7 var signingMethods = map[string]func() SigningMethod{}
8 var signingMethodLock = new(sync.RWMutex)
10 // Implement SigningMethod to add new methods for signing or verifying tokens.
11 type SigningMethod interface {
12 Verify(signingString, signature string, key interface{}) error // Returns nil if signature is valid
13 Sign(signingString string, key interface{}) (string, error) // Returns encoded signature or error
14 Alg() string // returns the alg identifier for this method (example: 'HS256')
17 // Register the "alg" name and a factory function for signing method.
18 // This is typically done during init() in the method's implementation
19 func RegisterSigningMethod(alg string, f func() SigningMethod) {
20 signingMethodLock.Lock()
21 defer signingMethodLock.Unlock()
23 signingMethods[alg] = f
26 // Get a signing method from an "alg" string
27 func GetSigningMethod(alg string) (method SigningMethod) {
28 signingMethodLock.RLock()
29 defer signingMethodLock.RUnlock()
31 if methodF, ok := signingMethods[alg]; ok {