/**
* Checks if key has a passphrase
*
* @param secretKeyId
* @return true if it has a passphrase
*/
private static boolean hasPassphrase(Context context, long secretKeyId) {
// check if the key has no passphrase
try {
PGPSecretKey secretKey =
PGPHelper.getMasterKey(ProviderHelper.getPGPSecretKeyRingByKeyId(context, secretKeyId));
// PGPSecretKey secretKey =
// PGPHelper.getMasterKey(PGPMain.getSecretKeyRing(secretKeyId));
Log.d(Constants.TAG, "Check if key has no passphrase...");
PBESecretKeyDecryptor keyDecryptor =
new JcePBESecretKeyDecryptorBuilder().setProvider("SC").build("".toCharArray());
PGPPrivateKey testKey = secretKey.extractPrivateKey(keyDecryptor);
if (testKey != null) {
Log.d(Constants.TAG, "Key has no passphrase! Caches empty passphrase!");
// cache empty passphrase
PassphraseCacheService.addCachedPassphrase(context, secretKey.getKeyID(), "");
return false;
}
} catch (PGPException e) {
// silently catch
}
return true;
}
@SuppressWarnings("unchecked")
public static PGPSecretKey getMasterKey(PGPSecretKeyRing keyRing) {
if (keyRing == null) {
return null;
}
for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(keyRing.getSecretKeys())) {
if (key.isMasterKey()) {
return key;
}
}
return null;
}
public static String getFingerPrint(Context context, long keyId) {
PGPPublicKey key = ProviderHelper.getPGPPublicKeyByKeyId(context, keyId);
// if it is no public key get it from your own keys...
if (key == null) {
PGPSecretKey secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, keyId);
if (secretKey == null) {
Log.e(Constants.TAG, "Key could not be found!");
return null;
}
key = secretKey.getPublicKey();
}
return convertFingerprintToHex(key.getFingerprint(), true);
}
/**
* Replace the passed the public key on the passed in secret key.
*
* @param secretKey secret key to change
* @param publicKey new public key.
* @return a new secret key.
* @throws IllegalArgumentException if keyIDs do not match.
*/
public static PGPSecretKey replacePublicKey(PGPSecretKey secretKey, PGPPublicKey publicKey) {
if (publicKey.getKeyID() != secretKey.getKeyID()) {
throw new IllegalArgumentException("keyIDs do not match");
}
return new PGPSecretKey(secretKey.secret, publicKey);
}
@SuppressWarnings("unchecked")
public static String getMainUserId(PGPSecretKey key) {
for (String userId : new IterableIterator<String>(key.getUserIDs())) {
return userId;
}
return null;
}
public static Vector<PGPSecretKey> getUsableSigningKeys(PGPSecretKeyRing keyRing) {
Vector<PGPSecretKey> usableKeys = new Vector<PGPSecretKey>();
Vector<PGPSecretKey> signingKeys = getSigningKeys(keyRing);
PGPSecretKey masterKey = null;
for (int i = 0; i < signingKeys.size(); ++i) {
PGPSecretKey key = signingKeys.get(i);
if (key.isMasterKey()) {
masterKey = key;
} else {
usableKeys.add(key);
}
}
if (masterKey != null) {
usableKeys.add(masterKey);
}
return usableKeys;
}
/**
* If an Intent gives a signatureMasterKeyId and/or encryptionMasterKeyIds, preselect those!
*
* @param preselectedSignatureKeyId
* @param preselectedEncryptionKeyIds
*/
private void preselectKeys(
long preselectedSignatureKeyId,
long[] preselectedEncryptionKeyIds,
ProviderHelper providerHelper) {
if (preselectedSignatureKeyId != 0) {
// TODO: don't use bouncy castle objects!
