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Code Issues Releases Wiki Activity

Extract code into new LocalKeyStore class

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Also, implement the ability to configure an alternate key store
file location. This permits the running of unit tests without
clobbering the live key store file.

Also, add a test to confirm that the key store file is being written
out and reread correctly.
This commit is contained in:
Joe Steele 2013-12-02 14:04:40 -05:00
parent eb13691918
commit 76605f7d86
4 changed files with 170 additions and 132 deletions
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4
src/com/fsck/k9/activity/setup/AccountSetupCheckSettings.java
View File

@ -22,7 +22,7 @@ import com.fsck.k9.mail.AuthenticationFailedException;
import com.fsck.k9.mail.CertificateValidationException;
import com.fsck.k9.mail.Store;
import com.fsck.k9.mail.Transport;
import com.fsck.k9.mail.store.TrustManagerFactory;
import com.fsck.k9.mail.store.LocalKeyStore;
import com.fsck.k9.mail.store.WebDavStore;
import com.fsck.k9.mail.filter.Hex;
@ -370,7 +370,7 @@ public class AccountSetupCheckSettings extends K9Activity implements OnClickList
} else {
uri = Uri.parse(mAccount.getTransportUri());
}
TrustManagerFactory.addCertificate(uri.getHost(), uri.getPort(), chain[0]);
LocalKeyStore.getInstance().addCertificate(uri.getHost(), uri.getPort(), chain[0]);
} catch (CertificateException e) {
showErrorDialog(
R.string.account_setup_failed_dlg_certificate_message_fmt,

126
src/com/fsck/k9/mail/store/LocalKeyStore.java Normal file
View File

@ -0,0 +1,126 @@
package com.fsck.k9.mail.store;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import org.apache.commons.io.IOUtils;
import android.content.Context;
import android.util.Log;
import com.fsck.k9.K9;
public class LocalKeyStore {
private static final LocalKeyStore sInstance = new LocalKeyStore();
private File mKeyStoreFile;
private KeyStore mKeyStore;
public static LocalKeyStore getInstance() {
return sInstance;
}
private LocalKeyStore() {
setKeyStoreFile(null);
}
/**
* Reinitialize the local key store with certificates contained in
* {@code file}
*
* @param file
* {@link File} containing locally saved certificates. May be 0
* length, in which case it is deleted and recreated. May be
* {@code null}, in which case a default file location is used.
*/
public synchronized void setKeyStoreFile(File file) {
if (file == null) {
file = new File(K9.app.getDir("KeyStore", Context.MODE_PRIVATE)
+ File.separator + "KeyStore.bks");
}
if (file.length() == 0) {
// The file may be empty (e.g., if it was created with
// File.createTempFile)
// We can't pass an empty file to Keystore.load. Instead, we let it
// be created anew.
file.delete();
}
FileInputStream fis = null;
try {
fis = new FileInputStream(file);
} catch (FileNotFoundException e) {
// If the file doesn't exist, that's fine, too
}
try {
KeyStore store = KeyStore.getInstance(KeyStore.getDefaultType());
store.load(fis, "".toCharArray());
mKeyStore = store;
mKeyStoreFile = file;
} catch (Exception e) {
Log.e(K9.LOG_TAG, "Failed to initialize local key store", e);
// Use of the local key store is effectively disabled.
mKeyStore = null;
mKeyStoreFile = null;
} finally {
IOUtils.closeQuietly(fis);
}
}
public synchronized void addCertificate(String host, int port,
X509Certificate certificate) throws CertificateException {
if (mKeyStore == null) {
throw new CertificateException(
"Certificate not added because key store not initialized");
}
java.io.OutputStream keyStoreStream = null;
try {
mKeyStore.setCertificateEntry(getCertKey(host, port), certificate);
keyStoreStream = new java.io.FileOutputStream(mKeyStoreFile);
mKeyStore.store(keyStoreStream, "".toCharArray());
} catch (FileNotFoundException e) {
throw new CertificateException("Unable to write KeyStore: "
+ e.getMessage());
} catch (CertificateException e) {
throw new CertificateException("Unable to write KeyStore: "
+ e.getMessage());
} catch (IOException e) {
throw new CertificateException("Unable to write KeyStore: "
+ e.getMessage());
} catch (NoSuchAlgorithmException e) {
throw new CertificateException("Unable to write KeyStore: "
+ e.getMessage());
} catch (KeyStoreException e) {
throw new CertificateException("Unable to write KeyStore: "
+ e.getMessage());
} finally {
IOUtils.closeQuietly(keyStoreStream);
}
}
public synchronized boolean isValidCertificate(Certificate certificate, String host,
int port) {
if (mKeyStore == null) {
return false;
}
Certificate storedCert = null;
try {
storedCert = mKeyStore.getCertificate(getCertKey(host, port));
return (storedCert != null && storedCert.equals(certificate));
} catch (KeyStoreException e) {
return false;
}
}
private static String getCertKey(String host, int port) {
return host + ":" + port;
}
}

