Initial QSfera import

Server/vendor/github.com/libregraph/lico/utils/trusted.go

@@ -0,0 +1,48 @@
+/*
+ * 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 utils
+
+import (
+	"net"
+	"net/http"
+)
+
+// IsRequestFromTrustedSource checks if the provided requests remote address is
+// one either one of the provided ips or in one of the provided networks.
+func IsRequestFromTrustedSource(req *http.Request, ips []*net.IP, nets []*net.IPNet) (bool, error) {
+	ipString, _, err := net.SplitHostPort(req.RemoteAddr)
+	if err != nil {
+		return false, err
+	}
+
+	ip := net.ParseIP(ipString)
+
+	for _, checkIP := range ips {
+		if checkIP.Equal(ip) {
+			return true, nil
+		}
+	}
+
+	for _, checkNet := range nets {
+		if checkNet.Contains(ip) {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}