vendor: update buildkit to master@ae9d0f5

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/golang-jwt/jwt/v4/errors.go

@@ -9,6 +9,18 @@ var (
 	ErrInvalidKey      = errors.New("key is invalid")
 	ErrInvalidKeyType  = errors.New("key is of invalid type")
 	ErrHashUnavailable = errors.New("the requested hash function is unavailable")
+
+	ErrTokenMalformed        = errors.New("token is malformed")
+	ErrTokenUnverifiable     = errors.New("token is unverifiable")
+	ErrTokenSignatureInvalid = errors.New("token signature is invalid")
+
+	ErrTokenInvalidAudience  = errors.New("token has invalid audience")
+	ErrTokenExpired          = errors.New("token is expired")
+	ErrTokenUsedBeforeIssued = errors.New("token used before issued")
+	ErrTokenInvalidIssuer    = errors.New("token has invalid issuer")
+	ErrTokenNotValidYet      = errors.New("token is not valid yet")
+	ErrTokenInvalidId        = errors.New("token has invalid id")
+	ErrTokenInvalidClaims    = errors.New("token has invalid claims")
 )
 
 // The errors that might occur when parsing and validating a token
@@ -62,3 +74,39 @@ func (e *ValidationError) Unwrap() error {
 func (e *ValidationError) valid() bool {
 	return e.Errors == 0
 }
+
+// Is checks if this ValidationError is of the supplied error. We are first checking for the exact error message
+// by comparing the inner error message. If that fails, we compare using the error flags. This way we can use
+// custom error messages (mainly for backwards compatability) and still leverage errors.Is using the global error variables.
+func (e *ValidationError) Is(err error) bool {
+	// Check, if our inner error is a direct match
+	if errors.Is(errors.Unwrap(e), err) {
+		return true
+	}
+
+	// Otherwise, we need to match using our error flags
+	switch err {
+	case ErrTokenMalformed:
+		return e.Errors&ValidationErrorMalformed != 0
+	case ErrTokenUnverifiable:
+		return e.Errors&ValidationErrorUnverifiable != 0
+	case ErrTokenSignatureInvalid:
+		return e.Errors&ValidationErrorSignatureInvalid != 0
+	case ErrTokenInvalidAudience:
+		return e.Errors&ValidationErrorAudience != 0
+	case ErrTokenExpired:
+		return e.Errors&ValidationErrorExpired != 0
+	case ErrTokenUsedBeforeIssued:
+		return e.Errors&ValidationErrorIssuedAt != 0
+	case ErrTokenInvalidIssuer:
+		return e.Errors&ValidationErrorIssuer != 0
+	case ErrTokenNotValidYet:
+		return e.Errors&ValidationErrorNotValidYet != 0
+	case ErrTokenInvalidId:
+		return e.Errors&ValidationErrorId != 0
+	case ErrTokenInvalidClaims:
+		return e.Errors&ValidationErrorClaimsInvalid != 0
+	}
+
+	return false
+}