mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-18 16:31:06 +00:00
590 lines
15 KiB
Go
590 lines
15 KiB
Go
package server
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/superseriousbusiness/oauth2/v4"
|
|
"github.com/superseriousbusiness/oauth2/v4/errors"
|
|
)
|
|
|
|
// NewDefaultServer create a default authorization server
|
|
func NewDefaultServer(manager oauth2.Manager) *Server {
|
|
return NewServer(NewConfig(), manager)
|
|
}
|
|
|
|
// NewServer create authorization server
|
|
func NewServer(cfg *Config, manager oauth2.Manager) *Server {
|
|
srv := &Server{
|
|
Config: cfg,
|
|
Manager: manager,
|
|
}
|
|
|
|
// default handler
|
|
srv.ClientInfoHandler = ClientBasicHandler
|
|
|
|
srv.UserAuthorizationHandler = func(w http.ResponseWriter, r *http.Request) (string, error) {
|
|
return "", errors.ErrAccessDenied
|
|
}
|
|
|
|
srv.PasswordAuthorizationHandler = func(username, password string) (string, error) {
|
|
return "", errors.ErrAccessDenied
|
|
}
|
|
return srv
|
|
}
|
|
|
|
// Server Provide authorization server
|
|
type Server struct {
|
|
Config *Config
|
|
Manager oauth2.Manager
|
|
ClientInfoHandler ClientInfoHandler
|
|
ClientAuthorizedHandler ClientAuthorizedHandler
|
|
ClientScopeHandler ClientScopeHandler
|
|
UserAuthorizationHandler UserAuthorizationHandler
|
|
PasswordAuthorizationHandler PasswordAuthorizationHandler
|
|
RefreshingValidationHandler RefreshingValidationHandler
|
|
RefreshingScopeHandler RefreshingScopeHandler
|
|
ResponseErrorHandler ResponseErrorHandler
|
|
InternalErrorHandler InternalErrorHandler
|
|
ExtensionFieldsHandler ExtensionFieldsHandler
|
|
AccessTokenExpHandler AccessTokenExpHandler
|
|
AuthorizeScopeHandler AuthorizeScopeHandler
|
|
}
|
|
|
|
func (s *Server) redirectError(w http.ResponseWriter, req *AuthorizeRequest, err error) error {
|
|
if req == nil {
|
|
return err
|
|
}
|
|
data, _, _ := s.GetErrorData(err)
|
|
return s.redirect(w, req, data)
|
|
}
|
|
|
|
func (s *Server) redirect(w http.ResponseWriter, req *AuthorizeRequest, data map[string]interface{}) error {
|
|
uri, err := s.GetRedirectURI(req, data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
w.Header().Set("Location", uri)
|
|
w.WriteHeader(302)
|
|
return nil
|
|
}
|
|
|
|
func (s *Server) tokenError(w http.ResponseWriter, err error) error {
|
|
data, statusCode, header := s.GetErrorData(err)
|
|
return s.token(w, data, header, statusCode)
|
|
}
|
|
|
|
func (s *Server) token(w http.ResponseWriter, data map[string]interface{}, header http.Header, statusCode ...int) error {
|
|
w.Header().Set("Content-Type", "application/json;charset=UTF-8")
|
|
w.Header().Set("Cache-Control", "no-store")
|
|
w.Header().Set("Pragma", "no-cache")
|
|
|
|
for key := range header {
|
|
w.Header().Set(key, header.Get(key))
|
|
}
|
|
|
|
status := http.StatusOK
|
|
if len(statusCode) > 0 && statusCode[0] > 0 {
|
|
status = statusCode[0]
|
|
}
|
|
|
|
w.WriteHeader(status)
|
|
return json.NewEncoder(w).Encode(data)
|
|
}
|
|
|
|
// GetRedirectURI get redirect uri
|
|
func (s *Server) GetRedirectURI(req *AuthorizeRequest, data map[string]interface{}) (string, error) {
|
|
u, err := url.Parse(req.RedirectURI)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
q := u.Query()
|
|
if req.State != "" {
|
|
q.Set("state", req.State)