try {
PGPSecretKeyRing keyRing =
providerHelper.getPGPSecretKeyRingWithKeyId(preselectedSignatureKeyId);
PGPSecretKey masterKey = keyRing.getSecretKey();
if (masterKey != null) {
PGPSecretKey signKey = PgpKeyHelper.getFirstSigningSubkey(keyRing);
if (signKey != null) {
setSignatureKeyId(masterKey.getKeyID());
}
}
} catch (ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
}
}
if (preselectedEncryptionKeyIds != null) {
Vector<Long> goodIds = new Vector<Long>();
for (int i = 0; i < preselectedEncryptionKeyIds.length; ++i) {
// TODO One query per selected key?! wtf
try {
long id =
providerHelper.getMasterKeyId(
KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(
Long.toString(preselectedEncryptionKeyIds[i])));
goodIds.add(id);
} catch (ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
}
}
if (goodIds.size() > 0) {
long[] keyIds = new long[goodIds.size()];
for (int i = 0; i < goodIds.size(); ++i) {
keyIds[i] = goodIds.get(i);
}
setEncryptionKeyIds(keyIds);
}
}
}
public static long getDecryptionKeyId(Context context, InputStream inputStream)
throws PgpGeneralException, NoAsymmetricEncryptionException, IOException {
InputStream in = PGPUtil.getDecoderStream(inputStream);
PGPObjectFactory pgpF = new PGPObjectFactory(in);
PGPEncryptedDataList enc;
Object o = pgpF.nextObject();
// the first object might be a PGP marker packet.
if (o instanceof PGPEncryptedDataList) {
enc = (PGPEncryptedDataList) o;
} else {
enc = (PGPEncryptedDataList) pgpF.nextObject();
}
if (enc == null) {
throw new PgpGeneralException(context.getString(R.string.error_invalid_data));
}
// TODO: currently we always only look at the first known key
// find the secret key
PGPSecretKey secretKey = null;
Iterator<?> it = enc.getEncryptedDataObjects();
boolean gotAsymmetricEncryption = false;
while (it.hasNext()) {
Object obj = it.next();
if (obj instanceof PGPPublicKeyEncryptedData) {
gotAsymmetricEncryption = true;
PGPPublicKeyEncryptedData pbe = (PGPPublicKeyEncryptedData) obj;
secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, pbe.getKeyID());
if (secretKey != null) {
break;
}
}
}
if (!gotAsymmetricEncryption) {
throw new NoAsymmetricEncryptionException();
}
if (secretKey == null) {
return Id.key.none;
}
return secretKey.getKeyID();
}
public static boolean isSigningKey(PGPSecretKey key) {
return isSigningKey(key.getPublicKey());
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.edit_key);
mActionBar = getSupportActionBar();
mActionBar.setDisplayShowTitleEnabled(true);
// set actionbar without home button if called from another app
if (getCallingPackage() != null && getCallingPackage().equals(Constants.PACKAGE_NAME)) {
mActionBar.setDisplayHomeAsUpEnabled(true);
mActionBar.setHomeButtonEnabled(true);
} else {
mActionBar.setDisplayHomeAsUpEnabled(false);
mActionBar.setHomeButtonEnabled(false);
}
// find views
mChangePassPhrase = (Button) findViewById(R.id.edit_key_btn_change_pass_phrase);
mNoPassphrase = (CheckBox) findViewById(R.id.edit_key_no_passphrase);
mUserIds = new Vector<String>();
mKeys = new Vector<PGPSecretKey>();
mKeysUsages = new Vector<Integer>();
// Catch Intents opened from other apps
mIntent = getIntent();
// Handle intents
Bundle extras = mIntent.getExtras();
if (ACTION_CREATE_KEY.equals(mIntent.getAction())) {
mActionBar.setTitle(R.string.title_createKey);
mCurrentPassPhrase = "";
if (extras != null) {
// if userId is given, prefill the fields
if (extras.containsKey(EXTRA_USER_IDS)) {
Log.d(Constants.TAG, "UserIds are given!");
mUserIds.add(extras.getString(EXTRA_USER_IDS));
}
// if no passphrase is given
if (extras.containsKey(EXTRA_NO_PASSPHRASE)) {
boolean noPassphrase = extras.getBoolean(EXTRA_NO_PASSPHRASE);
if (noPassphrase) {
// check "no passphrase" checkbox and remove button
mNoPassphrase.setChecked(true);
mChangePassPhrase.setVisibility(View.GONE);
}
}
// generate key
if (extras.containsKey(EXTRA_GENERATE_DEFAULT_KEYS)) {
boolean generateDefaultKeys = extras.getBoolean(EXTRA_GENERATE_DEFAULT_KEYS);
