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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_ASN1)
#include <botan/asn1_print.h>
#include <botan/data_src.h>
#if defined(BOTAN_HAS_PEM_CODEC)
#include <botan/pem.h>
#endif
namespace Botan_CLI {
class ASN1_Printer final : public Command
{
public:
ASN1_Printer() : Command("asn1print --skip-context-specific --print-limit=4096 --bin-limit=2048 --max-depth=64 --pem file") {}
std::string group() const override
{
return "codec";
}
std::string description() const override
{
return "Decode and print file with ASN.1 Basic Encoding Rules (BER)";
}
bool first_n(const std::vector<uint8_t>& data, size_t n, uint8_t b)
{
if(data.size() < n)
return false;
for(size_t i = 0; i != n; ++i)
if(data[i] != b)
return false;
return true;
}
void go() override
{
const std::string input = get_arg("file");
const size_t print_limit = get_arg_sz("print-limit");
const size_t bin_limit = get_arg_sz("bin-limit");
const bool print_context_specific = flag_set("skip-context-specific") == false;
const size_t max_depth = get_arg_sz("max-depth");
const size_t value_column = 60;
const size_t initial_level = 0;
std::vector<uint8_t> file_contents = slurp_file(input);
std::vector<uint8_t> data;
if(flag_set("pem") ||
(input.size() > 4 && input.substr(input.size() - 4) == ".pem") ||
(file_contents.size() > 20 && first_n(file_contents, 5, '-')))
{
#if defined(BOTAN_HAS_PEM_CODEC)
std::string pem_label;
Botan::DataSource_Memory src(file_contents);
data = unlock(Botan::PEM_Code::decode(src, pem_label));
#else
throw CLI_Error_Unsupported("PEM decoding not available in this build");
#endif
}
else
{
data.swap(file_contents);
}
Botan::ASN1_Pretty_Printer printer(print_limit, bin_limit, print_context_specific,
initial_level, value_column, max_depth);
printer.print_to_stream(output(), data.data(), data.size());
}
};
BOTAN_REGISTER_COMMAND("asn1print", ASN1_Printer);
}
#endif // BOTAN_HAS_ASN1 && BOTAN_HAS_PEM_CODEC
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