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* feat: support for clerk auth * chore: use auth modes for enabling provider * chore: use session id for cache instead of token * chore: error handling for jwt failure * chore: add support for cookies in auth middleware
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| package auth | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/clerkinc/clerk-sdk-go/clerk" | ||
| "github.com/flanksource/commons/logger" | ||
| "github.com/flanksource/incident-commander/api" | ||
| "github.com/flanksource/incident-commander/db" | ||
| "github.com/golang-jwt/jwt/v4" | ||
| "github.com/labstack/echo/v4" | ||
| "github.com/patrickmn/go-cache" | ||
| ) | ||
|
|
||
| const ( | ||
| clerkSessionCookie = "_session" | ||
| ) | ||
|
|
||
| type ClerkHandler struct { | ||
| client clerk.Client | ||
| dbJwtSecret string | ||
| tokenCache *cache.Cache | ||
| userCache *cache.Cache | ||
| } | ||
|
|
||
| func NewClerkHandler(secretKey, dbJwtSecret string) (*ClerkHandler, error) { | ||
| client, err := clerk.NewClient(secretKey) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &ClerkHandler{ | ||
| client: client, | ||
| dbJwtSecret: dbJwtSecret, | ||
| tokenCache: cache.New(3*24*time.Hour, 12*time.Hour), | ||
| userCache: cache.New(3*24*time.Hour, 12*time.Hour), | ||
| }, nil | ||
| } | ||
|
|
||
| func (h ClerkHandler) Session(next echo.HandlerFunc) echo.HandlerFunc { | ||
| return func(c echo.Context) error { | ||
| if canSkipAuth(c) { | ||
| return next(c) | ||
| } | ||
|
|
||
| // Extract session token from Authorization header | ||
| sessionToken := c.Request().Header.Get(echo.HeaderAuthorization) | ||
| sessionToken = strings.TrimPrefix(sessionToken, "Bearer ") | ||
| if sessionToken == "" { | ||
| // Check for `_session` cookie | ||
| sessionTokenCookie, err := c.Request().Cookie(clerkSessionCookie) | ||
| if err != nil { | ||
| // Cookie not found | ||
| return c.String(http.StatusUnauthorized, "Unauthorized") | ||
| } | ||
| sessionToken = sessionTokenCookie.Value | ||
| } | ||
|
|
||
| user, sessID, err := h.getUser(sessionToken) | ||
| if err != nil { | ||
| logger.Errorf("Error fetching user from clerk: %v", err) | ||
| return c.String(http.StatusUnauthorized, "Unauthorized") | ||
| } | ||
|
|
||
| ctx := c.(*api.Context) | ||
| if user.ExternalID == nil { | ||
| user, err = h.createDBUser(ctx, user) | ||
| if err != nil { | ||
| logger.Errorf("Error creating user in database from clerk: %v", err) | ||
| return c.String(http.StatusUnauthorized, "Unauthorized") | ||
| } | ||
| // Clear user from cache so that new metadata is used | ||
| h.userCache.Delete(sessID) | ||
| } | ||
|
|
||
| token, err := h.getDBToken(sessID, *user.ExternalID) | ||
| if err != nil { | ||
| logger.Errorf("Error generating JWT Token: %v", err) | ||
| return c.String(http.StatusUnauthorized, "Unauthorized") | ||
| } | ||
|
|
||
| c.Request().Header.Add(echo.HeaderAuthorization, fmt.Sprintf("Bearer %s", token)) | ||
| c.Request().Header.Add(UserIDHeaderKey, *user.ExternalID) | ||
| return next(c) | ||
| } | ||
| } | ||
|
|
||
| func (h *ClerkHandler) generateDBToken(id string) (string, error) { | ||
| token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{ | ||
| "role": DefaultPostgrestRole, | ||
| "id": id, | ||
| }) | ||
| return token.SignedString([]byte(h.dbJwtSecret)) | ||
| } | ||
|
|
||
| func (h *ClerkHandler) getDBToken(sessionID, userID string) (string, error) { | ||
| cacheKey := sessionID + userID | ||
| if token, exists := h.tokenCache.Get(cacheKey); exists { | ||
| return token.(string), nil | ||
| } | ||
| // Adding Authorization Token for PostgREST | ||
| token, err := h.generateDBToken(userID) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| h.tokenCache.SetDefault(cacheKey, token) | ||
| return token, nil | ||
| } | ||
|
|
||
| func (h *ClerkHandler) getUser(sessionToken string) (*clerk.User, string, error) { | ||
| sessClaims, err := h.client.VerifyToken(sessionToken) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| cacheKey := sessClaims.SessionID | ||
| if user, exists := h.userCache.Get(cacheKey); exists { | ||
| return user.(*clerk.User), sessClaims.SessionID, nil | ||
| } | ||
|
|
||
| user, err := h.client.Users().Read(sessClaims.Claims.Subject) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
| h.userCache.SetDefault(cacheKey, user) | ||
| return user, sessClaims.SessionID, nil | ||
| } | ||
|
|
||
| func (h *ClerkHandler) createDBUser(ctx *api.Context, user *clerk.User) (*clerk.User, error) { | ||
| if user.ExternalID != nil { | ||
| return user, nil | ||
| } | ||
| if user.PrimaryEmailAddressID == nil { | ||
| return nil, fmt.Errorf("clerk.user[%s] has no primary email", user.ID) | ||
| } | ||
|
|
||
| var email string | ||
| for _, addr := range user.EmailAddresses { | ||
| if addr.ID == *user.PrimaryEmailAddressID { | ||
| email = addr.EmailAddress | ||
| break | ||
| } | ||
| } | ||
|
|
||
| var name []string | ||
| if user.FirstName != nil { | ||
| name = append(name, *user.FirstName) | ||
| } | ||
| if user.LastName != nil { | ||
| name = append(name, *user.LastName) | ||
| } | ||
| person := api.Person{ | ||
| Name: strings.Join(name, " "), | ||
| Email: email, | ||
| } | ||
|
|
||
| dbUser, err := db.GetOrCreateUser(ctx, person) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| id := dbUser.ID.String() | ||
| userUpdateParams := clerk.UpdateUser{ | ||
| ExternalID: &id, | ||
| } | ||
| return h.client.Users().Update(user.ID, &userUpdateParams) | ||
| } |
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