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tg/structures.c

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/*
This file is part of telegram-client.
Telegram-client 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.
Telegram-client 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 telegram-client. If not, see <http://www.gnu.org/licenses/>.
Copyright Vitaly Valtman 2013
*/
#include <assert.h>
#include <string.h>
#include "structures.h"
#include "mtproto-common.h"
#include "telegram.h"
#include "tree.h"
#include "loop.h"
#include <openssl/rand.h>
#include <openssl/aes.h>
#include <openssl/sha.h>
#define sha1 SHA1
int verbosity;
peer_t *Peers[MAX_USER_NUM];
int peer_num;
int encr_chats_allocated;
int geo_chats_allocated;
void fetch_file_location (struct file_location *loc) {
int x = fetch_int ();
if (x == CODE_file_location_unavailable) {
loc->dc = -1;
loc->volume = fetch_long ();
loc->local_id = fetch_int ();
loc->secret = fetch_long ();
} else {
assert (x == CODE_file_location);
loc->dc = fetch_int ();;
loc->volume = fetch_long ();
loc->local_id = fetch_int ();
loc->secret = fetch_long ();
}
}
void fetch_user_status (struct user_status *S) {
int x = fetch_int ();
switch (x) {
case CODE_user_status_empty:
S->online = 0;
break;
case CODE_user_status_online:
S->online = 1;
S->when = fetch_int ();
break;
case CODE_user_status_offline:
S->online = -1;
S->when = fetch_int ();
break;
default:
assert (0);
}
}
int our_id;
char *create_print_name (peer_id_t id, const char *a1, const char *a2, const char *a3, const char *a4) {
const char *d[4];
d[0] = a1; d[1] = a2; d[2] = a3; d[3] = a4;
static char buf[10000];
int i;
int p = 0;
for (i = 0; i < 4; i++) {
if (d[i] && strlen (d[i])) {
p += snprintf (buf + p, 9999 - p, "%s%s", p ? "_" : "", d[i]);
assert (p < 9990);
}
}
char *s = buf;
while (*s) {
if (*s == ' ') { *s = '_'; }
s++;
}
s = buf;
int cc = 0;
while (1) {
int ok = 1;
int i;
for (i = 0; i < peer_num; i++) {
if (cmp_peer_id (Peers[i]->id, id) && Peers[i]->print_name && !strcmp (Peers[i]->print_name, s)) {
ok = 0;
break;
}
}
if (ok) {
break;
}
cc ++;
assert (cc <= 99);
if (cc == 1) {
int l = strlen (s);
s[l + 2] = 0;
s[l] = '#';
s[l + 1] = '1';
} else if (cc == 10) {
int l = strlen (s);
s[l + 1] = 0;
s[l] = '0';
s[l - 1] = '1';
} else {
int l = strlen (s);
s[l - 1] ++;
int cc = l - 1;
while (s[cc] > '9') {
s[cc] = '0';
s[cc - 1] ++;
cc --;
}
}
}
return strdup (s);
}
void fetch_user (struct user *U) {
unsigned x = fetch_int ();
assert (x == CODE_user_empty || x == CODE_user_self || x == CODE_user_contact || x == CODE_user_request || x == CODE_user_foreign || x == CODE_user_deleted);
U->id = MK_USER (fetch_int ());
U->flags &= ~(FLAG_EMPTY | FLAG_DELETED | FLAG_USER_SELF | FLAG_USER_FOREIGN | FLAG_USER_CONTACT);
if (x == CODE_user_empty) {
U->flags |= FLAG_EMPTY;
return;
}
if (x == CODE_user_self) {
assert (!our_id || (our_id == get_peer_id (U->id)));
if (!our_id) {
our_id = get_peer_id (U->id);
write_auth_file ();
}
}
if (U->first_name) { free (U->first_name); }
if (U->last_name) { free (U->last_name); }
if (U->print_name) { free (U->print_name); }
U->first_name = fetch_str_dup ();
U->last_name = fetch_str_dup ();
U->print_name = create_print_name (U->id, U->first_name, U->last_name, 0, 0);
if (x == CODE_user_deleted) {
U->flags |= FLAG_DELETED;
return;
}
if (x == CODE_user_self) {
U->flags |= FLAG_USER_SELF;
} else {
U->access_hash = fetch_long ();
}
if (x == CODE_user_foreign) {
U->flags |= FLAG_USER_FOREIGN;
U->phone = 0;
} else {
if (U->phone) { free (U->phone); }
U->phone = fetch_str_dup ();
}
//logprintf ("name = %s, surname = %s, phone = %s\n", U->first_name, U->last_name, U->phone);
unsigned y = fetch_int ();
//fprintf (stderr, "y = 0x%08x\n", y);
if (y == CODE_user_profile_photo_empty) {
U->photo_small.dc = -2;
U->photo_big.dc = -2;
} else {
assert (y == CODE_user_profile_photo || y == 0x990d1493);
if (y == CODE_user_profile_photo) {
fetch_long ();
}
fetch_file_location (&U->photo_small);
fetch_file_location (&U->photo_big);
}