if (generateDefaultKeys) {
// build layout in handler after generating keys not directly in onCreate
mBuildLayout = false;
// Send all information needed to service generate keys in other thread
Intent intent = new Intent(this, ApgService.class);
intent.putExtra(ApgService.EXTRA_ACTION, ApgService.ACTION_GENERATE_DEFAULT_RSA_KEYS);
// fill values for this action
Bundle data = new Bundle();
data.putString(ApgService.SYMMETRIC_PASSPHRASE, mCurrentPassPhrase);
intent.putExtra(ApgService.EXTRA_DATA, data);
// show progress dialog
mGeneratingDialog =
ProgressDialogFragment.newInstance(
R.string.progress_generating, ProgressDialog.STYLE_SPINNER);
// Message is received after generating is done in ApgService
ApgHandler saveHandler =
new ApgHandler(this, mGeneratingDialog) {
public void handleMessage(Message message) {
// handle messages by standard ApgHandler first
super.handleMessage(message);
if (message.arg1 == ApgHandler.MESSAGE_OKAY) {
// get new key from data bundle returned from service
Bundle data = message.getData();
PGPSecretKeyRing masterKeyRing =
PGPConversionHelper.BytesToPGPSecretKeyRing(
data.getByteArray(ApgService.RESULT_NEW_KEY));
PGPSecretKeyRing subKeyRing =
PGPConversionHelper.BytesToPGPSecretKeyRing(
data.getByteArray(ApgService.RESULT_NEW_KEY2));
// add master key
Iterator<PGPSecretKey> masterIt = masterKeyRing.getSecretKeys();
mKeys.add(masterIt.next());
mKeysUsages.add(Id.choice.usage.sign_only);
// add sub key
Iterator<PGPSecretKey> subIt = subKeyRing.getSecretKeys();
subIt.next(); // masterkey
mKeys.add(subIt.next());
mKeysUsages.add(Id.choice.usage.encrypt_only);
buildLayout();
}
};
};
// Create a new Messenger for the communication back
Messenger messenger = new Messenger(saveHandler);
intent.putExtra(ApgService.EXTRA_MESSENGER, messenger);
mGeneratingDialog.show(getSupportFragmentManager(), "dialog");
// start service with intent
startService(intent);
}
}
}
} else if (ACTION_EDIT_KEY.equals(mIntent.getAction())) {
mActionBar.setTitle(R.string.title_editKey);
mCurrentPassPhrase = PGPMain.getEditPassPhrase();
if (mCurrentPassPhrase == null) {
mCurrentPassPhrase = "";
}
if (mCurrentPassPhrase.equals("")) {
// check "no passphrase" checkbox and remove button
mNoPassphrase.setChecked(true);
mChangePassPhrase.setVisibility(View.GONE);
}
if (extras != null) {
if (extras.containsKey(EXTRA_KEY_ID)) {
long keyId = mIntent.getExtras().getLong(EXTRA_KEY_ID);
if (keyId != 0) {
PGPSecretKey masterKey = null;
mKeyRing = PGPMain.getSecretKeyRing(keyId);
if (mKeyRing != null) {
masterKey = PGPHelper.getMasterKey(mKeyRing);
for (PGPSecretKey key :
new IterableIterator<PGPSecretKey>(mKeyRing.getSecretKeys())) {
mKeys.add(key);
mKeysUsages.add(-1); // get usage when view is created
}
}
if (masterKey != null) {
for (String userId : new IterableIterator<String>(masterKey.getUserIDs())) {
mUserIds.add(userId);
}
}
}
}
}
}
mChangePassPhrase.setOnClickListener(
new OnClickListener() {
public void onClick(View v) {
showDialog(Id.dialog.new_pass_phrase);
}
});
// disable passphrase when no passphrase checkobox is checked!
mNoPassphrase.setOnCheckedChangeListener(
new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
// remove passphrase
mNewPassPhrase = null;
mChangePassPhrase.setVisibility(View.GONE);
} else {
mChangePassPhrase.setVisibility(View.VISIBLE);
}
}
});
if (mBuildLayout) {
buildLayout();
}
}
public static boolean isSecretKeyPrivateEmpty(PGPSecretKey secretKey) {
return secretKey.isPrivateKeyEmpty();
}
public static Date getCreationDate(PGPSecretKey key) {
return key.getPublicKey().getCreationTime();
}
public static Date getExpiryDate(PGPSecretKey key) {
return getExpiryDate(key.getPublicKey());
}
public static String getAlgorithmInfo(PGPSecretKey key) {
return getAlgorithmInfo(key.getPublicKey());
}
public static boolean isCertificationKey(PGPSecretKey key) {
return isCertificationKey(key.getPublicKey());
}
/**
* Return a copy of the passed in secret key, encrypted using a new password and the passed in
* algorithm.
