// GenerateToken generates a JWT token for the user session
// that can be appended to the #access_token segment to
// facilitate client-based OAuth2.
func GenerateToken(c context.Context, r *http.Request, user *model.User) (string, error) {
token := jwt.New(jwt.GetSigningMethod("HS256"))
token.Claims["user_id"] = user.ID
token.Claims["audience"] = httputil.GetURL(r)
token.Claims["expires"] = time.Now().UTC().Add(time.Hour * 72).Unix()
return token.SignedString([]byte(*secret))
}
// Authorize handles GitHub API Authorization.
func (r *GitHub) Authorize(res http.ResponseWriter, req *http.Request) (*model.Login, error) {
var config = &oauth.Config{
ClientId: r.Client,
ClientSecret: r.Secret,
Scope: DefaultScope,
AuthURL: fmt.Sprintf("%s/login/oauth/authorize", r.URL),
TokenURL: fmt.Sprintf("%s/login/oauth/access_token", r.URL),
RedirectURL: fmt.Sprintf("%s/api/auth/%s", httputil.GetURL(req), r.GetKind()),
}
// get the OAuth code
var code = req.FormValue("code")
var state = req.FormValue("state")
if len(code) == 0 {
var random = GetRandom()
httputil.SetCookie(res, req, "github_state", random)
http.Redirect(res, req, config.AuthCodeURL(random), http.StatusSeeOther)
return nil, nil
}
cookieState := httputil.GetCookie(req, "github_state")
httputil.DelCookie(res, req, "github_state")
if cookieState != state {
return nil, fmt.Errorf("Error matching state in OAuth2 redirect")
}
var trans = &oauth.Transport{Config: config}
var token, err = trans.Exchange(code)
if err != nil {
return nil, fmt.Errorf("Error exchanging token. %s", err)
}
var client = NewClient(r.API, token.AccessToken, r.SkipVerify)
var useremail, errr = GetUserEmail(client)
if errr != nil {
return nil, fmt.Errorf("Error retrieving user or verified email. %s", errr)
}
if len(r.Orgs) > 0 {
allowedOrg, err := UserBelongsToOrg(client, r.Orgs)
if err != nil {
return nil, fmt.Errorf("Could not check org membership. %s", err)
}
if !allowedOrg {
return nil, fmt.Errorf("User does not belong to correct org. Must belong to %v", r.Orgs)
}
}
var login = new(model.Login)
login.ID = int64(*useremail.ID)
login.Access = token.AccessToken
login.Login = *useremail.Login
login.Email = *useremail.Email
if useremail.Name != nil {
login.Name = *useremail.Name
}
return login, nil
}
// PostHook accepts a post-commit hook and parses the payload
// in order to trigger a build. The payload is specified to the
// remote system (ie GitHub) and will therefore get parsed by
// the appropriate remote plugin.
//
// POST /api/repos/{host}/{owner}/{name}/branches/{branch}/commits/{commit}
//
func PostCommit(c web.C, w http.ResponseWriter, r *http.Request) {
var ctx = context.FromC(c)
var (
branch = c.URLParams["branch"]
hash = c.URLParams["commit"]
host = c.URLParams["host"]
repo = ToRepo(c)
remote = remote.Lookup(host)
)
commit, err := datastore.GetCommitSha(ctx, repo, branch, hash)
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
if commit.Status == model.StatusStarted ||
commit.Status == model.StatusEnqueue {
w.WriteHeader(http.StatusConflict)
return
}
commit.Status = model.StatusEnqueue
commit.Started = 0
commit.Finished = 0
commit.Duration = 0
if err := datastore.PutCommit(ctx, commit); err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
owner, err := datastore.GetUser(ctx, repo.UserID)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
// Request a new token and update
user_token, err := remote.GetToken(owner)
if user_token != nil {
owner.Access = user_token.AccessToken
owner.Secret = user_token.RefreshToken
owner.TokenExpiry = user_token.Expiry
datastore.PutUser(ctx, owner)
} else if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
// drop the items on the queue
go worker.Do(ctx, &worker.Work{
User: owner,
Repo: repo,
Commit: commit,
Host: httputil.GetURL(r),
})
w.WriteHeader(http.StatusOK)
}
// Authorize handles authentication with thrid party remote systems,
// such as github or bitbucket, and returns user data.
