src/io/recordHandler.cpp

   1 #include "io/recordHandler.h"
   2
   3 #include <iostream>
   4 #include <sstream>
   5 #include <fstream>
   6 #include <ctime>
   7 #include <unordered_map>
   8
   9 #include <openssl/ssl.h>
  10
  11 #include "util.h"
  12 #include "io/record.h"
  13 #include "io/opensslBIO.h"
  14 #include "io/slipBio.h"
  15
  16 #include "db/database.h"
  17 #include "crypto/remoteSigner.h"
  18 #include "crypto/sslUtil.h"
  19 #include "crypto/simpleOpensslSigner.h"
  20
  21 #include "log/logger.hpp"
  22
  23 extern std::vector<Profile> profiles;
  24 extern std::unordered_map<std::string, std::shared_ptr<CAConfig>> CAs;
  25
  26 class RecordHandlerSession {
  27 public:
  28     uint32_t sessid = 0;
  29     uint32_t lastCommandCount = 0;
  30
  31     std::shared_ptr<TBSCertificate> tbs;
  32     std::shared_ptr<SignedCertificate> result;
  33
  34     std::shared_ptr<SSL> ssl;
  35
  36     std::shared_ptr<OpensslBIOWrapper> io;
  37     DefaultRecordHandler* parent;
  38     std::shared_ptr<Signer> signer;
  39
  40     std::unique_ptr<std::ofstream> logFile;
  41     //std::stringstream sessionlog;
  42     std::vector<std::string> serials;
  43     logger::logger_set logger;
  44
  45
  46     RecordHandlerSession( DefaultRecordHandler* parent, std::shared_ptr<Signer> signer, std::shared_ptr<SSL_CTX> ctx, std::shared_ptr<BIO> output ) :
  47         tbs( std::make_shared<TBSCertificate>() ),
  48         logFile(openLogfile( "logs/log_" + timestamp() ) ),
  49         logger{ std::cout, *logFile } {
  50         this->parent = parent;
  51         this->signer = signer;
  52
  53         ssl = std::shared_ptr<SSL>( SSL_new( ctx.get() ), SSL_free );
  54         std::shared_ptr<BIO> bio(
  55             BIO_new( BIO_f_ssl() ),
  56             [output]( BIO * p ) {
  57                 BIO_free( p );
  58             } );
  59         SSL_set_accept_state( ssl.get() );
  60         SSL_set_bio( ssl.get(), output.get(), output.get() );
  61         BIO_set_ssl( bio.get(), ssl.get(), BIO_NOCLOSE );
  62         io = std::make_shared<OpensslBIOWrapper>( bio );
  63     }
  64
  65     void respondCommand( RecordHeader::SignerResult res, std::string payload ) {
  66         RecordHeader rh;
  67         rh.command = static_cast<uint16_t>( res );
  68         rh.flags = 0;
  69         rh.command_count = 0; // TODO i++
  70         rh.totalLength = payload.size();
  71         sendCommand( rh, payload, io );
  72     }
  73
  74     void work() {
  75         std::string content = io->readLine();
  76
  77         try {
  78             RecordHeader head;
  79             std::string payload = parseCommand( head, content );
  80             execute( head, payload );
  81         } catch( const char* msg ) {
  82             logger::error( "ERROR: ", msg );
  83             parent->reset();
  84             return;
  85         }
  86     }
  87
  88     void execute( RecordHeader& head, std::string data ) {
  89         if( head.totalLength != head.payloadLength || head.offset != 0 ) {
  90             throw "Error, chunking not supported yet";
  91         }
  92
  93         switch( static_cast<RecordHeader::SignerCommand>( head.command )) {
  94         case RecordHeader::SignerCommand::SET_CSR:
  95             tbs->csr_content = data;
  96             tbs->csr_type = "CSR";
  97             logger::note( "INFO: CSR read:\n", tbs->csr_content );
  98             break;
  99
 100         case RecordHeader::SignerCommand::SET_SPKAC:
 101             tbs->csr_content = data;
 102             tbs->csr_type = "SPKAC";
 103             logger::note( "INFO: SPKAC read:\n", tbs->csr_content );
 104             break;
 105
 106         case RecordHeader::SignerCommand::SET_SIGNATURE_TYPE:
 107             tbs->md = data;
 108             break;
 109
 110         case RecordHeader::SignerCommand::SET_PROFILE:
 111             // TODO
 112             tbs->profile = data;
 113             break;
 114
 115         case RecordHeader::SignerCommand::SET_WISH_FROM:
 116             tbs->wishFrom = data;
 117             break;
 118
 119         case RecordHeader::SignerCommand::SET_WISH_TO:
 120             tbs->wishTo = data;
 121             break;
 122
 123         case RecordHeader::SignerCommand::ADD_SAN:
 124             {
 125                 size_t pos = data.find( "," );
 126
 127                 if( pos == std::string::npos ) {
 128                     // error
