open-keychain/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java

674 lines
29 KiB
Java

/*
* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* 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.provider;
import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.OperationApplicationException;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.net.Uri;
import android.os.RemoteException;
import org.spongycastle.bcpg.ArmoredOutputStream;
import org.spongycastle.openpgp.PGPException;
import org.spongycastle.openpgp.PGPKeyRing;
import org.spongycastle.openpgp.PGPPublicKey;
import org.spongycastle.openpgp.PGPPublicKeyRing;
import org.spongycastle.openpgp.PGPSecretKeyRing;
import org.spongycastle.openpgp.PGPSignature;
import org.spongycastle.openpgp.operator.jcajce.JcaPGPContentVerifierBuilderProvider;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.pgp.PgpConversionHelper;
import org.sufficientlysecure.keychain.pgp.PgpHelper;
import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
import org.sufficientlysecure.keychain.provider.KeychainContract.ApiApps;
import org.sufficientlysecure.keychain.provider.KeychainContract.Certs;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRingData;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.provider.KeychainContract.Keys;
import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds;
import org.sufficientlysecure.keychain.remote.AccountSettings;
import org.sufficientlysecure.keychain.remote.AppSettings;
import org.sufficientlysecure.keychain.util.IterableIterator;
import org.sufficientlysecure.keychain.util.Log;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.security.SignatureException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class ProviderHelper {
// If we ever switch to api level 11, we can ditch this whole mess!
public static final int FIELD_TYPE_NULL = 1;
// this is called integer to stay coherent with the constants in Cursor (api level 11)
public static final int FIELD_TYPE_INTEGER = 2;
public static final int FIELD_TYPE_FLOAT = 3;
public static final int FIELD_TYPE_STRING = 4;
public static final int FIELD_TYPE_BLOB = 5;
public static Object getGenericData(Context context, Uri uri, String column, int type) {
return getGenericData(context, uri, new String[] { column }, new int[] { type }).get(column);
}
public static HashMap<String,Object> getGenericData(Context context, Uri uri, String[] proj, int[] types) {
Cursor cursor = context.getContentResolver().query(uri, proj, null, null, null);
HashMap<String, Object> result = new HashMap<String, Object>(proj.length);
if (cursor != null && cursor.moveToFirst()) {
int pos = 0;
for(String p : proj) {
switch(types[pos]) {
case FIELD_TYPE_NULL: result.put(p, cursor.isNull(pos)); break;
case FIELD_TYPE_INTEGER: result.put(p, cursor.getLong(pos)); break;
case FIELD_TYPE_FLOAT: result.put(p, cursor.getFloat(pos)); break;
case FIELD_TYPE_STRING: result.put(p, cursor.getString(pos)); break;
case FIELD_TYPE_BLOB: result.put(p, cursor.getBlob(pos)); break;
}
pos += 1;
}
}
if (cursor != null) {
cursor.close();
}
return result;
}
public static Object getUnifiedData(Context context, long masterKeyId, String column, int type) {
return getUnifiedData(context, masterKeyId, new String[] { column }, new int[] { type }).get(column);
}
public static HashMap<String,Object> getUnifiedData(Context context, long masterKeyId, String[] proj, int[] types) {
return getGenericData(context, KeyRings.buildUnifiedKeyRingUri(Long.toString(masterKeyId)), proj, types);
}
/**
* Find the master key id related to a given query. The id will either be extracted from the
* query, which should work for all specific /key_rings/ queries, or will be queried if it can't.
*/
public static long getMasterKeyId(Context context, Uri queryUri) {
// try extracting from the uri first
String firstSegment = queryUri.getPathSegments().get(1);
if(!firstSegment.equals("find")) try {
return Long.parseLong(firstSegment);
} catch(NumberFormatException e) {
// didn't work? oh well.
