Remove `StandardClaims` in favor of `RegisteredClaims` (#235)

This PR removes the old legacy standard claims, which have been deprecated since the beginning of the `v4` module in favor of the newer `RegisteredClaims`. Removing them before any further changes to the validation API is quite useful, as less code needs to be adapated.

claims.go

@@ -119,102 +119,6 @@ func (c *RegisteredClaims) VerifyIssuer(cmp string, req bool) bool {
 	return verifyIss(c.Issuer, cmp, req)
 }
 
-// StandardClaims are a structured version of the JWT Claims Set, as referenced at
-// https://datatracker.ietf.org/doc/html/rfc7519#section-4. They do not follow the
-// specification exactly, since they were based on an earlier draft of the
-// specification and not updated. The main difference is that they only
-// support integer-based date fields and singular audiences. This might lead to
-// incompatibilities with other JWT implementations. The use of this is discouraged, instead
-// the newer RegisteredClaims struct should be used.
-//
-// Deprecated: Use RegisteredClaims instead for a forward-compatible way to access registered claims in a struct.
-type StandardClaims struct {
-	Audience  string `json:"aud,omitempty"`
-	ExpiresAt int64  `json:"exp,omitempty"`
-	Id        string `json:"jti,omitempty"`
-	IssuedAt  int64  `json:"iat,omitempty"`
-	Issuer    string `json:"iss,omitempty"`
-	NotBefore int64  `json:"nbf,omitempty"`
-	Subject   string `json:"sub,omitempty"`
-}
-
-// Valid validates time based claims "exp, iat, nbf". There is no accounting for clock skew.
-// As well, if any of the above claims are not in the token, it will still
-// be considered a valid claim.
-func (c StandardClaims) Valid() error {
-	vErr := new(ValidationError)
-	now := TimeFunc().Unix()
-
-	// The claims below are optional, by default, so if they are set to the
-	// default value in Go, let's not fail the verification for them.
-	if !c.VerifyExpiresAt(now, false) {
-		delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
-		vErr.Inner = fmt.Errorf("%s by %s", ErrTokenExpired, delta)
-		vErr.Errors |= ValidationErrorExpired
-	}
-
-	if !c.VerifyIssuedAt(now, false) {
-		vErr.Inner = ErrTokenUsedBeforeIssued
-		vErr.Errors |= ValidationErrorIssuedAt
-	}
-
-	if !c.VerifyNotBefore(now, false) {
-		vErr.Inner = ErrTokenNotValidYet
-		vErr.Errors |= ValidationErrorNotValidYet
-	}
-
-	if vErr.valid() {
-		return nil
-	}
-
-	return vErr
-}
-
-// VerifyAudience compares the aud claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
-func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
-	return verifyAud([]string{c.Audience}, cmp, req)
-}
-
-// VerifyExpiresAt compares the exp claim against cmp (cmp < exp).
-// If req is false, it will return true, if exp is unset.
-func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
-	if c.ExpiresAt == 0 {
-		return verifyExp(nil, time.Unix(cmp, 0), req)
-	}
-
-	t := time.Unix(c.ExpiresAt, 0)
-	return verifyExp(&t, time.Unix(cmp, 0), req)
-}
-
-// VerifyIssuedAt compares the iat claim against cmp (cmp >= iat).
-// If req is false, it will return true, if iat is unset.
-func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
-	if c.IssuedAt == 0 {
-		return verifyIat(nil, time.Unix(cmp, 0), req)
-	}
-
-	t := time.Unix(c.IssuedAt, 0)
-	return verifyIat(&t, time.Unix(cmp, 0), req)
-}
-
-// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
-// If req is false, it will return true, if nbf is unset.
-func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
-	if c.NotBefore == 0 {
-		return verifyNbf(nil, time.Unix(cmp, 0), req)
-	}
-
-	t := time.Unix(c.NotBefore, 0)
-	return verifyNbf(&t, time.Unix(cmp, 0), req)
-}
-
-// VerifyIssuer compares the iss claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
-func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
-	return verifyIss(c.Issuer, cmp, req)
-}
-
 // ----- helpers
 
 func verifyAud(aud []string, cmp string, required bool) bool {

parser_test.go

@@ -199,19 +199,6 @@ var jwtTestData = []struct {
 		&jwt.Parser{UseJSONNumber: true},
 		jwt.SigningMethodRS256,
 	},
-	{
-		"Standard Claims",
-		"",
-		defaultKeyFunc,
-		&jwt.StandardClaims{
-			ExpiresAt: time.Now().Add(time.Second * 10).Unix(),
-		},
-		true,
-		0,
-		nil,
-		&jwt.Parser{UseJSONNumber: true},
-		jwt.SigningMethodRS256,
-	},
 	{
 		"JSON Number - basic expired",
 		"", // autogen
@@ -360,8 +347,6 @@ func TestParser_Parse(t *testing.T) {
 			switch data.claims.(type) {
 			case jwt.MapClaims:
 				token, err = parser.ParseWithClaims(data.tokenString, jwt.MapClaims{}, data.keyfunc)
-			case *jwt.StandardClaims:
-				token, err = parser.ParseWithClaims(data.tokenString, &jwt.StandardClaims{}, data.keyfunc)
 			case *jwt.RegisteredClaims:
 				token, err = parser.ParseWithClaims(data.tokenString, &jwt.RegisteredClaims{}, data.keyfunc)
 			}
@@ -454,8 +439,6 @@ func TestParser_ParseUnverified(t *testing.T) {
 			switch data.claims.(type) {
 			case jwt.MapClaims:
 				token, _, err = parser.ParseUnverified(data.tokenString, jwt.MapClaims{})
-			case *jwt.StandardClaims:
-				token, _, err = parser.ParseUnverified(data.tokenString, &jwt.StandardClaims{})
 			case *jwt.RegisteredClaims:
 				token, _, err = parser.ParseUnverified(data.tokenString, &jwt.RegisteredClaims{})
 			}
@@ -695,9 +678,9 @@ func BenchmarkParseUnverified(b *testing.B) {
 			b.Run("map_claims", func(b *testing.B) {
 				benchmarkParsing(b, parser, data.tokenString, jwt.MapClaims{})
 			})
-		case *jwt.StandardClaims:
+		case *jwt.RegisteredClaims:
-			b.Run("standard_claims", func(b *testing.B) {
+			b.Run("registered_claims", func(b *testing.B) {
-				benchmarkParsing(b, parser, data.tokenString, &jwt.StandardClaims{})
+				benchmarkParsing(b, parser, data.tokenString, &jwt.RegisteredClaims{})
 			})
 		}
 	}

token_test.go

@@ -30,7 +30,7 @@ func TestToken_SigningString(t1 *testing.T) {
 					"typ": "JWT",
 					"alg": jwt.SigningMethodHS256.Alg(),
 				},
-				Claims:    jwt.StandardClaims{},
+				Claims:    jwt.RegisteredClaims{},
 				Signature: "",
 				Valid:     false,
 			},
@@ -67,7 +67,7 @@ func BenchmarkToken_SigningString(b *testing.B) {
 			"typ": "JWT",
 			"alg": jwt.SigningMethodHS256.Alg(),
 		},
-		Claims: jwt.StandardClaims{},
+		Claims: jwt.RegisteredClaims{},
 	}
 	b.Run("BenchmarkToken_SigningString", func(b *testing.B) {
 		b.ResetTimer()