Use new officially supported way for local unit tests, many dependencies upgraded for this, temporary disabled separate debug builds

1 files changed, 587 insertions, 0 deletions

diff --git a/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java b/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java
new file mode 100644
index 000000000..47b0a3e26
--- /dev/null
+++ b/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java
@@ -0,0 +1,587 @@
+/*
+ * Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.pgp;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.openintents.openpgp.OpenPgpMetadata;
+import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.robolectric.*;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowLog;
+import org.spongycastle.bcpg.sig.KeyFlags;
+import org.spongycastle.jce.provider.BouncyCastleProvider;
+import org.spongycastle.openpgp.PGPEncryptedData;
+import org.sufficientlysecure.keychain.BuildConfig;
+import org.sufficientlysecure.keychain.operations.results.OperationResult.LogType;
+import org.sufficientlysecure.keychain.operations.results.PgpEditKeyResult;
+import org.sufficientlysecure.keychain.operations.results.PgpSignEncryptResult;
+import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRingData;
+import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.service.SaveKeyringParcel;
+import org.sufficientlysecure.keychain.service.SaveKeyringParcel.Algorithm;
+import org.sufficientlysecure.keychain.operations.results.DecryptVerifyResult;
+import org.sufficientlysecure.keychain.service.SaveKeyringParcel.ChangeUnlockParcel;
+import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
+import org.sufficientlysecure.keychain.service.input.RequiredInputParcel.RequiredInputType;
+import org.sufficientlysecure.keychain.support.KeyringTestingHelper;
+import org.sufficientlysecure.keychain.util.InputData;
+import org.sufficientlysecure.keychain.util.Passphrase;
+import org.sufficientlysecure.keychain.util.ProgressScaler;
+import org.sufficientlysecure.keychain.util.TestingUtils;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.security.Security;
+import java.util.HashSet;
+
+@RunWith(RobolectricGradleTestRunner.class)
+@Config(constants = BuildConfig.class, sdk = 21, manifest = "src/main/AndroidManifest.xml")
+public class PgpEncryptDecryptTest {
+
+    static Passphrase mPassphrase = TestingUtils.genPassphrase(true);
+
+    static UncachedKeyRing mStaticRing1, mStaticRing2;
+    static Passphrase mKeyPhrase1 = TestingUtils.genPassphrase(true);
+    static Passphrase mKeyPhrase2 = TestingUtils.genPassphrase(true);
+
+    static PrintStream oldShadowStream;
+
+    @BeforeClass
+    public static void setUpOnce() throws Exception {
+        Security.insertProviderAt(new BouncyCastleProvider(), 1);
+        oldShadowStream = ShadowLog.stream;
+        // ShadowLog.stream = System.out;
+
+        PgpKeyOperation op = new PgpKeyOperation(null);
+
+        {
+            SaveKeyringParcel parcel = new SaveKeyringParcel();
+            parcel.mAddSubKeys.add(new SaveKeyringParcel.SubkeyAdd(
+                    Algorithm.RSA, 1024, null, KeyFlags.CERTIFY_OTHER, 0L));
+            parcel.mAddSubKeys.add(new SaveKeyringParcel.SubkeyAdd(
+                    Algorithm.DSA, 1024, null, KeyFlags.SIGN_DATA, 0L));
+            parcel.mAddSubKeys.add(new SaveKeyringParcel.SubkeyAdd(
+                    Algorithm.ELGAMAL, 1024, null, KeyFlags.ENCRYPT_COMMS, 0L));
+            parcel.mAddUserIds.add("bloom");
+            parcel.mNewUnlock = new ChangeUnlockParcel(mKeyPhrase1);
+
+            PgpEditKeyResult result = op.createSecretKeyRing(parcel);
+            Assert.assertTrue("initial test key creation must succeed", result.success());
+            Assert.assertNotNull("initial test key creation must succeed", result.getRing());
+
+            mStaticRing1 = result.getRing();
+        }
+
+        {
+            SaveKeyringParcel parcel = new SaveKeyringParcel();
+            parcel.mAddSubKeys.add(new SaveKeyringParcel.SubkeyAdd(
+                    Algorithm.RSA, 1024, null, KeyFlags.CERTIFY_OTHER, 0L));
+            parcel.mAddSubKeys.add(new SaveKeyringParcel.SubkeyAdd(
+                    Algorithm.DSA, 1024, null, KeyFlags.SIGN_DATA, 0L));
+            parcel.mAddSubKeys.add(new SaveKeyringParcel.SubkeyAdd(
+                    Algorithm.ELGAMAL, 1024, null, KeyFlags.ENCRYPT_COMMS, 0L));
+            parcel.mAddUserIds.add("belle");
+            parcel.mNewUnlock = new ChangeUnlockParcel(mKeyPhrase2);
+
+            PgpEditKeyResult result = op.createSecretKeyRing(parcel);
+            Assert.assertTrue("initial test key creation must succeed", result.success());
+            Assert.assertNotNull("initial test key creation must succeed", result.getRing());
+
+            mStaticRing2 = result.getRing();
+        }
+
+    }
+
+    @Before
+    public void setUp() {
+        ProviderHelper providerHelper = new ProviderHelper(RuntimeEnvironment.application);
+
+        // don't log verbosely here, we're not here to test imports
+        ShadowLog.stream = oldShadowStream;
+
+        providerHelper.saveSecretKeyRing(mStaticRing1, new ProgressScaler());
+        providerHelper.saveSecretKeyRing(mStaticRing2, new ProgressScaler());
+
+        // ok NOW log verbosely!
