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tvheadend/cwc.c

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/*
* tvheadend, CWC interface
* Copyright (C) 2007 Andreas Öman
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <pthread.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <rpc/des_crypt.h>
#include "tvhead.h"
#include "tcp.h"
#include "psi.h"
#include "tsdemux.h"
#include "ffdecsa/FFdecsa.h"
#include "dispatch.h"
#include "transports.h"
#include "cwc.h"
#include "notify.h"
#include "dtable.h"
static int cwc_tally;
#define CWC_KEEPALIVE_INTERVAL 600
#define CWS_NETMSGSIZE 240
#define CWS_FIRSTCMDNO 0xe0
typedef enum {
MSG_CLIENT_2_SERVER_LOGIN = CWS_FIRSTCMDNO,
MSG_CLIENT_2_SERVER_LOGIN_ACK,
MSG_CLIENT_2_SERVER_LOGIN_NAK,
MSG_CARD_DATA_REQ,
MSG_CARD_DATA,
MSG_SERVER_2_CLIENT_NAME,
MSG_SERVER_2_CLIENT_NAME_ACK,
MSG_SERVER_2_CLIENT_NAME_NAK,
MSG_SERVER_2_CLIENT_LOGIN,
MSG_SERVER_2_CLIENT_LOGIN_ACK,
MSG_SERVER_2_CLIENT_LOGIN_NAK,
MSG_ADMIN,
MSG_ADMIN_ACK,
MSG_ADMIN_LOGIN,
MSG_ADMIN_LOGIN_ACK,
MSG_ADMIN_LOGIN_NAK,
MSG_ADMIN_COMMAND,
MSG_ADMIN_COMMAND_ACK,
MSG_ADMIN_COMMAND_NAK,
MSG_KEEPALIVE = CWS_FIRSTCMDNO + 0x1d
} net_msg_type_t;
struct cwc_queue cwcs;
extern char *cwc_krypt(const char *key, const char *salt);
static LIST_HEAD(, cwc_transport) cwc_pending_requests;
typedef struct cwc_transport {
th_descrambler_t ct_head;
th_transport_t *ct_transport;
struct cwc *ct_cwc;
LIST_ENTRY(cwc_transport) ct_cwc_link; /* Always linked */
LIST_ENTRY(cwc_transport) ct_link; /* linked if we are waiting
on a reply from server */
int ct_pending;
enum {
CT_UNKNOWN,
CT_RESOLVED,
CT_FORBIDDEN
} ct_keystate;
uint16_t ct_seq;
uint8_t ct_ecm[256];
int ct_ecmsize;
void *ct_keys;
int ct_cluster_size;
uint8_t *ct_tsbcluster;
int ct_fill;
} cwc_transport_t;
/**
*
*/
static void
cwc_set_state(cwc_t *cwc, int newstate, const char *errtxt)
{
cwc->cwc_state = newstate;
if(newstate == CWC_STATE_IDLE)
cwc->cwc_errtxt = errtxt;
//notify_cwc_status_change(cwc);
}
/**
*
*/
static void
des_key_parity_adjust(uint8_t *key, uint8_t len)
{
uint8_t i, j, parity;
for (i = 0; i < len; i++) {
parity = 1;
for (j = 1; j < 8; j++) if ((key[i] >> j) & 0x1) parity = ~parity & 0x01;
key[i] |= parity;
}
}
/**
*
*/
static uint8_t *
des_key_spread(uint8_t *normal)
{
static uint8_t spread[16];
spread[ 0] = normal[ 0] & 0xfe;
spread[ 1] = ((normal[ 0] << 7) | (normal[ 1] >> 1)) & 0xfe;
spread[ 2] = ((normal[ 1] << 6) | (normal[ 2] >> 2)) & 0xfe;
spread[ 3] = ((normal[ 2] << 5) | (normal[ 3] >> 3)) & 0xfe;
spread[ 4] = ((normal[ 3] << 4) | (normal[ 4] >> 4)) & 0xfe;
spread[ 5] = ((normal[ 4] << 3) | (normal[ 5] >> 5)) & 0xfe;
spread[ 6] = ((normal[ 5] << 2) | (normal[ 6] >> 6)) & 0xfe;
spread[ 7] = normal[ 6] << 1;
spread[ 8] = normal[ 7] & 0xfe;