|
|
}
|
|
|
|
for k, v := range data {
|
|
q.Set(k, fmt.Sprint(v))
|
|
}
|
|
|
|
switch req.ResponseType {
|
|
case oauth2.Code:
|
|
u.RawQuery = q.Encode()
|
|
case oauth2.Token:
|
|
u.RawQuery = ""
|
|
fragment, err := url.QueryUnescape(q.Encode())
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
u.Fragment = fragment
|
|
}
|
|
|
|
return u.String(), nil
|
|
}
|
|
|
|
// CheckResponseType check allows response type
|
|
func (s *Server) CheckResponseType(rt oauth2.ResponseType) bool {
|
|
for _, art := range s.Config.AllowedResponseTypes {
|
|
if art == rt {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// CheckCodeChallengeMethod checks for allowed code challenge method
|
|
func (s *Server) CheckCodeChallengeMethod(ccm oauth2.CodeChallengeMethod) bool {
|
|
for _, c := range s.Config.AllowedCodeChallengeMethods {
|
|
if c == ccm {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// ValidationAuthorizeRequest the authorization request validation
|
|
func (s *Server) ValidationAuthorizeRequest(r *http.Request) (*AuthorizeRequest, error) {
|
|
redirectURI := r.FormValue("redirect_uri")
|
|
clientID := r.FormValue("client_id")
|
|
if !(r.Method == "GET" || r.Method == "POST") ||
|
|
clientID == "" {
|
|
return nil, errors.ErrInvalidRequest
|
|
}
|
|
|
|
resType := oauth2.ResponseType(r.FormValue("response_type"))
|
|
if resType.String() == "" {
|
|
return nil, errors.ErrUnsupportedResponseType
|
|
} else if allowed := s.CheckResponseType(resType); !allowed {
|
|
return nil, errors.ErrUnauthorizedClient
|
|
}
|
|
|
|
cc := r.FormValue("code_challenge")
|
|
if cc == "" && s.Config.ForcePKCE {
|
|
return nil, errors.ErrCodeChallengeRquired
|
|
}
|
|
if cc != "" && (len(cc) < 43 || len(cc) > 128) {
|
|
return nil, errors.ErrInvalidCodeChallengeLen
|
|
}
|
|
|
|
ccm := oauth2.CodeChallengeMethod(r.FormValue("code_challenge_method"))
|
|
// set default
|
|
if ccm == "" {
|
|
ccm = oauth2.CodeChallengePlain
|
|
}
|
|
if ccm.String() != "" && !s.CheckCodeChallengeMethod(ccm) {
|
|
return nil, errors.ErrUnsupportedCodeChallengeMethod
|
|
}
|
|
|
|
req := &AuthorizeRequest{
|
|
RedirectURI: redirectURI,
|
|
ResponseType: resType,
|
|
ClientID: clientID,
|
|
State: r.FormValue("state"),
|
|
Scope: r.FormValue("scope"),
|
|
Request: r,
|
|
CodeChallenge: cc,
|
|
CodeChallengeMethod: ccm,
|
|
}
|
|
return req, nil
|
|
}
|
|
|
|
// GetAuthorizeToken get authorization token(code)
|
|
func (s *Server) GetAuthorizeToken(ctx context.Context, req *AuthorizeRequest) (oauth2.TokenInfo, error) {
|
|
// check the client allows the grant type
|
|
if fn := s.ClientAuthorizedHandler; fn != nil {
|
|
gt := oauth2.AuthorizationCode
|
|
if req.ResponseType == oauth2.Token {
|
|
gt = oauth2.Implicit
|
|
}
|
|
|
|
allowed, err := fn(req.ClientID, gt)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !allowed {
|
|
return nil, errors.ErrUnauthorizedClient
|
|
}
|
|
}
|
|
|
|
tgr := &oauth2.TokenGenerateRequest{
|
|
ClientID: req.ClientID,
|
|
UserID: req.UserID,
|
|
RedirectURI: req.RedirectURI,
|
|
Scope: req.Scope,
|
|
AccessTokenExp: req.AccessTokenExp,
|
|
Request: req.Request,
|
|
}
|
|
|
|
// check the client allows the authorized scope
|
|
if fn := s.ClientScopeHandler; fn != nil {
|
|
allowed, err := fn(tgr)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !allowed {