fetch_user_status (&U->status);
if (x == CODE_user_self) {
fetch_bool ();
}
if (x == CODE_user_contact) {
U->flags |= FLAG_USER_CONTACT;
}
}
void fetch_encrypted_chat (struct secret_chat *U) {
unsigned x = fetch_int ();
assert (x == CODE_encrypted_chat_empty || x == CODE_encrypted_chat_waiting || x == CODE_encrypted_chat_requested || x == CODE_encrypted_chat || x == CODE_encrypted_chat_discarded);
U->id = MK_ENCR_CHAT (fetch_int ());
U->flags &= ~(FLAG_EMPTY | FLAG_DELETED);
enum secret_chat_state old_state = U->state;
if (x == CODE_encrypted_chat_empty) {
U->state = sc_none;
U->flags |= FLAG_EMPTY;
if (U->state != old_state) {
write_secret_chat_file ();
}
return;
}
if (x == CODE_encrypted_chat_discarded) {
U->state = sc_deleted;
U->flags |= FLAG_DELETED;
if (U->state != old_state) {
write_secret_chat_file ();
}
return;
}
U->access_hash = fetch_long ();
U->date = fetch_int ();
U->admin_id = fetch_int ();
U->user_id = fetch_int () + U->admin_id - our_id;
if (U->print_name) { free (U->print_name); }
peer_t *P = user_chat_get (MK_USER (U->user_id));
if (P) {
U->print_name = create_print_name (U->id, "!", P->user.first_name, P->user.last_name, 0);
} else {
static char buf[100];
sprintf (buf, "user#%d", U->user_id);
U->print_name = create_print_name (U->id, "!", buf, 0, 0);
}
if (x == CODE_encrypted_chat_waiting) {
U->state = sc_waiting;
} else if (x == CODE_encrypted_chat_requested) {
U->state = sc_request;
if (!U->g_key) {
U->g_key = malloc (256);
}
memset (U->g_key, 0, 256);
if (!U->nonce) {
U->nonce = malloc (256);
}
memset (U->nonce, 0, 256);
int l = prefetch_strlen ();
char *s = fetch_str (l);
if (l < 256) {
memcpy (U->g_key + 256 - l, s, l);
} else {
memcpy (U->g_key, s + (l - 256), 256);
}
l = prefetch_strlen ();
s = fetch_str (l);
if (l < 256) {
memcpy (U->nonce + 256 - l, s, l);
} else {
memcpy (U->nonce, s + (l - 256), 256);
}
} else {
U->state = sc_ok;
if (!U->g_key) {
U->g_key = malloc (256);
}
memset (U->g_key, 0, 256);
if (!U->nonce) {
U->nonce = malloc (256);
}
memset (U->nonce, 0, 256);
int l = prefetch_strlen ();
char *s = fetch_str (l);
if (l < 256) {
memcpy (U->g_key + 256 - l, s, l);
} else {
memcpy (U->g_key, s + (l - 256), 256);
}
l = prefetch_strlen ();
s = fetch_str (l);
if (l < 256) {
memcpy (U->nonce + 256 - l, s, l);
} else {
memcpy (U->nonce, s + (l - 256), 256);
}
if (!U->key_fingerprint) {
U->key_fingerprint = fetch_long ();
} else {
assert (U->key_fingerprint == fetch_long ());
}
}
if (U->state != old_state) {
write_secret_chat_file ();
}
}
void fetch_notify_settings (void);
void fetch_user_full (struct user *U) {
assert (fetch_int () == CODE_user_full);
fetch_alloc_user ();
unsigned x;
assert (fetch_int () == (int)CODE_contacts_link);
x = fetch_int ();
assert (x == CODE_contacts_my_link_empty || x == CODE_contacts_my_link_requested || x == CODE_contacts_my_link_contact);
U->flags &= ~(FLAG_USER_IN_CONTACT | FLAG_USER_OUT_CONTACT);
if (x == CODE_contacts_my_link_contact) {
U->flags |= FLAG_USER_IN_CONTACT;
}
if (x == CODE_contacts_my_link_requested) {
fetch_bool ();
}
x = fetch_int ();
assert (x == CODE_contacts_foreign_link_unknown || x == CODE_contacts_foreign_link_requested || x == CODE_contacts_foreign_link_mutual);
U->flags &= ~(FLAG_USER_IN_CONTACT | FLAG_USER_OUT_CONTACT);
if (x == CODE_contacts_foreign_link_mutual) {
U->flags |= FLAG_USER_IN_CONTACT | FLAG_USER_OUT_CONTACT;
}
if (x == CODE_contacts_foreign_link_requested) {
U->flags |= FLAG_USER_OUT_CONTACT;
fetch_bool ();
}
fetch_alloc_user ();
if (U->flags & FLAG_HAS_PHOTO) {
free_photo (&U->photo);
}
fetch_photo (&U->photo);
fetch_notify_settings ();
U->blocked = fetch_int ();
if (U->real_first_name) { free (U->real_first_name); }
if (U->real_last_name) { free (U->real_last_name); }
U->real_first_name = fetch_str_dup ();
U->real_last_name = fetch_str_dup ();
}
void fetch_chat (struct chat *C) {
unsigned x = fetch_int ();
assert (x == CODE_chat_empty || x == CODE_chat || x == CODE_chat_forbidden);
C->id = MK_CHAT (fetch_int ());
C->flags &= ~(FLAG_EMPTY | FLAG_DELETED | FLAG_FORBIDDEN | FLAG_CHAT_IN_CHAT);
