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auth_jwt.go
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/
auth_jwt.go
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// Copyright (c) 2021 BitMaelum Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package auth
import (
"context"
"net/http"
"strings"
"github.com/bitmaelum/bitmaelum-suite/cmd/bm-server/internal/container"
"github.com/bitmaelum/bitmaelum-suite/cmd/bm-server/middleware"
"github.com/bitmaelum/bitmaelum-suite/internal/api"
"github.com/bitmaelum/bitmaelum-suite/pkg/hash"
"github.com/gorilla/mux"
"github.com/sirupsen/logrus"
"github.com/vtolstov/jwt-go"
)
// JwtAuth is a middleware that automatically verifies given JWT token
type JwtAuth struct{}
// Authenticate will check if an API key matches the request
func (mw *JwtAuth) Authenticate(req *http.Request, _ string) (middleware.AuthStatus, context.Context, error) {
// Check if the address actually exists
haddr, err := hash.NewFromHash(mux.Vars(req)["addr"])
if err != nil {
return middleware.AuthStatusPass, nil, nil
}
accountRepo := container.Instance.GetAccountRepo()
if !accountRepo.Exists(*haddr) {
logrus.Trace("auth: address not found")
return middleware.AuthStatusPass, nil, nil
}
// Check token
token, err := checkToken(req.Header.Get("Authorization"), *haddr)
if err != nil {
if err == api.ErrTokenTimeNotValid {
logrus.Trace("auth: invalid time for token: ", err)
return middleware.AuthStatusFailure, nil, err
}
logrus.Trace("auth: incorrect token: ", err)
return middleware.AuthStatusPass, nil, nil
}
ctx := req.Context()
ctx = context.WithValue(ctx, middleware.ClaimsContext, token.Claims)
ctx = context.WithValue(ctx, middleware.AddressContext, token.Claims.(*jwt.StandardClaims).Subject)
return middleware.AuthStatusSuccess, ctx, nil
}
// Check if the authorization contains a valid JWT token for the given address
func checkToken(bearerToken string, addr hash.Hash) (*jwt.Token, error) {
if bearerToken == "" {
logrus.Trace("auth: empty auth string")
return nil, api.ErrTokenNotValid
}
if len(bearerToken) <= 6 || strings.ToUpper(bearerToken[0:7]) != "BEARER " {
logrus.Trace("auth: bearer not found")
return nil, api.ErrTokenNotValid
}
tokenString := bearerToken[7:]
accountRepo := container.Instance.GetAccountRepo()
keys, err := accountRepo.FetchKeys(addr)
if err != nil {
logrus.Trace("auth: cannot fetch keys: ", err)
return nil, api.ErrTokenNotValid
}
for _, key := range keys {
token, err := api.ValidateJWTToken(tokenString, addr, key)
// If the token is not valid in time, we can fail directly
if err == api.ErrTokenTimeNotValid {
logrus.Trace("auth: no key found that validates the token")
return nil, api.ErrTokenTimeNotValid
}
// no error, we can return the token
if err == nil {
return token, nil
}
}
// No valid tokens found after matching all keys. Return generic error
logrus.Trace("auth: no key found that validates the token")
return nil, api.ErrTokenNotValid
}