|
|
return nil, errors.ErrInvalidScope
|
|
}
|
|
}
|
|
|
|
tgr.CodeChallenge = req.CodeChallenge
|
|
tgr.CodeChallengeMethod = req.CodeChallengeMethod
|
|
|
|
return s.Manager.GenerateAuthToken(ctx, req.ResponseType, tgr)
|
|
}
|
|
|
|
// GetAuthorizeData get authorization response data
|
|
func (s *Server) GetAuthorizeData(rt oauth2.ResponseType, ti oauth2.TokenInfo) map[string]interface{} {
|
|
if rt == oauth2.Code {
|
|
return map[string]interface{}{
|
|
"code": ti.GetCode(),
|
|
}
|
|
}
|
|
return s.GetTokenData(ti)
|
|
}
|
|
|
|
// HandleAuthorizeRequest the authorization request handling
|
|
func (s *Server) HandleAuthorizeRequest(w http.ResponseWriter, r *http.Request) error {
|
|
ctx := r.Context()
|
|
|
|
req, err := s.ValidationAuthorizeRequest(r)
|
|
if err != nil {
|
|
return s.redirectError(w, req, err)
|
|
}
|
|
|
|
// user authorization
|
|
userID, err := s.UserAuthorizationHandler(w, r)
|
|
if err != nil {
|
|
return s.redirectError(w, req, err)
|
|
} else if userID == "" {
|
|
return nil
|
|
}
|
|
req.UserID = userID
|
|
|
|
// specify the scope of authorization
|
|
if fn := s.AuthorizeScopeHandler; fn != nil {
|
|
scope, err := fn(w, r)
|
|
if err != nil {
|
|
return err
|
|
} else if scope != "" {
|
|
req.Scope = scope
|
|
}
|
|
}
|
|
|
|
// specify the expiration time of access token
|
|
if fn := s.AccessTokenExpHandler; fn != nil {
|
|
exp, err := fn(w, r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
req.AccessTokenExp = exp
|
|
}
|
|
|
|
ti, err := s.GetAuthorizeToken(ctx, req)
|
|
if err != nil {
|
|
return s.redirectError(w, req, err)
|
|
}
|
|
|
|
// If the redirect URI is empty, the default domain provided by the client is used.
|
|
if req.RedirectURI == "" {
|
|
client, err := s.Manager.GetClient(ctx, req.ClientID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
req.RedirectURI = client.GetDomain()
|
|
}
|
|
|
|
return s.redirect(w, req, s.GetAuthorizeData(req.ResponseType, ti))
|
|
}
|
|
|
|
// ValidationTokenRequest the token request validation
|
|
func (s *Server) ValidationTokenRequest(r *http.Request) (oauth2.GrantType, *oauth2.TokenGenerateRequest, error) {
|
|
if v := r.Method; !(v == "POST" ||
|
|
(s.Config.AllowGetAccessRequest && v == "GET")) {
|
|
return "", nil, errors.ErrInvalidRequest
|
|
}
|
|
|
|
gt := oauth2.GrantType(r.FormValue("grant_type"))
|
|
if gt.String() == "" {
|
|
return "", nil, errors.ErrUnsupportedGrantType
|
|
}
|
|
|
|
if !s.CheckGrantType(gt) {
|
|
return "", nil, errors.ErrUnsupportedGrantType
|
|
}
|
|
|
|
clientID, clientSecret, err := s.ClientInfoHandler(r)
|
|
if err != nil {
|
|
return "", nil, err
|
|
}
|
|
|
|
tgr := &oauth2.TokenGenerateRequest{
|
|
ClientID: clientID,
|
|
ClientSecret: clientSecret,
|
|
Request: r,
|
|
}
|
|
|
|
switch gt {
|
|
case oauth2.AuthorizationCode:
|
|
tgr.RedirectURI = r.FormValue("redirect_uri")
|
|
tgr.Code = r.FormValue("code")
|
|
if tgr.RedirectURI == "" ||
|
|
tgr.Code == "" {
|
|
return "", nil, errors.ErrInvalidRequest
|
|
}
|
|
tgr.CodeVerifier = r.FormValue("code_verifier")
|
|
if s.Config.ForcePKCE && tgr.CodeVerifier == "" {
|
|
return "", nil, errors.ErrInvalidRequest
|
|
}
|
|
case oauth2.PasswordCredentials:
|
|
tgr.Scope = r.FormValue("scope")
|
|