func (r *Gitlab) Authorize(res http.ResponseWriter, req *http.Request) (*model.Login, error) {
host := httputil.GetURL(req)
config := NewOauthConfig(r, host)
var code = req.FormValue("code")
var state = req.FormValue("state")
if len(code) == 0 {
var random = GetRandom()
httputil.SetCookie(res, req, "gitlab_state", random)
http.Redirect(res, req, config.AuthCodeURL(random), http.StatusSeeOther)
return nil, nil
}
cookieState := httputil.GetCookie(req, "gitlab_state")
httputil.DelCookie(res, req, "gitlab_state")
if cookieState != state {
return nil, fmt.Errorf("Error matching state in OAuth2 redirect")
}
var trans = &oauth.Transport{
Config: config,
Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
TLSClientConfig: &tls.Config{InsecureSkipVerify: r.SkipVerify},
},
}
var token, err = trans.Exchange(code)
if err != nil {
return nil, fmt.Errorf("Error exchanging token. %s", err)
}
var client = NewClient(r.url, token.AccessToken, r.SkipVerify)
var user, errr = client.CurrentUser()
if errr != nil {
return nil, fmt.Errorf("Error retrieving current user. %s", errr)
}
var login = new(model.Login)
login.ID = int64(user.Id)
login.Access = token.AccessToken
login.Secret = token.RefreshToken
login.Login = user.Username
login.Email = user.Email
return login, nil
}
// DelRepo accepts a request to delete the named
// repository.
//
// DEL /api/repos/:host/:owner/:name
//
func DelRepo(c web.C, w http.ResponseWriter, r *http.Request) {
var ctx = context.FromC(c)
var repo = ToRepo(c)
// completely remove the repository from the database
var user = ToUser(c)
var remote = remote.Lookup(repo.Host)
if remote == nil {
log.Printf("[ERROR] no remote for host '%s' found", repo.Host)
} else {
// Request a new token and update
user_token, err := remote.GetToken(user)
if err != nil {
log.Printf("[ERROR] no token for user '%s' on remote '%s' ", user.Email, repo.Host)
} else {
if user_token != nil {
user.Access = user_token.AccessToken
user.Secret = user_token.RefreshToken
user.TokenExpiry = user_token.Expiry
datastore.PutUser(ctx, user)
}
// setup the post-commit hook with the remote system and
// and deactiveate this hook/user on the remote system
var hook = fmt.Sprintf("%s/api/hook/%s/%s", httputil.GetURL(r), repo.Remote, repo.Token)
if err := remote.Deactivate(user, repo, hook); err != nil {
log.Printf("[ERROR] deactivate on remote '%s' failed: %s", repo.Host, err)
}
}
}
// fail through: if any of the actions on the remote failed
// we try to delete the repo in our datastore anyway
if err := datastore.DelRepo(ctx, repo); err != nil {
w.WriteHeader(http.StatusInternalServerError)
} else {
w.WriteHeader(http.StatusNoContent)
}
}
// PostHook accepts a post-commit hook and parses the payload
// in order to trigger a build. The payload is specified to the
// remote system (ie GitHub) and will therefore get parsed by
// the appropriate remote plugin.
