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@ -2,14 +2,17 @@ package writefreely |
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import ( |
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"context" |
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"encoding/hex" |
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"encoding/json" |
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"fmt" |
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"github.com/gorilla/mux" |
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"github.com/gorilla/sessions" |
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"github.com/guregu/null/zero" |
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"github.com/writeas/nerds/store" |
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"github.com/writeas/web-core/auth" |
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"github.com/writeas/web-core/log" |
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"github.com/writeas/writefreely/config" |
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"hash/fnv" |
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"io" |
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"io/ioutil" |
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"net/http" |
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@ -55,11 +58,12 @@ type OAuthDatastoreProvider interface { |
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// OAuthDatastore provides a minimal interface of data store methods used in
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// oauth functionality.
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type OAuthDatastore interface { |
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GenerateOAuthState(context.Context) (string, error) |
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ValidateOAuthState(context.Context, string) error |
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GetIDForRemoteUser(context.Context, int64) (int64, error) |
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CreateUser(*config.Config, *User, string) error |
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RecordRemoteUserID(context.Context, int64, int64) error |
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ValidateOAuthState(context.Context, string, string, string) error |
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GenerateOAuthState(context.Context, string, string) (string, error) |
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CreateUser(*config.Config, *User, string) error |
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GetUserForAuthByID(int64) (*User, error) |
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} |
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@ -75,8 +79,8 @@ type oauthHandler struct { |
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} |
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// buildAuthURL returns a URL used to initiate authentication.
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func buildAuthURL(db OAuthDatastore, ctx context.Context, clientID, authLocation, callbackURL string) (string, error) { |
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state, err := db.GenerateOAuthState(ctx) |
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func buildAuthURL(db OAuthDatastore, ctx context.Context, provider, clientID, authLocation, callbackURL string) (string, error) { |
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state, err := db.GenerateOAuthState(ctx, provider, clientID) |
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if err != nil { |
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return "", err |
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} |
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@ -95,9 +99,17 @@ func buildAuthURL(db OAuthDatastore, ctx context.Context, clientID, authLocation |
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return u.String(), nil |
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} |
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// app *App, w http.ResponseWriter, r *http.Request
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func (h oauthHandler) viewOauthInit(w http.ResponseWriter, r *http.Request) { |
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location, err := buildAuthURL(h.DB, r.Context(), h.Config.App.OAuthClientID, h.Config.App.OAuthProviderAuthLocation, h.Config.App.OAuthClientCallbackLocation) |
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func (h oauthHandler) viewOauthInitWriteAs(w http.ResponseWriter, r *http.Request) { |
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location, err := buildAuthURL(h.DB, r.Context(), "write.as", h.Config.App.OAuth.WriteAsClientID, h.Config.App.OAuth.WriteAsProviderAuthLocation, h.Config.App.OAuth.WriteAsClientCallbackLocation) |
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if err != nil { |
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failOAuthRequest(w, http.StatusInternalServerError, "could not prepare oauth redirect url") |
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return |
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} |
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http.Redirect(w, r, location, http.StatusTemporaryRedirect) |
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} |
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func (h oauthHandler) viewOauthInitSlack(w http.ResponseWriter, r *http.Request) { |
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location, err := buildAuthURL(h.DB, r.Context(), "slack", h.Config.App.OAuth.WriteAsClientID, h.Config.App.OAuth.WriteAsProviderAuthLocation, h.Config.App.OAuth.WriteAsClientCallbackLocation) |
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if err != nil { |
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failOAuthRequest(w, http.StatusInternalServerError, "could not prepare oauth redirect url") |
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return |
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@ -105,13 +117,37 @@ func (h oauthHandler) viewOauthInit(w http.ResponseWriter, r *http.Request) { |
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http.Redirect(w, r, location, http.StatusTemporaryRedirect) |
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} |
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func (h oauthHandler) viewOauthCallback(w http.ResponseWriter, r *http.Request) { |
