blob: 7a8eda157ccb97b0aa4459058bfa8375e9332f6d [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 <ndn-cpp-dev/ndn-cpp-config.h>
#include "asn_ext.hpp"
#if NDN_CPP_HAVE_TIME_H
#include <time.h>
#endif
#if NDN_CPP_HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#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");
time_t secondsSince1970 = time / 1000;
struct tm* gmt = gmtime(&secondsSince1970);
std::string asn1time ((boost::format("%04d%02d%02d%02d%02d%02dZ")
% (1900 + gmt->tm_year)
% (gmt->tm_mon + 1)
% gmt->tm_mday
% gmt->tm_hour
% gmt->tm_min
% gmt->tm_sec).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