/*
* Certificate Store
* (C) 1999-2010,2013 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/

#include <botan/certstor.h>

#if defined(BOTAN_HAS_BOOST_FILESYSTEM)
#include <boost/filesystem.hpp>
#endif

namespace Botan {

const X509_CRL* Certificate_Store::find_crl_for(const X509_Certificate&) const
   {
   return nullptr;
   }

void Certificate_Store_In_Memory::add_certificate(const X509_Certificate& cert)
   {
   for(size_t i = 0; i != m_certs.size(); ++i)
      {
      if(m_certs[i] == cert)
         return;
      }

   m_certs.push_back(cert);
   }

std::vector<X509_DN> Certificate_Store_In_Memory::all_subjects() const
   {
   std::vector<X509_DN> subjects;
   for(size_t i = 0; i != m_certs.size(); ++i)
      subjects.push_back(m_certs[i].subject_dn());
   return subjects;
   }

namespace {

const X509_Certificate*
cert_search(const X509_DN& subject_dn, const std::vector<byte>& key_id,
            const std::vector<X509_Certificate>& certs)
   {
   for(size_t i = 0; i != certs.size(); ++i)
      {
      // Only compare key ids if set in both call and in the cert
      if(key_id.size())
         {
         std::vector<byte> skid = certs[i].subject_key_id();

         if(skid.size() && skid != key_id) // no match
            continue;
         }

      if(certs[i].subject_dn() == subject_dn)
         return &certs[i];
      }

   return nullptr;
   }

}

const X509_Certificate*
Certificate_Store_In_Memory::find_cert(const X509_DN& subject_dn,
                                       const std::vector<byte>& key_id) const
   {
   return cert_search(subject_dn, key_id, m_certs);
   }

void Certificate_Store_In_Memory::add_crl(const X509_CRL& crl)
   {
   X509_DN crl_issuer = crl.issuer_dn();

   for(size_t i = 0; i != m_crls.size(); ++i)
      {
      // Found an update of a previously existing one; replace it
      if(m_crls[i].issuer_dn() == crl_issuer)
         {
         if(m_crls[i].this_update() <= crl.this_update())
            m_crls[i] = crl;
         return;
         }
      }

   // Totally new CRL, add to the list
   m_crls.push_back(crl);
   }

const X509_CRL* Certificate_Store_In_Memory::find_crl_for(const X509_Certificate& subject) const
   {
   const std::vector<byte>& key_id = subject.authority_key_id();

   for(size_t i = 0; i != m_crls.size(); ++i)
      {
      // Only compare key ids if set in both call and in the CRL
      if(key_id.size())
         {
         std::vector<byte> akid = m_crls[i].authority_key_id();

         if(akid.size() && akid != key_id) // no match
            continue;
         }

      if(m_crls[i].issuer_dn() == subject.issuer_dn())
         return &m_crls[i];
      }

   return nullptr;
   }

Certificate_Store_In_Memory::Certificate_Store_In_Memory(const std::string& dir)
   {
   if(dir == "")
      return;

#if defined(BOTAN_HAS_BOOST_FILESYSTEM)
   boost::filesystem::recursive_directory_iterator i(dir);
   boost::filesystem::recursive_directory_iterator end;

   while(i != end)
      {
      auto path = i->path();
      ++i;

      try
         {
         if(boost::filesystem::is_regular_file(path))
            m_certs.push_back(X509_Certificate(path.string()));
         }
      catch(...) {}
      }
#else
   throw std::runtime_error("Certificate_Store_In_Memory: FS access disabled");
#endif
   }

const X509_Certificate*
Certificate_Store_Overlay::find_cert(const X509_DN& subject_dn,
                                     const std::vector<byte>& key_id) const
   {
   return cert_search(subject_dn, key_id, m_certs);
   }

std::vector<X509_DN> Certificate_Store_Overlay::all_subjects() const
   {
   std::vector<X509_DN> subjects;
   for(size_t i = 0; i != m_certs.size(); ++i)
      subjects.push_back(m_certs[i].subject_dn());
   return subjects;
   }

}