/
SecurityPoliciesTest.java
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/
SecurityPoliciesTest.java
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/*
* Copyright 2020 The 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 io.grpc.binder;
import static com.google.common.truth.Truth.assertThat;
import static org.robolectric.Shadows.shadowOf;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.os.Process;
import androidx.test.core.app.ApplicationProvider;
import com.google.common.collect.ImmutableList;
import io.grpc.Status;
import io.grpc.binder.SecurityPolicy;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
@RunWith(RobolectricTestRunner.class)
public final class SecurityPoliciesTest {
private static final int MY_UID = Process.myUid();
private static final int OTHER_UID = MY_UID + 1;
private static final int OTHER_UID_SAME_SIGNATURE = MY_UID + 2;
private static final int OTHER_UID_NO_SIGNATURE = MY_UID + 3;
private static final int OTHER_UID_UNKNOWN = MY_UID + 4;
private static final String PERMISSION_DENIED_REASONS = "some reasons";
private static final Signature SIG1 = new Signature("1234");
private static final Signature SIG2 = new Signature("4321");
private static final String OTHER_UID_PACKAGE_NAME = "other.package";
private static final String OTHER_UID_SAME_SIGNATURE_PACKAGE_NAME = "other.package.samesignature";
private static final String OTHER_UID_NO_SIGNATURE_PACKAGE_NAME = "other.package.nosignature";
private Context appContext;
private PackageManager packageManager;
private SecurityPolicy policy;
@Before
public void setUp() {
appContext = ApplicationProvider.getApplicationContext();
packageManager = appContext.getPackageManager();
installPackage(MY_UID, appContext.getPackageName(), SIG1);
installPackage(OTHER_UID, OTHER_UID_PACKAGE_NAME, SIG2);
installPackage(OTHER_UID_SAME_SIGNATURE, OTHER_UID_SAME_SIGNATURE_PACKAGE_NAME, SIG1);
installPackage(OTHER_UID_NO_SIGNATURE, OTHER_UID_NO_SIGNATURE_PACKAGE_NAME);
}
@SuppressWarnings("deprecation")
private void installPackage(int uid, String packageName, Signature... signatures) {
PackageInfo info = new PackageInfo();
info.packageName = packageName;
info.signatures = signatures;
shadowOf(packageManager).installPackage(info);
shadowOf(packageManager).setPackagesForUid(uid, packageName);
}
@Test
public void testInternalOnly() throws Exception {
policy = SecurityPolicies.internalOnly();
assertThat(policy.checkAuthorization(MY_UID).getCode()).isEqualTo(Status.OK.getCode());
assertThat(policy.checkAuthorization(OTHER_UID).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
}
@Test
public void testPermissionDenied() throws Exception {
policy = SecurityPolicies.permissionDenied(PERMISSION_DENIED_REASONS);
assertThat(policy.checkAuthorization(MY_UID).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
assertThat(policy.checkAuthorization(MY_UID).getDescription())
.isEqualTo(PERMISSION_DENIED_REASONS);
assertThat(policy.checkAuthorization(OTHER_UID).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
assertThat(policy.checkAuthorization(OTHER_UID).getDescription())
.isEqualTo(PERMISSION_DENIED_REASONS);
}
@Test
public void testHasSignature_succeedsIfPackageNameAndSignaturesMatch()
throws Exception {
policy = SecurityPolicies.hasSignature(packageManager, OTHER_UID_PACKAGE_NAME, SIG2);
// THEN UID for package that has SIG2 will be authorized
assertThat(policy.checkAuthorization(OTHER_UID).getCode()).isEqualTo(Status.OK.getCode());
}
@Test
public void testHasSignature_failsIfPackageNameDoesNotMatch() throws Exception {
policy = SecurityPolicies.hasSignature(packageManager, appContext.getPackageName(), SIG1);
// THEN UID for package that has SIG1 but different package name will not be authorized
assertThat(policy.checkAuthorization(OTHER_UID_SAME_SIGNATURE).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
}
@Test
public void testHasSignature_failsIfSignatureDoesNotMatch() throws Exception {
policy = SecurityPolicies.hasSignature(packageManager, OTHER_UID_PACKAGE_NAME, SIG1);
// THEN UID for package that doesn't have SIG1 will not be authorized
assertThat(policy.checkAuthorization(OTHER_UID).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
}
@Test
public void testOneOfSignatures_succeedsIfPackageNameAndSignaturesMatch()
throws Exception {
policy =
SecurityPolicies.oneOfSignatures(
packageManager, OTHER_UID_PACKAGE_NAME, ImmutableList.of(SIG2));
// THEN UID for package that has SIG2 will be authorized
assertThat(policy.checkAuthorization(OTHER_UID).getCode()).isEqualTo(Status.OK.getCode());
}
@Test
public void testOneOfSignature_failsIfAllSignaturesDoNotMatch() throws Exception {
policy =
SecurityPolicies.oneOfSignatures(
packageManager,
appContext.getPackageName(),
ImmutableList.of(SIG1, new Signature("1314")));
// THEN UID for package that has SIG1 but different package name will not be authorized
assertThat(policy.checkAuthorization(OTHER_UID_SAME_SIGNATURE).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
}
@Test
public void testOneOfSignature_succeedsIfPackageNameAndOneOfSignaturesMatch()
throws Exception {
policy =
SecurityPolicies.oneOfSignatures(
packageManager,
OTHER_UID_PACKAGE_NAME,
ImmutableList.of(SIG1, SIG2));
// THEN UID for package that has SIG2 will be authorized
assertThat(policy.checkAuthorization(OTHER_UID).getCode()).isEqualTo(Status.OK.getCode());
}
@Test
public void testHasSignature_failsIfUidUnknown() throws Exception {
policy =
SecurityPolicies.hasSignature(
packageManager,
appContext.getPackageName(),
SIG1);
assertThat(policy.checkAuthorization(OTHER_UID_UNKNOWN).getCode())
.isEqualTo(Status.UNAUTHENTICATED.getCode());
}
@Test
public void testAllOf_succeedsIfAllSecurityPoliciesAllowed() throws Exception {
policy = SecurityPolicies.allOf(SecurityPolicies.internalOnly());
assertThat(policy.checkAuthorization(MY_UID).getCode()).isEqualTo(Status.OK.getCode());
}
@Test
public void testAllOf_failsIfOneSecurityPoliciesNotAllowed() throws Exception {
policy =
SecurityPolicies.allOf(
SecurityPolicies.internalOnly(),
SecurityPolicies.permissionDenied("Not allowed SecurityPolicy"));
assertThat(policy.checkAuthorization(MY_UID).getCode())
.isEqualTo(Status.PERMISSION_DENIED.getCode());
assertThat(policy.checkAuthorization(MY_UID).getDescription())
.contains("Not allowed SecurityPolicy");
}
}