98
src/com/fsck/k9/mail/store/TrustManagerFactory.java
View File

@ -1,24 +1,15 @@
package com.fsck.k9.mail.store;
import android.content.Context;
import android.util.Log;
import com.fsck.k9.K9;
import com.fsck.k9.helper.DomainNameChecker;
import com.fsck.k9.mail.CertificateChainException;
import org.apache.commons.io.IOUtils;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.HashMap;
@ -30,9 +21,7 @@ public final class TrustManagerFactory {
private static X509TrustManager defaultTrustManager;
private static X509TrustManager unsecureTrustManager;
private static File keyStoreFile;
private static KeyStore keyStore;
private static LocalKeyStore keyStore;
private static class SimpleX509TrustManager implements X509TrustManager {
public void checkClientTrusted(X509Certificate[] chain, String authType)
@ -61,7 +50,7 @@ public final class TrustManagerFactory {
}
public synchronized static X509TrustManager getInstance(String host, int port) {
String key = getCertKey(host, port);
String key = host + ":" + port;
SecureX509TrustManager trustManager;
if (mTrustManager.containsKey(key)) {
trustManager = mTrustManager.get(key);
@ -90,22 +79,16 @@ public final class TrustManagerFactory {
// Check the local key store if we couldn't verify the certificate using the global
// key store or if the host name doesn't match the certificate name
if (!foundInGlobalKeyStore || !DomainNameChecker.match(certificate, mHost)) {
try {
Certificate storedCert = keyStore.getCertificate(getCertKey(mHost, mPort));
if (storedCert != null && storedCert.equals(certificate)) {
return;
}
} catch (KeyStoreException e) {
throw new CertificateException("Certificate cannot be verified", e);
}
String message = (foundInGlobalKeyStore) ?
"Certificate domain name does not match " + mHost :
"Couldn't find certificate in local key store";
throw new CertificateChainException(message, chain);
if (foundInGlobalKeyStore
&& DomainNameChecker.match(certificate, mHost)
|| keyStore.isValidCertificate(certificate, mHost, mPort)) {
return;
}
String message = (foundInGlobalKeyStore) ?
"Certificate domain name does not match " + mHost :
"Couldn't find certificate in local key store";
throw new CertificateChainException(message, chain);
}
public X509Certificate[] getAcceptedIssuers() {
@ -116,7 +99,7 @@ public final class TrustManagerFactory {
static {
try {
loadKeyStore();
keyStore = LocalKeyStore.getInstance();
javax.net.ssl.TrustManagerFactory tmf = javax.net.ssl.TrustManagerFactory.getInstance("X509");
tmf.init((KeyStore) null);
@ -138,34 +121,6 @@ public final class TrustManagerFactory {
unsecureTrustManager = new SimpleX509TrustManager();
}
static void loadKeyStore() throws KeyStoreException, NoSuchAlgorithmException {
Context context = K9.app;
keyStoreFile = new File(context.getDir("KeyStore", Context.MODE_PRIVATE) +
File.separator + "KeyStore.bks");
keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
FileInputStream fis;
try {
fis = new FileInputStream(keyStoreFile);
} catch (FileNotFoundException e) {
// If the file doesn't exist, that's fine, too
fis = null;
}
try {
keyStore.load(fis, "".toCharArray());
} catch (IOException e) {
Log.e(LOG_TAG, "KeyStore IOException while initializing TrustManagerFactory ", e);
keyStore = null;
} catch (CertificateException e) {
Log.e(LOG_TAG, "KeyStore CertificateException while initializing TrustManagerFactory ", e);
keyStore = null;
} finally {
IOUtils.closeQuietly(fis);
}
}
private TrustManagerFactory() {
}
@ -173,33 +128,4 @@ public final class TrustManagerFactory {
return secure ? SecureX509TrustManager.getInstance(host, port) :
unsecureTrustManager;
}
public static void addCertificate(String host, int port, X509Certificate certificate) throws CertificateException {
try {
keyStore.setCertificateEntry(getCertKey(host, port), certificate);
java.io.OutputStream keyStoreStream = null;
try {
keyStoreStream = new java.io.FileOutputStream(keyStoreFile);
keyStore.store(keyStoreStream, "".toCharArray());
} catch (FileNotFoundException e) {
throw new CertificateException("Unable to write KeyStore: " + e.getMessage());
} catch (CertificateException e) {
throw new CertificateException("Unable to write KeyStore: " + e.getMessage());
} catch (IOException e) {
throw new CertificateException("Unable to write KeyStore: " + e.getMessage());
} finally {
IOUtils.closeQuietly(keyStoreStream);
}
} catch (NoSuchAlgorithmException e) {
Log.e(LOG_TAG, "Unable to get X509 Trust Manager ", e);
} catch (KeyStoreException e) {
Log.e(LOG_TAG, "Key Store exception while initializing TrustManagerFactory ", e);
}
}
private static String getCertKey(String host, int port) {
return host + ":" + port;
}
}

