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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 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 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 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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