string ArscImpl::checkSignature(string messageStream)
{
MessagePacket signedMessagePacket = MessagePacket(messageStream);
gss_qop_t qopState;
gss_buffer_desc *in_buf, *out_buf;
int state=wrap;
OM_uint32 minorStatus,majorStatus;
in_buf=(gss_buffer_t) malloc(sizeof(gss_buffer_desc));
in_buf->value = (void*) signedMessagePacket.getMsg().c_str();
in_buf->length = signedMessagePacket.getMsg().length();
out_buf=(gss_buffer_desc*) malloc(sizeof(gss_buffer_desc));
majorStatus = gss_unwrap(&minorStatus,
context,
in_buf,
out_buf,
&state,
(gss_qop_t *) NULL);
// TODO release buffer
// gss_release_buffer(minorStatus,&messageBuffer);
//gss_release_buffer(minorStatus,&signToken);
if(majorStatus != GSS_S_COMPLETE)
{
cerr<<"Data Verify error."<<endl;
throw SignatureCheckingException();
}else
{
if (! state) {
cerr<<"Warning! Message not encrypted.\n"<<endl;
}
cout << "Data Verify sucessfull. : \n" <<endl;
return string((char *)out_buf->value,out_buf->length);
}
return MessagePacket().getStream();
}
int ArscImpl::initContext(){
if(auth())
{
gss_buffer_desc send_token;
gss_buffer_desc *token_ptr;
gss_name_t target_name;
MessagePacket msgIn , msgOut;
OM_uint32 min_stat,maj_stat,init_sec_min_stat;
OM_uint32 *ret_flags=(OM_uint32*)malloc(sizeof(OM_uint32));
string serviceName(SERVICENAME);
send_token.value = (void *) serviceName.c_str();
send_token.length = serviceName.length();
maj_stat = gss_import_name(&min_stat,&send_token,(gss_OID) gss_nt_user_name ,&target_name);
if(maj_stat != GSS_S_COMPLETE)
{
display_status("inicializing context",maj_stat,min_stat);
(void) gss_release_name(&min_stat, &target_name);
return 0;
}
token_ptr = GSS_C_NO_BUFFER;
context = GSS_C_NO_CONTEXT;
do {
maj_stat = gss_init_sec_context(&init_sec_min_stat,
GSS_C_NO_CREDENTIAL,
&context,
target_name,
GSS_C_NULL_OID,
GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG,
0,
NULL, // no chanel bindings
token_ptr,
NULL, // ignore mech type
&send_token,
ret_flags,
NULL); // ignore time_rec
if(send_token.length != 0){
msgOut = MessagePacket(std::string(id),
std::string((char*)send_token.value,send_token.length));
try{
msgIn = (*arsmStub).initiateContext(msgOut);
}catch(ContextInitiationException &e)
{
cerr << e.getMessage() << endl;
return 0;
}
}
(void) gss_release_buffer(&min_stat,&send_token);
if(maj_stat!=GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED){
display_status("initializing context",maj_stat,init_sec_min_stat);
(void) gss_release_name(&min_stat,&target_name);
if(context != GSS_C_NO_CONTEXT){
// (void) gss_delete_sec_context(&min_stat,context, GSS_C_NO_BUFFER);
}
return 0;
}
if(maj_stat == GSS_S_CONTINUE_NEEDED){
free(token_ptr);
token_ptr=(gss_buffer_desc*) malloc(sizeof(gss_buffer_desc));
token_ptr->value = (void *) msgIn.getMsg().c_str();
token_ptr->length = (int) msgIn.getMsg().length();
}
} while( maj_stat == GSS_S_CONTINUE_NEEDED);
(void) gss_release_name(&min_stat,&target_name);
printf("Context created. %s\n",id.c_str());
return 1;
} else
{
exit(2);
}
}