com.google.gerrit.server.account.PutHttpPassword.java Source code

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Here is the source code for com.google.gerrit.server.account.PutHttpPassword.java

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// Copyright (C) 2013 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 static com.google.gerrit.server.account.externalids.ExternalId.SCHEME_USERNAME;

import com.google.common.base.Strings;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.PutHttpPassword.Input;
import com.google.gerrit.server.account.externalids.ExternalId;
import com.google.gerrit.server.account.externalids.ExternalIds;
import com.google.gerrit.server.account.externalids.ExternalIdsUpdate;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import org.apache.commons.codec.binary.Base64;
import org.eclipse.jgit.errors.ConfigInvalidException;

public class PutHttpPassword implements RestModifyView<AccountResource, Input> {
    public static class Input {
        public String httpPassword;
        public boolean generate;
    }

    private static final int LEN = 31;
    private static final SecureRandom rng;

    static {
        try {
            rng = SecureRandom.getInstance("SHA1PRNG");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("Cannot create RNG for password generator", e);
        }
    }

    private final Provider<CurrentUser> self;
    private final Provider<ReviewDb> dbProvider;
    private final AccountCache accountCache;
    private final ExternalIds externalIds;
    private final ExternalIdsUpdate.User externalIdsUpdate;

    @Inject
    PutHttpPassword(Provider<CurrentUser> self, Provider<ReviewDb> dbProvider, AccountCache accountCache,
            ExternalIds externalIds, ExternalIdsUpdate.User externalIdsUpdate) {
        this.self = self;
        this.dbProvider = dbProvider;
        this.accountCache = accountCache;
        this.externalIds = externalIds;
        this.externalIdsUpdate = externalIdsUpdate;
    }

    @Override
    public Response<String> apply(AccountResource rsrc, Input input)
            throws AuthException, ResourceNotFoundException, ResourceConflictException, OrmException, IOException,
            ConfigInvalidException {
        if (input == null) {
            input = new Input();
        }
        input.httpPassword = Strings.emptyToNull(input.httpPassword);

        String newPassword;
        if (input.generate) {
            if (self.get() != rsrc.getUser() && !self.get().getCapabilities().canAdministrateServer()) {
                throw new AuthException("not allowed to generate HTTP password");
            }
            newPassword = generate();

        } else if (input.httpPassword == null) {
            if (self.get() != rsrc.getUser() && !self.get().getCapabilities().canAdministrateServer()) {
                throw new AuthException("not allowed to clear HTTP password");
            }
            newPassword = null;
        } else {
            if (!self.get().getCapabilities().canAdministrateServer()) {
                throw new AuthException("not allowed to set HTTP password directly, "
                        + "requires the Administrate Server permission");
            }
            newPassword = input.httpPassword;
        }
        return apply(rsrc.getUser(), newPassword);
    }

    public Response<String> apply(IdentifiedUser user, String newPassword) throws ResourceNotFoundException,
            ResourceConflictException, OrmException, IOException, ConfigInvalidException {
        if (user.getUserName() == null) {
            throw new ResourceConflictException("username must be set");
        }

        ExternalId extId = externalIds.get(dbProvider.get(),
                ExternalId.Key.create(SCHEME_USERNAME, user.getUserName()));
        if (extId == null) {
            throw new ResourceNotFoundException();
        }
        ExternalId newExtId = ExternalId.createWithPassword(extId.key(), extId.accountId(), extId.email(),
                newPassword);
        externalIdsUpdate.create().upsert(dbProvider.get(), newExtId);
        accountCache.evict(user.getAccountId());

        return Strings.isNullOrEmpty(newPassword) ? Response.<String>none() : Response.ok(newPassword);
    }

    public static String generate() {
        byte[] rand = new byte[LEN];
        rng.nextBytes(rand);

        byte[] enc = Base64.encodeBase64(rand, false);
        StringBuilder r = new StringBuilder(enc.length);
        for (int i = 0; i < enc.length; i++) {
            if (enc[i] == '=') {
                break;
            }
            r.append((char) enc[i]);
        }
        return r.toString();
    }
}