+        ShadowLog.stream = System.out;
+    }
+
+    @Test
+    public void testSymmetricEncryptDecrypt() {
+
+        String plaintext = "dies ist ein plaintext ☭" + TestingUtils.genPassphrase(true);
+        byte[] ciphertext;
+
+        { // encrypt data with a given passphrase
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(plaintext.getBytes());
+
+            PgpSignEncryptOperation op = new PgpSignEncryptOperation(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+
+            InputData data = new InputData(in, in.available());
+
+            PgpSignEncryptInputParcel b = new PgpSignEncryptInputParcel();
+            b.setSymmetricPassphrase(mPassphrase);
+            b.setSymmetricEncryptionAlgorithm(PGPEncryptedData.AES_128);
+
+            PgpSignEncryptResult result = op.execute(b, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("encryption must succeed", result.success());
+
+            ciphertext = out.toByteArray();
+        }
+
+        { // decryption with same passphrase should yield the same result
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = new PgpDecryptVerify(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            input.setAllowSymmetricDecryption(true);
+            DecryptVerifyResult result = op.execute(
+                    input, new CryptoInputParcel(mPassphrase), data, out);
+
+            Assert.assertTrue("decryption must succeed", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertNull("signature should be an error", result.getSignatureResult());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
+        }
+
+        { // decryption with a bad passphrase should fail
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = new PgpDecryptVerify(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            input.setAllowSymmetricDecryption(true);
+            DecryptVerifyResult result = op.execute(input,
+                    new CryptoInputParcel(new Passphrase(new String(mPassphrase.getCharArray()) + "x")),
+                    data, out);
+
+            Assert.assertFalse("decryption must fail", result.success());
+            Assert.assertEquals("decrypted plaintext should be empty", 0, out.size());
+            Assert.assertNull("signature should be an error", result.getSignatureResult());
+        }
+
+        { // decryption with an unset passphrase should fail
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = new PgpDecryptVerify(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            input.setAllowSymmetricDecryption(true);
+            DecryptVerifyResult result = op.execute(input,
+                    new CryptoInputParcel(), data, out);
+
+            Assert.assertFalse("decryption must fail", result.success());
+            Assert.assertEquals("decrypted plaintext should be empty", 0, out.size());
+            Assert.assertNull("signature should be an error", result.getSignatureResult());
+        }
+
+        { // decryption if symmetric decryption isn't allowed should fail
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = new PgpDecryptVerify(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            input.setAllowSymmetricDecryption(false);
+            DecryptVerifyResult result = op.execute(input,
+                    new CryptoInputParcel(), data, out);
+
+            Assert.assertFalse("decryption must fail", result.success());
+            Assert.assertEquals("decrypted plaintext should be empty", 0, out.size());
+            Assert.assertNull("signature should be an error", result.getSignatureResult());
+        }
+
+    }
+
+    @Test
+    public void testAsymmetricEncryptDecrypt() {
+
+        String plaintext = "dies ist ein plaintext ☭" + TestingUtils.genPassphrase(true);
+        byte[] ciphertext;
+
+        { // encrypt data with key
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(plaintext.getBytes());
+
+            PgpSignEncryptOperation op = new PgpSignEncryptOperation(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+
+            InputData data = new InputData(in, in.available());
+            PgpSignEncryptInputParcel input = new PgpSignEncryptInputParcel();
+
+            input.setEncryptionMasterKeyIds(new long[] { mStaticRing1.getMasterKeyId() });
+            input.setSymmetricEncryptionAlgorithm(PGPEncryptedData.AES_128);
+            PgpSignEncryptResult result = op.execute(input, new CryptoInputParcel(), data, out);
+            Assert.assertTrue("encryption must succeed", result.success());
+
+            ciphertext = out.toByteArray();
+        }
+
+        { // decryption with provided passphrase should yield the same result
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(null, null, null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(mKeyPhrase1), data, out);
+
+            Assert.assertTrue("decryption with provided passphrase must succeed", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with provided passphrase should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertNull("signature be empty", result.getSignatureResult());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
+
+        }
+
+        { // decryption with passphrase cached should succeed
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase1, mStaticRing1.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("decryption with cached passphrase must succeed", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertNull("signature should be empty", result.getSignatureResult());
+        }
+