if (x == CODE_chat_empty) {
C->flags |= FLAG_EMPTY;
return;
}
if (x == CODE_chat_forbidden) {
C->flags |= FLAG_FORBIDDEN;
}
if (C->title) { free (C->title); }
if (C->print_title) { free (C->print_title); }
C->title = fetch_str_dup ();
C->print_title = create_print_name (C->id, C->title, 0, 0, 0);
if (x == CODE_chat) {
unsigned y = fetch_int ();
if (y == CODE_chat_photo_empty) {
C->photo_small.dc = -2;
C->photo_big.dc = -2;
} else {
assert (y == CODE_chat_photo);
fetch_file_location (&C->photo_small);
fetch_file_location (&C->photo_big);
}
C->users_num = fetch_int ();
C->date = fetch_int ();
if (fetch_int () == (int)CODE_bool_true) {
C->flags |= FLAG_CHAT_IN_CHAT;
}
C->version = fetch_int ();
} else {
C->photo_small.dc = -2;
C->photo_big.dc = -2;
C->users_num = -1;
C->date = fetch_int ();
C->version = -1;
}
}
void fetch_notify_settings (void) {
unsigned x = fetch_int ();
assert (x == CODE_peer_notify_settings || x == CODE_peer_notify_settings_empty || x == CODE_peer_notify_settings_old);
if (x == CODE_peer_notify_settings_old) {
fetch_int (); // mute_until
int l = prefetch_strlen ();
fetch_str (l);
fetch_bool (); // show_previews
fetch_int (); // peer notify events
}
if (x == CODE_peer_notify_settings) {
fetch_int (); // mute_until
int l = prefetch_strlen ();
fetch_str (l);
fetch_bool (); // show_previews
fetch_int (); // events_mask
}
}
void fetch_chat_full (struct chat *C) {
unsigned x = fetch_int ();
assert (x == CODE_messages_chat_full);
assert (fetch_int () == CODE_chat_full);
C->id = MK_CHAT (fetch_int ());
C->flags &= ~(FLAG_EMPTY | FLAG_DELETED | FLAG_FORBIDDEN | FLAG_CHAT_IN_CHAT);
x = fetch_int ();
if (x == CODE_chat_participants) {
assert (fetch_int () == get_peer_id (C->id));
C->admin_id = fetch_int ();
assert (fetch_int () == CODE_vector);
if (C->users) {
free (C->users);
}
C->users_num = fetch_int ();
C->users = malloc (sizeof (struct chat_user) * C->users_num);
int i;
for (i = 0; i < C->users_num; i++) {
assert (fetch_int () == (int)CODE_chat_participant);
C->users[i].user_id = fetch_int ();
C->users[i].inviter_id = fetch_int ();
C->users[i].date = fetch_int ();
}
C->version = fetch_int ();
} else {
C->flags |= FLAG_FORBIDDEN;
assert (x == CODE_chat_participants_forbidden);
}
if (C->flags & FLAG_HAS_PHOTO) {
free_photo (&C->photo);
}
fetch_photo (&C->photo);
C->flags |= FLAG_HAS_PHOTO;
fetch_notify_settings ();
int n, i;
assert (fetch_int () == CODE_vector);
n = fetch_int ();
for (i = 0; i < n; i++) {
fetch_alloc_chat ();
}
assert (fetch_int () == CODE_vector);
n = fetch_int ();
for (i = 0; i < n; i++) {
fetch_alloc_user ();
}
}
void fetch_photo_size (struct photo_size *S) {
memset (S, 0, sizeof (*S));
unsigned x = fetch_int ();
assert (x == CODE_photo_size || x == CODE_photo_cached_size || x == CODE_photo_size_empty);
S->type = fetch_str_dup ();
if (x != CODE_photo_size_empty) {
fetch_file_location (&S->loc);
S->w = fetch_int ();
S->h = fetch_int ();
if (x == CODE_photo_size) {
S->size = fetch_int ();
} else {
S->size = prefetch_strlen ();
S->data = malloc (S->size);
memcpy (S->data, fetch_str (S->size), S->size);
}
}
}
void fetch_geo (struct geo *G) {
unsigned x = fetch_int ();
if (x == CODE_geo_point) {
G->longitude = fetch_double ();
G->latitude = fetch_double ();
} else {
assert (x == CODE_geo_point_empty);
G->longitude = 0;
G->latitude = 0;
}
}
void fetch_photo (struct photo *P) {
memset (P, 0, sizeof (*P));
unsigned x = fetch_int ();
assert (x == CODE_photo_empty || x == CODE_photo);
P->id = fetch_long ();
if (x == CODE_photo_empty) { return; }
P->access_hash = fetch_long ();
P->user_id = fetch_int ();
P->date = fetch_int ();
P->caption = fetch_str_dup ();
fetch_geo (&P->geo);
assert (fetch_int () == CODE_vector);
P->sizes_num = fetch_int ();
P->sizes = malloc (sizeof (struct photo_size) * P->sizes_num);
int i;
for (i = 0; i < P->sizes_num; i++) {
fetch_photo_size (&P->sizes[i]);
}
}
void fetch_video (struct video *V) {
memset (V, 0, sizeof (*V));
unsigned x = fetch_int ();
V->id = fetch_long ();
