            // Isolate t first byte
+            aByte = value[index++] & 0xFF;
+            int firstValue = 0;
+            
+            if( aByte >= 40 && aByte < 80 ) {
+                firstValue = 1;
+            }
+            else if( aByte >= 80 ) {
+                firstValue = 2;
+            }
+            
+            int secondValue = aByte - ( firstValue * 40 );
+            sb.append( firstValue );
+            sb.append( '.' );
+            sb.append( secondValue );
+        }
+
+        // Now process the rest of the OID ints.  Each individual
+        // integer is part of the value, and we keep processing it
+        // while the more bit is set.
+        while (length > 0) { 
+            sb.append(".");
+            int subId = 0;
+            boolean more;
+            
+            do {
+                more = ((value[index] & 0x80) != 0 );
+                aByte = value[index++] & 0x7F;
+                subId = (subId << 7) | aByte;
+            } while (--length > 0 && more );
+
+            sb.append(subId);
+        }
+
+        String result = sb.toString();
+        return (result);
+	}
+
 }