+        { // decryption with no passphrase provided should return status pending
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    null, mStaticRing1.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertFalse("decryption with no passphrase must return pending", result.success());
+            Assert.assertTrue("decryption with no passphrase should return pending", result.isPending());
+            Assert.assertEquals("decryption with no passphrase should return pending passphrase",
+                    RequiredInputType.PASSPHRASE, result.getRequiredInputParcel().mType);
+        }
+
+    }
+
+    @Test
+    public void testMultiAsymmetricEncryptDecrypt() {
+
+        String plaintext = "dies ist ein plaintext ☭" + TestingUtils.genPassphrase(true);
+        byte[] ciphertext;
+
+        { // encrypt data with a given passphrase
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(plaintext.getBytes());
+
+            PgpSignEncryptOperation op = new PgpSignEncryptOperation(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+
+            InputData data = new InputData(in, in.available());
+
+            PgpSignEncryptInputParcel b = new PgpSignEncryptInputParcel();
+            b.setEncryptionMasterKeyIds(new long[] {
+                    mStaticRing1.getMasterKeyId(),
+                    mStaticRing2.getMasterKeyId()
+            });
+            b.setSymmetricEncryptionAlgorithm(PGPEncryptedData.AES_128);
+
+            PgpSignEncryptResult result = op.execute(b, new CryptoInputParcel(), data, out);
+            Assert.assertTrue("encryption must succeed", result.success());
+
+            ciphertext = out.toByteArray();
+        }
+
+        { // decryption with passphrase cached should succeed for the first key
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase1, mStaticRing1.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("decryption with cached passphrase must succeed for the first key", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertNull("signature should be empty", result.getSignatureResult());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
+        }
+
+        { // decryption should succeed if key is allowed
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            // allow only the second to decrypt
+            HashSet<Long> allowed = new HashSet<>();
+            allowed.add(mStaticRing2.getMasterKeyId());
+
+            // provide passphrase for the second, and check that the first is never asked for!
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase2, mStaticRing2.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            input.setAllowedKeyIds(allowed);
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("decryption with cached passphrase must succeed for allowed key", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertTrue("other key was skipped", result.getLog().containsType(LogType.MSG_DC_ASKIP_NOT_ALLOWED));
+            Assert.assertNull("signature should be empty", result.getSignatureResult());
+        }
+
+        { // decryption should fail if no key is allowed
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            // provide passphrase for the second, and check that the first is never asked for!
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase2, mStaticRing2.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            input.setAllowedKeyIds(new HashSet<Long>());
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertFalse("decryption must fail if no key allowed", result.success());
+            Assert.assertEquals("decryption must fail with key disllowed status",
+                    DecryptVerifyResult.RESULT_KEY_DISALLOWED, result.getResult());
+
+        }
+
+        { // decryption with passphrase cached should succeed for the other key if first is gone
+
+            // delete first key from database
+            new ProviderHelper(RuntimeEnvironment.application).getContentResolver().delete(
+                    KeyRingData.buildPublicKeyRingUri(mStaticRing1.getMasterKeyId()), null, null
+            );
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase2, mStaticRing2.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("decryption with cached passphrase must succeed", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertNull("signature should be empty", result.getSignatureResult());
+        }
+
+    }
+
+    @Test
+    public void testMultiAsymmetricSignEncryptDecryptVerify() {
+
+        String plaintext = "dies ist ein plaintext ☭" + TestingUtils.genPassphrase(true);
+        byte[] ciphertext;
+
+        { // encrypt data with a given passphrase
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(plaintext.getBytes());
+
+            PgpSignEncryptOperation op = new PgpSignEncryptOperation(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+
+            InputData data = new InputData(in, in.available());
+            PgpSignEncryptInputParcel b = new PgpSignEncryptInputParcel();
+
+            b.setEncryptionMasterKeyIds(new long[] {
+                    mStaticRing1.getMasterKeyId(),
+                    mStaticRing2.getMasterKeyId()
+            });
+            b.setSignatureMasterKeyId(mStaticRing1.getMasterKeyId());
+            b.setSignatureSubKeyId(KeyringTestingHelper.getSubkeyId(mStaticRing1, 1));
+            b.setSymmetricEncryptionAlgorithm(PGPEncryptedData.AES_128);
+
+            PgpSignEncryptResult result = op.execute(b, new CryptoInputParcel(mKeyPhrase1), data, out);
+            Assert.assertTrue("encryption must succeed", result.success());
