Mercurial > gemma
annotate auth/middleware.go @ 236:664fe6536141
merged.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 26 Jul 2018 15:43:19 +0200 |
parents | 8a226dc1c6ff |
children | 3771788d3dae |
rev | line source |
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Added first middleware for JWT token extraction. TODO: Add second one to check against logged in users.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package auth |
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2 |
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3 import ( |
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4 "context" |
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5 "net/http" |
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6 "strings" |
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7 ) |
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8 |
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9 type contextType int |
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10 |
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11 const ( |
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12 sessionKey contextType = iota |
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13 tokenKey |
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14 ) |
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15 |
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16 func GetSession(req *http.Request) (*Session, bool) { |
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17 session, ok := req.Context().Value(sessionKey).(*Session) |
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18 return session, ok |
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19 } |
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20 |
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21 func GetToken(req *http.Request) (string, bool) { |
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22 token, ok := req.Context().Value(tokenKey).(string) |
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23 return token, ok |
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24 } |
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25 |
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26 func SessionMiddleware(next http.Handler) http.Handler { |
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27 |
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28 return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { |
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29 |
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30 auth := req.Header.Get("X-Gemma-Auth") |
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31 |
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32 token := strings.TrimSpace(auth) |
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33 if token == "" { |
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34 http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized) |
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35 return |
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36 } |
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37 |
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38 session := ConnPool.Session(token) |
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39 if session == nil { |
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40 http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized) |
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41 return |
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42 } |
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43 |
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44 ctx := req.Context() |
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45 ctx = context.WithValue(ctx, sessionKey, session) |
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46 ctx = context.WithValue(ctx, tokenKey, token) |
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47 req = req.WithContext(ctx) |
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48 |
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49 next.ServeHTTP(rw, req) |
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50 }) |
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51 } |
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52 |
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53 func SessionChecker(next http.Handler, check func(*Session) bool) http.Handler { |
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54 return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { |
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55 claims, ok := GetSession(req) |
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56 if !ok || !check(claims) { |
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57 http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized) |
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58 return |
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59 } |
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60 next.ServeHTTP(rw, req) |
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61 }) |
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62 } |
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63 |
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64 func HasRole(roles ...string) func(*Session) bool { |
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65 return func(session *Session) bool { |
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66 for _, r1 := range roles { |
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67 for _, r2 := range session.Roles { |
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68 if r1 == r2 { |
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69 return true |
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70 } |
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71 } |
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72 } |
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73 return false |
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74 } |
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75 } |
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76 |
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77 func EnsureRole(roles ...string) func(func(http.ResponseWriter, *http.Request)) http.Handler { |
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78 return func(fn func(http.ResponseWriter, *http.Request)) http.Handler { |
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79 return SessionMiddleware(SessionChecker(http.HandlerFunc(fn), HasRole(roles...))) |
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80 } |
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81 } |