if (x == CODE_video_empty) { return; }
V->access_hash = fetch_long ();
V->user_id = fetch_int ();
V->date = fetch_int ();
V->caption = fetch_str_dup ();
V->duration = fetch_int ();
V->size = fetch_int ();
fetch_photo_size (&V->thumb);
V->dc_id = fetch_int ();
V->w = fetch_int ();
V->h = fetch_int ();
}
void fetch_message_action (struct message_action *M) {
memset (M, 0, sizeof (*M));
unsigned x = fetch_int ();
M->type = x;
switch (x) {
case CODE_message_action_empty:
break;
case CODE_message_action_chat_create:
M->title = fetch_str_dup ();
assert (fetch_int () == (int)CODE_vector);
M->user_num = fetch_int ();
M->users = malloc (M->user_num * 4);
fetch_ints (M->users, M->user_num);
break;
case CODE_message_action_chat_edit_title:
M->new_title = fetch_str_dup ();
break;
case CODE_message_action_chat_edit_photo:
fetch_photo (&M->photo);
break;
case CODE_message_action_chat_delete_photo:
break;
case CODE_message_action_chat_add_user:
M->user = fetch_int ();
break;
case CODE_message_action_chat_delete_user:
M->user = fetch_int ();
break;
default:
assert (0);
}
}
void fetch_message_short (struct message *M) {
memset (M, 0, sizeof (*M));
M->id = fetch_int ();
M->to_id = MK_USER (our_id);
M->from_id = MK_USER (fetch_int ());
M->message = fetch_str_dup ();
fetch_pts ();
M->date = fetch_int ();
fetch_seq ();
M->media.type = CODE_message_media_empty;
M->unread = 1;
}
void fetch_message_short_chat (struct message *M) {
memset (M, 0, sizeof (*M));
M->id = fetch_int ();
M->from_id = MK_USER (fetch_int ());
M->to_id = MK_CHAT (fetch_int ());
M->message = fetch_str_dup ();
fetch_pts ();
M->date = fetch_int ();
fetch_seq ();
M->media.type = CODE_message_media_empty;
M->unread = 1;
}
void fetch_message_media (struct message_media *M) {
memset (M, 0, sizeof (*M));
M->type = fetch_int ();
switch (M->type) {
case CODE_message_media_empty:
break;
case CODE_message_media_photo:
fetch_photo (&M->photo);
break;
case CODE_message_media_video:
fetch_video (&M->video);
break;
case CODE_message_media_geo:
fetch_geo (&M->geo);
break;
case CODE_message_media_contact:
M->phone = fetch_str_dup ();
M->first_name = fetch_str_dup ();
M->last_name = fetch_str_dup ();
M->user_id = fetch_int ();
break;
case CODE_message_media_unsupported:
M->data = fetch_str_dup ();
break;
default:
logprintf ("type = 0x%08x\n", M->type);
assert (0);
}
}
void fetch_message_media_encrypted (struct message_media *M) {
memset (M, 0, sizeof (*M));
unsigned x = fetch_int ();
int l;
switch (x) {
case CODE_decrypted_message_media_empty:
M->type = CODE_message_media_empty;
break;
case CODE_decrypted_message_media_photo:
M->type = x;
l = prefetch_strlen ();
fetch_str (l); // thumb
fetch_int (); // thumb_w
fetch_int (); // thumb_h
M->encr_photo.w = fetch_int ();
M->encr_photo.h = fetch_int ();
M->encr_photo.size = fetch_int ();
l = prefetch_strlen ();
assert (l > 0);
M->encr_photo.key = malloc (32);
memset (M->encr_photo.key, 0, 32);
if (l <= 32) {
memcpy (M->encr_photo.key + (32 - l), fetch_str (l), l);
} else {
memcpy (M->encr_photo.key, fetch_str (l) + (l - 32), 32);
}
M->encr_photo.iv = malloc (32);
l = prefetch_strlen ();
assert (l > 0);
memset (M->encr_photo.iv, 0, 32);
if (l <= 32) {
memcpy (M->encr_photo.iv + (32 - l), fetch_str (l), l);
} else {
memcpy (M->encr_photo.iv, fetch_str (l) + (l - 32), 32);
}
break;
case CODE_decrypted_message_media_video:
M->type = x;
l = prefetch_strlen ();
fetch_str (l); // thumb
fetch_int (); // thumb_w
fetch_int (); // thumb_h
M->encr_video.w = fetch_int ();
M->encr_video.h = fetch_int ();
M->encr_video.size = fetch_int ();
M->encr_video.duration = fetch_int ();
l = prefetch_strlen ();
assert (l > 0);
M->encr_video.key = malloc (32);
memset (M->encr_photo.key, 0, 32);
if (l <= 32) {
memcpy (M->encr_video.key + (32 - l), fetch_str (l), l);
} else {
memcpy (M->encr_video.key, fetch_str (l) + (l - 32), 32);
}
M->encr_video.iv = malloc (32);
l = prefetch_strlen ();
assert (l > 0);
memset (M->encr_video.iv, 0, 32);
if (l <= 32) {
memcpy (M->encr_video.iv + (32 - l), fetch_str (l), l);
