forked from vikunja/vikunja
81 lines
2.8 KiB
Go
81 lines
2.8 KiB
Go
// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public Licensee as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public Licensee for more details.
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//
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// You should have received a copy of the GNU Affero General Public Licensee
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package auth
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import (
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"code.vikunja.io/api/pkg/config"
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"github.com/dgrijalva/jwt-go"
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"github.com/labstack/echo/v4"
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"github.com/labstack/echo/v4/middleware"
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)
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// Resolves circular dependencies of auth -> IAP -> auth
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var authMiddlewares = map[AuthType]echo.MiddlewareFunc{}
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func RegisterAuthMiddleware(t AuthType, f echo.MiddlewareFunc) {
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authMiddlewares[t] = f
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}
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const authTokenJWTContextKey = "jwtToken"
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// GetJWTConfig returns the config for the default JWT middleware
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func GetJWTConfig() middleware.JWTConfig {
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return middleware.JWTConfig{
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SigningKey: []byte(config.ServiceJWTSecret.GetString()),
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SigningMethod: middleware.AlgorithmHS256,
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ContextKey: authTokenJWTContextKey,
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Claims: &AuthClaims{},
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}
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}
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// The auth middleware uses the JWT middleware to parse and validate a JWT.
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// If that does not succeed, it generates a JWT token from the identity-aware proxy
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func Middleware() echo.MiddlewareFunc {
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// Create a noop next function to let us run middlewares without jumping to the next
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// one in the chain
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noOpNext := func(_ echo.Context) error {
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return nil
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}
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jwtMiddleware := middleware.JWTWithConfig(GetJWTConfig())
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return func(next echo.HandlerFunc) echo.HandlerFunc {
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return func(c echo.Context) error {
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// First attempt to get auth from a provided JWT
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jwtErr := jwtMiddleware(noOpNext)(c)
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if c.Get(authTokenJWTContextKey) != nil && jwtErr == nil {
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// If it succeeded, use the authClaims from the JWT
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// and continue in the middleware chain
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jwtinf := c.Get(authTokenJWTContextKey).(*jwt.Token)
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claims := jwtinf.Claims.(*AuthClaims)
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c.Set(AuthClaimsContextKey, claims)
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return next(c)
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}
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// Otherwise, attempt to get auth from authMiddlewares
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for _, authMiddleware := range authMiddlewares {
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err := authMiddleware(noOpNext)(c)
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if c.Get(AuthClaimsContextKey) != nil && err == nil {
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// If it succeeded, continue in the middleware chain
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return next(c)
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}
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}
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// Otherwise, return the original error from jwt middleware
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return jwtErr
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}
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}
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}
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