+
+            ciphertext = out.toByteArray();
+        }
+
+        { // decryption with passphrase cached should succeed for the first key
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase1, mStaticRing1.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("decryption with cached passphrase must succeed for the first key", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertEquals("signature should be verified and certified",
+                    OpenPgpSignatureResult.SIGNATURE_SUCCESS_CERTIFIED, result.getSignatureResult().getStatus());
+
+            OpenPgpMetadata metadata = result.getDecryptMetadata();
+            Assert.assertEquals("filesize must be correct",
+                    out.toByteArray().length, metadata.getOriginalSize());
+        }
+
+        { // decryption with passphrase cached should succeed for the other key if first is gone
+
+            // delete first key from database
+            new ProviderHelper(RuntimeEnvironment.application).getContentResolver().delete(
+                    KeyRingData.buildPublicKeyRingUri(mStaticRing1.getMasterKeyId()), null, null
+            );
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(
+                    mKeyPhrase2, mStaticRing2.getMasterKeyId(), null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(), data, out);
+
+            Assert.assertTrue("decryption with cached passphrase must succeed", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext with cached passphrase  should equal plaintext",
+                    out.toByteArray(), plaintext.getBytes());
+            Assert.assertEquals("signature key should be missing",
+                    OpenPgpSignatureResult.SIGNATURE_KEY_MISSING,
+                    result.getSignatureResult().getStatus());
+        }
+
+    }
+
+    @Test
+    public void testForeignEncoding() throws Exception {
+        String plaintext = "ウィキペディア";
+        byte[] plaindata = plaintext.getBytes("iso-2022-jp");
+
+        { // some quick sanity checks
+            Assert.assertEquals(plaintext, new String(plaindata, "iso-2022-jp"));
+            Assert.assertNotEquals(plaintext, new String(plaindata, "utf-8"));
+        }
+
+        byte[] ciphertext;
+        { // encrypt data with a given passphrase
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(plaindata);
+
+            PgpSignEncryptOperation op = new PgpSignEncryptOperation(RuntimeEnvironment.application,
+                    new ProviderHelper(RuntimeEnvironment.application), null);
+
+            InputData data = new InputData(in, in.available());
+            PgpSignEncryptInputParcel b = new PgpSignEncryptInputParcel();
+
+            b.setEncryptionMasterKeyIds(new long[] { mStaticRing1.getMasterKeyId() });
+            b.setSymmetricEncryptionAlgorithm(PGPEncryptedData.AES_128);
+            // this only works with ascii armored output!
+            b.setEnableAsciiArmorOutput(true);
+            b.setCharset("iso-2022-jp");
+            PgpSignEncryptResult result = op.execute(b, new CryptoInputParcel(), data, out);
+            Assert.assertTrue("encryption must succeed", result.success());
+
+            ciphertext = out.toByteArray();
+        }
+
+        { // decryption with provided passphrase should yield the same result
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            ByteArrayInputStream in = new ByteArrayInputStream(ciphertext);
+            InputData data = new InputData(in, in.available());
+
+            PgpDecryptVerify op = operationWithFakePassphraseCache(null, null, null);
+            PgpDecryptVerifyInputParcel input = new PgpDecryptVerifyInputParcel();
+            DecryptVerifyResult result = op.execute(input, new CryptoInputParcel(mKeyPhrase1), data, out);
+
+            Assert.assertTrue("decryption with provided passphrase must succeed", result.success());
+            Assert.assertArrayEquals("decrypted ciphertext should equal plaintext bytes",
+                    out.toByteArray(), plaindata);
+            Assert.assertEquals("charset should be read correctly",
+                    "iso-2022-jp", result.getCharset());
+            Assert.assertEquals("decrypted ciphertext should equal plaintext",
+                    new String(out.toByteArray(), result.getCharset()), plaintext);
+            Assert.assertNull("signature be empty", result.getSignatureResult());
+        }
+
+    }
+
+    private PgpDecryptVerify operationWithFakePassphraseCache(
+            final Passphrase passphrase, final Long checkMasterKeyId, final Long checkSubKeyId) {
+
+        return new PgpDecryptVerify(RuntimeEnvironment.application,
+                new ProviderHelper(RuntimeEnvironment.application), null) {
+            @Override
+            public Passphrase getCachedPassphrase(long masterKeyId, long subKeyId)
+                    throws NoSecretKeyException {
+                if (checkMasterKeyId != null) {
+                    Assert.assertEquals("requested passphrase should be for expected master key id",
+                            (long) checkMasterKeyId, masterKeyId);
+                }
+                if (checkSubKeyId != null) {
+                    Assert.assertEquals("requested passphrase should be for expected sub key id",
+                            (long) checkSubKeyId, subKeyId);
+                }
+                if (passphrase == null) {
+                    return null;
+                }
+                return passphrase;
+            }
+        };
+    }
+}
\ No newline at end of file