*
* @param key the PGPSecretKey to be copied.
* @param oldKeyDecryptor the current decryptor based on the current password for key.
* @param newKeyEncryptor a new encryptor based on a new password for encrypting the secret key
* material.
*/
public static PGPSecretKey copyWithNewPassword(
PGPSecretKey key,
PBESecretKeyDecryptor oldKeyDecryptor,
PBESecretKeyEncryptor newKeyEncryptor)
throws PGPException {
if (key.isPrivateKeyEmpty()) {
throw new PGPException("no private key in this SecretKey - public key present only.");
}
byte[] rawKeyData = key.extractKeyData(oldKeyDecryptor);
int s2kUsage = key.secret.getS2KUsage();
byte[] iv = null;
S2K s2k = null;
byte[] keyData;
int newEncAlgorithm = SymmetricKeyAlgorithmTags.NULL;
if (newKeyEncryptor == null
|| newKeyEncryptor.getAlgorithm() == SymmetricKeyAlgorithmTags.NULL) {
s2kUsage = SecretKeyPacket.USAGE_NONE;
if (key.secret.getS2KUsage()
== SecretKeyPacket.USAGE_SHA1) // SHA-1 hash, need to rewrite checksum
{
keyData = new byte[rawKeyData.length - 18];
System.arraycopy(rawKeyData, 0, keyData, 0, keyData.length - 2);
byte[] check = checksum(null, keyData, keyData.length - 2);
keyData[keyData.length - 2] = check[0];
keyData[keyData.length - 1] = check[1];
} else {
keyData = rawKeyData;
}
} else {
if (key.secret.getPublicKeyPacket().getVersion() < 4) {
// Version 2 or 3 - RSA Keys only
byte[] encKey = newKeyEncryptor.getKey();
keyData = new byte[rawKeyData.length];
if (newKeyEncryptor.getS2K() != null) {
throw new PGPException("MD5 Digest Calculator required for version 3 key encryptor.");
}
//
// process 4 numbers
//
int pos = 0;
for (int i = 0; i != 4; i++) {
int encLen = (((rawKeyData[pos] << 8) | (rawKeyData[pos + 1] & 0xff)) + 7) / 8;
keyData[pos] = rawKeyData[pos];
keyData[pos + 1] = rawKeyData[pos + 1];
byte[] tmp;
if (i == 0) {
tmp = newKeyEncryptor.encryptKeyData(encKey, rawKeyData, pos + 2, encLen);
iv = newKeyEncryptor.getCipherIV();
} else {
byte[] tmpIv = new byte[iv.length];
System.arraycopy(keyData, pos - iv.length, tmpIv, 0, tmpIv.length);
tmp = newKeyEncryptor.encryptKeyData(encKey, tmpIv, rawKeyData, pos + 2, encLen);
}
System.arraycopy(tmp, 0, keyData, pos + 2, tmp.length);
pos += 2 + encLen;
}
//
// copy in checksum.
//
keyData[pos] = rawKeyData[pos];
keyData[pos + 1] = rawKeyData[pos + 1];
s2k = newKeyEncryptor.getS2K();
newEncAlgorithm = newKeyEncryptor.getAlgorithm();
} else {
keyData = newKeyEncryptor.encryptKeyData(rawKeyData, 0, rawKeyData.length);
iv = newKeyEncryptor.getCipherIV();
s2k = newKeyEncryptor.getS2K();
newEncAlgorithm = newKeyEncryptor.getAlgorithm();
}
}
SecretKeyPacket secret;
if (key.secret instanceof SecretSubkeyPacket) {
secret =
new SecretSubkeyPacket(
key.secret.getPublicKeyPacket(), newEncAlgorithm, s2kUsage, s2k, iv, keyData);
} else {
secret =
new SecretKeyPacket(
key.secret.getPublicKeyPacket(), newEncAlgorithm, s2kUsage, s2k, iv, keyData);
}
return new PGPSecretKey(secret, key.pub);
}
public static boolean isEncryptionKey(PGPSecretKey key) {
return isEncryptionKey(key.getPublicKey());
}