Log.d(Constants.TAG, "Couldn't get masterKeyId from URI, querying...");
}
Object data = getGenericData(context, queryUri, KeyRings.MASTER_KEY_ID, FIELD_TYPE_INTEGER);
if(data != null)
return (Long) data;
// TODO better error handling?
return 0L;
}
public static Map<Long, PGPKeyRing> getPGPKeyRings(Context context, Uri queryUri) {
Cursor cursor = context.getContentResolver().query(queryUri,
new String[]{KeyRingData.MASTER_KEY_ID, KeyRingData.KEY_RING_DATA },
null, null, null);
Map<Long, PGPKeyRing> result = new HashMap<Long, PGPKeyRing>(cursor.getCount());
if (cursor != null && cursor.moveToFirst()) do {
long masterKeyId = cursor.getLong(0);
byte[] data = cursor.getBlob(1);
if (data != null) {
result.put(masterKeyId, PgpConversionHelper.BytesToPGPKeyRing(data));
}
} while(cursor.moveToNext());
if (cursor != null) {
cursor.close();
}
return result;
}
public static PGPKeyRing getPGPKeyRing(Context context, Uri queryUri) {
Map<Long, PGPKeyRing> result = getPGPKeyRings(context, queryUri);
if(result.isEmpty())
return null;
return result.values().iterator().next();
}
public static PGPPublicKeyRing getPGPPublicKeyRingWithKeyId(Context context, long keyId) {
Uri uri = KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(keyId));
long masterKeyId = getMasterKeyId(context, uri);
if(masterKeyId != 0)
return getPGPPublicKeyRing(context, masterKeyId);
return null;
}
public static PGPSecretKeyRing getPGPSecretKeyRingWithKeyId(Context context, long keyId) {
Uri uri = KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(Long.toString(keyId));
long masterKeyId = getMasterKeyId(context, uri);
if(masterKeyId != 0)
return getPGPSecretKeyRing(context, masterKeyId);
return null;
}
/**
* Retrieves the actual PGPPublicKeyRing object from the database blob based on the masterKeyId
*/
public static PGPPublicKeyRing getPGPPublicKeyRing(Context context,
long masterKeyId) {
Uri queryUri = KeyRingData.buildPublicKeyRingUri(Long.toString(masterKeyId));
return (PGPPublicKeyRing) getPGPKeyRing(context, queryUri);
}
/**
* Retrieves the actual PGPSecretKeyRing object from the database blob based on the maserKeyId
*/
public static PGPSecretKeyRing getPGPSecretKeyRing(Context context,
long masterKeyId) {
Uri queryUri = KeyRingData.buildSecretKeyRingUri(Long.toString(masterKeyId));
return (PGPSecretKeyRing) getPGPKeyRing(context, queryUri);
}
/**
* Saves PGPPublicKeyRing with its keys and userIds in DB
*/
@SuppressWarnings("unchecked")
public static void saveKeyRing(Context context, PGPPublicKeyRing keyRing) throws IOException {
PGPPublicKey masterKey = keyRing.getPublicKey();
long masterKeyId = masterKey.getKeyID();
// IF there is a secret key, preserve it!
PGPSecretKeyRing secretRing = ProviderHelper.getPGPSecretKeyRing(context, masterKeyId);
// delete old version of this keyRing, which also deletes all keys and userIds on cascade
try {
context.getContentResolver().delete(KeyRingData.buildPublicKeyRingUri(Long.toString(masterKeyId)), null, null);
} catch (UnsupportedOperationException e) {
Log.e(Constants.TAG, "Key could not be deleted! Maybe we are creating a new one!", e);
}
ContentValues values = new ContentValues();
// use exactly the same _ID again to replace key in-place.
// NOTE: If we would not use the same _ID again,
// getting back to the ViewKeyActivity would result in Nullpointer,
// because the currently loaded key would be gone from the database
values.put(KeyRingData.MASTER_KEY_ID, masterKeyId);
values.put(KeyRingData.KEY_RING_DATA, keyRing.getEncoded());
// insert new version of this keyRing
Uri uri = KeyRingData.buildPublicKeyRingUri(Long.toString(masterKeyId));
Uri insertedUri = context.getContentResolver().insert(uri, values);
// save all keys and userIds included in keyRing object in database
ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>();
int rank = 0;
for (PGPPublicKey key : new IterableIterator<PGPPublicKey>(keyRing.getPublicKeys())) {
operations.add(buildPublicKeyOperations(context, masterKeyId, key, rank));
++rank;
}
// get a list of owned secret keys, for verification filtering
Map<Long, PGPKeyRing> allKeyRings = getPGPKeyRings(context, KeyRingData.buildSecretKeyRingUri());
// special case: available secret keys verify themselves!
if(secretRing != null)
allKeyRings.put(secretRing.getSecretKey().getKeyID(), secretRing);
// classify and order user ids. primary are moved to the front, revoked to the back,
// otherwise the order in the keyfile is preserved.
