Support webauthn (#17957)

Migrate from U2F to Webauthn

Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

vendor/github.com/cloudflare/cfssl/errors/http.go

@@ -0,0 +1,47 @@
+package errors
+
+import (
+	"errors"
+	"net/http"
+)
+
+// HTTPError is an augmented error with a HTTP status code.
+type HTTPError struct {
+	StatusCode int
+	error
+}
+
+// Error implements the error interface.
+func (e *HTTPError) Error() string {
+	return e.error.Error()
+}
+
+// NewMethodNotAllowed returns an appropriate error in the case that
+// an HTTP client uses an invalid method (i.e. a GET in place of a POST)
+// on an API endpoint.
+func NewMethodNotAllowed(method string) *HTTPError {
+	return &HTTPError{http.StatusMethodNotAllowed, errors.New(`Method is not allowed:"` + method + `"`)}
+}
+
+// NewBadRequest creates a HttpError with the given error and error code 400.
+func NewBadRequest(err error) *HTTPError {
+	return &HTTPError{http.StatusBadRequest, err}
+}
+
+// NewBadRequestString returns a HttpError with the supplied message
+// and error code 400.
+func NewBadRequestString(s string) *HTTPError {
+	return NewBadRequest(errors.New(s))
+}
+
+// NewBadRequestMissingParameter returns a 400 HttpError as a required
+// parameter is missing in the HTTP request.
+func NewBadRequestMissingParameter(s string) *HTTPError {
+	return NewBadRequestString(`Missing parameter "` + s + `"`)
+}
+
+// NewBadRequestUnwantedParameter returns a 400 HttpError as a unnecessary
+// parameter is present in the HTTP request.
+func NewBadRequestUnwantedParameter(s string) *HTTPError {
+	return NewBadRequestString(`Unwanted parameter "` + s + `"`)
+}