hs.hsadmin/hsacppcli/hsadminc/source/sslclient.cpp
Christof Donat c64ab570a1 added more or less resurrected C++ cli client. This will need a lot of
work.

please note, that I would do quite some things differently nowadays. I
home to get those things in via refactoring
2012-04-24 15:15:42 +00:00

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/***************************************************************************
* Copyright (C) 2005 by Christof Donat *
* cdonat@gmx.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "sslclient.h"
#include "logger.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <boost/filesystem/operations.hpp>
#include <boost/lexical_cast.hpp>
#include <gnutls/x509.h>
using std::string;
using std::streamsize;
using boost::lexical_cast;
using boost::bad_lexical_cast;
int SSLDevice::countInstances = 0;
SSLDevice::SSLDevice(const string& address, const short int port): m_session(0) {
this->init(address.c_str(),port);
}
SSLDevice::SSLDevice(const char* address, const short int port): m_session(0) {
this->init(address,port);
}
void SSLDevice::init(const char* address, const short int port) {
struct sockaddr_in addr;
bzero(&addr,sizeof(addr));
addr.sin_family = AF_INET;
if( (addr.sin_addr.s_addr = inet_addr(address)) == INADDR_NONE ) {
struct hostent* hp = gethostbyname(address);
if( hp == 0 ) throw("can't resolve hostname '"+string(address)+"'");
bcopy(hp->h_addr, (char*) &addr.sin_addr, hp->h_length);
}
addr.sin_port = htons(port);
if( (m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0 ) throw(string("can't open socket"));
if( ::connect(m_socket, (struct sockaddr*) &addr, sizeof(addr)) < 0 ) {
::close(m_socket);
throw("can't connect to '"+string(address)+"' port "+(lexical_cast<string>(port)));
}
const int cert_type_priority[3] = { GNUTLS_CRT_X509, GNUTLS_CRT_OPENPGP, 0 };
m_session = new gnutls_session;
if( countInstances == 0 ) gnutls_global_init();
countInstances++;
gnutls_certificate_allocate_credentials(&m_xcred);
gnutls_certificate_set_x509_trust_file(m_xcred, "ca.pem", GNUTLS_X509_FMT_PEM);
gnutls_init(m_session,GNUTLS_CLIENT);
gnutls_set_default_priority(*m_session);
gnutls_credentials_set(*m_session, GNUTLS_CRD_CERTIFICATE, m_xcred);
gnutls_transport_set_ptr(*m_session, (gnutls_transport_ptr)&m_socket);
if( gnutls_handshake(*m_session) < 0 )
throw(string(gnutls_protocol_get_name(gnutls_protocol_get_version(*m_session)))+" Handshake failed");
verify_certificate( *m_session, address);
}
SSLDevice::SSLDevice(const SSLDevice& other) : m_session(other.m_session), m_socket(other.m_socket), m_xcred(other.m_xcred) { }
SSLDevice::~SSLDevice() { }
void SSLDevice::closeSocket() {
gnutls_bye(*m_session, GNUTLS_SHUT_RDWR);
gnutls_certificate_free_credentials(m_xcred);
::close(m_socket);
gnutls_deinit(*m_session);
delete(m_session);
countInstances--;
if( countInstances == 0 ) gnutls_global_deinit();
}
streamsize SSLDevice::read(char* s, streamsize n) { return (streamsize)gnutls_record_recv(*m_session,(void*)s,(size_t)n); }
streamsize SSLDevice::write(const char* s, streamsize n) {
/*streamsize i = (streamsize)gnutls_record_send(*m_session,(const void*)s,(size_t)n);
Logger::log(Logger::DEBUG,string("sending ")+boost::lexical_cast<string>(i)+" von "+boost::lexical_cast<string>(n)+" bytes: \n---\n"+s+"\n---\n");*/
return (streamsize)gnutls_record_send(*m_session,(const void*)s,(size_t)n); //i;
}
void SSLDevice::verify_certificate( gnutls_session session, string hostname) {
boost::filesystem::path general("/etc/hsadminc.cert");
if( boost::filesystem::exists(general) && !boost::filesystem::is_directory(general) )
gnutls_certificate_set_x509_trust_file (m_xcred, general.native().c_str(), GNUTLS_X509_FMT_PEM);
//string privfilename = getenv("HOME");
string priv = getenv("HOME");
boost::filesystem::path p( priv + "/.hsadmin.cert" );
//p /= ".hsadminc.conf";
if( boost::filesystem::exists(p) && !boost::filesystem::is_directory(p) )
gnutls_certificate_set_x509_trust_file (m_xcred, p.native().c_str(), GNUTLS_X509_FMT_PEM);
//gnutls_certificate_set_x509_trust_file (m_xcred, const char * cafile, PEM)
unsigned int status = 0;//gnutls_certificate_verify_peers(*m_session);
/*if( gnutls_certificate_verify_peers2(*m_session, &status) < 0 )
throw(string("Error while verifying certificate"));*/
string tval = "Certificate Verification failed: ";
if( status & GNUTLS_CERT_INVALID ) { throw(tval+"The certificate is not trustet"); }
if( status & GNUTLS_CERT_SIGNER_NOT_FOUND ) { throw(tval+"The certificate has no known Issuer"); }
if( status & GNUTLS_CERT_REVOKED ) { throw(tval+"The certificate has been revoked"); }
// the further checks are only valid for X509 certificates
if ( gnutls_certificate_type_get(session) != GNUTLS_CRT_X509) return;
const gnutls_datum* cert_list;
unsigned int cert_list_size;
gnutls_x509_crt cert;
if ( gnutls_x509_crt_init(&cert) < 0) throw(tval+"error in initialization");
cert_list = gnutls_certificate_get_peers(session, &cert_list_size);
if ( cert_list == NULL ) throw(tval+"no certificate found");
bool failed = false;
string tReason = "";
for( int i = 0; i < cert_list_size-1; i++ ) {
bool failed = false;
if ( gnutls_x509_crt_import( cert, &cert_list[0], GNUTLS_X509_FMT_DER) < 0)
throw(tval+"error parsing certificate Number "+lexical_cast<string>(i));
if ( gnutls_x509_crt_get_expiration_time(cert) < time(0) ) {
tReason = "The certificate has expired";
failed = true;
}
if ( gnutls_x509_crt_get_activation_time(cert) > time(0) ) {
tReason = "The certificate is not yet activated";
failed = true;
}
if ( !gnutls_x509_crt_check_hostname(cert,hostname.c_str()) ) {
tReason = "The certificates owner does not match hostname ";
tReason += hostname +"'";
failed = true;
}
gnutls_x509_crt_deinit(cert);
if( !failed ) break;
}
if( failed ) throw(tval+tReason);
}