Parser flag to skip claims validation during token parsing

parser.go

@@ -10,6 +10,7 @@ import (
 type Parser struct {
 	ValidMethods         []string // If populated, only these methods will be considered valid
 	UseJSONNumber        bool     // Use JSON Number format in JSON decoder
+	SkipClaimsValidation bool     // Skip claims validation during token parsing
 }
 
 // Parse, validate, and return a token.
@@ -101,6 +102,7 @@ func (p *Parser) ParseWithClaims(tokenString string, claims Claims, keyFunc Keyf
 	vErr := &ValidationError{}
 
 	// Validate Claims
+	if !p.SkipClaimsValidation {
 		if err := token.Claims.Valid(); err != nil {
 
 			// If the Claims Valid returned an error, check if it is a validation error,
@@ -111,6 +113,7 @@ func (p *Parser) ParseWithClaims(tokenString string, claims Claims, keyFunc Keyf
 				vErr = e
 			}
 		}
+	}
 
 	// Perform validation
 	token.Signature = parts[2]

parser_test.go

@@ -172,6 +172,15 @@ var jwtTestData = []struct {
 		jwt.ValidationErrorNotValidYet | jwt.ValidationErrorExpired,
 		&jwt.Parser{UseJSONNumber: true},
 	},
+	{
+		"SkipClaimsValidation during token parsing",
+		"", // autogen
+		defaultKeyFunc,
+		jwt.MapClaims{"foo": "bar", "nbf": json.Number(fmt.Sprintf("%v", time.Now().Unix()+100))},
+		true,
+		0,
+		&jwt.Parser{UseJSONNumber: true, SkipClaimsValidation: true},
+	},
 }
 
 func TestParser_Parse(t *testing.T) {