1 files changed, 59 insertions, 0 deletions
diff --git a/aesxx/utils/data_parsers.hpp b/aesxx/utils/data_parsers.hpp
new file mode 100644
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--- /dev/null
+++ b/aesxx/utils/data_parsers.hpp
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+// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+// This file is part of the "AES tools" project.
+// For details, see https://github.com/egor-tensin/aes-tools.
+// Distributed under the MIT License.
+
+#pragma once
+
+#include <aesxx/all.hpp>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/program_options.hpp>
+
+#include <istream>
+#include <string>
+#include <unordered_map>
+
+inline std::istream& operator>>(std::istream& is, aes::Mode& dest)
+{
+    std::string src;
+    is >> src;
+
+    static const std::unordered_map<std::string, aes::Mode> lookup_table =
+    {
+        {"ecb", AES_ECB},
+        {"cbc", AES_CBC},
+        {"cfb", AES_CFB},
+        {"ofb", AES_OFB},
+        {"ctr", AES_CTR},
+    };
+
+    const auto it = lookup_table.find(boost::algorithm::to_lower_copy(src));
+
+    if (it == lookup_table.cend())
+        throw boost::program_options::invalid_option_value(src);
+
+    dest = it->second;
+    return is;
+}
+
+inline std::istream& operator>>(std::istream& is, aes::Algorithm& dest)
+{
+    std::string src;
+    is >> src;
+
+    static const std::unordered_map<std::string, aes::Algorithm> lookup_table =
+    {
+        {"aes128", AES_AES128},
+        {"aes192", AES_AES192},
+        {"aes256", AES_AES256},
+    };
+
+    const auto it = lookup_table.find(boost::algorithm::to_lower_copy(src));
+
+    if (it == lookup_table.cend())
+        throw boost::program_options::invalid_option_value(src);
+
+    dest = it->second;
+    return is;
+}