spread[ 9] = ((normal[ 7] << 7) | (normal[ 8] >> 1)) & 0xfe;
spread[10] = ((normal[ 8] << 6) | (normal[ 9] >> 2)) & 0xfe;
spread[11] = ((normal[ 9] << 5) | (normal[10] >> 3)) & 0xfe;
spread[12] = ((normal[10] << 4) | (normal[11] >> 4)) & 0xfe;
spread[13] = ((normal[11] << 3) | (normal[12] >> 5)) & 0xfe;
spread[14] = ((normal[12] << 2) | (normal[13] >> 6)) & 0xfe;
spread[15] = normal[13] << 1;
des_key_parity_adjust(spread, 16);
return spread;
}
/**
*
*/
static void
des_random_get(uint8_t *buffer, uint8_t len)
{
uint8_t idx = 0;
int randomNo = 0;
for (idx = 0; idx < len; idx++) {
if (!(idx % 3)) randomNo = rand();
buffer[idx] = (randomNo >> ((idx % 3) << 3)) & 0xff;
}
}
/**
*
*/
static int
des_encrypt(uint8_t *buffer, int len, uint8_t *deskey)
{
uint8_t checksum = 0;
uint8_t noPadBytes;
uint8_t padBytes[7];
char ivec[8];
uint16_t i;
if (!deskey) return len;
noPadBytes = (8 - ((len - 1) % 8)) % 8;
if (len + noPadBytes + 1 >= CWS_NETMSGSIZE-8) return -1;
des_random_get(padBytes, noPadBytes);
for (i = 0; i < noPadBytes; i++) buffer[len++] = padBytes[i];
for (i = 2; i < len; i++) checksum ^= buffer[i];
buffer[len++] = checksum;
des_random_get((uint8_t *)ivec, 8);
memcpy(buffer+len, ivec, 8);
for (i = 2; i < len; i += 8) {
cbc_crypt((char *)deskey , (char *) buffer+i, 8, DES_ENCRYPT, ivec);
ecb_crypt((char *)deskey+8, (char *) buffer+i, 8, DES_DECRYPT);
ecb_crypt((char *)deskey , (char *) buffer+i, 8, DES_ENCRYPT);
memcpy(ivec, buffer+i, 8);
}
len += 8;
return len;
}
/**
*
*/
static int
des_decrypt(uint8_t *buffer, int len, uint8_t *deskey)
{
char ivec[8];
char nextIvec[8];
int i;
uint8_t checksum = 0;
if (!deskey) return len;
if ((len-2) % 8 || (len-2) < 16) return -1;
len -= 8;
memcpy(nextIvec, buffer+len, 8);
for (i = 2; i < len; i += 8)
{
memcpy(ivec, nextIvec, 8);
memcpy(nextIvec, buffer+i, 8);
ecb_crypt((char *)deskey , (char *) buffer+i, 8, DES_DECRYPT);
ecb_crypt((char *)deskey+8, (char *) buffer+i, 8, DES_ENCRYPT);
cbc_crypt((char *)deskey , (char *) buffer+i, 8, DES_DECRYPT, ivec);
}
for (i = 2; i < len; i++) checksum ^= buffer[i];
if (checksum) return -1;
return len;
}
/**
*
*/
static void
des_make_login_key(cwc_t *cwc, uint8_t *k)
{
uint8_t des14[14];
int i;
for (i = 0; i < 14; i++)
des14[i] = cwc->cwc_confedkey[i] ^ k[i];
memcpy(cwc->cwc_key, des_key_spread(des14), 16);
}
/**
*
*/
static void
des_make_session_key(cwc_t *cwc)
{
uint8_t des14[14], *k2 = (uint8_t *)cwc->cwc_password_salted;
int i, l = strlen(cwc->cwc_password_salted);
memcpy(des14, cwc->cwc_confedkey, 14);
for (i = 0; i < l; i++)
des14[i % 14] ^= k2[i];
memcpy(cwc->cwc_key, des_key_spread(des14), 16);
}
/**
*
*/
static void
cwc_timeout(void *aux, int64_t now)
{
cwc_t *cwc = aux;
tcp_disconnect(&cwc->cwc_tcp_session, ETIMEDOUT);
}
