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/*
* X.509 Time Types
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/asn1_time.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/charset.h>
#include <botan/parsing.h>
#include <botan/calendar.h>
#include <sstream>
#include <iomanip>
namespace Botan {
X509_Time::X509_Time(const std::chrono::system_clock::time_point& time)
{
calendar_point cal = calendar_value(time);
m_year = cal.year;
m_month = cal.month;
m_day = cal.day;
m_hour = cal.hour;
m_minute = cal.minutes;
m_second = cal.seconds;
m_tag = (m_year >= 2050) ? GENERALIZED_TIME : UTC_TIME;
}
X509_Time::X509_Time(const std::string& t_spec, ASN1_Tag tag)
{
set_to(t_spec, tag);
}
void X509_Time::encode_into(DER_Encoder& der) const
{
if(m_tag != GENERALIZED_TIME && m_tag != UTC_TIME)
throw Invalid_Argument("X509_Time: Bad encoding tag");
der.add_object(m_tag, UNIVERSAL,
Charset::transcode(to_string(),
LOCAL_CHARSET,
LATIN1_CHARSET));
}
void X509_Time::decode_from(BER_Decoder& source)
{
BER_Object ber_time = source.get_next_object();
set_to(Charset::transcode(ASN1::to_string(ber_time),
LATIN1_CHARSET,
LOCAL_CHARSET),
ber_time.type_tag);
}
std::string X509_Time::to_string() const
{
if(time_is_set() == false)
throw Invalid_State("X509_Time::as_string: No time set");
u32bit full_year = m_year;
if(m_tag == UTC_TIME)
{
if(m_year < 1950 || m_year >= 2050)
throw Encoding_Error("X509_Time: The time " + readable_string() +
" cannot be encoded as a UTCTime");
full_year = (m_year >= 2000) ? (m_year - 2000) : (m_year - 1900);
}
const auto factor_y = uint64_t{10000000000ull}; // literal exceeds 32bit int range
const auto factor_m = uint64_t{100000000ull};
const auto factor_d = uint64_t{1000000ull};
const auto factor_h = uint64_t{10000ull};
const auto factor_i = uint64_t{100ull};
std::string repr = std::to_string(factor_y * full_year +
factor_m * m_month +
factor_d * m_day +
factor_h * m_hour +
factor_i * m_minute +
m_second) + "Z";
u32bit desired_size = (m_tag == UTC_TIME) ? 13 : 15;
while(repr.size() < desired_size)
repr = "0" + repr;
return repr;
}
std::string X509_Time::readable_string() const
{
if(time_is_set() == false)
throw Invalid_State("X509_Time::readable_string: No time set");
// desired format: "%04d/%02d/%02d %02d:%02d:%02d UTC"
std::stringstream output;
{
using namespace std;
output << setfill('0')
<< setw(4) << m_year << "/" << setw(2) << m_month << "/" << setw(2) << m_day
<< " "
<< setw(2) << m_hour << ":" << setw(2) << m_minute << ":" << setw(2) << m_second
<< " UTC";
}
return output.str();
}
bool X509_Time::time_is_set() const
{
return (m_year != 0);
}
s32bit X509_Time::cmp(const X509_Time& other) const
{
if(time_is_set() == false)
throw Invalid_State("X509_Time::cmp: No time set");
const s32bit EARLIER = -1, LATER = 1, SAME_TIME = 0;
if(m_year < other.m_year) return EARLIER;
if(m_year > other.m_year) return LATER;
if(m_month < other.m_month) return EARLIER;
if(m_month > other.m_month) return LATER;
if(m_day < other.m_day) return EARLIER;
if(m_day > other.m_day) return LATER;
if(m_hour < other.m_hour) return EARLIER;
if(m_hour > other.m_hour) return LATER;
if(m_minute < other.m_minute) return EARLIER;
if(m_minute > other.m_minute) return LATER;
if(m_second < other.m_second) return EARLIER;
if(m_second > other.m_second) return LATER;
return SAME_TIME;
}
void X509_Time::set_to(const std::string& t_spec, ASN1_Tag spec_tag)
{
if(spec_tag == GENERALIZED_TIME)
{
if(t_spec.size() != 13 && t_spec.size() != 15)
throw Invalid_Argument("Invalid GeneralizedTime string: '" + t_spec + "'");
}
else if(spec_tag == UTC_TIME)
{
if(t_spec.size() != 11 && t_spec.size() != 13)
throw Invalid_Argument("Invalid UTCTime string: '" + t_spec + "'");
}
else
{
throw Invalid_Argument("Invalid time tag " + std::to_string(spec_tag) + " val " + t_spec);
}
if(t_spec[t_spec.size()-1] != 'Z')
throw Invalid_Argument("Invalid time encoding: " + t_spec);
const size_t YEAR_SIZE = (spec_tag == UTC_TIME) ? 2 : 4;
std::vector<std::string> params;
std::string current;
for(size_t j = 0; j != YEAR_SIZE; ++j)
current += t_spec[j];
params.push_back(current);
current.clear();
for(size_t j = YEAR_SIZE; j != t_spec.size() - 1; ++j)
{
current += t_spec[j];
if(current.size() == 2)
{
params.push_back(current);
current.clear();
}
}
m_year = to_u32bit(params[0]);
m_month = to_u32bit(params[1]);
m_day = to_u32bit(params[2]);
m_hour = to_u32bit(params[3]);
m_minute = to_u32bit(params[4]);
m_second = (params.size() == 6) ? to_u32bit(params[5]) : 0;
m_tag = spec_tag;
if(spec_tag == UTC_TIME)
{
if(m_year >= 50) m_year += 1900;
else m_year += 2000;
}
if(!passes_sanity_check())
throw Invalid_Argument("Time did not pass sanity check: " + t_spec);
}
/*
* Do a general sanity check on the time
*/
bool X509_Time::passes_sanity_check() const
{
if(m_year < 1950 || m_year > 2100)
return false;
if(m_month == 0 || m_month > 12)
return false;
if(m_day == 0 || m_day > 31)
return false;
if(m_hour >= 24 || m_minute > 60 || m_second > 60)
return false;
return true;
}
/*
* Compare two X509_Times for in various ways
*/
bool operator==(const X509_Time& t1, const X509_Time& t2)
{ return (t1.cmp(t2) == 0); }
bool operator!=(const X509_Time& t1, const X509_Time& t2)
{ return (t1.cmp(t2) != 0); }
bool operator<=(const X509_Time& t1, const X509_Time& t2)
{ return (t1.cmp(t2) <= 0); }
bool operator>=(const X509_Time& t1, const X509_Time& t2)
{ return (t1.cmp(t2) >= 0); }
bool operator<(const X509_Time& t1, const X509_Time& t2)
{ return (t1.cmp(t2) < 0); }
bool operator>(const X509_Time& t1, const X509_Time& t2)
{ return (t1.cmp(t2) > 0); }
}
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