74
tests/src/com/fsck/k9/mail/store/TrustManagerFactoryTest.java
View File

@ -1,17 +1,11 @@
package com.fsck.k9.mail.store;
import javax.net.ssl.X509TrustManager;
import com.fsck.k9.K9;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.concurrent.CountDownLatch;
import android.app.Application;
import android.content.Context;
import android.test.AndroidTestCase;
/**
@ -56,6 +50,8 @@ public class TrustManagerFactoryTest extends AndroidTestCase {
private X509Certificate mCert1;
private X509Certificate mCert2;
private File mKeyStoreFile;
private LocalKeyStore mKeyStore;
public TrustManagerFactoryTest() throws CertificateException {
@ -68,31 +64,15 @@ public class TrustManagerFactoryTest extends AndroidTestCase {
@Override
public void setUp() throws Exception {
waitForAppInitialization();
// Hack to make sure TrustManagerFactory.loadKeyStore() can create the key store file
K9.app = new DummyApplication(getContext());
// Delete the key store file to make sure we start without any stored certificates
File keyStoreDir = getContext().getDir("KeyStore", Context.MODE_PRIVATE);
new File(keyStoreDir + File.separator + "KeyStore.bks").delete();
// Load the empty key store file
TrustManagerFactory.loadKeyStore();
mKeyStoreFile = File.createTempFile("localKeyStore", null, getContext()
.getCacheDir());
mKeyStore = LocalKeyStore.getInstance();
mKeyStore.setKeyStoreFile(mKeyStoreFile);
}
private void waitForAppInitialization() throws InterruptedException {
final CountDownLatch latch = new CountDownLatch(1);
K9.registerApplicationAware(new K9.ApplicationAware() {
@Override
public void initializeComponent(Application application) {
latch.countDown();
}
});
latch.await();
@Override
protected void tearDown() {
mKeyStoreFile.delete();
}
/**
@ -108,8 +88,8 @@ public class TrustManagerFactoryTest extends AndroidTestCase {
* if anything goes wrong
*/
public void testDifferentCertificatesOnSameServer() throws Exception {
TrustManagerFactory.addCertificate(NOT_MATCHING_HOST, PORT1, mCert1);
TrustManagerFactory.addCertificate(NOT_MATCHING_HOST, PORT2, mCert2);
mKeyStore.addCertificate(NOT_MATCHING_HOST, PORT1, mCert1);
mKeyStore.addCertificate(NOT_MATCHING_HOST, PORT2, mCert2);
X509TrustManager trustManager1 = TrustManagerFactory.get(NOT_MATCHING_HOST, PORT1, true);
X509TrustManager trustManager2 = TrustManagerFactory.get(NOT_MATCHING_HOST, PORT2, true);
@ -118,19 +98,19 @@ public class TrustManagerFactoryTest extends AndroidTestCase {
}
public void testSelfSignedCertificateMatchingHost() throws Exception {
TrustManagerFactory.addCertificate(MATCHING_HOST, PORT1, mCert1);
