| // Copyright (C) 2010 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.server.account; |
| |
| import com.google.gerrit.common.errors.NoSuchEntityException; |
| import com.google.gerrit.reviewdb.client.AccountExternalId; |
| import com.google.gerrit.reviewdb.server.ReviewDb; |
| import com.google.gerrit.server.IdentifiedUser; |
| import com.google.gwtorm.server.OrmException; |
| import com.google.inject.Inject; |
| import com.google.inject.assistedinject.Assisted; |
| |
| import org.apache.commons.codec.binary.Base64; |
| |
| import java.security.NoSuchAlgorithmException; |
| import java.security.SecureRandom; |
| import java.util.Collections; |
| import java.util.concurrent.Callable; |
| |
| /** Operation to generate a password for an account. */ |
| public class GeneratePassword implements Callable<AccountExternalId> { |
| private static final int LEN = 12; |
| private static final SecureRandom rng; |
| |
| static { |
| try { |
| rng = SecureRandom.getInstance("SHA1PRNG"); |
| } catch (NoSuchAlgorithmException e) { |
| throw new RuntimeException("Cannot create RNG for password generator", e); |
| } |
| } |
| |
| public interface Factory { |
| GeneratePassword create(AccountExternalId.Key forUser); |
| } |
| |
| private final AccountCache accountCache; |
| private final ReviewDb db; |
| private final IdentifiedUser user; |
| |
| private final AccountExternalId.Key forUser; |
| |
| @Inject |
| GeneratePassword(final AccountCache accountCache, final ReviewDb db, |
| final IdentifiedUser user, |
| |
| @Assisted AccountExternalId.Key forUser) { |
| this.accountCache = accountCache; |
| this.db = db; |
| this.user = user; |
| |
| this.forUser = forUser; |
| } |
| |
| public AccountExternalId call() throws OrmException, NoSuchEntityException { |
| AccountExternalId id = db.accountExternalIds().get(forUser); |
| if (id == null || !user.getAccountId().equals(id.getAccountId())) { |
| throw new NoSuchEntityException(); |
| } |
| |
| id.setPassword(generate()); |
| db.accountExternalIds().update(Collections.singleton(id)); |
| accountCache.evict(user.getAccountId()); |
| return id; |
| } |
| |
| private String generate() { |
| byte[] rand = new byte[LEN]; |
| rng.nextBytes(rand); |
| |
| byte[] enc = Base64.encodeBase64(rand, false); |
| StringBuilder r = new StringBuilder(LEN); |
| for (int i = 0; i < LEN; i++) { |
| if (enc[i] == '=') { |
| break; |
| } |
| r.append((char) enc[i]); |
| } |
| return r.toString(); |
| } |
| } |