mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2025-01-03 08:37:37 +00:00
94 lines
2.8 KiB
Go
94 lines
2.8 KiB
Go
package rpc
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import (
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"context"
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"fmt"
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"net/http"
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"strings"
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"github.com/golang-jwt/jwt/v4"
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"github.com/prysmaticlabs/prysm/v4/api"
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"github.com/sirupsen/logrus"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/status"
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)
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// JWTInterceptor is a gRPC unary interceptor to authorize incoming requests.
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func (s *Server) JWTInterceptor() grpc.UnaryServerInterceptor {
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return func(
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ctx context.Context,
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req interface{},
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info *grpc.UnaryServerInfo,
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handler grpc.UnaryHandler,
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) (interface{}, error) {
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if err := s.authorize(ctx); err != nil {
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return nil, err
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}
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h, err := handler(ctx, req)
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log.WithError(err).WithFields(logrus.Fields{
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"FullMethod": info.FullMethod,
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"Server": info.Server,
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}).Debug("Request handled")
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return h, err
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}
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}
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// JwtHttpInterceptor is an HTTP handler to authorize a route.
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func (s *Server) JwtHttpInterceptor(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// if it's not initialize or has a web prefix
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if strings.Contains(r.URL.Path, api.WebApiUrlPrefix) || strings.Contains(r.URL.Path, api.KeymanagerApiPrefix) {
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// ignore some routes
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reqToken := r.Header.Get("Authorization")
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if reqToken == "" {
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http.Error(w, "unauthorized: no Authorization header passed. Please use an Authorization header with the jwt created in the prysm wallet", http.StatusUnauthorized)
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return
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}
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tokenParts := strings.Split(reqToken, "Bearer ")
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if len(tokenParts) != 2 {
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http.Error(w, "Invalid token format", http.StatusBadRequest)
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return
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}
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token := tokenParts[1]
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_, err := jwt.Parse(token, s.validateJWT)
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if err != nil {
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http.Error(w, fmt.Errorf("forbidden: could not parse JWT token: %v", err).Error(), http.StatusForbidden)
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return
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}
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}
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next.ServeHTTP(w, r)
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})
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}
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// Authorize the token received is valid.
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func (s *Server) authorize(ctx context.Context) error {
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md, ok := metadata.FromIncomingContext(ctx)
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if !ok {
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return status.Errorf(codes.InvalidArgument, "Retrieving metadata failed")
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}
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authHeader, ok := md["authorization"]
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if !ok {
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return status.Errorf(codes.Unauthenticated, "Authorization token could not be found")
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}
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if len(authHeader) < 1 || !strings.Contains(authHeader[0], "Bearer ") {
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return status.Error(codes.Unauthenticated, "Invalid auth header, needs Bearer {token}")
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}
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token := strings.Split(authHeader[0], "Bearer ")[1]
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_, err := jwt.Parse(token, s.validateJWT)
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if err != nil {
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return status.Errorf(codes.Unauthenticated, "Could not parse JWT token: %v", err)
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}
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return nil
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}
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func (s *Server) validateJWT(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected JWT signing method: %v", token.Header["alg"])
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}
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return s.jwtSecret, nil
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}
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