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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 21:11:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 21:11:59 +0000 |
commit | 3cd01b932e1c85394272ae64fae67ebeda92fb00 (patch) | |
tree | c5a3115d710afc1879ddea5349362a2bc651733c /ednscookies.hh | |
parent | Initial commit. (diff) | |
download | dnsdist-3cd01b932e1c85394272ae64fae67ebeda92fb00.tar.xz dnsdist-3cd01b932e1c85394272ae64fae67ebeda92fb00.zip |
Adding upstream version 1.8.3.upstream/1.8.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'ednscookies.hh')
-rw-r--r-- | ednscookies.hh | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/ednscookies.hh b/ednscookies.hh new file mode 100644 index 0000000..7eff3c6 --- /dev/null +++ b/ednscookies.hh @@ -0,0 +1,72 @@ +/* + * 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); +}; |