//
// GET /api/hook/:host
//
func PostHook(c web.C, w http.ResponseWriter, r *http.Request) {
var ctx = context.FromC(c)
var host = c.URLParams["host"]
var token = c.URLParams["token"]
var remote = remote.Lookup(host)
if remote == nil {
w.WriteHeader(http.StatusNotFound)
return
}
// parse the hook payload
hook, err := remote.ParseHook(r)
if err != nil {
log.Printf("Unable to parse hook. %s\n", err)
w.WriteHeader(http.StatusBadRequest)
return
}
// in some cases we have neither a hook nor error. An example
// would be GitHub sending a ping request to the URL, in which
// case we'll just exit quiely with an 'OK'
shouldSkip, _ := regexp.MatchString(`\[(?i:ci *skip|skip *ci)\]`, hook.Message)
if hook == nil || shouldSkip {
w.WriteHeader(http.StatusOK)
return
}
// fetch the repository from the database
repo, err := datastore.GetRepoName(ctx, remote.GetHost(), hook.Owner, hook.Repo)
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
// each hook contains a token to verify the sender. If the token
// is not provided or does not match, exit
if len(repo.Token) == 0 || repo.Token != token {
log.Printf("Rejected post commit hook for %s. Token mismatch\n", repo.Name)
w.WriteHeader(http.StatusUnauthorized)
return
}
if repo.Active == false ||
(repo.PostCommit == false && len(hook.PullRequest) == 0) ||
(repo.PullRequest == false && len(hook.PullRequest) != 0) {
w.WriteHeader(http.StatusNotFound)
return
}
// fetch the user from the database that owns this repo
user, err := datastore.GetUser(ctx, repo.UserID)
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
// Request a new token and update
user_token, err := remote.GetToken(user)
if user_token != nil {
user.Access = user_token.AccessToken
user.Secret = user_token.RefreshToken
user.TokenExpiry = user_token.Expiry
datastore.PutUser(ctx, user)
} else if err != nil {
log.Printf("Unable to refresh token. %s\n", err)
w.WriteHeader(http.StatusBadRequest)
return
}
// fetch the .drone.yml file from the database
yml, err := remote.GetScript(user, repo, hook)
if err != nil {
log.Printf("Unable to fetch .drone.yml file. %s\n", err)
w.WriteHeader(http.StatusBadRequest)
return
}
// verify the commit hooks branch matches the list of approved
// branches (unless it is a pull request). Note that we don't really
// care if parsing the yaml fails here.
s, _ := script.ParseBuild(string(yml))
if len(hook.PullRequest) == 0 && !s.MatchBranch(hook.Branch) {
w.WriteHeader(http.StatusOK)
return
}
commit := model.Commit{
RepoID: repo.ID,
Status: model.StatusEnqueue,
Sha: hook.Sha,
Branch: hook.Branch,
PullRequest: hook.PullRequest,
Timestamp: hook.Timestamp,
Message: hook.Message,
Config: string(yml),
}
commit.SetAuthor(hook.Author)
// inserts the commit into the database
if err := datastore.PostCommit(ctx, &commit); err != nil {
log.Printf("Unable to persist commit %s@%s. %s\n", commit.Sha, commit.Branch, err)
w.WriteHeader(http.StatusBadRequest)
return
}
owner, err := datastore.GetUser(ctx, repo.UserID)
if err != nil {
log.Printf("Unable to retrieve repository owner. %s.\n", err)
w.WriteHeader(http.StatusBadRequest)
return
}
// drop the items on the queue
go worker.Do(ctx, &worker.Work{
User: owner,
Repo: repo,
Commit: &commit,
Host: httputil.GetURL(r),
})
w.WriteHeader(http.StatusOK)
}
// PostRepo accapets a request to activate the named repository
// in the datastore. It returns a 201 status created if successful
//
// POST /api/repos/:host/:owner/:name
//
func PostRepo(c web.C, w http.ResponseWriter, r *http.Request) {
var ctx = context.FromC(c)
var repo = ToRepo(c)
var user = ToUser(c)
// update the repo active flag and fields
repo.Active = true
repo.PullRequest = true
repo.PostCommit = true
repo.UserID = user.ID
repo.Timeout = 3600 // default to 1 hour
// generate a secret key for post-commit hooks
if len(repo.Token) == 0 {
repo.Token = model.GenerateToken()
}
// generates the rsa key
if len(repo.PublicKey) == 0 || len(repo.PrivateKey) == 0 {
key, err := sshutil.GeneratePrivateKey()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
repo.PublicKey = sshutil.MarshalPublicKey(&key.PublicKey)
repo.PrivateKey = sshutil.MarshalPrivateKey(key)
}
var remote = remote.Lookup(repo.Host)
if remote == nil {
w.WriteHeader(http.StatusNotFound)
return
}
// Request a new token and update
user_token, err := remote.GetToken(user)
if user_token != nil {
user.Access = user_token.AccessToken
user.Secret = user_token.RefreshToken
user.TokenExpiry = user_token.Expiry
datastore.PutUser(ctx, user)
} else if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
// setup the post-commit hook with the remote system and
// if necessary, register the public key
var hook = fmt.Sprintf("%s/api/hook/%s/%s", httputil.GetURL(r), repo.Remote, repo.Token)
if err := remote.Activate(user, repo, hook); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if err := datastore.PutRepo(ctx, repo); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(repo)
}