src/io/recordHandler.cpp

   1 #include "io/recordHandler.h"
   2
   3 #include <iostream>
   4 #include <fstream>
   5 #include <ctime>
   6 #include <unordered_map>
   7
   8 #include <openssl/ssl.h>
   9
  10 #include "io/record.h"
  11 #include "io/opensslBIO.h"
  12 #include "io/slipBio.h"
  13
  14 #include "db/database.h"
  15 #include "crypto/remoteSigner.h"
  16 #include "crypto/sslUtil.h"
  17
  18 #include "crypto/simpleOpensslSigner.h"
  19
  20 extern std::vector<Profile> profiles;
  21 extern std::unordered_map<std::string, std::shared_ptr<CAConfig>> CAs;
  22
  23 class RecordHandlerSession {
  24 public:
  25     uint32_t sessid;
  26     uint32_t lastCommandCount;
  27
  28     std::shared_ptr<TBSCertificate> tbs;
  29     std::shared_ptr<SignedCertificate> result;
  30
  31     std::shared_ptr<SSL> ssl;
  32
  33     std::shared_ptr<OpensslBIOWrapper> io;
  34     DefaultRecordHandler* parent;
  35     std::shared_ptr<Signer> signer;
  36
  37     std::shared_ptr<std::ofstream> log;
  38     std::vector<std::string> serials;
  39
  40     RecordHandlerSession( DefaultRecordHandler* parent, std::shared_ptr<Signer> signer, std::shared_ptr<SSL_CTX> ctx, std::shared_ptr<BIO> output ) :
  41         tbs( new TBSCertificate() ) {
  42         this->parent = parent;
  43         this->signer = signer;
  44         time_t c_time;
  45
  46         if( time( &c_time ) == -1 ) {
  47             throw "Error while fetching time?";
  48         }
  49
  50         log = std::shared_ptr<std::ofstream>(
  51             new std::ofstream( std::string( "logs/log_" ) + std::to_string( c_time ) ),
  52             []( std::ofstream * ptr ) {
  53                 ptr->close();
  54                 delete ptr;
  55             } );
  56
  57         ssl = std::shared_ptr<SSL>( SSL_new( ctx.get() ), SSL_free );
  58         std::shared_ptr<BIO> bio(
  59             BIO_new( BIO_f_ssl() ),
  60             [output]( BIO * p ) {
  61                 BIO_free( p );
  62             } );
  63         SSL_set_accept_state( ssl.get() );
  64         SSL_set_bio( ssl.get(), output.get(), output.get() );
  65         BIO_set_ssl( bio.get(), ssl.get(), BIO_NOCLOSE );
  66         io = std::shared_ptr<OpensslBIOWrapper>( new OpensslBIOWrapper( bio ) );
  67     }
  68
  69     void respondCommand( RecordHeader::SignerResult res, std::string payload ) {
  70         RecordHeader rh;
  71         rh.command = ( uint16_t ) res;
  72         rh.flags = 0;
  73         rh.command_count = 0; // TODO i++
  74         rh.totalLength = payload.size();
  75         sendCommand( rh, payload, io, log );
  76     }
  77
  78     void work() {
  79         std::vector<char> buffer( 2048, 0 );
  80         int res = io->read( buffer.data(), buffer.capacity() );
  81
  82         if( res <= 0 ) {
  83             ( *log ) << "Stream error, resetting SSL" << std::endl;
  84             parent->reset();
  85             return;
  86         }
  87
  88         std::string content( buffer.data(), res );
  89
  90         try {
  91             RecordHeader head;
  92             std::string payload = parseCommand( head, content, log );
  93             execute( head, payload );
  94         } catch( const char* msg ) {
  95             if( log ) {
  96                 ( *log ) << "ERROR: " << msg << std::endl;
  97             }
  98
  99             parent->reset();
 100             return;
 101         }
 102     }
 103
 104     void execute( RecordHeader& head, std::string data ) {
 105         if( head.totalLength != head.payloadLength || head.offset != 0 ) {
 106             throw "Error, chunking not supported yet";
 107         }
 108
 109         switch( ( RecordHeader::SignerCommand ) head.command ) {
 110         case RecordHeader::SignerCommand::SET_CSR:
 111             tbs->csr_content = data;
 112             tbs->csr_type = "CSR";
 113             ( *log ) << "INFO: CSR read:" << std::endl << tbs->csr_content;
 114             break;
 115
 116         case RecordHeader::SignerCommand::SET_SPKAC:
 117             tbs->csr_content = data;
 118             tbs->csr_type = "SPKAC";
 119             ( *log ) << "INFO: SPKAC read:" << std::endl << tbs->csr_content;
