Add basic authentication without dependencies

This adds a rudimentary basic auth scheme without including dependencies.

utils/basic_auth_test.go

@@ -0,0 +1,47 @@
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+package utils
+
+import "testing"
+
+func TestVerifyCredential(t *testing.T) {
+	var hashedPasswords = map[string]string{
+		"1234": "MTIzNA==",
+		"bar":  "YmFy",
+	}
+
+	var verifyCredentialTests = []struct {
+		username string
+		password string
+		userList map[string]string
+		result   bool
+	}{
+		{"test", "1234", map[string]string{"test": hashedPasswords["1234"]}, true},
+		{"test", "0000", map[string]string{"test": hashedPasswords["1234"]}, false},
+		{"foo", "bar", map[string]string{"test": "1234", "foo": hashedPasswords["bar"]}, true},
+		{"foo", "1234", map[string]string{"test": "1234", "foo": hashedPasswords["bar"]}, false},
+		{"none", "1234", map[string]string{"test": "1234", "foo": hashedPasswords["bar"]}, false},
+	}
+
+	for _, tt := range verifyCredentialTests {
+		r := verifyCredential(tt.username, tt.password, tt.userList)
+		if r != tt.result {
+			t.Errorf("verifyCredential(%s, %s, %v) => %t, want %t", tt.username, tt.password, tt.userList, r, tt.result)
+		}
+	}
+}