| // 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 testutil_test |
| |
| import ( |
| "bytes" |
| "testing" |
| |
| "github.com/google/tink/go/subtle/random" |
| "github.com/google/tink/go/testutil" |
| "github.com/google/tink/go/tink" |
| ) |
| |
| func TestDummyAEAD(t *testing.T) { |
| // Assert that DummyAEAD implements the AEAD interface. |
| var _ tink.AEAD = (*testutil.DummyAEAD)(nil) |
| } |
| |
| func TestDummyMAC(t *testing.T) { |
| // Assert that DummyMAC implements the MAC interface. |
| var _ tink.MAC = (*testutil.DummyMAC)(nil) |
| // try to compute mac |
| data := []byte{1, 2, 3, 4, 5} |
| dummyMAC := &testutil.DummyMAC{Name: "Mac12347"} |
| digest, err := dummyMAC.ComputeMAC(data) |
| if err != nil { |
| t.Errorf("unexpected error: %s", err) |
| } |
| if !bytes.Equal(append(data, dummyMAC.Name...), digest) { |
| t.Errorf("incorrect digest") |
| } |
| if err := dummyMAC.VerifyMAC(nil, nil); err != nil { |
| t.Errorf("unexpected result of VerifyMAC") |
| } |
| } |
| |
| func fillByteArray(b byte, length int) []byte { |
| result := []byte{} |
| for i := 0; i < length; i++ { |
| result = append(result, b) |
| } |
| return result |
| } |
| |
| func TestUniformString(t *testing.T) { |
| if err := testutil.ZTestUniformString(fillByteArray(0xaa, 32)); err != nil { |
| t.Errorf("Expected repeated 0xaa string to pass: %v", err) |
| } |
| if err := testutil.ZTestUniformString(fillByteArray(0x00, 32)); err == nil { |
| t.Errorf("Expected to fail uniform distribution test for 32 zero bytes") |
| } |
| if err := testutil.ZTestUniformString(random.GetRandomBytes(32)); err != nil { |
| t.Errorf("Expected random string to pass randomness test: %v", err) |
| } |
| } |
| |
| func TestCrossCorrelationUniformString(t *testing.T) { |
| if err := testutil.ZTestCrosscorrelationUniformStrings(fillByteArray(0xaa, 32), |
| fillByteArray(0x99, 32)); err != nil { |
| t.Errorf("Expected 0xaa and 0x99 repeated 32 times each to have no cross correlation: %v", err) |
| } |
| if err := testutil.ZTestCrosscorrelationUniformStrings(fillByteArray(0xaa, 32), |
| fillByteArray(0xaa, 32)); err == nil { |
| t.Errorf("Expected 0xaa repeated 32 times to be cross correlated with itself") |
| } |
| if err := testutil.ZTestCrosscorrelationUniformStrings(random.GetRandomBytes(32), |
| random.GetRandomBytes(32)); err != nil { |
| t.Errorf("Expected random 32 byte strings to not be crosscorrelated: %v", err) |
| } |
| } |
| |
| func TestAutocorrelationUniformString(t *testing.T) { |
| if err := testutil.ZTestAutocorrelationUniformString(fillByteArray(0xaa, 32)); err == nil { |
| t.Errorf("Expected repeated string to show autocorrelation") |
| } |
| if err := testutil.ZTestAutocorrelationUniformString([]byte( |
| "This is a text that is only ascii characters and therefore " + |
| "not random. It needs quite a few characters before it has " + |
| "enough to find a pattern, though, as it is text.")); err == nil { |
| t.Errorf("Expected longish English ASCII test to be autocorrelated") |
| } |
| if err := testutil.ZTestAutocorrelationUniformString(random.GetRandomBytes(32)); err != nil { |
| t.Errorf("Expected random 32 byte string to show not autocorrelation: %v", err) |
| } |
| } |