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func (h oauthHandler) configureRoutes(r *mux.Router) { |
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if h.Config.App.OAuth.Enabled { |
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if h.Config.App.OAuth.WriteAsClientID != "" { |
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callbackHash := oauthProviderHash("write.as", h.Config.App.OAuth.WriteAsClientID) |
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log.InfoLog.Println("write.as oauth callback URL", "/oauth/callback/"+callbackHash) |
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r.HandleFunc("/oauth/write.as", h.viewOauthInitWriteAs).Methods("GET") |
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r.HandleFunc("/oauth/callback/"+callbackHash, h.viewOauthCallback("write.as", h.Config.App.OAuth.WriteAsClientID)).Methods("GET") |
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} |
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if h.Config.App.OAuth.SlackClientID != "" { |
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callbackHash := oauthProviderHash("slack", h.Config.App.OAuth.SlackClientID) |
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log.InfoLog.Println("slack oauth callback URL", "/oauth/callback/"+callbackHash) |
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r.HandleFunc("/oauth/slack", h.viewOauthInitSlack).Methods("GET") |
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r.HandleFunc("/oauth/callback/"+callbackHash, h.viewOauthCallback("slack", h.Config.App.OAuth.SlackClientID)).Methods("GET") |
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} |
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} |
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} |
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func oauthProviderHash(provider, clientID string) string { |
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hasher := fnv.New32() |
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return hex.EncodeToString(hasher.Sum([]byte(provider + clientID))) |
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} |
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func (h oauthHandler) viewOauthCallback(provider, clientID string) http.HandlerFunc { |
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return func(w http.ResponseWriter, r *http.Request) { |
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ctx := r.Context() |
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code := r.FormValue("code") |
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state := r.FormValue("state") |
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err := h.DB.ValidateOAuthState(ctx, state) |
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err := h.DB.ValidateOAuthState(ctx, state, provider, clientID) |
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if err != nil { |
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failOAuthRequest(w, http.StatusInternalServerError, err.Error()) |
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return |
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@ -186,13 +222,14 @@ func (h oauthHandler) viewOauthCallback(w http.ResponseWriter, r *http.Request) |
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failOAuthRequest(w, http.StatusInternalServerError, err.Error()) |
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} |
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} |
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} |
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func (h oauthHandler) exchangeOauthCode(ctx context.Context, code string) (*TokenResponse, error) { |
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form := url.Values{} |
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form.Add("grant_type", "authorization_code") |
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form.Add("redirect_uri", h.Config.App.OAuthClientCallbackLocation) |
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form.Add("redirect_uri", h.Config.App.OAuth.WriteAsClientCallbackLocation) |
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form.Add("code", code) |
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req, err := http.NewRequest("POST", h.Config.App.OAuthProviderTokenLocation, strings.NewReader(form.Encode())) |
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req, err := http.NewRequest("POST", h.Config.App.OAuth.WriteAsProviderTokenLocation, strings.NewReader(form.Encode())) |
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if err != nil { |
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return nil, err |
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} |
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@ -200,7 +237,7 @@ func (h oauthHandler) exchangeOauthCode(ctx context.Context, code string) (*Toke |
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req.Header.Set("User-Agent", "writefreely") |
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req.Header.Set("Accept", "application/json") |
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req.Header.Set("Content-Type", "application/x-www-form-urlencoded") |
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req.SetBasicAuth(h.Config.App.OAuthClientID, h.Config.App.OAuthClientSecret) |
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req.SetBasicAuth(h.Config.App.OAuth.WriteAsClientID, h.Config.App.OAuth.WriteAsClientSecret) |
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resp, err := h.HttpClient.Do(req) |
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if err != nil { |
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@ -224,7 +261,7 @@ func (h oauthHandler) exchangeOauthCode(ctx context.Context, code string) (*Toke |
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} |
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func (h oauthHandler) inspectOauthAccessToken(ctx context.Context, accessToken string) (*InspectResponse, error) { |
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req, err := http.NewRequest("GET", h.Config.App.OAuthProviderInspectLocation, nil) |
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req, err := http.NewRequest("GET", h.Config.App.OAuth.WriteAsProviderInspectLocation, nil) |
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if err != nil { |
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return nil, err |
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} |
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