username, password := r.FormValue("username"), r.FormValue("password")
|
|
if username == "" || password == "" {
|
|
return "", nil, errors.ErrInvalidRequest
|
|
}
|
|
|
|
userID, err := s.PasswordAuthorizationHandler(username, password)
|
|
if err != nil {
|
|
return "", nil, err
|
|
} else if userID == "" {
|
|
return "", nil, errors.ErrInvalidGrant
|
|
}
|
|
tgr.UserID = userID
|
|
case oauth2.ClientCredentials:
|
|
tgr.Scope = r.FormValue("scope")
|
|
tgr.RedirectURI = r.FormValue("redirect_uri")
|
|
case oauth2.Refreshing:
|
|
tgr.Refresh = r.FormValue("refresh_token")
|
|
tgr.Scope = r.FormValue("scope")
|
|
if tgr.Refresh == "" {
|
|
return "", nil, errors.ErrInvalidRequest
|
|
}
|
|
}
|
|
return gt, tgr, nil
|
|
}
|
|
|
|
// CheckGrantType check allows grant type
|
|
func (s *Server) CheckGrantType(gt oauth2.GrantType) bool {
|
|
for _, agt := range s.Config.AllowedGrantTypes {
|
|
if agt == gt {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// GetAccessToken access token
|
|
func (s *Server) GetAccessToken(ctx context.Context, gt oauth2.GrantType, tgr *oauth2.TokenGenerateRequest) (oauth2.TokenInfo,
|
|
error) {
|
|
if allowed := s.CheckGrantType(gt); !allowed {
|
|
return nil, errors.ErrUnauthorizedClient
|
|
}
|
|
|
|
if fn := s.ClientAuthorizedHandler; fn != nil {
|
|
allowed, err := fn(tgr.ClientID, gt)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !allowed {
|
|
return nil, errors.ErrUnauthorizedClient
|
|
}
|
|
}
|
|
|
|
switch gt {
|
|
case oauth2.AuthorizationCode:
|
|
ti, err := s.Manager.GenerateAccessToken(ctx, gt, tgr)
|
|
if err != nil {
|
|
switch err {
|
|
case errors.ErrInvalidAuthorizeCode, errors.ErrInvalidCodeChallenge, errors.ErrMissingCodeChallenge:
|
|
return nil, errors.ErrInvalidGrant
|
|
case errors.ErrInvalidClient:
|
|
return nil, errors.ErrInvalidClient
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
return ti, nil
|
|
case oauth2.PasswordCredentials, oauth2.ClientCredentials:
|
|
if fn := s.ClientScopeHandler; fn != nil {
|
|
allowed, err := fn(tgr)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !allowed {
|
|
return nil, errors.ErrInvalidScope
|
|
}
|
|
}
|
|
return s.Manager.GenerateAccessToken(ctx, gt, tgr)
|
|
case oauth2.Refreshing:
|
|
// check scope
|
|
if scopeFn := s.RefreshingScopeHandler; tgr.Scope != "" && scopeFn != nil {
|
|
rti, err := s.Manager.LoadRefreshToken(ctx, tgr.Refresh)
|
|
if err != nil {
|
|
if err == errors.ErrInvalidRefreshToken || err == errors.ErrExpiredRefreshToken {
|
|
return nil, errors.ErrInvalidGrant
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
allowed, err := scopeFn(tgr, rti.GetScope())
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !allowed {
|
|
return nil, errors.ErrInvalidScope
|
|
}
|
|
}
|
|
|
|
if validationFn := s.RefreshingValidationHandler; validationFn != nil {
|
|
rti, err := s.Manager.LoadRefreshToken(ctx, tgr.Refresh)
|
|
if err != nil {
|
|
if err == errors.ErrInvalidRefreshToken || err == errors.ErrExpiredRefreshToken {
|
|
return nil, errors.ErrInvalidGrant
|
|
}
|
|
return nil, err
|
|
}
|
|
allowed, err := validationFn(rti)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !allowed {
|
|
return nil, errors.ErrInvalidScope
|
|
}
|
|
}
|
|
|
|
ti, err := s.Manager.RefreshAccessToken(ctx, tgr)
|
|
if err != nil {
|
|
