/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit;
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import java.text.MessageFormat;
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import com.gitblit.Constants.AccessRestrictionType;
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import com.gitblit.Constants.AuthorizationControl;
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import com.gitblit.models.RepositoryModel;
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import com.gitblit.models.UserModel;
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import com.gitblit.utils.StringUtils;
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/**
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* The GitFilter is an AccessRestrictionFilter which ensures that Git client
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* requests for push, clone, or view restricted repositories are authenticated
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* and authorized.
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*
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* @author James Moger
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*
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*/
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public class GitFilter extends AccessRestrictionFilter {
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protected static final String gitReceivePack = "/git-receive-pack";
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protected static final String gitUploadPack = "/git-upload-pack";
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protected static final String[] suffixes = { gitReceivePack, gitUploadPack, "/info/refs", "/HEAD",
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"/objects" };
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/**
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* Extract the repository name from the url.
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*
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* @param url
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* @return repository name
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*/
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public static String getRepositoryName(String value) {
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String repository = value;
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// get the repository name from the url by finding a known url suffix
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for (String urlSuffix : suffixes) {
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if (repository.indexOf(urlSuffix) > -1) {
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repository = repository.substring(0, repository.indexOf(urlSuffix));
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}
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}
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return repository;
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}
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/**
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* Extract the repository name from the url.
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*
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* @param url
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* @return repository name
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*/
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@Override
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protected String extractRepositoryName(String url) {
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return GitFilter.getRepositoryName(url);
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}
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/**
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* Analyze the url and returns the action of the request. Return values are
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* either "/git-receive-pack" or "/git-upload-pack".
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*
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* @param serverUrl
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* @return action of the request
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*/
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@Override
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protected String getUrlRequestAction(String suffix) {
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if (!StringUtils.isEmpty(suffix)) {
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if (suffix.startsWith(gitReceivePack)) {
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return gitReceivePack;
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} else if (suffix.startsWith(gitUploadPack)) {
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return gitUploadPack;
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} else if (suffix.contains("?service=git-receive-pack")) {
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return gitReceivePack;
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} else if (suffix.contains("?service=git-upload-pack")) {
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return gitUploadPack;
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} else {
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return gitUploadPack;
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}
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}
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return null;
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}
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/**
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* Determine if a non-existing repository can be created using this filter.
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*
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* @return true if the server allows repository creation on-push
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*/
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@Override
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protected boolean isCreationAllowed() {
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return GitBlit.getBoolean(Keys.git.allowCreateOnPush, true);
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}
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/**
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* Determine if the repository can receive pushes.
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*
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* @param repository
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* @param action
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* @return true if the action may be performed
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*/
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@Override
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protected boolean isActionAllowed(RepositoryModel repository, String action) {
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if (!StringUtils.isEmpty(action)) {
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if (action.equals(gitReceivePack)) {
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// Push request
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if (!repository.isBare) {
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logger.warn("Gitblit does not allow pushes to repositories with a working copy");
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return false;
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}
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}
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}
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return true;
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}
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/**
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* Determine if the repository requires authentication.
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*
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* @param repository
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* @param action
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* @return true if authentication required
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*/
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@Override
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protected boolean requiresAuthentication(RepositoryModel repository, String action) {
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if (gitUploadPack.equals(action)) {
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// send to client
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return repository.accessRestriction.atLeast(AccessRestrictionType.CLONE);
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} else if (gitReceivePack.equals(action)) {
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// receive from client
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return repository.accessRestriction.atLeast(AccessRestrictionType.PUSH);
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}
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return false;
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}
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/**
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* Determine if the user can access the repository and perform the specified
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* action.
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*
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* @param repository
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* @param user
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* @param action
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* @return true if user may execute the action on the repository
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*/
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@Override
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protected boolean canAccess(RepositoryModel repository, UserModel user, String action) {
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if (!GitBlit.getBoolean(Keys.git.enableGitServlet, true)) {
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// Git Servlet disabled
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return false;
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}
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if (action.equals(gitReceivePack)) {
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// Push request
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if (user.canPush(repository)) {
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return true;
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} else {
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// user is unauthorized to push to this repository
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logger.warn(MessageFormat.format("user {0} is not authorized to push to {1}",
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user.username, repository));
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return false;
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}
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} else if (action.equals(gitUploadPack)) {
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// Clone request
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if (user.canClone(repository)) {
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return true;
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} else {
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// user is unauthorized to clone this repository
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logger.warn(MessageFormat.format("user {0} is not authorized to clone {1}",
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user.username, repository));
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return false;
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}
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}
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return true;
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}
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/**
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* An authenticated user with the CREATE role can create a repository on
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* push.
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*
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* @param user
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* @param repository
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* @param action
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* @return the repository model, if it is created, null otherwise
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*/
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@Override
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protected RepositoryModel createRepository(UserModel user, String repository, String action) {
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boolean isPush = !StringUtils.isEmpty(action) && gitReceivePack.equals(action);
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if (isPush) {
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if (user.canCreate(repository)) {
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// user is pushing to a new repository
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// validate name
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if (repository.startsWith("../")) {
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logger.error(MessageFormat.format("Illegal relative path in repository name! {0}", repository));
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return null;
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}
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if (repository.contains("/../")) {
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logger.error(MessageFormat.format("Illegal relative path in repository name! {0}", repository));
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return null;
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}
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// confirm valid characters in repository name
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Character c = StringUtils.findInvalidCharacter(repository);
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if (c != null) {
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logger.error(MessageFormat.format("Invalid character '{0}' in repository name {1}!", c, repository));
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return null;
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}
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// create repository
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RepositoryModel model = new RepositoryModel();
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model.name = repository;
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model.owner = user.username;
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model.projectPath = StringUtils.getFirstPathElement(repository);
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if (model.isUsersPersonalRepository(user.username)) {
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// personal repository, default to private for user
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model.authorizationControl = AuthorizationControl.NAMED;
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model.accessRestriction = AccessRestrictionType.VIEW;
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} else {
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// common repository, user default server settings
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model.authorizationControl = AuthorizationControl.fromName(GitBlit.getString(Keys.git.defaultAuthorizationControl, ""));
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model.accessRestriction = AccessRestrictionType.fromName(GitBlit.getString(Keys.git.defaultAccessRestriction, ""));
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}
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// create the repository
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try {
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GitBlit.self().updateRepositoryModel(model.name, model, true);
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logger.info(MessageFormat.format("{0} created {1} ON-PUSH", user.username, model.name));
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return GitBlit.self().getRepositoryModel(model.name);
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} catch (GitBlitException e) {
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logger.error(MessageFormat.format("{0} failed to create repository {1} ON-PUSH!", user.username, model.name), e);
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}
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} else {
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logger.warn(MessageFormat.format("{0} is not permitted to create repository {1} ON-PUSH!", user.username, repository));
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}
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}
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// repository could not be created or action was not a push
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return null;
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}
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}
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