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/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package conn
import (
"bytes"
"testing"
core "google.golang.org/grpc/credentials/alts/internal"
)
const (
testOverflowLen = 5
)
func (s) TestCounterSides(t *testing.T) {
for _, side := range []core.Side{core.ClientSide, core.ServerSide} {
outCounter := NewOutCounter(side, testOverflowLen)
inCounter := NewInCounter(side, testOverflowLen)
for i := 0; i < 1024; i++ {
value, _ := outCounter.Value()
if g, w := CounterSide(value), side; g != w {
t.Errorf("after %d iterations, CounterSide(outCounter.Value()) = %v, want %v", i, g, w)
break
}
value, _ = inCounter.Value()
if g, w := CounterSide(value), side; g == w {
t.Errorf("after %d iterations, CounterSide(inCounter.Value()) = %v, want %v", i, g, w)
break
}
outCounter.Inc()
inCounter.Inc()
}
}
}
func (s) TestCounterInc(t *testing.T) {
for _, test := range []struct {
counter []byte
want []byte
}{
{
counter: []byte{0x00, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
want: []byte{0x01, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
},
{
counter: []byte{0x00, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x80},
want: []byte{0x01, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x80},
},
{
counter: []byte{0xff, 0x00, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
want: []byte{0x00, 0x01, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
},
{
counter: []byte{0x42, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
want: []byte{0x43, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
},
{
counter: []byte{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
want: []byte{0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
},
{
counter: []byte{0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80},
want: []byte{0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80},
},
} {
c := CounterFromValue(test.counter, overflowLenAES128GCM)
c.Inc()
value, _ := c.Value()
if g, w := value, test.want; !bytes.Equal(g, w) || c.invalid {
t.Errorf("counter(%v).Inc() =\n%v, want\n%v", test.counter, g, w)
}
}
}
func (s) TestRolloverCounter(t *testing.T) {
for _, test := range []struct {
desc string
value []byte
overflowLen int
}{
{
desc: "testing overflow without rekeying 1",
value: []byte{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80},
overflowLen: 5,
},
{
desc: "testing overflow without rekeying 2",
value: []byte{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
overflowLen: 5,
},
{
desc: "testing overflow for rekeying mode 1",
value: []byte{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x80},
overflowLen: 8,
},
{
desc: "testing overflow for rekeying mode 2",
value: []byte{0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00},
overflowLen: 8,
},
} {
c := CounterFromValue(test.value, overflowLenAES128GCM)
// First Inc() + Value() should work.
c.Inc()
_, err := c.Value()
if err != nil {
t.Errorf("%v: first Inc() + Value() unexpectedly failed: %v, want <nil> error", test.desc, err)
}
// Second Inc() + Value() should fail.
c.Inc()
_, err = c.Value()
if err != errInvalidCounter {
t.Errorf("%v: second Inc() + Value() unexpectedly succeeded: want %v", test.desc, errInvalidCounter)
}
// Third Inc() + Value() should also fail because the counter is
// already in an invalid state.
c.Inc()
_, err = c.Value()
if err != errInvalidCounter {
t.Errorf("%v: Third Inc() + Value() unexpectedly succeeded: want %v", test.desc, errInvalidCounter)
}
}
}
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