List<UserIdItem> uids = new ArrayList<UserIdItem>();
for (String userId : new IterableIterator<String>(masterKey.getUserIDs())) {
UserIdItem item = new UserIdItem();
uids.add(item);
item.userId = userId;
// look through signatures for this specific key
for (PGPSignature cert : new IterableIterator<PGPSignature>(
masterKey.getSignaturesForID(userId))) {
long certId = cert.getKeyID();
try {
// self signature
if(certId == masterKeyId) {
cert.init(new JcaPGPContentVerifierBuilderProvider().setProvider(
Constants.BOUNCY_CASTLE_PROVIDER_NAME), masterKey);
if(!cert.verifyCertification(userId, masterKey)) {
// not verified?! dang! TODO notify user? this is kinda serious...
Log.e(Constants.TAG, "Could not verify self signature for " + userId + "!");
continue;
}
// is this the first, or a more recent certificate?
if(item.selfCert == null ||
item.selfCert.getCreationTime().before(cert.getCreationTime())) {
item.selfCert = cert;
item.isPrimary = cert.getHashedSubPackets().isPrimaryUserID();
item.isRevoked =
cert.getSignatureType() == PGPSignature.CERTIFICATION_REVOCATION;
}
}
// verify signatures from known private keys
if(allKeyRings.containsKey(certId)) {
// mark them as verified
cert.init(new JcaPGPContentVerifierBuilderProvider().setProvider(
Constants.BOUNCY_CASTLE_PROVIDER_NAME),
allKeyRings.get(certId).getPublicKey());
if(cert.verifyCertification(userId, masterKey)) {
item.trustedCerts.add(cert);
}
}
} catch(SignatureException e) {
Log.e(Constants.TAG, "Signature verification failed! "
+ PgpKeyHelper.convertKeyIdToHex(masterKey.getKeyID())
+ " from "
+ PgpKeyHelper.convertKeyIdToHex(cert.getKeyID()), e);
} catch(PGPException e) {
Log.e(Constants.TAG, "Signature verification failed! "
+ PgpKeyHelper.convertKeyIdToHex(masterKey.getKeyID())
+ " from "
+ PgpKeyHelper.convertKeyIdToHex(cert.getKeyID()), e);
}
}
}
// primary before regular before revoked (see UserIdItem.compareTo)
// this is a stable sort, so the order of keys is otherwise preserved.
Collections.sort(uids);
// iterate and put into db
for(int userIdRank = 0; userIdRank < uids.size(); userIdRank++) {
UserIdItem item = uids.get(userIdRank);
operations.add(buildUserIdOperations(masterKeyId, item, userIdRank));
// no self cert is bad, but allowed by the rfc...
if(item.selfCert != null) {
operations.add(buildCertOperations(
masterKeyId, userIdRank, item.selfCert, Certs.VERIFIED_SELF));
}
// don't bother with trusted certs if the uid is revoked, anyways
if(item.isRevoked) {
continue;
}
for(int i = 0; i < item.trustedCerts.size(); i++) {
operations.add(buildCertOperations(
masterKeyId, userIdRank, item.trustedCerts.get(i), Certs.VERIFIED_SECRET));
}
}
try {
context.getContentResolver().applyBatch(KeychainContract.CONTENT_AUTHORITY, operations);
} catch (RemoteException e) {
Log.e(Constants.TAG, "applyBatch failed!", e);
} catch (OperationApplicationException e) {
Log.e(Constants.TAG, "applyBatch failed!", e);
}
// Save the saved keyring (if any)
if(secretRing != null) {
saveKeyRing(context, secretRing);
}
}
private static class UserIdItem implements Comparable<UserIdItem> {
String userId;
boolean isPrimary = false;
boolean isRevoked = false;
PGPSignature selfCert;
List<PGPSignature> trustedCerts = new ArrayList<PGPSignature>();
@Override
public int compareTo(UserIdItem o) {
// if one key is primary but the other isn't, the primary one always comes first
if(isPrimary != o.isPrimary)
return isPrimary ? -1 : 1;
// revoked keys always come last!
if(isRevoked != o.isRevoked)
return isRevoked ? 1 : -1;
return 0;
}
}
/**
* Saves a PGPSecretKeyRing in the DB. This will only work if a corresponding public keyring
* is already in the database!