} else {
memcpy (M->encr_video.iv, fetch_str (l) + (l - 32), 32);
}
break;
/* case CODE_decrypted_message_media_file:
M->type = x;
M->encr_file.filename = fetch_str_dup ();
l = prefetch_strlen ();
fetch_str (l); // thumb
l = fetch_int ();
assert (l > 0);
M->encr_file.key = malloc (l);
memcpy (M->encr_file.key, fetch_str (l), l);
l = fetch_int ();
assert (l > 0);
M->encr_file.iv = malloc (l);
memcpy (M->encr_file.iv, fetch_str (l), l);
break;
*/
case CODE_decrypted_message_media_geo_point:
M->geo.longitude = fetch_double ();
M->geo.latitude = fetch_double ();
M->type = CODE_message_media_geo;
break;
case CODE_decrypted_message_media_contact:
M->type = CODE_message_media_contact;
M->phone = fetch_str_dup ();
M->first_name = fetch_str_dup ();
M->last_name = fetch_str_dup ();
M->user_id = fetch_int ();
break;
default:
logprintf ("type = 0x%08x\n", M->type);
assert (0);
}
}
peer_id_t fetch_peer_id (void) {
unsigned x =fetch_int ();
if (x == CODE_peer_user) {
return MK_USER (fetch_int ());
} else {
assert (CODE_peer_chat);
return MK_CHAT (fetch_int ());
}
}
void fetch_message (struct message *M) {
memset (M, 0, sizeof (*M));
unsigned x = fetch_int ();
assert (x == CODE_message_empty || x == CODE_message || x == CODE_message_forwarded || x == CODE_message_service);
M->id = fetch_int ();
if (x == CODE_message_empty) {
M->flags |= 1;
return;
}
if (x == CODE_message_forwarded) {
M->fwd_from_id = MK_USER (fetch_int ());
M->fwd_date = fetch_int ();
}
M->from_id = MK_USER (fetch_int ());
M->to_id = fetch_peer_id ();
M->out = fetch_bool ();
M->unread = fetch_bool ();
M->date = fetch_int ();
if (x == CODE_message_service) {
M->service = 1;
fetch_message_action (&M->action);
} else {
M->message = fetch_str_dup ();
fetch_message_media (&M->media);
}
}
void fetch_geo_message (struct message *M) {
memset (M, 0, sizeof (*M));
unsigned x = fetch_int ();
assert (x == CODE_geo_chat_message_empty || x == CODE_geo_chat_message || x == CODE_geo_chat_message_service);
M->to_id = MK_GEO_CHAT (fetch_int ());
M->id = fetch_int ();
if (x == CODE_geo_chat_message_empty) {
M->flags |= 1;
return;
}
M->from_id = MK_USER (fetch_int ());
M->date = fetch_int ();
if (x == CODE_geo_chat_message_service) {
M->service = 1;
fetch_message_action (&M->action);
} else {
M->message = fetch_str_dup ();
fetch_message_media (&M->media);
}
}
int *decr_ptr;
int *decr_end;
int decrypt_encrypted_message (struct secret_chat *E) {
int *msg_key = decr_ptr;
decr_ptr += 4;
assert (decr_ptr < decr_end);
static unsigned char sha1a_buffer[20];
static unsigned char sha1b_buffer[20];
static unsigned char sha1c_buffer[20];
static unsigned char sha1d_buffer[20];
static unsigned char buf[64];
memcpy (buf, msg_key, 16);
memcpy (buf + 16, E->key, 32);
sha1 (buf, 48, sha1a_buffer);
memcpy (buf, E->key + 8, 16);
memcpy (buf + 16, msg_key, 16);
memcpy (buf + 32, E->key + 12, 16);
sha1 (buf, 48, sha1b_buffer);
memcpy (buf, E->key + 16, 32);
memcpy (buf + 32, msg_key, 16);
sha1 (buf, 48, sha1c_buffer);
memcpy (buf, msg_key, 16);
memcpy (buf + 16, E->key + 24, 32);
sha1 (buf, 48, sha1d_buffer);
static unsigned char key[32];
memcpy (key, sha1a_buffer + 0, 8);
memcpy (key + 8, sha1b_buffer + 8, 12);
memcpy (key + 20, sha1c_buffer + 4, 12);
static unsigned char iv[32];
memcpy (iv, sha1a_buffer + 8, 12);
memcpy (iv + 12, sha1b_buffer + 0, 8);
memcpy (iv + 20, sha1c_buffer + 16, 4);
memcpy (iv + 24, sha1d_buffer + 0, 8);
AES_KEY aes_key;
AES_set_decrypt_key (key, 256, &aes_key);
AES_ige_encrypt ((void *)decr_ptr, (void *)decr_ptr, 4 * (decr_end - decr_ptr), &aes_key, iv, 0);
int x = *(decr_ptr);
assert (x >= 0 && !(x & 3));
sha1 ((void *)decr_ptr, 4 + x, sha1a_buffer);
if (memcmp (sha1a_buffer + 4, msg_key, 16)) {
logprintf ("Sha1 mismatch\n");
return -1;
}
return 0;
}
void fetch_encrypted_message (struct message *M) {
memset (M, 0, sizeof (*M));
unsigned x = fetch_int ();
assert (x == CODE_encrypted_message || x == CODE_encrypted_message_service);
unsigned sx = x;
M->id = fetch_long ();
peer_id_t chat = MK_ENCR_CHAT (fetch_int ());
