/*************************************************
* CRL Entry Source File                          *
* (C) 1999-2008 The Botan Project                *
*************************************************/

#include <botan/crl_ent.h>
#include <botan/x509_ext.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/bigint.h>
#include <botan/config.h>
#include <botan/oids.h>
#include <botan/util.h>

namespace Botan {

/*************************************************
* Create a CRL_Entry                             *
*************************************************/
CRL_Entry::CRL_Entry()
   {
   reason = UNSPECIFIED;
   }

/*************************************************
* Create a CRL_Entry                             *
*************************************************/
CRL_Entry::CRL_Entry(const X509_Certificate& cert, CRL_Code why)
   {
   serial = cert.serial_number();
   time = X509_Time(system_time());
   reason = why;
   }

/*************************************************
* Compare two CRL_Entrys for equality            *
*************************************************/
bool operator==(const CRL_Entry& a1, const CRL_Entry& a2)
   {
   if(a1.serial_number() != a2.serial_number())
      return false;
   if(a1.expire_time() != a2.expire_time())
      return false;
   if(a1.reason_code() != a2.reason_code())
      return false;
   return true;
   }

/*************************************************
* Compare two CRL_Entrys for inequality          *
*************************************************/
bool operator!=(const CRL_Entry& a1, const CRL_Entry& a2)
   {
   return !(a1 == a2);
   }

/*************************************************
* Compare two CRL_Entrys                         *
*************************************************/
bool operator<(const CRL_Entry& a1, const CRL_Entry& a2)
   {
   return (a1.expire_time().cmp(a2.expire_time()) < 0);
   }

/*************************************************
* DER encode a CRL_Entry                         *
*************************************************/
void CRL_Entry::encode_into(DER_Encoder& der) const
   {
   Extensions extensions;

   extensions.add(new Cert_Extension::CRL_ReasonCode(reason));

   der.start_cons(SEQUENCE)
         .encode(BigInt::decode(serial, serial.size()))
         .encode(time)
         .encode(extensions)
      .end_cons();
   }

/*************************************************
* Decode a BER encoded CRL_Entry                 *
*************************************************/
void CRL_Entry::decode_from(BER_Decoder& source)
   {
   BigInt serial_number_bn;

   source.start_cons(SEQUENCE)
      .decode(serial_number_bn)
      .decode(time);

   if(source.more_items())
      {
      std::string action =
         global_config().option("x509/crl/unknown_critical");

      if(action != "throw" && action != "ignore")
         throw Invalid_Argument("Bad setting x509/crl/unknown_critical: "
                                + action);

      Extensions extensions(action == "throw");
      source.decode(extensions);
      Data_Store info;
      extensions.contents_to(info, info);
      reason = CRL_Code(info.get1_u32bit("X509v3.CRLReasonCode"));
      }

   serial = BigInt::encode(serial_number_bn);
   }

}