1 files changed, 78 insertions, 0 deletions
diff --git a/sodcrypto.hh b/sodcrypto.hh
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--- /dev/null
+++ b/sodcrypto.hh
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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 "config.h"
+#include <string>
+#include <stdint.h>
+
+#include <arpa/inet.h>
+
+#ifndef HAVE_LIBSODIUM
+struct SodiumNonce
+{
+  void init(){};
+  void merge(const SodiumNonce& lower, const SodiumNonce& higher) {};
+  void increment(){};
+  unsigned char value[1]{0};
+};
+#else
+#include <sodium.h>
+
+struct SodiumNonce
+{
+  SodiumNonce()
+  {
+    memset(&value, 0, sizeof(value));
+  }
+
+  void init()
+  {
+    randombytes_buf(value, sizeof value);
+  }
+
+  void merge(const SodiumNonce& lower, const SodiumNonce& higher)
+  {
+    static const size_t halfSize = (sizeof value) / 2;
+    memcpy(value, lower.value, halfSize);
+    memcpy(value + halfSize, higher.value + halfSize, halfSize);
+  }
+
+  void increment()
+  {
+    uint32_t* p = (uint32_t*)value;
+    uint32_t count=htonl(*p);
+    *p=ntohl(++count);
+  }
+
+  string toString() const
+  {
+    return string((const char*)value, crypto_secretbox_NONCEBYTES);
+  }
+
+  unsigned char value[crypto_secretbox_NONCEBYTES];
+};
+#endif
+std::string newKeypair();
+std::string sodEncryptSym(const std::string& msg, const std::string& key, SodiumNonce&);
+std::string sodDecryptSym(const std::string& msg, const std::string& key, SodiumNonce&);
+std::string newKey();
+bool sodIsValidKey(const std::string& key);