M->to_id = chat;
peer_t *P = user_chat_get (chat);
M->flags &= ~(FLAG_EMPTY | FLAG_DELETED);
M->flags |= FLAG_ENCRYPTED;
if (!P) {
logprintf ("Encrypted message to unknown chat. Dropping\n");
M->flags |= FLAG_EMPTY;
}
M->date = fetch_int ();
int len = prefetch_strlen ();
assert ((len & 15) == 8);
decr_ptr = (void *)fetch_str (len);
decr_end = decr_ptr + (len / 4);
M->flags |= FLAG_ENCRYPTED;
int ok = 0;
if (P) {
if (*(long long *)decr_ptr != P->encr_chat.key_fingerprint) {
logprintf ("Encrypted message with bad fingerprint to chat %s\n", P->print_name);
P = 0;
}
decr_ptr += 2;
}
if (P && decrypt_encrypted_message (&P->encr_chat) >= 0) {
ok = 1;
int *save_in_ptr = in_ptr;
int *save_in_end = in_end;
in_ptr = decr_ptr;
int l = fetch_int ();
in_end = in_ptr + l;
unsigned x = fetch_int ();
if (x == CODE_decrypted_message_layer) {
int layer = fetch_int ();
assert (layer >= 0);
x = fetch_int ();
}
assert (x == CODE_decrypted_message || x == CODE_decrypted_message_service);
assert (M->id = fetch_long ());
l = prefetch_strlen ();
fetch_str (l); // random_bytes
if (x == CODE_decrypted_message) {
M->message = fetch_str_dup ();
fetch_message_media_encrypted (&M->media);
} else {
assert (fetch_int () == (int)CODE_decrypted_message_action_set_message_t_t_l);
P->encr_chat.ttl = fetch_int ();
M->service = 1;
}
in_ptr = save_in_ptr;
in_end = save_in_end;
}
if (sx == CODE_encrypted_message) {
if (ok) {
fetch_encrypted_message_file (&M->media);
} else {
x = fetch_int ();
if (x == CODE_encrypted_file) {
fetch_skip (7);
} else {
assert (x == CODE_encrypted_file_empty);
}
M->media.type = CODE_message_media_empty;
}
}
}
void fetch_encrypted_message_file (struct message_media *M) {
unsigned x = fetch_int ();
assert (x == CODE_encrypted_file || x == CODE_encrypted_file_empty);
if (x == CODE_encrypted_file_empty) {
assert (M->type != CODE_decrypted_message_media_photo && M->type != CODE_decrypted_message_media_video);
} else {
assert (M->type == CODE_decrypted_message_media_photo || M->type == CODE_decrypted_message_media_video);
M->encr_photo.id = fetch_long ();
M->encr_photo.access_hash = fetch_long ();
fetch_int ();
//assert (M->encr_photo.size == fetch_int ());
//M->encr_photo.size = fetch_int (); // Why it is not the same?
M->encr_photo.dc_id = fetch_int ();
M->encr_photo.key_fingerprint = fetch_int ();
}
}
static int id_cmp (struct message *M1, struct message *M2) {
if (M1->id < M2->id) { return -1; }
else if (M1->id > M2->id) { return 1; }
else { return 0; }
}
#define peer_cmp(a,b) (cmp_peer_id (a->id, b->id))
DEFINE_TREE(peer,peer_t *,peer_cmp,0)
DEFINE_TREE(message,struct message *,id_cmp,0)
struct tree_peer *peer_tree;
struct tree_message *message_tree;
int users_allocated;
int chats_allocated;
int messages_allocated;
struct message message_list = {
.next_use = &message_list,
.prev_use = &message_list
};
struct user *fetch_alloc_user (void) {
int data[2];
prefetch_data (data, 8);
peer_t *U = user_chat_get (MK_USER (data[1]));
if (U) {
fetch_user (&U->user);
return &U->user;
} else {
users_allocated ++;
U = malloc (sizeof (*U));
memset (U, 0, sizeof (*U));
fetch_user (&U->user);
peer_tree = tree_insert_peer (peer_tree, U, lrand48 ());
Peers[peer_num ++] = U;
return &U->user;
}
}
struct secret_chat *fetch_alloc_encrypted_chat (void) {
int data[2];
prefetch_data (data, 8);
peer_t *U = user_chat_get (MK_ENCR_CHAT (data[1]));
if (U) {
fetch_encrypted_chat (&U->encr_chat);
return &U->encr_chat;
} else {
encr_chats_allocated ++;
U = malloc (sizeof (*U));
memset (U, 0, sizeof (*U));
fetch_encrypted_chat (&U->encr_chat);
peer_tree = tree_insert_peer (peer_tree, U, lrand48 ());
Peers[peer_num ++] = U;
return &U->encr_chat;
}
}
void insert_encrypted_chat (peer_t *P) {
encr_chats_allocated ++;
peer_tree = tree_insert_peer (peer_tree, P, lrand48 ());
Peers[peer_num ++] = P;
}
struct user *fetch_alloc_user_full (void) {
int data[3];
prefetch_data (data, 12);
peer_t *U = user_chat_get (MK_USER (data[2]));
if (U) {
fetch_user_full (&U->user);
return &U->user;
} else {
