utils: interface update & refactoring

7 files changed, 81 insertions, 90 deletions

diff --git a/utils/CMakeLists.txt b/utils/CMakeLists.txt
index 97ecfb6..0d57e27 100644
--- a/utils/CMakeLists.txt
+++ b/utils/CMakeLists.txt
@@ -1,11 +1,11 @@
 find_package(Boost REQUIRED COMPONENTS filesystem program_options system)
 
-add_executable(util_encrypt_block encrypt_block.cpp block_cmd_parser.hpp block_dumper.hpp data_parsers.hpp)
+add_executable(util_encrypt_block encrypt_block.cpp block_cmd_parser.hpp block_dumper.hpp block_input.hpp data_parsers.hpp)
 target_include_directories(util_encrypt_block PRIVATE ${Boost_INCLUDE_DIRS})
 target_link_libraries(util_encrypt_block libaesnixx ${Boost_LIBRARIES})
 set_target_properties(util_encrypt_block PROPERTIES OUTPUT_NAME encrypt_block)
 
-add_executable(util_decrypt_block decrypt_block.cpp block_cmd_parser.hpp block_dumper.hpp data_parsers.hpp)
+add_executable(util_decrypt_block decrypt_block.cpp block_cmd_parser.hpp block_dumper.hpp block_input.hpp data_parsers.hpp)
 target_include_directories(util_decrypt_block PRIVATE ${Boost_INCLUDE_DIRS})
 target_link_libraries(util_decrypt_block libaesnixx ${Boost_LIBRARIES})
 set_target_properties(util_decrypt_block PROPERTIES OUTPUT_NAME decrypt_block)
diff --git a/utils/README.md b/utils/README.md
index 8055d87..a1cfeb5 100644
--- a/utils/README.md
+++ b/utils/README.md
@@ -19,8 +19,8 @@ The block encryption utilities can produce verbose human-readable output,
 including round keys, intermediate initialization vector values, etc.
 This is primarily intended for debugging purposes.
 Enable verbose output by passing the `--verbose` flag to the utilities.
-Please note that verbose output can only be produced when *not* using "boxes"
-(the `--box` flag).
+Please note that verbose output can only be produced when *not* using the
+"boxes" interface (the `--use-boxes` flag).
 
 ### encrypt_block.exe
 
diff --git a/utils/block_cmd_parser.hpp b/utils/block_cmd_parser.hpp
index 988ef52..62b0f36 100644
--- a/utils/block_cmd_parser.hpp
+++ b/utils/block_cmd_parser.hpp
@@ -8,11 +8,11 @@
 
 #pragma once
 
+#include "block_input.hpp"
 #include "data_parsers.hpp"
 
 #include <aesnixx/all.hpp>
 
-#include <boost/config.hpp>
 #include <boost/filesystem.hpp>
 #include <boost/program_options.hpp>
 
@@ -25,66 +25,8 @@
 
 namespace
 {
-    BOOST_NORETURN inline void throw_iv_required()
-    {
-        throw boost::program_options::error(
-            "initialization vector is required for the selected mode of operation");
-    }
-
-    BOOST_NORETURN inline void throw_not_implemented(aesni::Algorithm algorithm)
-    {
-        throw boost::program_options::error(
-            "the selected algorithm is not implemented");
-    }
-
-    BOOST_NORETURN inline void throw_not_implemented(aesni::Mode mode)
-    {
-        throw boost::program_options::error(
-            "the selected mode of operation is not implemented");
-    }
-
     class CommandLineParser;
 
-    class Input
-    {
-    public:
-        Input(
-            std::string&& key_string,
-            std::string&& iv_string,
-            std::vector<std::string>&& input_block_strings)
-            : key_string(std::move(key_string))
-            , iv_string(std::make_pair<bool, std::string>(true, std::move(iv_string)))
-            , input_block_strings(input_block_strings)
-        { }
-
-        Input(
-            std::string&& key_string,
-            std::vector<std::string>&& input_block_strings)
-            : key_string(std::move(key_string))
-            , iv_string(std::make_pair<bool, std::string>(false, std::string()))
-            , input_block_strings(std::move(input_block_strings))
-        { }
-
-        const std::string& get_key_string() const { return key_string; }
-
-        const std::string& get_iv_string() const
-        {
-            if (!iv_string.first)
-                throw_iv_required();
-            return iv_string.second;
-        }
-
-        const std::vector<std::string>& get_input_block_strings() const
-        {
-            return input_block_strings;
-        }
-
-    private:
-        const std::string key_string;
-        const std::pair<bool, std::string> iv_string;
-        const std::vector<std::string> input_block_strings;
-    };
-
     class Settings
     {
     public:
@@ -118,7 +60,7 @@ namespace
 
