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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 09:34:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 09:34:30 +0000
commit4fc2f55f761d71aae1f145d5aa94ba929cc39676 (patch)
tree5c1e1db3b46dd4edbe11f612d93cb94b96891ce3 /ednscookies.hh
parentInitial commit. (diff)
downloaddnsdist-4fc2f55f761d71aae1f145d5aa94ba929cc39676.tar.xz
dnsdist-4fc2f55f761d71aae1f145d5aa94ba929cc39676.zip
Adding upstream version 1.7.3.upstream/1.7.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'ednscookies.hh')
-rw-r--r--ednscookies.hh72
1 files changed, 72 insertions, 0 deletions
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+/*
+ * This file is part of PowerDNS or dnsdist.
+ * Copyright -- PowerDNS.COM B.V. and its contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * In addition, for the avoidance of any doubt, permission is granted to
+ * link this program with OpenSSL and to (re)distribute the binaries
+ * produced as the result of such linking.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#pragma once
+#include "namespaces.hh"
+#include "iputils.hh"
+
+struct EDNSCookiesOpt
+{
+ static const size_t EDNSCookieSecretSize = 32;
+ static const size_t EDNSCookieOptSize = 24;
+
+ EDNSCookiesOpt(){};
+ EDNSCookiesOpt(const std::string& option);
+ EDNSCookiesOpt(const char* option, unsigned int len);
+
+ bool makeFromString(const std::string& option);
+ bool makeFromString(const char* option, unsigned int len);
+
+ size_t size() const
+ {
+ return server.size() + client.size();
+ }
+
+ bool isWellFormed() const
+ {
+ // RFC7873 section 5.2.2
+ // In summary, valid cookie lengths are 8 and 16 to 40 inclusive.
+ return (
+ client.size() == 8 && (server.size() == 0 || (server.size() >= 8 && server.size() <= 32)));
+ }
+
+ bool isValid(const string& secret, const ComboAddress& source) const;
+ bool makeServerCookie(const string& secret, const ComboAddress& source);
+ string makeOptString() const;
+ string getServer() const
+ {
+ return server;
+ }
+ string getClient() const
+ {
+ return client;
+ }
+
+private:
+ bool shouldRefresh() const;
+
+ // the client cookie
+ string client;
+ // the server cookie
+ string server;
+
+ void getEDNSCookiesOptFromString(const char* option, unsigned int len);
+};