*/
@SuppressWarnings("unchecked")
public static void saveKeyRing(Context context, PGPSecretKeyRing keyRing) throws IOException {
long masterKeyId = keyRing.getPublicKey().getKeyID();
// save secret keyring
ContentValues values = new ContentValues();
values.put(KeyRingData.MASTER_KEY_ID, masterKeyId);
values.put(KeyRingData.KEY_RING_DATA, keyRing.getEncoded());
// insert new version of this keyRing
Uri uri = KeyRingData.buildSecretKeyRingUri(Long.toString(masterKeyId));
context.getContentResolver().insert(uri, values);
}
/**
* Saves (or updates) a pair of public and secret KeyRings in the database
*/
@SuppressWarnings("unchecked")
public static void saveKeyRing(Context context, PGPPublicKeyRing pubRing, PGPSecretKeyRing privRing) throws IOException {
long masterKeyId = pubRing.getPublicKey().getKeyID();
// delete secret keyring (so it isn't unnecessarily saved by public-saveKeyRing below)
context.getContentResolver().delete(KeyRingData.buildSecretKeyRingUri(Long.toString(masterKeyId)), null, null);
// save public keyring
saveKeyRing(context, pubRing);
saveKeyRing(context, privRing);
}
/**
* Build ContentProviderOperation to add PGPPublicKey to database corresponding to a keyRing
*/
private static ContentProviderOperation buildPublicKeyOperations(Context context,
long masterKeyId, PGPPublicKey key, int rank) throws IOException {
ContentValues values = new ContentValues();
values.put(Keys.MASTER_KEY_ID, masterKeyId);
values.put(Keys.RANK, rank);
values.put(Keys.KEY_ID, key.getKeyID());
values.put(Keys.KEY_SIZE, key.getBitStrength());
values.put(Keys.ALGORITHM, key.getAlgorithm());
values.put(Keys.FINGERPRINT, key.getFingerprint());
values.put(Keys.CAN_CERTIFY, (PgpKeyHelper.isCertificationKey(key)));
values.put(Keys.CAN_SIGN, (PgpKeyHelper.isSigningKey(key)));
values.put(Keys.CAN_ENCRYPT, PgpKeyHelper.isEncryptionKey(key));
values.put(Keys.IS_REVOKED, key.isRevoked());
values.put(Keys.CREATION, PgpKeyHelper.getCreationDate(key).getTime() / 1000);
Date expiryDate = PgpKeyHelper.getExpiryDate(key);
if (expiryDate != null) {
values.put(Keys.EXPIRY, expiryDate.getTime() / 1000);
}
Uri uri = Keys.buildKeysUri(Long.toString(masterKeyId));
return ContentProviderOperation.newInsert(uri).withValues(values).build();
}
/**
* Build ContentProviderOperation to add PGPPublicKey to database corresponding to a keyRing
*/
private static ContentProviderOperation buildCertOperations(long masterKeyId,
int rank,
PGPSignature cert,
int verified)
throws IOException {
ContentValues values = new ContentValues();
values.put(Certs.MASTER_KEY_ID, masterKeyId);
values.put(Certs.RANK, rank);
values.put(Certs.KEY_ID_CERTIFIER, cert.getKeyID());
values.put(Certs.TYPE, cert.getSignatureType());
values.put(Certs.CREATION, cert.getCreationTime().getTime() / 1000);
values.put(Certs.VERIFIED, verified);
values.put(Certs.DATA, cert.getEncoded());
Uri uri = Certs.buildCertsUri(Long.toString(masterKeyId));
return ContentProviderOperation.newInsert(uri).withValues(values).build();
}
/**
* Build ContentProviderOperation to add PublicUserIds to database corresponding to a keyRing
*/
private static ContentProviderOperation buildUserIdOperations(long masterKeyId, UserIdItem item,
int rank) {
ContentValues values = new ContentValues();
values.put(UserIds.MASTER_KEY_ID, masterKeyId);
values.put(UserIds.USER_ID, item.userId);
values.put(UserIds.IS_PRIMARY, item.isPrimary);
