+ if( result ) {
+ std::shared_ptr<BIO> bios( BIO_new( BIO_s_mem() ), BIO_free );
+ const char* buf = result->certificate.data();
+ unsigned int len = result->certificate.size();
+
+ while( len > 0 ) {
+ int dlen = BIO_write( bios.get(), buf, len );
+
+ if( dlen <= 0 ) {
+ throw "Memory error.";
+ }
+
+ len -= dlen;
+ buf += dlen;
+ }
+
+ std::shared_ptr<X509> pem( PEM_read_bio_X509( bios.get(), NULL, 0, NULL ) );
+
+ if( !pem ) {
+ throw "Pem was not readable";
+ }
+
+ std::shared_ptr<BIGNUM> ser( ASN1_INTEGER_to_BN( pem->cert_info->serialNumber, NULL ), BN_free );
+ std::shared_ptr<char> serStr(
+ BN_bn2hex( ser.get() ),
+ []( char* p ) {
+ OPENSSL_free( p );
+ } ); // OPENSSL_free is a macro...
+ result->serial = std::string( serStr.get() );
+ }
+
+ if( !SSL_shutdown( ssl.get() ) && !SSL_shutdown( ssl.get() ) ) { // need to close the connection twice
+ std::cout << "SSL shutdown failed" << std::endl;
+ }
+