users_allocated ++;
U = malloc (sizeof (*U));
memset (U, 0, sizeof (*U));
U->id = MK_USER (data[2]);
peer_tree = tree_insert_peer (peer_tree, U, lrand48 ());
fetch_user_full (&U->user);
Peers[peer_num ++] = U;
return &U->user;
}
}
void free_user (struct user *U) {
if (U->first_name) { free (U->first_name); }
if (U->last_name) { free (U->last_name); }
if (U->print_name) { free (U->print_name); }
if (U->phone) { free (U->phone); }
}
void free_photo_size (struct photo_size *S) {
free (S->type);
if (S->data) {
free (S->data);
}
}
void free_photo (struct photo *P) {
if (!P->access_hash) { return; }
if (P->caption) { free (P->caption); }
if (P->sizes) {
int i;
for (i = 0; i < P->sizes_num; i++) {
free_photo_size (&P->sizes[i]);
}
free (P->sizes);
}
}
void free_video (struct video *V) {
if (!V->access_hash) { return; }
free (V->caption);
free_photo_size (&V->thumb);
}
void free_message_media (struct message_media *M) {
switch (M->type) {
case CODE_message_media_empty:
case CODE_message_media_geo:
return;
case CODE_message_media_photo:
free_photo (&M->photo);
return;
case CODE_message_media_video:
free_video (&M->video);
return;
case CODE_message_media_contact:
free (M->phone);
free (M->first_name);
free (M->last_name);
return;
case CODE_message_media_unsupported:
free (M->data);
return;
case CODE_decrypted_message_media_photo:
free (M->encr_photo.key);
free (M->encr_photo.iv);
return;
case CODE_decrypted_message_media_video:
free (M->encr_video.key);
free (M->encr_video.iv);
return;
case 0:
break;
default:
logprintf ("%08x\n", M->type);
assert (0);
}
}
void free_message_action (struct message_action *M) {
switch (M->type) {
case CODE_message_action_empty:
break;
case CODE_message_action_chat_create:
free (M->title);
free (M->users);
break;
case CODE_message_action_chat_edit_title:
free (M->new_title);
break;
case CODE_message_action_chat_edit_photo:
free_photo (&M->photo);
break;
case CODE_message_action_chat_delete_photo:
break;
case CODE_message_action_chat_add_user:
break;
case CODE_message_action_chat_delete_user:
break;
case 0:
break;
default:
assert (0);
}
}
void free_message (struct message *M) {
if (!M->service) {
if (M->message) { free (M->message); }
free_message_media (&M->media);
} else {
free_message_action (&M->action);
}
}
void message_del_use (struct message *M) {
M->next_use->prev_use = M->prev_use;
M->prev_use->next_use = M->next_use;
}
void message_add_use (struct message *M) {
M->next_use = message_list.next_use;
M->prev_use = &message_list;
M->next_use->prev_use = M;
M->prev_use->next_use = M;
}
void message_add_peer (struct message *M) {
peer_id_t id;
if (!cmp_peer_id (M->to_id, MK_USER (our_id))) {
id = M->from_id;
} else {
id = M->to_id;
}
peer_t *P = user_chat_get (id);
if (!P) {
P = malloc (sizeof (*P));
memset (P, 0, sizeof (*P));
P->id = id;
P->flags = FLAG_EMPTY;
switch (get_peer_type (id)) {
case PEER_USER:
users_allocated ++;
break;
case PEER_CHAT:
chats_allocated ++;
break;
case PEER_GEO_CHAT:
geo_chats_allocated ++;
break;
case PEER_ENCR_CHAT:
encr_chats_allocated ++;
break;
}
peer_tree = tree_insert_peer (peer_tree, P, lrand48 ());
Peers[peer_num ++] = P;
}
M->next = P->last;
if (M->next) { M->next->prev = M; }
M->prev = 0;
P->last = M;
}
void message_del_peer (struct message *M) {
peer_id_t id;
if (!cmp_peer_id (M->to_id, MK_USER (our_id))) {
id = M->from_id;
} else {
id = M->to_id;
}
peer_t *P = user_chat_get (id);
if (M->prev) {
M->prev->next = M->next;
}
if (M->next) {
M->next->prev = M->prev;
}
if (P && P->last == M) {
P->last = M->next;
}
}
struct message *fetch_alloc_message (void) {
struct message *M = malloc (sizeof (*M));
fetch_message (M);
struct message *M1 = tree_lookup_message (message_tree, M);
messages_allocated ++;
if (M1) {
message_del_use (M1);
message_del_peer (M1);
free_message (M1);
memcpy (M1, M, sizeof (*M));
free (M);
message_add_use (M1);
message_add_peer (M1);
messages_allocated --;
return M1;
} else {
message_add_use (M);
message_add_peer (M);
message_tree = tree_insert_message (message_tree, M, lrand48 ());