values.put(UserIds.IS_REVOKED, item.isRevoked);
values.put(UserIds.RANK, rank);
Uri uri = UserIds.buildUserIdsUri(Long.toString(masterKeyId));
return ContentProviderOperation.newInsert(uri).withValues(values).build();
}
public static ArrayList<String> getKeyRingsAsArmoredString(Context context, long[] masterKeyIds) {
ArrayList<String> output = new ArrayList<String>();
if (masterKeyIds != null && masterKeyIds.length > 0) {
Cursor cursor = getCursorWithSelectedKeyringMasterKeyIds(context, masterKeyIds);
if (cursor != null) {
int masterIdCol = cursor.getColumnIndex(KeyRingData.MASTER_KEY_ID);
int dataCol = cursor.getColumnIndex(KeyRingData.KEY_RING_DATA);
if (cursor.moveToFirst()) {
do {
Log.d(Constants.TAG, "masterKeyId: " + cursor.getLong(masterIdCol));
// get actual keyring data blob and write it to ByteArrayOutputStream
try {
Object keyRing = null;
byte[] data = cursor.getBlob(dataCol);
if (data != null) {
keyRing = PgpConversionHelper.BytesToPGPKeyRing(data);
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ArmoredOutputStream aos = new ArmoredOutputStream(bos);
aos.setHeader("Version", PgpHelper.getFullVersion(context));
if (keyRing instanceof PGPSecretKeyRing) {
aos.write(((PGPSecretKeyRing) keyRing).getEncoded());
} else if (keyRing instanceof PGPPublicKeyRing) {
aos.write(((PGPPublicKeyRing) keyRing).getEncoded());
}
aos.close();
String armoredKey = bos.toString("UTF-8");
Log.d(Constants.TAG, "armoredKey:" + armoredKey);
output.add(armoredKey);
} catch (IOException e) {
Log.e(Constants.TAG, "IOException", e);
}
} while (cursor.moveToNext());
}
}
if (cursor != null) {
cursor.close();
}
} else {
Log.e(Constants.TAG, "No master keys given!");
}
if (output.size() > 0) {
return output;
} else {
return null;
}
}
private static Cursor getCursorWithSelectedKeyringMasterKeyIds(Context context, long[] masterKeyIds) {
Cursor cursor = null;
if (masterKeyIds != null && masterKeyIds.length > 0) {
String inMasterKeyList = KeyRingData.MASTER_KEY_ID + " IN (";
for (int i = 0; i < masterKeyIds.length; ++i) {
if (i != 0) {
inMasterKeyList += ", ";
}
inMasterKeyList += DatabaseUtils.sqlEscapeString("" + masterKeyIds[i]);
}
inMasterKeyList += ")";
cursor = context.getContentResolver().query(KeyRingData.buildPublicKeyRingUri(), new String[] {
KeyRingData._ID, KeyRingData.MASTER_KEY_ID, KeyRingData.KEY_RING_DATA
}, inMasterKeyList, null, null);
}
return cursor;
}
public static ArrayList<String> getRegisteredApiApps(Context context) {
Cursor cursor = context.getContentResolver().query(ApiApps.CONTENT_URI, null, null, null,
null);
ArrayList<String> packageNames = new ArrayList<String>();
if (cursor != null) {
int packageNameCol = cursor.getColumnIndex(ApiApps.PACKAGE_NAME);
if (cursor.moveToFirst()) {
do {
packageNames.add(cursor.getString(packageNameCol));
} while (cursor.moveToNext());
}
}
if (cursor != null) {
cursor.close();
}
return packageNames;
}
private static ContentValues contentValueForApiApps(AppSettings appSettings) {
ContentValues values = new ContentValues();
values.put(ApiApps.PACKAGE_NAME, appSettings.getPackageName());
values.put(ApiApps.PACKAGE_SIGNATURE, appSettings.getPackageSignature());
return values;
}
private static ContentValues contentValueForApiAccounts(AccountSettings accSettings) {
ContentValues values = new ContentValues();
values.put(KeychainContract.ApiAccounts.ACCOUNT_NAME, accSettings.getAccountName());