if err == errors.ErrInvalidRefreshToken || err == errors.ErrExpiredRefreshToken {
|
|
return nil, errors.ErrInvalidGrant
|
|
}
|
|
return nil, err
|
|
}
|
|
return ti, nil
|
|
}
|
|
|
|
return nil, errors.ErrUnsupportedGrantType
|
|
}
|
|
|
|
// GetTokenData token data
|
|
func (s *Server) GetTokenData(ti oauth2.TokenInfo) map[string]interface{} {
|
|
data := map[string]interface{}{
|
|
"access_token": ti.GetAccess(),
|
|
"token_type": s.Config.TokenType,
|
|
"expires_in": int64(ti.GetAccessExpiresIn() / time.Second),
|
|
}
|
|
|
|
if scope := ti.GetScope(); scope != "" {
|
|
data["scope"] = scope
|
|
}
|
|
|
|
if refresh := ti.GetRefresh(); refresh != "" {
|
|
data["refresh_token"] = refresh
|
|
}
|
|
|
|
if fn := s.ExtensionFieldsHandler; fn != nil {
|
|
ext := fn(ti)
|
|
for k, v := range ext {
|
|
if _, ok := data[k]; ok {
|
|
continue
|
|
}
|
|
data[k] = v
|
|
}
|
|
}
|
|
return data
|
|
}
|
|
|
|
// HandleTokenRequest token request handling
|
|
func (s *Server) HandleTokenRequest(w http.ResponseWriter, r *http.Request) error {
|
|
ctx := r.Context()
|
|
|
|
gt, tgr, err := s.ValidationTokenRequest(r)
|
|
if err != nil {
|
|
return s.tokenError(w, err)
|
|
}
|
|
|
|
ti, err := s.GetAccessToken(ctx, gt, tgr)
|
|
if err != nil {
|
|
return s.tokenError(w, err)
|
|
}
|
|
|
|
return s.token(w, s.GetTokenData(ti), nil)
|
|
}
|
|
|
|
// GetErrorData get error response data
|
|
func (s *Server) GetErrorData(err error) (map[string]interface{}, int, http.Header) {
|
|
var re errors.Response
|
|
if v, ok := errors.Descriptions[err]; ok {
|
|
re.Error = err
|
|
re.Description = v
|
|
re.StatusCode = errors.StatusCodes[err]
|
|
} else {
|
|
if fn := s.InternalErrorHandler; fn != nil {
|
|
if v := fn(err); v != nil {
|
|
re = *v
|
|
}
|
|
}
|
|
|
|
if re.Error == nil {
|
|
re.Error = errors.ErrServerError
|
|
re.Description = errors.Descriptions[errors.ErrServerError]
|
|
re.StatusCode = errors.StatusCodes[errors.ErrServerError]
|
|
}
|
|
}
|
|
|
|
if fn := s.ResponseErrorHandler; fn != nil {
|
|
fn(&re)
|
|
}
|
|
|
|
data := make(map[string]interface{})
|
|
if err := re.Error; err != nil {
|
|
data["error"] = err.Error()
|
|
}
|
|
|
|
if v := re.ErrorCode; v != 0 {
|
|
data["error_code"] = v
|
|
}
|
|
|
|
if v := re.Description; v != "" {
|
|
data["error_description"] = v
|
|
}
|
|
|
|
if v := re.URI; v != "" {
|
|
data["error_uri"] = v
|
|
}
|
|
|
|
statusCode := http.StatusInternalServerError
|
|
if v := re.StatusCode; v > 0 {
|
|
statusCode = v
|
|
}
|
|
|
|
return data, statusCode, re.Header
|
|
}
|
|
|
|
// BearerAuth parse bearer token
|
|
func (s *Server) BearerAuth(r *http.Request) (string, bool) {
|
|
auth := r.Header.Get("Authorization")
|
|
prefix := "Bearer "
|
|
token := ""
|
|
|
|
if auth != "" && strings.HasPrefix(auth, prefix) {
|
|
token = auth[len(prefix):]
|
|
} else {
|
|
token = r.FormValue("access_token")
|
|
}
|
|
|
|
return token, token != ""
|
|
}
|
|
|
|
// ValidationBearerToken validation the bearer tokens
|
|
// https://tools.ietf.org/html/rfc6750
|
|
func (s *Server) ValidationBearerToken(r *http.Request) (oauth2.TokenInfo, error) {
|
|
ctx := r.Context()
|
|
|
|
accessToken, ok := s.BearerAuth(r)
|
|
if !ok {
|
|
return nil, errors.ErrInvalidAccessToken
|
|
}
|
|
|
|
return s.Manager.LoadAccessToken(ctx, accessToken)
|
|
}
|