/**
*
*/
static int
cwc_send_msg(cwc_t *cwc, const uint8_t *msg, size_t len, int sid)
{
tcp_session_t *ses = &cwc->cwc_tcp_session;
uint8_t *buf = malloc(CWS_NETMSGSIZE);
memset(buf, 0, 12);
memcpy(buf + 12, msg, len);
len += 12;
cwc->cwc_seq++;
buf[2] = cwc->cwc_seq >> 8;
buf[3] = cwc->cwc_seq;
buf[4] = sid >> 8;
buf[5] = sid;
if((len = des_encrypt(buf, len, cwc->cwc_key)) < 0) {
free(buf);
return -1;
}
buf[0] = (len - 2) >> 8;
buf[1] = len - 2;
tcp_send_msg(ses, 0, buf, len);
/* Expect a response within 4 seconds */
dtimer_arm(&cwc->cwc_idle_timer, cwc_timeout, cwc, 4);
return cwc->cwc_seq;
}
/**
* Card data command
*/
static void
cwc_send_data_req(cwc_t *cwc)
{
uint8_t buf[CWS_NETMSGSIZE];
cwc_set_state(cwc, CWC_STATE_WAIT_CARD_DATA, NULL);
buf[0] = MSG_CARD_DATA_REQ;
buf[1] = 0;
buf[2] = 0;
cwc_send_msg(cwc, buf, 3, 0);
}
/**
* Send keep alive
*/
static void
cwc_send_ka(void *aux, int64_t now)
{
cwc_t *cwc = aux;
uint8_t buf[CWS_NETMSGSIZE];
buf[0] = MSG_KEEPALIVE;
buf[1] = 0;
buf[2] = 0;
cwc_send_msg(cwc, buf, 3, 0);
dtimer_arm(&cwc->cwc_send_ka_timer, cwc_send_ka, cwc,
CWC_KEEPALIVE_INTERVAL);
}
/**
* Handle reply to card data request
*/
static int
cwc_dispatch_card_data_reply(cwc_t *cwc, uint8_t msgtype,
uint8_t *msg, int len)
{
int plen;
const char *n;
if(msgtype != MSG_CARD_DATA)
return EBADMSG;
msg += 12;
len -= 12;
plen = (msg[1] & 0xf) << 8 | msg[2];
if(plen < 14)
return EBADMSG;
cwc->cwc_caid = (msg[4] << 8) | msg[5];
n = psi_caid2name(cwc->cwc_caid) ?: "Unknown";
tvhlog(LOG_INFO, "cwc", "%s: Connected as user 0x%02x "
"to a %s-card [0x%04x : %02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x] "
"with %d providers",
cwc->cwc_tcp_session.tcp_hostname,
msg[3], n, cwc->cwc_caid,
msg[6], msg[7], msg[8], msg[9], msg[10], msg[11], msg[12], msg[13],
msg[14]);
cwc_set_state(cwc, CWC_STATE_RUNNING, NULL);
/* Send KA every CWC_KEEPALIVE_INTERVAL seconds */
dtimer_arm(&cwc->cwc_send_ka_timer, cwc_send_ka, cwc,
CWC_KEEPALIVE_INTERVAL);
return 0;
}
/**
* Login command
*/
static void
cwc_send_login(cwc_t *cwc)
{
uint8_t buf[CWS_NETMSGSIZE];
int ul = strlen(cwc->cwc_username) + 1;
int pl = strlen(cwc->cwc_password_salted) + 1;
cwc_set_state(cwc, CWC_STATE_WAIT_LOGIN_ACK, NULL);
buf[0] = MSG_CLIENT_2_SERVER_LOGIN;
buf[1] = 0;
buf[2] = ul + pl;
memcpy(buf + 3, cwc->cwc_username, ul);
memcpy(buf + 3 + ul, cwc->cwc_password_salted, pl);
cwc_send_msg(cwc, buf, ul + pl + 3, 0);
}
/**
* Handle reply to login
*/
static int
cwc_dispatch_login_reply(cwc_t *cwc, uint8_t msgtype, uint8_t *msg, int len)
{
switch(msgtype) {
case MSG_CLIENT_2_SERVER_LOGIN_ACK:
tvhlog(LOG_INFO, "cwc", "%s: Login ok",
cwc->cwc_tcp_session.tcp_hostname);
des_make_session_key(cwc);
cwc_send_data_req(cwc);
return 0;
case MSG_CLIENT_2_SERVER_LOGIN_NAK:
