fixes

jwt.go

@@ -33,6 +33,7 @@ func New(method SigningMethod) *Token {
 			"alg": method.Alg(),
 		},
 		Claims: make(map[string]interface{}),
+		Method: method,
 	}
 }
 
@@ -101,7 +102,8 @@ func Parse(tokenString string, keyFunc Keyfunc) (token *Token, err error) {
 
 		// Lookup signature method
 		if method, ok := token.Header["alg"].(string); ok {
-			if token.Method, err = GetSigningMethod(method); err != nil {
+			if token.Method = GetSigningMethod(method); token.Method == nil {
+				err = errors.New("Signing method (alg) is unavailable.")
 				return
 			}
 		} else {

signing_method.go

@@ -1,10 +1,5 @@
 package jwt
 
-import (
-	"errors"
-	"fmt"
-)
-
 var signingMethods = map[string]func() SigningMethod{}
 
 // Signing method
@@ -21,11 +16,9 @@ func RegisterSigningMethod(alg string, f func() SigningMethod) {
 }
 
 // Get a signing method from an "alg" string
-func GetSigningMethod(alg string) (method SigningMethod, err error) {
+func GetSigningMethod(alg string) (method SigningMethod) {
 	if methodF, ok := signingMethods[alg]; ok {
 		method = methodF()
-	} else {
-		err = errors.New(fmt.Sprintf("Invalid signing method (alg): %v", method))
 	}
 	return
 }