lib/compat/securerandom.rb in uuidtools-1.0.6 vs lib/compat/securerandom.rb in uuidtools-1.0.7

@@ -158,16 +158,19 @@
     def self.random_number(n=0)
       if 0 < n
         hex = n.to_s(16)
         hex = '0' + hex if (hex.length & 1) == 1
         bin = [hex].pack("H*")
-        mask = bin[0].ord
+        first = bin[0..0]
+        mask = first.respond_to?(:ord) ? first.ord : first.sum(8)
         mask |= mask >> 1
         mask |= mask >> 2
         mask |= mask >> 4
         begin
           rnd = SecureRandom.random_bytes(bin.length)
-          rnd[0] = (rnd[0].ord & mask).chr
+          first = rnd[0..0]
+          ordinal = first.respond_to?(:ord) ? first.ord : first.sum(8)
+          rnd[0..0] = (ordinal & mask).chr
         end until rnd < bin
         rnd.unpack("H*")[0].hex
       else
         # assumption: Float::MANT_DIG <= 64
         i64 = SecureRandom.random_bytes(8).unpack("Q")[0]