tvhlog(LOG_INFO, "cwc", "%s: Authentication denied",
cwc->cwc_tcp_session.tcp_hostname);
return EACCES;
default:
tvhlog(LOG_INFO, "cwc", "%s: Invalid response (msgcode = %d) during login",
cwc->cwc_tcp_session.tcp_hostname, msgtype);
return EBADMSG;
}
}
/**
* Handle reply to login
*/
static int
cwc_dispatch_running_reply(cwc_t *cwc, uint8_t msgtype, uint8_t *msg, int len)
{
cwc_transport_t *ct;
uint16_t seq = (msg[2] << 8) | msg[3];
th_transport_t *t;
len -= 12;
msg += 12;
switch(msgtype) {
case 0x80:
case 0x81:
LIST_FOREACH(ct, &cwc_pending_requests, ct_link) {
if(ct->ct_seq == seq)
break;
}
if(ct == NULL)
return 0;
t = ct->ct_transport;
LIST_REMOVE(ct, ct_link);
ct->ct_pending = 0;
if(len < 19) {
if(ct->ct_keystate != CT_FORBIDDEN) {
tvhlog(LOG_ERR, "cwc",
"Can not descramble \"%s\" for service \"%s\", access denied",
t->tht_identifier, t->tht_svcname);
ct->ct_keystate = CT_FORBIDDEN;
}
return 0;
}
if(ct->ct_keystate != CT_RESOLVED)
tvhlog(LOG_INFO, "cwc",
"Obtained key for \"%s\" for service \"%s\"",
t->tht_identifier, t->tht_svcname);
ct->ct_keystate = CT_RESOLVED;
set_control_words(ct->ct_keys, msg + 3, msg + 3 + 8);
break;
}
return 0;
}
/**
*
*/
static void
cwc_data_input(cwc_t *cwc)
{
int msglen, r;
tcp_session_t *ses = &cwc->cwc_tcp_session;
int fd = ses->tcp_fd;
if(cwc->cwc_state == CWC_STATE_WAIT_LOGIN_KEY) {
r = read(fd, cwc->cwc_buf + cwc->cwc_bufptr, 14 - cwc->cwc_bufptr);
if(r < 1) {
tcp_disconnect(ses, r == 0 ? ECONNRESET : errno);
return;
}
cwc->cwc_bufptr += r;
if(cwc->cwc_bufptr < 14)
return;
des_make_login_key(cwc, cwc->cwc_buf);
cwc_send_login(cwc);
cwc->cwc_bufptr = 0;
} else {
if(cwc->cwc_bufptr < 2) {
msglen = 2;
} else {
msglen = ((cwc->cwc_buf[0] << 8) | cwc->cwc_buf[1]) + 2;
if(msglen >= CWS_NETMSGSIZE) {
tcp_disconnect(ses, EMSGSIZE);
return;
}
}
r = read(fd, cwc->cwc_buf + cwc->cwc_bufptr, msglen - cwc->cwc_bufptr);
if(r < 1) {
tcp_disconnect(ses, r == 0 ? ECONNRESET : errno);
return;
}
cwc->cwc_bufptr += r;
if(msglen > 2 && cwc->cwc_bufptr == msglen) {
if((msglen = des_decrypt(cwc->cwc_buf, msglen, cwc->cwc_key)) < 15) {
tcp_disconnect(ses, EILSEQ);
return;
}
cwc->cwc_bufptr = 0;
switch(cwc->cwc_state) {
case CWC_STATE_WAIT_LOGIN_ACK:
r = cwc_dispatch_login_reply(cwc, cwc->cwc_buf[12],
cwc->cwc_buf, msglen);
break;
case CWC_STATE_WAIT_CARD_DATA:
r = cwc_dispatch_card_data_reply(cwc, cwc->cwc_buf[12],
cwc->cwc_buf, msglen);
break;
case CWC_STATE_RUNNING:
r = cwc_dispatch_running_reply(cwc, cwc->cwc_buf[12],
cwc->cwc_buf, msglen);
break;
default:
r = EBADMSG;
break;
}
if(r != 0) {
tcp_disconnect(ses, r);
return;
}
}
}
}
/**
*
*/
static void
cwc_tcp_callback(tcpevent_t event, void *tcpsession)
{
cwc_t *cwc = tcpsession;
dtimer_disarm(&cwc->cwc_idle_timer);
switch(event) {
