void *freecc_connect_cli(struct struct_clicon *param)
{
uint8 buf[CC_MAXMSGSIZE];
uint8 data[16];
int i;
struct cc_crypt_block sendblock; // crypto state block
struct cc_crypt_block recvblock; // crypto state block
char usr[64];
char pwd[255];
int sock = param->sock;
uint32 ip = param->ip;
free(param);
memset(usr, 0, sizeof(usr));
memset(pwd, 0, sizeof(pwd));
// create & send random seed
for(i=0; i<12; i++ ) data[i]=fast_rnd();
// Create Multics ID
data[3] = (data[0]^'M') + data[1] + data[2];
data[7] = data[4] + (data[5]^'C') + data[6];
data[11] = data[8] + data[9] + (data[10]^'S');
//Create checksum for "O" cccam:
for (i = 0; i < 4; i++) {
data[12 + i] = (data[i] + data[4 + i] + data[8 + i]) & 0xff;
}
send_nonb(sock, data, 16, 100);
//XOR init bytes with 'CCcam'
cc_crypt_xor(data);
//SHA1
SHA_CTX ctx;
SHA1_Init(&ctx);
SHA1_Update(&ctx, data, 16);
SHA1_Final(buf, &ctx);
//initialisate crypto states
cc_crypt_init(&sendblock, buf, 20);
cc_decrypt(&sendblock, data, 16);
cc_crypt_init(&recvblock, data, 16);
cc_decrypt(&recvblock, buf, 20);
//debugdump(buf, 20, "SHA1 hash:");
memcpy(usr,buf,20);
if ((i=recv_nonb(sock, buf, 20,3000)) == 20) {
cc_decrypt(&recvblock, buf, 20);
//debugdump(buf, 20, "Recv SHA1 hash:");
if ( memcmp(buf,usr,20)!=0 ) {
//debugf(" cc_connect_cli(): wrong sha1 hash from client! (%s)\n",ip2string(ip));
close(sock);
return NULL;
}
} else {
//debugf(" cc_connect_cli(): recv sha1 timeout\n");
close(sock);
return NULL;
}
// receive username
if ((i=recv_nonb(sock, buf, 20,3000)) == 20) {
cc_decrypt(&recvblock, buf, i);
memcpy(usr,buf,20);
//debugf(" cc_connect_cli(): username '%s'\n", usr);
}
else {
//debugf(" cc_connect_cli(): recv user timeout\n");
close(sock);
return NULL;
}
// Check for username
pthread_mutex_lock(&prg.lockfreecccli);
int found = 0;
struct cc_client_data *cli = cfg.freecccam.client;
while (cli) {
if (!strcmp(cfg.freecccam.user,usr)) {
if (cli->handle<=0) {
found = 1;
break;
}
else {
if (cli->ip == ip) { // dont connect
cc_disconnect_cli(cli);
found = 1;
break;
}
}
}
cli = cli->next;
}
if (!found)
while (cli) {
if (!strcmp(cfg.freecccam.user,usr)) {
if (cli->handle>0) {
// Check if we can disconnect idle state clients
if (GetTickCount()-cli->lastecmtime > 100000) cc_disconnect_cli(cli);
}
if (cli->handle<=0) {
found = 1;
break;
}
}
cli = cli->next;
}
pthread_mutex_unlock(&prg.lockfreecccli);
if (!found) {
debugf(" FreeCCcam: Failed to connect new client(%s)\n",ip2string(ip));
close(sock);
return NULL;
}
// receive passwd / 'CCcam'
strcpy( pwd, cfg.freecccam.pass);
cc_decrypt(&recvblock, (uint8*)pwd, strlen(pwd));
if ((i=recv_nonb(sock, buf, 6,3000)) == 6) {
cc_decrypt(&recvblock, buf, 6);
if (memcmp( buf+1, "Ccam\0",5)) {
debugf(" FreeCCcam: login failed from client(%s)\n",ip2string(ip));
close(sock);
return NULL;
}
}
else {
close(sock);
return NULL;
}
// send passwd ack
memset(buf, 0, 20);
memcpy(buf, "CCcam\0", 6);
//debugf("Server: send ack '%s'\n",buf);
cc_encrypt(&sendblock, buf, 20);
send_nonb(sock, buf, 20, 100);
sprintf(cli->user,"%s", ip2string(ip));
//cli->ecmnb=0;
//cli->ecmok=0;
memcpy(&cli->sendblock,&sendblock,sizeof(sendblock));
memcpy(&cli->recvblock,&recvblock,sizeof(recvblock));
debugf(" FreeCCcam: client(%s) connected\n",ip2string(ip));
// recv cli data
memset(buf, 0, sizeof(buf));
i = cc_msg_recv( sock, &cli->recvblock, buf, 3000);
if (i!=97) {
debug("error recv cli data\n");
close(sock);
return NULL;
}
// Setup Client Data
// pthread_mutex_lock(&prg.lockfreecccli);
memcpy( cli->nodeid, buf+24, 8);
memcpy( cli->version, buf+33, 32);
memcpy( cli->build, buf+65, 32 );
debugf(" FreeCCcam: client(%s) running version %s build %s\n",ip2string(ip), cli->version, cli->build); // cli->nodeid,8,
cli->cardsent = 0;
cli->connected = GetTickCount();
cli->lastecmtime = GetTickCount();
cli->handle = sock;
cli->ip = ip;
cli->chkrecvtime = 0;
// pthread_mutex_unlock(&prg.lockfreecccli);
// send cli data ack
cc_msg_send( sock, &cli->sendblock, CC_MSG_CLI_INFO, 0, NULL);
//cc_msg_send( sock, &cli->sendblock, CC_MSG_BAD_ECM, 0, NULL);
int sendversion = ( (cli->version[28]=='W')&&(cli->version[29]='H')&&(cli->version[30]='O') );
cc_sendinfo_cli(cli, sendversion);
//cc_msg_send( sock, &cli->sendblock, CC_MSG_BAD_ECM, 0, NULL);
cli->cardsent = 1;
usleep(10000);
frcc_sendcards_cli(cli);
pipe_wakeup( srvsocks[1] );
return cli;
}
///////////////////////////////////////////////////////////////////////////////
// Connect to a server.
