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/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "cli.h"
#if defined(BOTAN_HAS_COMPRESSION)
#include <botan/compression.h>
#include <fstream>
#endif
namespace Botan_CLI {
#if defined(BOTAN_HAS_COMPRESSION)
class Compress final : public Command
{
public:
Compress() : Command("compress --type=gzip --level=6 --buf-size=8192 file") {}
std::string output_filename(const std::string& input_fsname, const std::string& comp_type)
{
const std::map<std::string, std::string> suffixes =
{
{ "zlib", "zlib" },
{ "gzip", "gz" },
{ "bzip2", "bz2" },
{ "lzma", "xz" },
};
auto suffix_info = suffixes.find(comp_type);
if(suffixes.count(comp_type) == 0)
{
throw CLI_Error_Unsupported("Compressing", comp_type);
}
return input_fsname + "." + suffix_info->second;
}
std::string group() const override
{
return "compression";
}
std::string description() const override
{
return "Compress a given file";
}
void go() override
{
const std::string comp_type = get_arg("type");
const size_t buf_size = get_arg_sz("buf-size");
const size_t comp_level = get_arg_sz("level");
std::unique_ptr<Botan::Compression_Algorithm> compress;
compress.reset(Botan::make_compressor(comp_type));
if(!compress)
{
throw CLI_Error_Unsupported("Compression", comp_type);
}
const std::string in_file = get_arg("file");
std::ifstream in(in_file, std::ios::binary);
if(!in.good())
{
throw CLI_IO_Error("reading", in_file);
}
const std::string out_file = output_filename(in_file, comp_type);
std::ofstream out(out_file, std::ios::binary);
if(!out.good())
{
throw CLI_IO_Error("writing", out_file);
}
Botan::secure_vector<uint8_t> buf;
compress->start(comp_level);
while(in.good())
{
buf.resize(buf_size);
in.read(reinterpret_cast<char*>(buf.data()), buf.size());
buf.resize(in.gcount());
compress->update(buf);
out.write(reinterpret_cast<const char*>(buf.data()), buf.size());
}
buf.clear();
compress->finish(buf);
out.write(reinterpret_cast<const char*>(buf.data()), buf.size());
out.close();
}
};
BOTAN_REGISTER_COMMAND("compress", Compress);
class Decompress final : public Command
{
public:
Decompress() : Command("decompress --buf-size=8192 file") {}
void parse_extension(const std::string& in_file,
std::string& out_file,
std::string& suffix)
{
auto last_dot = in_file.find_last_of('.');
if(last_dot == std::string::npos || last_dot == 0)
{
throw CLI_Error("No extension detected in filename '" + in_file + "'");
}
out_file = in_file.substr(0, last_dot);
suffix = in_file.substr(last_dot + 1, std::string::npos);
}
std::string group() const override
{
return "compression";
}
std::string description() const override
{
return "Decompress a given compressed archive";
}
void go() override
{
const size_t buf_size = get_arg_sz("buf-size");
const std::string in_file = get_arg("file");
std::string out_file, suffix;
parse_extension(in_file, out_file, suffix);
std::ifstream in(in_file, std::ios::binary);
if(!in.good())
{
throw CLI_IO_Error("reading", in_file);
}
std::unique_ptr<Botan::Decompression_Algorithm> decompress;
decompress.reset(Botan::make_decompressor(suffix));
if(!decompress)
{
throw CLI_Error_Unsupported("Decompression", suffix);
}
std::ofstream out(out_file, std::ios::binary);
if(!out.good())
{
throw CLI_IO_Error("writing", out_file);
}
Botan::secure_vector<uint8_t> buf;
decompress->start();
while(in.good())
{
buf.resize(buf_size);
in.read(reinterpret_cast<char*>(buf.data()), buf.size());
buf.resize(in.gcount());
decompress->update(buf);
out.write(reinterpret_cast<const char*>(buf.data()), buf.size());
}
buf.clear();
decompress->finish(buf);
out.write(reinterpret_cast<const char*>(buf.data()), buf.size());
out.close();
}
};
BOTAN_REGISTER_COMMAND("decompress", Decompress);
#endif
}
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