case TCP_CONNECT:
cwc->cwc_seq = 0;
cwc->cwc_bufptr = 0;
cwc_set_state(cwc, CWC_STATE_WAIT_LOGIN_KEY, NULL);
/* We want somthing within 20 seconds */
dtimer_arm(&cwc->cwc_idle_timer, cwc_timeout, cwc, 20);
break;
case TCP_DISCONNECT:
cwc_set_state(cwc, CWC_STATE_IDLE, "Disconnected");
dtimer_disarm(&cwc->cwc_send_ka_timer);
break;
case TCP_INPUT:
cwc_data_input(cwc);
break;
}
}
/**
*
*/
static void
cwc_table_input(struct th_descrambler *td, struct th_transport *t,
struct th_stream *st, uint8_t *data, int len)
{
cwc_transport_t *ct = (cwc_transport_t *)td;
uint16_t sid = t->tht_dvb_service_id;
cwc_t *cwc = ct->ct_cwc;
if(cwc->cwc_caid != st->st_caid)
return;
if((data[0] & 0xf0) != 0x80)
return;
switch(data[0]) {
case 0x80:
case 0x81:
/* ECM */
if(ct->ct_pending)
return;
if(ct->ct_ecmsize == len && !memcmp(ct->ct_ecm, data, len))
return; /* key already sent */
if(cwc->cwc_state != CWC_STATE_RUNNING) {
/* New key, but we are not connected (anymore), can not descramble */
ct->ct_keystate = CT_UNKNOWN;
break;
}
memcpy(ct->ct_ecm, data, len);
ct->ct_ecmsize = len;
ct->ct_seq = cwc_send_msg(cwc, data, len, sid);
LIST_INSERT_HEAD(&cwc_pending_requests, ct, ct_link);
ct->ct_pending = 1;
break;
default:
/* EMM */
cwc_send_msg(cwc, data, len, sid);
break;
}
}
/**
*
*/
static int
cwc_descramble(th_descrambler_t *td, th_transport_t *t, struct th_stream *st,
uint8_t *tsb)
{
cwc_transport_t *ct = (cwc_transport_t *)td;
int r, i;
unsigned char *vec[3];
uint8_t *t0;
if(ct->ct_keystate == CT_FORBIDDEN)
return 1;
if(ct->ct_keystate != CT_RESOLVED)
return -1;
memcpy(ct->ct_tsbcluster + ct->ct_fill * 188, tsb, 188);
ct->ct_fill++;
if(ct->ct_fill != ct->ct_cluster_size)
return 0;
ct->ct_fill = 0;
vec[0] = ct->ct_tsbcluster;
vec[1] = ct->ct_tsbcluster + ct->ct_cluster_size * 188;
vec[2] = NULL;
while(1) {
t0 = vec[0];
r = decrypt_packets(ct->ct_keys, vec);
if(r == 0)
break;
for(i = 0; i < r; i++) {
ts_recv_packet2(t, t0);
t0 += 188;
}
}
return 0;
}
/**
*
*/
static void
cwc_transport_destroy(cwc_transport_t *ct)
{
if(ct->ct_pending)
LIST_REMOVE(ct, ct_link);
LIST_REMOVE(ct, ct_cwc_link);
free_key_struct(ct->ct_keys);
free(ct->ct_tsbcluster);
free(ct);
}
/**
*
*/
static void
cwc_transport_stop(th_descrambler_t *td)
{
LIST_REMOVE(td, td_transport_link);
cwc_transport_destroy((cwc_transport_t *)td);
}
/**
* Check if our CAID's matches, and if so, link
*/
void
cwc_transport_start(th_transport_t *t)
{
cwc_t *cwc;
cwc_transport_t *ct;
th_descrambler_t *td;
th_stream_t *st;
TAILQ_FOREACH(cwc, &cwcs, cwc_link) {
if(cwc->cwc_caid == 0)
continue;
LIST_FOREACH(st, &t->tht_streams, st_link)
if(st->st_caid == cwc->cwc_caid)
break;
if(st == NULL)
continue;
ct = calloc(1, sizeof(cwc_transport_t));
ct->ct_cluster_size = get_suggested_cluster_size();
