Example #1
0
// TestVarBytesOverflowErrors performs tests to ensure deserializing variable
// length byte arrays intentionally crafted to use large values for the array
// length are handled properly.  This could otherwise potentially be used as an
// attack vector.
func TestVarBytesOverflowErrors(t *testing.T) {
	pver := wire.ProtocolVersion

	tests := []struct {
		buf  []byte // Wire encoding
		pver uint32 // Protocol version for wire encoding
		err  error  // Expected error
	}{
		{[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
			pver, &wire.MessageError{}},
		{[]byte{0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
			pver, &wire.MessageError{}},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Decode from wire format.
		rbuf := bytes.NewReader(test.buf)
		_, err := wire.TstReadVarBytes(rbuf, test.pver,
			wire.MaxMessagePayload, "test payload")
		if reflect.TypeOf(err) != reflect.TypeOf(test.err) {
			t.Errorf("readVarBytes #%d wrong error got: %v, "+
				"want: %v", i, err, reflect.TypeOf(test.err))
			continue
		}
	}

}
Example #2
0
// TestVarBytesWire tests wire encode and decode for variable length byte array.
func TestVarBytesWire(t *testing.T) {
	pver := wire.ProtocolVersion

	// bytes256 is a byte array that takes a 2-byte varint to encode.
	bytes256 := bytes.Repeat([]byte{0x01}, 256)

	tests := []struct {
		in   []byte // Byte Array to write
		buf  []byte // Wire encoding
		pver uint32 // Protocol version for wire encoding
	}{
		// Latest protocol version.
		// Empty byte array
		{[]byte{}, []byte{0x00}, pver},
		// Single byte varint + byte array
		{[]byte{0x01}, []byte{0x01, 0x01}, pver},
		// 2-byte varint + byte array
		{bytes256, append([]byte{0xfd, 0x00, 0x01}, bytes256...), pver},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode to wire format.
		var buf bytes.Buffer
		err := wire.TstWriteVarBytes(&buf, test.pver, test.in)
		if err != nil {
			t.Errorf("writeVarBytes #%d error %v", i, err)
			continue
		}
		if !bytes.Equal(buf.Bytes(), test.buf) {
			t.Errorf("writeVarBytes #%d\n got: %s want: %s", i,
				spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
			continue
		}

		// Decode from wire format.
		rbuf := bytes.NewReader(test.buf)
		val, err := wire.TstReadVarBytes(rbuf, test.pver,
			wire.MaxMessagePayload, "test payload")
		if err != nil {
			t.Errorf("readVarBytes #%d error %v", i, err)
			continue
		}
		if !bytes.Equal(buf.Bytes(), test.buf) {
			t.Errorf("readVarBytes #%d\n got: %s want: %s", i,
				val, test.buf)
			continue
		}
	}
}
Example #3
0
// TestVarBytesWireErrors performs negative tests against wire encode and
// decode of variable length byte arrays to confirm error paths work correctly.
func TestVarBytesWireErrors(t *testing.T) {
	pver := wire.ProtocolVersion

	// bytes256 is a byte array that takes a 2-byte varint to encode.
	bytes256 := bytes.Repeat([]byte{0x01}, 256)

	tests := []struct {
		in       []byte // Byte Array to write
		buf      []byte // Wire encoding
		pver     uint32 // Protocol version for wire encoding
		max      int    // Max size of fixed buffer to induce errors
		writeErr error  // Expected write error
		readErr  error  // Expected read error
	}{
		// Latest protocol version with intentional read/write errors.
		// Force errors on empty byte array.
		{[]byte{}, []byte{0x00}, pver, 0, io.ErrShortWrite, io.EOF},
		// Force error on single byte varint + byte array.
		{[]byte{0x01, 0x02, 0x03}, []byte{0x04}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
		// Force errors on 2-byte varint + byte array.
		{bytes256, []byte{0xfd}, pver, 2, io.ErrShortWrite, io.ErrUnexpectedEOF},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode to wire format.
		w := newFixedWriter(test.max)
		err := wire.TstWriteVarBytes(w, test.pver, test.in)
		if err != test.writeErr {
			t.Errorf("writeVarBytes #%d wrong error got: %v, want: %v",
				i, err, test.writeErr)
			continue
		}

		// Decode from wire format.
		r := newFixedReader(test.max, test.buf)
		_, err = wire.TstReadVarBytes(r, test.pver,
			wire.MaxMessagePayload, "test payload")
		if err != test.readErr {
			t.Errorf("readVarBytes #%d wrong error got: %v, want: %v",
				i, err, test.readErr)
			continue
		}
	}
}