return M;
}
}
struct message *fetch_alloc_geo_message (void) {
struct message *M = malloc (sizeof (*M));
fetch_geo_message (M);
struct message *M1 = tree_lookup_message (message_tree, M);
messages_allocated ++;
if (M1) {
message_del_use (M1);
message_del_peer (M1);
free_message (M1);
memcpy (M1, M, sizeof (*M));
free (M);
message_add_use (M1);
message_add_peer (M1);
messages_allocated --;
return M1;
} else {
message_add_use (M);
message_add_peer (M);
message_tree = tree_insert_message (message_tree, M, lrand48 ());
return M;
}
}
struct message *fetch_alloc_encrypted_message (void) {
struct message *M = malloc (sizeof (*M));
fetch_encrypted_message (M);
struct message *M1 = tree_lookup_message (message_tree, M);
messages_allocated ++;
if (M1) {
message_del_use (M1);
message_del_peer (M1);
free_message (M1);
memcpy (M1, M, sizeof (*M));
free (M);
message_add_use (M1);
message_add_peer (M1);
messages_allocated --;
return M1;
} else {
message_add_use (M);
message_add_peer (M);
message_tree = tree_insert_message (message_tree, M, lrand48 ());
return M;
}
}
struct message *fetch_alloc_message_short (void) {
struct message *M = malloc (sizeof (*M));
fetch_message_short (M);
struct message *M1 = tree_lookup_message (message_tree, M);
messages_allocated ++;
if (M1) {
message_del_use (M1);
message_del_peer (M1);
free_message (M1);
memcpy (M1, M, sizeof (*M));
free (M);
message_add_use (M1);
message_add_peer (M1);
messages_allocated --;
return M1;
} else {
message_add_use (M);
message_add_peer (M);
message_tree = tree_insert_message (message_tree, M, lrand48 ());
return M;
}
}
struct message *fetch_alloc_message_short_chat (void) {
struct message *M = malloc (sizeof (*M));
fetch_message_short_chat (M);
if (verbosity >= 2) {
logprintf ("Read message with id %lld\n", M->id);
}
struct message *M1 = tree_lookup_message (message_tree, M);
messages_allocated ++;
if (M1) {
message_del_use (M1);
message_del_peer (M1);
free_message (M1);
memcpy (M1, M, sizeof (*M));
free (M);
message_add_use (M1);
message_add_peer (M1);
messages_allocated --;
return M1;
} else {
message_add_use (M);
message_add_peer (M);
message_tree = tree_insert_message (message_tree, M, lrand48 ());
return M;
}
}
struct chat *fetch_alloc_chat (void) {
int data[2];
prefetch_data (data, 8);
peer_t *U = user_chat_get (MK_CHAT (data[1]));
if (U) {
fetch_chat (&U->chat);
return &U->chat;
} else {
chats_allocated ++;
U = malloc (sizeof (*U));
memset (U, 0, sizeof (*U));
fetch_chat (&U->chat);
peer_tree = tree_insert_peer (peer_tree, U, lrand48 ());
Peers[peer_num ++] = U;
return &U->chat;
}
}
struct chat *fetch_alloc_chat_full (void) {
int data[3];
prefetch_data (data, 12);
peer_t *U = user_chat_get (MK_CHAT (data[2]));
if (U) {
fetch_chat_full (&U->chat);
return &U->chat;
} else {
chats_allocated ++;
U = malloc (sizeof (*U));
memset (U, 0, sizeof (*U));
U->id = MK_CHAT (data[2]);
peer_tree = tree_insert_peer (peer_tree, U, lrand48 ());
fetch_chat_full (&U->chat);
Peers[peer_num ++] = U;
return &U->chat;
}
}
void free_chat (struct chat *U) {
if (U->title) { free (U->title); }
if (U->print_title) { free (U->print_title); }
}
int print_stat (char *s, int len) {
return snprintf (s, len,
"users_allocated\t%d\n"
"chats_allocated\t%d\n"
"secret_chats_allocated\t%d\n"
"peer_num\t%d\n"
"messages_allocated\t%d\n",
users_allocated,
chats_allocated,
encr_chats_allocated,
peer_num,
messages_allocated
);
}
peer_t *user_chat_get (peer_id_t id) {
peer_t U;
U.id = id;
return tree_lookup_peer (peer_tree, &U);
}
struct message *message_get (long long id) {
struct message M;
M.id = id;
return tree_lookup_message (message_tree, &M);
}
void update_message_id (struct message *M, long long id) {
message_tree = tree_delete_message (message_tree, M);
M->id = id;
message_tree = tree_insert_message (message_tree, M, lrand48 ());
}
void message_insert (struct message *M) {
message_add_use (M);
message_add_peer (M);
message_tree = tree_insert_message (message_tree, M, lrand48 ());
}
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