ct->ct_tsbcluster = malloc(ct->ct_cluster_size * 188);
ct->ct_keys = get_key_struct();
ct->ct_cwc = cwc;
ct->ct_transport = t;
LIST_INSERT_HEAD(&cwc->cwc_transports, ct, ct_cwc_link);
td = &ct->ct_head;
td->td_stop = cwc_transport_stop;
td->td_table = cwc_table_input;
td->td_descramble = cwc_descramble;
LIST_INSERT_HEAD(&t->tht_descramblers, td, td_transport_link);
}
}
#if 0
/**
*
*/
static void
cwc_save(void)
{
cwc_t *cwc;
FILE *fp;
char buf[400];
snprintf(buf, sizeof(buf), "%s/cwc.cfg", settings_dir);
if((fp = settings_open_for_write(buf)) == NULL)
return;
TAILQ_FOREACH(cwc, &cwcs, cwc_link) {
fprintf(fp, "cwc {\n");
fprintf(fp, "\thostname = %s\n", cwc->cwc_tcp_session.tcp_hostname);
fprintf(fp, "\tport = %d\n", cwc->cwc_tcp_session.tcp_port);
fprintf(fp, "\tusername = %s\n", cwc->cwc_username);
fprintf(fp, "\tpassword = %s\n", cwc->cwc_password);
fprintf(fp, "\tdeskey = "
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:"
"%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
cwc->cwc_confedkey[0x0],
cwc->cwc_confedkey[0x1],
cwc->cwc_confedkey[0x2],
cwc->cwc_confedkey[0x3],
cwc->cwc_confedkey[0x4],
cwc->cwc_confedkey[0x5],
cwc->cwc_confedkey[0x6],
cwc->cwc_confedkey[0x7],
cwc->cwc_confedkey[0x8],
cwc->cwc_confedkey[0x9],
cwc->cwc_confedkey[0xa],
cwc->cwc_confedkey[0xb],
cwc->cwc_confedkey[0xc],
cwc->cwc_confedkey[0xd]);
fprintf(fp, "\tenabled = %d\n", cwc->cwc_tcp_session.tcp_enabled);
fprintf(fp, "}\n");
}
fclose(fp);
}
/**
*
*/
static int
nibble(char c)
{
switch(c) {
case '0' ... '9':
return c - '0';
case 'a' ... 'f':
return c - 'a' + 10;
case 'A' ... 'F':
return c - 'A' + 10;
default:
return 0;
}
}
/**
*
*/
const char *
cwc_add(const char *hostname, const char *porttxt, const char *username,
const char *password, const char *deskey, const char *enabled,
int save, int salt)
{
const char *k;
cwc_t *cwc;
uint8_t key[14];
int i, u, l, port;
if(hostname == NULL || strlen(hostname) < 1)
return "Invalid hostname";
if(porttxt == NULL)
return "Invalid port";
port = atoi(porttxt);
if(port < 1 || port > 65535)
return "Invalid port";
if(username == NULL || strlen(username) < 1)
return "Invalid username";
if(password == NULL || strlen(password) < 1)
return "Invalid password";
if(deskey == NULL)
return "Invalid DES-key";
k = deskey;
for(i = 0; i < 14; i++) {
while(*k != 0 && !isxdigit(*k)) k++;
if(*k == 0)
break;
u = nibble(*k++);
while(*k != 0 && !isxdigit(*k)) k++;
if(*k == 0)
break;
l = nibble(*k++);
key[i] = (u << 4) | l;
}
if(i != 14)
return "DES-key does not contain 14 valid hexadecimal bytes";
if(enabled == NULL)
return "Enabled not set";
cwc = tcp_create_client(hostname, port, sizeof(cwc_t),
"cwc", cwc_tcp_callback, atoi(enabled));
cwc->cwc_username = strdup(username);
if(salt) {