             options.add_options()
                 ("help,h", "show this message and exit")
-                ("box,b", po::bool_switch(&settings.use_boxes_flag)->default_value(false), "use the \"boxes\" interface")
+                ("use-boxes,b", po::bool_switch(&settings.use_boxes_flag)->default_value(false), "use the \"boxes\" interface")
                 ("mode,m", po::value<aesni::Mode>(&settings.mode)->required(), "set mode of operation")
                 ("algorithm,a", po::value<aesni::Algorithm>(&settings.algorithm)->required(), "set algorithm")
                 ("verbose,v", po::bool_switch(&settings.verbose_flag)->default_value(false), "enable verbose output");
@@ -173,7 +115,10 @@ namespace
                 if (aesni::mode_requires_initialization_vector(settings.get_mode()))
                 {
                     if (args.empty())
-                        throw_iv_required();
+                    {
+                        throw boost::program_options::error(
+                            "an initialization vector is required for the selected mode of operation");
+                    }
                     iv_string = std::move(args.front());
                     args.pop_front();
                 }
diff --git a/utils/block_input.hpp b/utils/block_input.hpp
new file mode 100644
index 0000000..343bb2a
--- /dev/null
+++ b/utils/block_input.hpp
@@ -0,0 +1,47 @@
+/**
+ * \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 <string>
+#include <vector>
+
+namespace
+{
+    class Input
+    {
+    public:
+        Input(const std::string& key_string,
+                   const std::string& iv_string,
+                   const std::vector<std::string>& input_block_strings)
+            : key_string(key_string)
+            , iv_string(iv_string)
+            , input_block_strings(input_block_strings)
+        { }
+
+        Input(const std::string& key_string,
+                   const std::vector<std::string>& input_block_strings)
+            : key_string(key_string)
+            , input_block_strings(input_block_strings)
+        { }
+
+        const std::string& get_key_string() const { return key_string; }
+
+        const std::string& get_iv_string() const { return iv_string; }
+
+        const std::vector<std::string>& get_input_block_strings() const
+        {
+            return input_block_strings;
+        }
+
+    private:
+        const std::string key_string;
+        const std::string iv_string;
+        const std::vector<std::string> input_block_strings;
+    };
+}
diff --git a/utils/decrypt_block.cpp b/utils/decrypt_block.cpp
index a8c9625..456ef6c 100644
--- a/utils/decrypt_block.cpp
+++ b/utils/decrypt_block.cpp
@@ -8,6 +8,7 @@
 
 #include "block_cmd_parser.hpp"
 #include "block_dumper.hpp"
+#include "block_input.hpp"
 
 #include <aesnixx/all.hpp>
 
@@ -15,7 +16,7 @@
 
 #include <exception>
 #include <iostream>
-#include <iterator>
+#include <stdexcept>
 #include <string>
 
 namespace
@@ -92,7 +93,7 @@ namespace
                 break;
 
             default:
-                throw_not_implemented(mode);
+                throw std::runtime_error("the selected mode of operation is not implemented");
                 break;
         }
     }
@@ -118,7 +119,7 @@ namespace
                 break;
 
             default:
-                throw_not_implemented(algorithm);
+                throw std::runtime_error("the selected algorithm is not implemented");
                 break;
         }
     }
diff --git a/utils/encrypt_block.cpp b/utils/encrypt_block.cpp
index 724e8c1..98fdec6 100644
--- a/utils/encrypt_block.cpp
+++ b/utils/encrypt_block.cpp
@@ -8,6 +8,7 @@
 
 #include "block_cmd_parser.hpp"
 #include "block_dumper.hpp"
+#include "block_input.hpp"
 
 #include <aesnixx/all.hpp>
 
@@ -15,7 +16,7 @@
 
 #include <exception>
 #include <iostream>
-#include <iterator>
+#include <stdexcept>
 #include <string>
 
 namespace
@@ -92,7 +93,7 @@ namespace
                 break;
 
             default:
-                throw_not_implemented(mode);
+                throw std::runtime_error("the selected mode of operation is not implemented");
                 break;
         }
     }
@@ -118,7 +119,7 @@ namespace
                 break;
 
             default:
-                throw_not_implemented(algorithm);
+                throw std::runtime_error("the selected algorithm is not implemented");
                 break;
         }
     }
diff --git a/utils/file_cmd_parser.hpp b/utils/file_cmd_parser.hpp
index 7d1470d..b6312f3 100644
--- a/utils/file_cmd_parser.hpp
+++ b/utils/file_cmd_parser.hpp
@@ -26,24 +26,16 @@ namespace
     class Settings
     {
     public:
-        Settings()
-            : iv(false, std::string())
-        { }
+        Settings() = default;
 
         aesni::Mode get_mode() const { return mode; }
         aesni::Algorithm get_algorithm() const { return algorithm; }
 
-        std::string get_input_path() const { return input_path; }
-        std::string get_output_path() const { return output_path; }
+        const std::string& get_input_path() const { return input_path; }
+        const std::string& get_output_path() const { return output_path; }
 
-        std::string get_key_string() const { return key; }
-
-        std::string get_iv_string() const
-        {
-            if (!iv.first)
-                throw boost::program_options::error("initialization vector is required for the selected mode of operation");
-            return iv.second;
-        }
+        const std::string& get_key_string() const { return key; }
+        const std::string& get_iv_string() const { return iv; }
 
     private:
         aesni::Mode mode;
@@ -52,8 +44,7 @@ namespace
         std::string input_path;
         std::string output_path;
         std::string key;
-
-        std::pair<bool, std::string> iv;
+        std::string iv;
 
         friend class CommandLineParser;
     };
@@ -77,7 +68,7 @@ namespace
                 ("input-path,i", po::value<std::string>(&settings.input_path)->required(), "set input file")
                 ("output-path,o", po::value<std::string>(&settings.output_path)->required(), "set output file")
                 ("key,k", po::value<std::string>(&settings.key)->required(), "set encryption key")
-                ("iv,v", po::value<std::string>(&settings.iv.second), "set initialization vector");
+                ("iv,v", po::value<std::string>(&settings.iv), "set initialization vector");
 
             po::variables_map vm;
             po::store(po::parse_command_line(argc, argv, options), vm);
@@ -88,10 +79,16 @@ namespace
                 return;
             }
 
-            if (vm.count("iv"))
-                settings.iv.first = true;
-
             po::notify(vm);
+
+            if (aesni::mode_requires_initialization_vector(settings.get_mode()))
+            {
+                if (!vm.count("iv"))
+                {
+                    throw boost::program_options::error(
+                        "an initialization vector is required for the selected mode of operation");
+                }
+            }
         }
 
         bool exit_with_usage() const { return help_flag; }