values.put(KeychainContract.ApiAccounts.KEY_ID, accSettings.getKeyId());
values.put(KeychainContract.ApiAccounts.COMPRESSION, accSettings.getCompression());
values.put(KeychainContract.ApiAccounts.ENCRYPTION_ALGORITHM, accSettings.getEncryptionAlgorithm());
values.put(KeychainContract.ApiAccounts.HASH_ALORITHM, accSettings.getHashAlgorithm());
return values;
}
public static void insertApiApp(Context context, AppSettings appSettings) {
context.getContentResolver().insert(KeychainContract.ApiApps.CONTENT_URI,
contentValueForApiApps(appSettings));
}
public static void insertApiAccount(Context context, Uri uri, AccountSettings accSettings) {
context.getContentResolver().insert(uri, contentValueForApiAccounts(accSettings));
}
public static void updateApiApp(Context context, AppSettings appSettings, Uri uri) {
if (context.getContentResolver().update(uri, contentValueForApiApps(appSettings), null,
null) <= 0) {
throw new RuntimeException();
}
}
public static void updateApiAccount(Context context, AccountSettings accSettings, Uri uri) {
if (context.getContentResolver().update(uri, contentValueForApiAccounts(accSettings), null,
null) <= 0) {
throw new RuntimeException();
}
}
/**
* Must be an uri pointing to an account
*
* @param context
* @param uri
* @return
*/
public static AppSettings getApiAppSettings(Context context, Uri uri) {
AppSettings settings = null;
Cursor cur = context.getContentResolver().query(uri, null, null, null, null);
if (cur != null && cur.moveToFirst()) {
settings = new AppSettings();
settings.setPackageName(cur.getString(
cur.getColumnIndex(KeychainContract.ApiApps.PACKAGE_NAME)));
settings.setPackageSignature(cur.getBlob(
cur.getColumnIndex(KeychainContract.ApiApps.PACKAGE_SIGNATURE)));
}
return settings;
}
public static AccountSettings getApiAccountSettings(Context context, Uri accountUri) {
AccountSettings settings = null;
Cursor cur = context.getContentResolver().query(accountUri, null, null, null, null);
if (cur != null && cur.moveToFirst()) {
settings = new AccountSettings();
settings.setAccountName(cur.getString(
cur.getColumnIndex(KeychainContract.ApiAccounts.ACCOUNT_NAME)));
settings.setKeyId(cur.getLong(
cur.getColumnIndex(KeychainContract.ApiAccounts.KEY_ID)));
settings.setCompression(cur.getInt(
cur.getColumnIndexOrThrow(KeychainContract.ApiAccounts.COMPRESSION)));
settings.setHashAlgorithm(cur.getInt(
cur.getColumnIndexOrThrow(KeychainContract.ApiAccounts.HASH_ALORITHM)));
settings.setEncryptionAlgorithm(cur.getInt(
cur.getColumnIndexOrThrow(KeychainContract.ApiAccounts.ENCRYPTION_ALGORITHM)));
}
return settings;
}
public static Set<Long> getAllKeyIdsForApp(Context context, Uri uri) {
Set<Long> keyIds = new HashSet<Long>();
Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
int keyIdColumn = cursor.getColumnIndex(KeychainContract.ApiAccounts.KEY_ID);
while (cursor.moveToNext()) {
keyIds.add(cursor.getLong(keyIdColumn));
}
}
return keyIds;
}
public static byte[] getApiAppSignature(Context context, String packageName) {
Uri queryUri = ApiApps.buildByPackageNameUri(packageName);
String[] projection = new String[]{ApiApps.PACKAGE_SIGNATURE};
ContentResolver cr = context.getContentResolver();
Cursor cursor = cr.query(queryUri, projection, null, null, null);
byte[] signature = null;
if (cursor != null && cursor.moveToFirst()) {
int signatureCol = 0;
signature = cursor.getBlob(signatureCol);
}
if (cursor != null) {
cursor.close();
}
return signature;
}
}