cwc->cwc_password = strdup(cwc_krypt(password, "$1$abcdefgh$"));
} else {
cwc->cwc_password = strdup(password);
}
cwc->cwc_id = ++cwc_tally;
memcpy(cwc->cwc_confedkey, key, 14);
TAILQ_INSERT_TAIL(&cwcs, cwc, cwc_link);
if(save)
cwc_save();
return NULL;
}
#endif
/**
*
*/
static void
cwc_destroy(cwc_t *cwc)
{
cwc_transport_t *ct;
while((ct = LIST_FIRST(&cwc->cwc_transports)) != NULL)
cwc_transport_destroy(ct);
TAILQ_REMOVE(&cwcs, cwc, cwc_link);
free((void *)cwc->cwc_password);
free((void *)cwc->cwc_password_salted);
free((void *)cwc->cwc_username);
tcp_destroy_client(&cwc->cwc_tcp_session);
}
/**
*
*/
static cwc_t *
cwc_entry_find(const char *id, int create)
{
char buf[20];
cwc_t *cwc;
if(id != NULL) {
TAILQ_FOREACH(cwc, &cwcs, cwc_link)
if(!strcmp(cwc->cwc_id, id))
return cwc;
}
if(create == 0)
return NULL;
if(id == NULL) {
cwc_tally++;
snprintf(buf, sizeof(buf), "%d", cwc_tally);
id = buf;
} else {
cwc_tally = atoi(id);
}
cwc = tcp_create_client(NULL, 11000, sizeof(cwc_t),
"cwc", cwc_tcp_callback, 0);
cwc->cwc_id = strdup(id);
cwc->cwc_username = NULL;
cwc->cwc_password = NULL;
TAILQ_INSERT_TAIL(&cwcs, cwc, cwc_link);
return cwc;
}
/**
*
*/
static htsmsg_t *
cwc_record_build(cwc_t *cwc)
{
htsmsg_t *e = htsmsg_create();
char buf[100];
htsmsg_add_str(e, "id", cwc->cwc_id);
htsmsg_add_u32(e, "enabled", !!cwc->cwc_enabled);
htsmsg_add_str(e, "hostname", cwc->cwc_tcp_session.tcp_hostname ?: "");
htsmsg_add_u32(e, "port", cwc->cwc_tcp_session.tcp_port);
htsmsg_add_str(e, "username", cwc->cwc_username ?: "");
htsmsg_add_str(e, "password", cwc->cwc_password ?: "");
snprintf(buf, sizeof(buf),
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:"
"%02x:%02x:%02x:%02x:%02x:%02x:%02x",
cwc->cwc_confedkey[0x0],
cwc->cwc_confedkey[0x1],
cwc->cwc_confedkey[0x2],
cwc->cwc_confedkey[0x3],
cwc->cwc_confedkey[0x4],
cwc->cwc_confedkey[0x5],
cwc->cwc_confedkey[0x6],
cwc->cwc_confedkey[0x7],
cwc->cwc_confedkey[0x8],
cwc->cwc_confedkey[0x9],
cwc->cwc_confedkey[0xa],
cwc->cwc_confedkey[0xb],
cwc->cwc_confedkey[0xc],
cwc->cwc_confedkey[0xd]);
htsmsg_add_str(e, "deskey", buf);
htsmsg_add_str(e, "comment", cwc->cwc_comment ?: "");
return e;
}
/**
*
*/
static int
nibble(char c)
{
switch(c) {
case '0' ... '9':
return c - '0';
case 'a' ... 'f':
return c - 'a' + 10;
case 'A' ... 'F':
return c - 'A' + 10;
default:
return 0;
}
}
/**
*
*/
static htsmsg_t *
cwc_entry_update(void *opaque, const char *id, htsmsg_t *values, int maycreate)
{
cwc_t *cwc;
const char *s;
uint32_t u32;
uint8_t key[14];
int u, l, i;
if((cwc = cwc_entry_find(id, maycreate)) == NULL)
return NULL;
/* Disable while changing */
tcp_enable_disable(&cwc->cwc_tcp_session, 0);
if((s = htsmsg_get_str(values, "username")) != NULL) {
free(cwc->cwc_username);
cwc->cwc_username = strdup(s);
}
