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/*
ConnectBot: simple, powerful, open-source SSH client for Android
Copyright (C) 2007-2008 Kenny Root, Jeffrey Sharkey
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.connectbot.util;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.util.LinkedList;
import java.util.List;
import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import org.connectbot.service.PromptHelper;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
/**
* Public Key Encryption database. Contains private and public key pairs
* for public key authentication.
*
* @author kroot
*/
public class PubkeyDatabase extends SQLiteOpenHelper {
public final static String TAG = PubkeyDatabase.class.toString();
public final static String DB_NAME = "pubkeys";
public final static int DB_VERSION = 1;
public final static String TABLE_PUBKEYS = "pubkeys";
public final static String FIELD_PUBKEY_NICKNAME = "nickname";
public final static String FIELD_PUBKEY_TYPE = "type";
public final static String FIELD_PUBKEY_PRIVATE = "private";
public final static String FIELD_PUBKEY_PUBLIC = "public";
public final static String FIELD_PUBKEY_ENCRYPTED = "encrypted";
public final static String FIELD_PUBKEY_STARTUP = "startup";
public final static String KEY_TYPE_RSA = "RSA",
KEY_TYPE_DSA = "DSA",
KEY_TYPE_IMPORTED = "IMPORTED";
private Context context;
public PubkeyDatabase(Context context) {
super(context, DB_NAME, null, DB_VERSION);
this.context = context;
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE " + TABLE_PUBKEYS
+ " (_id INTEGER PRIMARY KEY, "
+ FIELD_PUBKEY_NICKNAME + " TEXT, "
+ FIELD_PUBKEY_TYPE + " TEXT, "
+ FIELD_PUBKEY_PRIVATE + " BLOB, "
+ FIELD_PUBKEY_PUBLIC + " BLOB, "
+ FIELD_PUBKEY_ENCRYPTED + " INTEGER, "
+ FIELD_PUBKEY_STARTUP + " INTEGER)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
/**
* Create a new pubkey using the given parameters, and return its new
* <code>_id</code> value.
*/
public long createPubkey(SQLiteDatabase db, String nickname, String type, byte[] privatekey,
byte[] publickey, boolean encrypted, boolean startup) {
// create and insert new host
if (db == null)
db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(FIELD_PUBKEY_NICKNAME, nickname);
values.put(FIELD_PUBKEY_TYPE, type);
values.put(FIELD_PUBKEY_PRIVATE, privatekey);
values.put(FIELD_PUBKEY_PUBLIC, publickey);
values.put(FIELD_PUBKEY_ENCRYPTED, encrypted ? 1 : 0);
values.put(FIELD_PUBKEY_STARTUP, startup ? 1 : 0);
return db.insert(TABLE_PUBKEYS, null, values);
}
/**
* Delete a specific host by its <code>_id</code> value.
*/
public void deletePubkey(long id) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_PUBKEYS, "_id = ?", new String[] { Long.toString(id) });
HostDatabase hostdb = new HostDatabase(context);
hostdb.stopUsingPubkey(id);
hostdb.close();
}
/**
* Return a cursor that contains information about all known hosts.
*/
public Cursor allPubkeys() {
SQLiteDatabase db = this.getReadableDatabase();
return db.query(TABLE_PUBKEYS, new String[] { "_id",
FIELD_PUBKEY_NICKNAME, FIELD_PUBKEY_TYPE, FIELD_PUBKEY_PRIVATE,
FIELD_PUBKEY_PUBLIC, FIELD_PUBKEY_ENCRYPTED, FIELD_PUBKEY_STARTUP },
null, null, null, null, null);
}
public Cursor getPubkey(long id) {
SQLiteDatabase db = this.getReadableDatabase();
return db.query(TABLE_PUBKEYS, new String[] { "_id",
FIELD_PUBKEY_NICKNAME, FIELD_PUBKEY_TYPE, FIELD_PUBKEY_PRIVATE,
FIELD_PUBKEY_PUBLIC, FIELD_PUBKEY_ENCRYPTED, FIELD_PUBKEY_STARTUP },
"_id = ?", new String[] { String.valueOf(id) },
null, null, null);
}
public Cursor getAllStartPubkeys() {
SQLiteDatabase db = this.getReadableDatabase();
return db.query(TABLE_PUBKEYS, new String[] { "_id",
FIELD_PUBKEY_NICKNAME, FIELD_PUBKEY_TYPE, FIELD_PUBKEY_PRIVATE,
FIELD_PUBKEY_PUBLIC, FIELD_PUBKEY_ENCRYPTED, FIELD_PUBKEY_STARTUP },
FIELD_PUBKEY_STARTUP + " = 1", null, null, null, null);
}
/**
* Pull all values for a given column as a list of Strings, probably for use
* in a ListPreference. Sorted by <code>_id</code> ascending.
*/
public List<CharSequence> allValues(String column) {
List<CharSequence> list = new LinkedList<CharSequence>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.query(TABLE_PUBKEYS, new String[] { "_id", column },
null, null, null, null, "_id ASC");
int COL = c.getColumnIndexOrThrow(column);
while(c.moveToNext()) {
list.add(c.getString(COL));
}
c.close();
return list;
}
public String getNickname(long id) {
String nickname = null;
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.query(TABLE_PUBKEYS, new String[] { "_id",
FIELD_PUBKEY_NICKNAME }, "_id = ?",
new String[] { Long.toString(id) }, null, null, null);
if (c != null && c.moveToFirst())
nickname = c.getString(c.getColumnIndexOrThrow(FIELD_PUBKEY_NICKNAME));
c.close();
return nickname;
}
public void setOnStart(long id, boolean onStart) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(FIELD_PUBKEY_STARTUP, onStart ? 1 : 0);
db.update(TABLE_PUBKEYS, values, "_id = ?", new String[] { Long.toString(id) });
}
public boolean changePassword(long id, String oldPassword, String newPassword) throws NoSuchAlgorithmException, NoSuchPaddingException, IllegalBlockSizeException, InvalidKeyException, BadPaddingException {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_PUBKEYS, new String[] { FIELD_PUBKEY_TYPE,
FIELD_PUBKEY_PRIVATE, FIELD_PUBKEY_ENCRYPTED },
"_id = ?", new String[] { String.valueOf(id) },
null, null, null);
if (!c.moveToFirst())
return false;
String keyType = c.getString(0);
byte[] encPriv = c.getBlob(1);
c.close();
PrivateKey priv;
try {
priv = PubkeyUtils.decodePrivate(encPriv, keyType, oldPassword);
} catch (InvalidKeyException e) {
return false;
} catch (BadPaddingException e) {
return false;
} catch (InvalidKeySpecException e) {
return false;
}
ContentValues values = new ContentValues();
values.put(FIELD_PUBKEY_PRIVATE, PubkeyUtils.getEncodedPrivate(priv, newPassword));
values.put(FIELD_PUBKEY_ENCRYPTED, newPassword.length() > 0 ? 1 : 0);
db.update(TABLE_PUBKEYS, values, "_id = ?", new String[] { String.valueOf(id) });
return true;
}
}
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