 120             break;
 121
 122         case RecordHeader::SignerCommand::SET_SIGNATURE_TYPE:
 123             tbs->md = data;
 124             break;
 125
 126         case RecordHeader::SignerCommand::SET_PROFILE:
 127             // TODO
 128             tbs->profile = data;
 129             break;
 130
 131         case RecordHeader::SignerCommand::ADD_SAN: {
 132             size_t pos = data.find( "," );
 133
 134             if( pos == std::string::npos ) {
 135                 // error
 136             } else {
 137                 std::shared_ptr<SAN> san( new SAN() );
 138                 san->type = data.substr( 0, pos );
 139                 san->content = data.substr( pos + 1 );
 140                 tbs->SANs.push_back( san );
 141             }
 142         }
 143         break;
 144
 145         case RecordHeader::SignerCommand::ADD_AVA: {
 146             size_t pos = data.find( "," );
 147
 148             if( pos == std::string::npos ) {
 149                 // error
 150             } else {
 151                 std::shared_ptr<AVA> ava( new AVA() );
 152                 ava->name = data.substr( 0, pos );
 153                 ava->value = data.substr( pos + 1 );
 154                 tbs->AVAs.push_back( ava );
 155             }
 156         }
 157         break;
 158
 159         case RecordHeader::SignerCommand::ADD_PROOF_LINE:
 160             break;
 161
 162         case RecordHeader::SignerCommand::SIGN:
 163             result = signer->sign( tbs );
 164             ( *log ) << "INFO: signlog: " << result->log << std::endl;
 165             ( *log ) << "INFO: res: " << result->certificate << std::endl;
 166             respondCommand( RecordHeader::SignerResult::SAVE_LOG, result->log );
 167             break;
 168
 169         case RecordHeader::SignerCommand::LOG_SAVED:
 170             if( result ) {
 171                 respondCommand( RecordHeader::SignerResult::SIGNING_CA, result->ca_name );
 172                 respondCommand( RecordHeader::SignerResult::CERTIFICATE, result->certificate );
 173             }
 174
 175             if( !SSL_shutdown( ssl.get() ) && !SSL_shutdown( ssl.get() ) ) {
 176                 ( *log ) << "ERROR: SSL close failed" << std::endl;
 177             }
 178
 179             break;
 180
 181         case RecordHeader::SignerCommand::ADD_SERIAL:
 182             serials.push_back( data );
 183             break;
 184
 185         case RecordHeader::SignerCommand::REVOKE: {
 186             std::string ca = data;
 187             auto reqCA = CAs.at( ca );
 188             ( *log ) << "CA found" << std::endl;
 189             std::shared_ptr<CRL> crl;
 190             std::string date;
 191             std::tie<std::shared_ptr<CRL>, std::string>( crl, date ) = signer->revoke( reqCA, serials );
 192
 193             respondCommand( RecordHeader::SignerResult::REVOKED, date + crl->getSignature() );
 194
 195             break;
 196         }
 197
 198         case RecordHeader::SignerCommand::GET_FULL_CRL: {
 199             auto ca = CAs.at( data );
 200             CRL c( ca->path + "/ca.crl" );
 201             respondCommand( RecordHeader::SignerResult::FULL_CRL, c.toString() );
 202
 203             if( !SSL_shutdown( ssl.get() ) && !SSL_shutdown( ssl.get() ) ) {
 204                 ( *log ) << "ERROR: SSL close failed" << std::endl;
 205             }
 206
 207             break;
 208         }
 209
 210         default:
 211             throw "Unimplemented";
 212         }
 213     }
 214 };
 215
 216 DefaultRecordHandler::DefaultRecordHandler( std::shared_ptr<Signer> signer, std::shared_ptr<BIO> bio ) :
 217     currentSession() {
 218
 219     this->signer = signer;
 220
 221     ctx = generateSSLContext( true );
 222
 223     this->bio = bio;
 224 }
 225
 226 void DefaultRecordHandler::reset() {
 227     currentSession = std::shared_ptr<RecordHandlerSession>();
 228 }
 229
 230 void DefaultRecordHandler::handle() {
 231     if( !currentSession ) {
 232         std::cout << "session allocated" << std::endl;
 233         currentSession = std::shared_ptr<RecordHandlerSession>( new RecordHandlerSession( this, signer, ctx, bio ) );
 234     }
 235
 236     currentSession->work();
 237 }