if((s = htsmsg_get_str(values, "password")) != NULL) {
free(cwc->cwc_password);
free(cwc->cwc_password_salted);
cwc->cwc_password = strdup(s);
cwc->cwc_password_salted = strdup(cwc_krypt(s, "$1$abcdefgh$"));
}
if((s = htsmsg_get_str(values, "comment")) != NULL) {
free(cwc->cwc_comment);
cwc->cwc_comment = strdup(s);
}
if((s = htsmsg_get_str(values, "hostname")) != NULL) {
tcp_set_hostname(&cwc->cwc_tcp_session, s);
}
if(!htsmsg_get_u32(values, "enabled", &u32))
cwc->cwc_enabled = u32;
if(!htsmsg_get_u32(values, "port", &u32))
cwc->cwc_tcp_session.tcp_port = u32;
if((s = htsmsg_get_str(values, "deskey")) != NULL) {
for(i = 0; i < 14; i++) {
while(*s != 0 && !isxdigit(*s)) s++;
if(*s == 0)
break;
u = nibble(*s++);
while(*s != 0 && !isxdigit(*s)) s++;
if(*s == 0)
break;
l = nibble(*s++);
key[i] = (u << 4) | l;
}
memcpy(cwc->cwc_confedkey, key, 14);
}
if(cwc->cwc_enabled)
tcp_enable_disable(&cwc->cwc_tcp_session, 1);
return cwc_record_build(cwc);
}
/**
*
*/
static int
cwc_entry_delete(void *opaque, const char *id)
{
cwc_t *cwc;
if((cwc = cwc_entry_find(id, 0)) == NULL)
return -1;
cwc_destroy(cwc);
return 0;
}
/**
*
*/
static htsmsg_t *
cwc_entry_get_all(void *opaque)
{
htsmsg_t *r = htsmsg_create_array();
cwc_t *cwc;
TAILQ_FOREACH(cwc, &cwcs, cwc_link)
htsmsg_add_msg(r, NULL, cwc_record_build(cwc));
return r;
}
/**
*
*/
static htsmsg_t *
cwc_entry_get(void *opaque, const char *id)
{
cwc_t *cwc;
if((cwc = cwc_entry_find(id, 0)) == NULL)
return NULL;
return cwc_record_build(cwc);
}
/**
*
*/
/**
*
*/
static htsmsg_t *
cwc_entry_create(void *opaque)
{
return cwc_record_build(cwc_entry_find(NULL, 1));
}
/**
*
*/
static const dtable_class_t cwc_dtc = {
.dtc_record_get = cwc_entry_get,
.dtc_record_get_all = cwc_entry_get_all,
.dtc_record_create = cwc_entry_create,
.dtc_record_update = cwc_entry_update,
.dtc_record_delete = cwc_entry_delete,
};
/**
*
*/
void
cwc_init(void)
{
dtable_t *dt;
TAILQ_INIT(&cwcs);
dt = dtable_create(&cwc_dtc, "cwc", NULL);
dtable_load(dt);
}
/**
*
*/
static struct strtab cwcstatustab[] = {
{ "Waiting for login key", CWC_STATE_WAIT_LOGIN_KEY },
{ "Waiting for login ACK", CWC_STATE_WAIT_LOGIN_ACK },
{ "Waiting for card data", CWC_STATE_WAIT_CARD_DATA },
{ "Running", CWC_STATE_RUNNING },
};
const char *
cwc_status_to_text(struct cwc *cwc)
{
static char buf[100];
char buf2[30];
const char *n;
if(cwc->cwc_state == CWC_STATE_IDLE)
return cwc->cwc_errtxt ?: "Not connected";
if(cwc->cwc_state == CWC_STATE_RUNNING) {
n = psi_caid2name(cwc->cwc_caid);
if(n == NULL) {
snprintf(buf2, sizeof(buf2), "0x%x", cwc->cwc_caid);
n = buf2;
}
snprintf(buf, sizeof(buf), "Connected to a %s card", n);
return buf;
}
return val2str(cwc->cwc_state, cwcstatustab) ?: "Invalid status";
}
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