Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

Sources/OpenVPN3/openvpn/crypto/hashstr.hpp

@@ -0,0 +1,95 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    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 Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef OPENVPN_CRYPTO_HASHSTR_H
+#define OPENVPN_CRYPTO_HASHSTR_H
+
+#include <string>
+
+#include <openvpn/buffer/buffer.hpp>
+#include <openvpn/common/hexstr.hpp>
+#include <openvpn/common/base64.hpp>
+#include <openvpn/crypto/digestapi.hpp>
+
+namespace openvpn {
+  class HashString
+  {
+  public:
+    HashString(DigestFactory& digest_factory,
+	       const CryptoAlgs::Type digest_type)
+      : ctx(digest_factory.new_digest(digest_type))
+    {
+    }
+
+    void update(const std::string& str)
+    {
+      ctx->update((unsigned char *)str.c_str(), str.length());
+    }
+
+    void update(const char *str)
+    {
+      ctx->update((unsigned char *)str, std::strlen(str));
+    }
+
+    void update(const char c)
+    {
+      ctx->update((unsigned char *)&c, 1);
+    }
+
+    void update(const Buffer& buf)
+    {
+      ctx->update(buf.c_data(), buf.size());
+    }
+
+    BufferPtr final()
+    {
+      BufferPtr ret(new BufferAllocated(ctx->size(), BufferAllocated::ARRAY));
+      ctx->final(ret->data());
+      return ret;
+    }
+
+    void final(Buffer& output)
+    {
+      const size_t size = ctx->size();
+      if (size > output.max_size())
+	OPENVPN_BUFFER_THROW(buffer_overflow);
+      ctx->final(output.data());
+      output.set_size(size);
+    }
+
+    std::string final_hex()
+    {
+      BufferPtr bp = final();
+      return render_hex_generic(*bp);
+    }
+
+    std::string final_base64()
+    {
+      BufferPtr bp = final();
+      return base64->encode(*bp);
+    }
+
+  private:
+    DigestInstance::Ptr ctx;
+  };
+}
+
+#endif