1 files changed, 132 insertions, 0 deletions
diff --git a/utils/file_common.hpp b/utils/file_common.hpp
new file mode 100644
index 0000000..8a13b48
--- /dev/null
+++ b/utils/file_common.hpp
@@ -0,0 +1,132 @@
+/**
+ * \file
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#pragma once
+
+#include <aesnixx/all.hpp>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/program_options.hpp>
+
+#include <deque>
+#include <iostream>
+#include <iterator>
+#include <istream>
+#include <string>
+#include <vector>
+
+static std::istream& operator>>(std::istream& is, aesni::Mode& dest)
+{
+    std::string src;
+    is >> src;
+
+    if (boost::iequals(src, "ecb"))
+        dest = AESNI_ECB;
+    else if (boost::iequals(src, "cbc"))
+        dest = AESNI_CBC;
+    else if (boost::iequals(src, "cfb"))
+        dest = AESNI_CFB;
+    else if (boost::iequals(src, "ofb"))
+        dest = AESNI_OFB;
+    else if (boost::iequals(src, "ctr"))
+        dest = AESNI_CTR;
+    else
+        throw boost::program_options::validation_error(boost::program_options::validation_error::invalid_option_value, "mode", src);
+
+    return is;
+}
+
+static std::istream& operator>>(std::istream& is, aesni::Algorithm& dest)
+{
+    std::string src;
+    is >> src;
+
+    if (boost::iequals(src, "aes128"))
+        dest = AESNI_AES128;
+    else if (boost::iequals(src, "aes192"))
+        dest = AESNI_AES192;
+    else if (boost::iequals(src, "aes256"))
+        dest = AESNI_AES256;
+    else
+        throw boost::program_options::validation_error(boost::program_options::validation_error::invalid_option_value, "algorithm", src);
+
+    return is;
+}
+
+namespace
+{
+    class CommandLineParser
+    {
+    public:
+        CommandLineParser(const std::string& prog_name)
+            : prog_name(prog_name)
+            , options("Options")
+        { }
+
+        bool parse_options(int argc, char** argv)
+        {
+            namespace po = boost::program_options;
+
+            options.add_options()
+                ("help,h", "show this message and exit")
+                ("mode,m", po::value<aesni::Mode>(&encryption_mode)->required(), "set mode of operation")
+                ("algorithm,a", po::value<aesni::Algorithm>(&encryption_algo)->required(), "set algorithm");
+
+            po::options_description hidden_options;
+            hidden_options.add_options()
+                ("positional", po::value<std::vector<std::string>>(&args));
+
+            po::options_description all_options;
+            all_options.add(options).add(hidden_options);
+
+            po::positional_options_description positional_options;
+            positional_options.add("positional", -1);
+
+            po::variables_map vm;
+            po::store(po::command_line_parser(argc, argv).options(all_options).positional(positional_options).run(), vm);
+
+            if (vm.count("help"))
+            {
+                print_usage();
+                return false;
+            }
+
+            po::notify(vm);
+            return true;
+        }
+
+        void print_usage()
+        {
+            std::cout << "Usage: " << prog_name << " [OPTIONS...] KEY [IV] SRC_PATH DEST_PATH\n";
+            std::cout << options << "\n";
+        }
+
+        aesni::Mode get_mode() const
+        {
+            return encryption_mode;
+        }
+
+        aesni::Algorithm get_algorithm() const
+        {
+            return encryption_algo;
+        }
+
+        std::deque<std::string> get_args()
+        {
+            return { std::make_move_iterator(args.begin()), std::make_move_iterator(args.end()) };
+        }
+
+    private:
+        const std::string prog_name;
+        boost::program_options::options_description options;
+
+        aesni::Mode encryption_mode;
+        aesni::Algorithm encryption_algo;
+        std::vector<std::string> args;
+    };
+}