// Return
// 0: no error
int cc_connect_srv(struct cs_server_data *srv, int fd)
{
int n;
uint8 data[20];
uint8 hash[SHA_DIGEST_LENGTH];
uint8 buf[CC_MAXMSGSIZE];
char pwd[64];
//
if (fd < 0) return -1;
// INIT
srv->progname = NULL;
memset( srv->version, 0, sizeof(srv->version) );
// get init seed(random) from server
if((n = recv_nonb(fd, data, 16,3000)) != 16) {
static char msg[]= "Server does not return init sequence";
srv->statmsg = msg;
//debugf("Client: Server (%s:%d) does not return 16 bytes\n", srv->host->name,srv->port);
close(fd);
return -2;
}
if (flag_debugnet) {
debugf(" CCcam: receive server init seed (%d)\n",n);
debughex(data,n);
}
// Check newbox
int isnewbox = 0;
uchar a = (data[0]^'M') + data[1] + data[2];
uchar b = data[4] + (data[5]^'C') + data[6];
uchar c = data[8] + data[9] + (data[10]^'S');
if ( (a==data[3])&&(b==data[7])&&(c==data[11]) ) isnewbox = 1;
cc_crypt_xor(data); // XOR init bytes with 'CCcam'
SHA_CTX ctx;
SHA1_Init(&ctx);
SHA1_Update(&ctx, data, 16);
SHA1_Final(hash, &ctx);
//debugdump(hash, sizeof(hash), "CCcam: sha1 hash:");
//initialisate crypto states
cc_crypt_init(&srv->recvblock, hash, 20);
cc_decrypt(&srv->recvblock, data, 16);
cc_crypt_init(&srv->sendblock, data, 16);
cc_decrypt(&srv->sendblock, hash, 20);
cc_msg_send( fd, &srv->sendblock, CC_MSG_NO_HEADER, 20,hash); // send crypted hash to server
memset(buf, 0, sizeof(buf));
memcpy(buf, srv->user, 20);
//debugf(" CCcam: username '%s'\n",srv->username);
cc_msg_send( fd, &srv->sendblock, CC_MSG_NO_HEADER, 20, buf); // send usr '0' padded -> 20 bytes
memset(buf, 0, sizeof(buf));
memset(pwd, 0, sizeof(pwd));
//debugf("CCcam: 'CCcam' xor\n");
memcpy(buf, "CCcam", 5);
strncpy(pwd, srv->pass, 63);
cc_encrypt(&srv->sendblock, (uint8 *)pwd, strlen(pwd));
cc_msg_send( fd, &srv->sendblock, CC_MSG_NO_HEADER, 6, buf); // send 'CCcam' xor w/ pwd
if ((n = recv_nonb(fd, data, 20,3000)) != 20) {
static char msg[]= "Password ACK not received";
srv->statmsg = msg;
debugf(" CCcam: login failed to Server (%s:%d), pwd ack not received (n = %d)\n",srv->host->name,srv->port, n);
return -2;
}
cc_decrypt(&srv->recvblock, data, 20);
//hexdump(data, 20, "CCcam: pwd ack received:");
if (memcmp(data, buf, 5)) { // check server response
static char msg[]= "Invalid user/pass";
srv->statmsg = msg;
debugf(" CCcam: login failed to Server (%s:%d), usr/pwd invalid\n",srv->host->name,srv->port);
return -2;
}// else debugf(" CCcam: login succeeded to Server (%s:%d)\n",srv->host->name,srv->port);
srv->handle = fd;
if (!cc_sendinfo_srv(srv,isnewbox)) {
srv->handle = -1;
static char msg[]= "Error sending client data";
srv->statmsg = msg;
debugf(" CCcam: login failed to Server (%s:%d), could not send client data\n",srv->host->name,srv->port);
return -3;
}
static char msg[]= "Connected";
srv->statmsg = msg;
srv->keepalivesent = 0;
srv->keepalivetime = GetTickCount();
srv->connected = GetTickCount();
srv->busy = 0;
srv->lastecmoktime = 0;
srv->lastecmtime = 0;
srv->lastdcwtime = 0;
srv->chkrecvtime = 0;
memset(srv->version,0,32);
pipe_wakeup( srvsocks[1] );
return 0;
}
