fixed the implementation of Bignum#to_ber.

lib/net/ber.rb

@@ -409,9 +409,22 @@ end # class Fixnum
 class Bignum
 
   def to_ber
-    i = [self].pack('w')
-    i.length > 126 and raise Net::BER::BerError.new( "range error in bignum" )
-    [2, i.length].pack("CC") + i
+    #i = [self].pack('w')
+    #i.length > 126 and raise Net::BER::BerError.new( "range error in bignum" )
+    #[2, i.length].pack("CC") + i
+
+    # Ruby represents Bignums as two's-complement numbers so we may actually be
+    # good as far as representing negatives goes.
+    # I'm sure this implementation can be improved performance-wise if necessary.
+    sz = self.size
+    out = "\000" * sz
+    (sz*8).times {|bit|
+	if self[bit] == 1
+	    out[bit/8] += (1 << (bit % 8))
+	end
+    }
+
+    [2, sz].pack("CC") + out.reverse
   end
 
 end