 129                 } else {
 130                     auto san = std::make_shared<SAN>();
 131                     san->type = data.substr( 0, pos );
 132                     san->content = data.substr( pos + 1 );
 133                     tbs->SANs.push_back( san );
 134                 }
 135             }
 136             break;
 137
 138         case RecordHeader::SignerCommand::ADD_AVA:
 139             {
 140                 size_t pos = data.find( "," );
 141
 142                 if( pos == std::string::npos ) {
 143                     // error
 144                 } else {
 145                     auto ava = std::make_shared<AVA>();
 146                     ava->name = data.substr( 0, pos );
 147                     ava->value = data.substr( pos + 1 );
 148                     tbs->AVAs.push_back( ava );
 149                 }
 150             }
 151             break;
 152
 153         case RecordHeader::SignerCommand::ADD_PROOF_LINE:
 154             break;
 155
 156         case RecordHeader::SignerCommand::SIGN:
 157             result = signer->sign( tbs );
 158             logger::note( "INFO: signlog:\n", result->log );
 159             logger::note( "INFO: res:\n", result->certificate );
 160             respondCommand( RecordHeader::SignerResult::SAVE_LOG, result->log );
 161             break;
 162
 163         case RecordHeader::SignerCommand::LOG_SAVED:
 164             if( result ) {
 165                 respondCommand( RecordHeader::SignerResult::SIGNING_CA, result->ca_name );
 166                 respondCommand( RecordHeader::SignerResult::CERTIFICATE, result->certificate );
 167             }
 168
 169             logger::note( "Shutting down SSL" );
 170             if( !SSL_shutdown( ssl.get() ) && !SSL_shutdown( ssl.get() ) ) {
 171                 logger::warn( "ERROR: SSL shutdown failed." );
 172             }
 173             io->ctrl( BIO_CTRL_FLUSH, 0, NULL );
 174             logger::note( "Shutted down SSL" );
 175
 176             parent->reset(); // Connection ended
 177
 178             break;
 179
 180         case RecordHeader::SignerCommand::ADD_SERIAL:
 181             serials.push_back( data );
 182             break;
 183
 184         case RecordHeader::SignerCommand::REVOKE:
 185             {
 186                 logger::note("Revoking: ", data);
 187                 std::string ca = data;
 188                 auto reqCA = CAs.at( ca );
 189                 logger::note( "CA found in recordHandler" );
 190                 std::shared_ptr<CRL> crl;
 191                 std::string date;
 192                 std::tie( crl, date ) = signer->revoke( reqCA, serials );
 193
 194                 respondCommand( RecordHeader::SignerResult::REVOKED, date + crl->getSignature() );
 195             }
 196             break;
 197
 198         case RecordHeader::SignerCommand::GET_FULL_CRL:
 199             {
 200                 logger::note("Requesting full CRL: ", data);
 201                 auto ca = CAs.at( data );
 202                 CRL c( ca->path + "/ca.crl" );
 203                 respondCommand( RecordHeader::SignerResult::FULL_CRL, c.toString() );
 204
 205                 logger::note( "Shutting down SSL" );
 206                 if( !SSL_shutdown( ssl.get() ) && !SSL_shutdown( ssl.get() ) ) {
 207                     logger::error( "ERROR: SSL shutdown failed." );
 208                 }
 209                 io->ctrl( BIO_CTRL_FLUSH, 0, NULL );
 210                 logger::note( "Shutted down SSL" );
 211
 212                 parent->reset(); // Connection ended
 213             }
 214             break;
 215
 216         default:
 217             throw "Unimplemented";
 218         }
 219     }
 220 };
 221
 222 DefaultRecordHandler::DefaultRecordHandler( std::shared_ptr<Signer> signer, std::shared_ptr<BIO> bio ) :
 223     bio( bio ), ctx( generateSSLContext( true ) ), signer( signer ), currentSession() {
 224 }
 225
 226 void DefaultRecordHandler::reset() {
 227     currentSession = std::shared_ptr<RecordHandlerSession>();
 228 }
 229
 230 void DefaultRecordHandler::handle() {
 231     if( !currentSession ) {
 232         (void) BIO_reset( bio.get() );
 233         logger::note( "New session allocated." );
 234         currentSession = std::make_shared<RecordHandlerSession>( this, signer, ctx, bio );
 235     }
 236     try {
 237         currentSession->work();
 238     } catch( EOFException e ){
 239         reset();
 240     }
 241 }