// It must never be stored in plaintext.
type ObjectKey [32]byte

// GenerateKey generates a unique ObjectKey from a 256 bit external key
// and a source of randomness. If random is nil the default PRNG of the
// system (crypto/rand) is used.
func GenerateKey(extKey []byte, random io.Reader) (key ObjectKey) {
	if random == nil {
		random = rand.Reader
	}
	if len(extKey) != 32 { // safety check

	}
}

var generateKeyTests = []struct {
	ExtKey     [32]byte
	Random     io.Reader
	ShouldPass bool
}{
	{ExtKey: [32]byte{}, Random: nil, ShouldPass: true},              // 0
	{ExtKey: [32]byte{}, Random: rand.Reader, ShouldPass: true},      // 1
	{ExtKey: [32]byte{}, Random: shortRandom(32), ShouldPass: true},  // 2
	{ExtKey: [32]byte{}, Random: shortRandom(31), ShouldPass: false}, // 3
}

                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.195.211",
                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.252.206",
                              "prefix_len": 32
                            },

	MOVHU.W	R3, 0x20(R4)         // MOVHU.W R3, 32(R4)        // b032e4e1
	MOVHU.P	R3, 0x20(R4)         // MOVHU.P R3, 32(R4)        // b032c4e0
	MOVH	R3, -0x20(R4)        // MOVH R3, -32(R4)          // b03244e1
	MOVH.W	R3, -0x20(R4)        // MOVH.W R3, -32(R4)        // b03264e1
	MOVH.P	R3, -0x20(R4)        // MOVH.P R3, -32(R4)        // b03244e0
	MOVHS	R3, -0x20(R4)        // MOVHS R3, -32(R4)         // b03244e1

                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.195.211",
                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.252.206",
                              "prefix_len": 32
                            },

	MOVD	(g), F3                                   // 003b9aed
	MOVF	0x20(R3), F9       // MOVF 32(R3), F9     // 089a93ed
	MOVD.EQ	0x20(R4), F9       // MOVD.EQ 32(R4), F9  // 089b940d
	MOVF.NE	-0x20(g), F3       // MOVF.NE -32(g), F3  // 083a1a1d
	MOVD	-0x20(g), F3       // MOVD -32(g), F3     // 083b1aed
	MOVF	F9, (R4)                                  // 009a84ed

  }

  public void testAscending() {
    // Test 32 byte arrays of ascending.
    byte[] ascending = new byte[32];
    for (int i = 0; i < 32; i++) {
      ascending[i] = (byte) i;
    }
    assertCrc(0x46dd794e, ascending);
  }

  public void testDescending() {
    // Test 32 byte arrays of descending.
    byte[] descending = new byte[32];
    for (int i = 0; i < 32; i++) {
      descending[i] = (byte) (31 - i);
    }

          if (supplementaryPlaneFix) { // bug compatibility: earlier versions did not have this add
            shift += 32;
          }
          len += 4;
        }

        if (shift >= 32) {
          int k1 = mixK1((int) buffer);
          h1 = mixH1(h1, k1);
          buffer = buffer >>> 32;
          shift -= 32;
        }
      }

      int k1 = mixK1((int) buffer);
      h1 ^= k1;

  }

  public void testAscending() {
    // Test 32 byte arrays of ascending.
    byte[] ascending = new byte[32];
    for (int i = 0; i < 32; i++) {
      ascending[i] = (byte) i;
    }
    assertCrc(0x46dd794e, ascending);
  }

  public void testDescending() {
    // Test 32 byte arrays of descending.
    byte[] descending = new byte[32];
    for (int i = 0; i < 32; i++) {
      descending[i] = (byte) (31 - i);
    }

		h = h[:len(h)-hashLen]
	}
	// Extract subroute if any.
	if m.Flags&FlagSubroute != 0 {
		if len(h) < 32 {
			return nil, nil, fmt.Errorf("want subroute len 32, got %v", len(h))
		}
		subID := (*[32]byte)(h[len(h)-32:])
		sub = (*subHandlerID)(subID)
		// Add if more modifications to h is needed
		h = h[:len(h)-32]
	}
	return sub, h, nil
}

// setZeroPayloadFlag will clear or set the FlagPayloadIsZero if