Initial QSfera import

Server/vendor/github.com/libregraph/lico/oidc/errors.go

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2017-2019 Kopano and its licensors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package oidc
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/libregraph/lico/utils"
+)
+
+// OAuth2Error defines a general OAuth2 error with id and decription.
+type OAuth2Error struct {
+	ErrorID          string `json:"error"`
+	ErrorDescription string `json:"error_description"`
+}
+
+// Error implements the error interface.
+func (err *OAuth2Error) Error() string {
+	return err.ErrorID
+}
+
+// Description implements the ErrorWithDescription interface.
+func (err *OAuth2Error) Description() string {
+	return err.ErrorDescription
+}
+
+// NewOAuth2Error creates a new error with id and description.
+func NewOAuth2Error(id string, description string) utils.ErrorWithDescription {
+	return &OAuth2Error{id, description}
+}
+
+// WriteWWWAuthenticateError writes the provided error with the provided
+// http status code to the provided http response writer as a
+// WWW-Authenticate header with comma separated fields for id and
+// description.
+func WriteWWWAuthenticateError(rw http.ResponseWriter, code int, err error) {
+	if code == 0 {
+		code = http.StatusUnauthorized
+	}
+
+	var description string
+	switch err.(type) {
+	case utils.ErrorWithDescription:
+		description = err.(utils.ErrorWithDescription).Description()
+	default:
+	}
+
+	rw.Header().Set("WWW-Authenticate", fmt.Sprintf("error=\"%s\", error_description=\"%s\"", err.Error(), description))
+	rw.WriteHeader(code)
+}
+
+// IsErrorWithID returns true if the given error is an OAuth2Error error with
+// the given ID.
+func IsErrorWithID(err error, id string) bool {
+	if err == nil {
+		return false
+	}
+
+	oauth2Error, ok := err.(*OAuth2Error)
+	if !ok {
+		return false
+	}
+
+	return oauth2Error.ErrorID == id
+}