blob: beea45d5e89c920279ff0530da14f2452ca24d85 [file] [log] [blame]
/**
* Copyright (C) 2013 Regents of the University of California.
* @author: Jeff Thompson <jefft0@remap.ucla.edu>
* @author: Yingdi Yu <yingdi@cs.ucla.edu>
* @author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
* See COPYING for copyright and distribution information.
*/
#include "asn_ext.hpp"
#include "../../util/time.hpp"
#include <boost/format.hpp>
#include <boost/lexical_cast.hpp>
using namespace CryptoPP;
namespace ndn {
size_t
DEREncodeGeneralTime(CryptoPP::BufferedTransformation &bt, MillisecondsSince1970 time)
{
if (time < 0)
throw Asn::Error("Calendar time value out of range");
else if (time > 2e14)
// 2e14 is about the year 8300. We don't want to go over a 4-digit year.
throw Asn::Error("Calendar time value out of range");
boost::posix_time::ptime boostTime =
UNIX_EPOCH_TIME + boost::posix_time::milliseconds(time);
const boost::format f = boost::format("%04d%02d%02d%02d%02d%02dZ")
% boostTime.date().year_month_day().year
% boostTime.date().year_month_day().month.as_number()
% boostTime.date().year_month_day().day.as_number()
% boostTime.time_of_day().hours()
% boostTime.time_of_day().minutes()
% boostTime.time_of_day().seconds()
;
std::string asn1time = f.str();
bt.Put(GENERALIZED_TIME);
size_t lengthBytes = DERLengthEncode(bt, asn1time.size());
bt.Put(reinterpret_cast<const uint8_t*>(asn1time.c_str()), asn1time.size());
return 1+lengthBytes+asn1time.size();
}
void
BERDecodeTime(CryptoPP::BufferedTransformation &bt, MillisecondsSince1970 &time)
{
byte b;
if (!bt.Get(b) || (b != GENERALIZED_TIME && b != UTC_TIME))
BERDecodeError();
size_t bc;
if (!BERLengthDecode(bt, bc))
BERDecodeError();
SecByteBlock time_str(bc);
if (bc != bt.Get(time_str, bc))
BERDecodeError();
std::string str;
str.assign (time_str.begin(), time_str.end());
if (b == UTC_TIME) {
if (boost::lexical_cast<int>(str.substr(0,2)) < 50)
str = "20" + str;
else
str = "19" + str;
}
time = fromIsoString(str.substr(0, 8) + "T" + str.substr(8, 6));
}
} // namespace ndn