mKeyStore.addCertificate(MATCHING_HOST, PORT1, mCert1);
X509TrustManager trustManager = TrustManagerFactory.get(MATCHING_HOST, PORT1, true);
trustManager.checkServerTrusted(new X509Certificate[] { mCert1 }, "authType");
}
public void testSelfSignedCertificateNotMatchingHost() throws Exception {
TrustManagerFactory.addCertificate(NOT_MATCHING_HOST, PORT1, mCert1);
mKeyStore.addCertificate(NOT_MATCHING_HOST, PORT1, mCert1);
X509TrustManager trustManager = TrustManagerFactory.get(NOT_MATCHING_HOST, PORT1, true);
trustManager.checkServerTrusted(new X509Certificate[] { mCert1 }, "authType");
}
public void testWrongCertificate() throws Exception {
TrustManagerFactory.addCertificate(MATCHING_HOST, PORT1, mCert1);
mKeyStore.addCertificate(MATCHING_HOST, PORT1, mCert1);
X509TrustManager trustManager = TrustManagerFactory.get(MATCHING_HOST, PORT1, true);
boolean certificateValid;
try {
@ -143,8 +123,8 @@ public class TrustManagerFactoryTest extends AndroidTestCase {
}
public void testCertificateOfOtherHost() throws Exception {
TrustManagerFactory.addCertificate(MATCHING_HOST, PORT1, mCert1);
TrustManagerFactory.addCertificate(MATCHING_HOST, PORT2, mCert2);
mKeyStore.addCertificate(MATCHING_HOST, PORT1, mCert1);
mKeyStore.addCertificate(MATCHING_HOST, PORT2, mCert2);
X509TrustManager trustManager = TrustManagerFactory.get(MATCHING_HOST, PORT1, true);
boolean certificateValid;
@ -157,15 +137,21 @@ public class TrustManagerFactoryTest extends AndroidTestCase {
assertFalse("The certificate should have been rejected but wasn't", certificateValid);
}
private static class DummyApplication extends Application {
private final Context mContext;
public void testKeyStoreLoading() throws Exception {
mKeyStore.addCertificate(MATCHING_HOST, PORT1, mCert1);
mKeyStore.addCertificate(NOT_MATCHING_HOST, PORT2, mCert2);
assertTrue(mKeyStore.isValidCertificate(mCert1, MATCHING_HOST, PORT1));
assertTrue(mKeyStore.isValidCertificate(mCert2, NOT_MATCHING_HOST, PORT2));
DummyApplication(Context context) {
mContext = context;
}
// reload store from same file
mKeyStore.setKeyStoreFile(mKeyStoreFile);
assertTrue(mKeyStore.isValidCertificate(mCert1, MATCHING_HOST, PORT1));
assertTrue(mKeyStore.isValidCertificate(mCert2, NOT_MATCHING_HOST, PORT2));
public File getDir(String name, int mode) {
return mContext.getDir(name, mode);
}
// reload store from empty file
mKeyStoreFile.delete();
mKeyStore.setKeyStoreFile(mKeyStoreFile);
assertFalse(mKeyStore.isValidCertificate(mCert1, MATCHING_HOST, PORT1));
assertFalse(mKeyStore.isValidCertificate(mCert2, NOT_MATCHING_HOST, PORT2));
}
}