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safer string handling

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This commit is contained in:
Jfreegman 2014-10-03 17:53:50 -04:00
parent c56c6cc219
commit 23cf9686cb
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GPG Key ID: 3627F3144076AE63
12 changed files with 87 additions and 65 deletions
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17
src/chat.c
View File

@ -255,18 +255,13 @@ static void chat_onNickChange(ToxWindow *self, Tox *m, int32_t num, const char *
if (self->num != num)
return;
if (len > TOX_MAX_NAME_LENGTH)
return;
StatusBar *statusbar = self->stb;
char tmpname[TOX_MAX_NAME_LENGTH];
strcpy(tmpname, nick);
int n_len = MIN(len, TOXIC_MAX_NAME_LENGTH - 1);
tmpname[n_len] = '\0';
snprintf(statusbar->nick, sizeof(statusbar->nick), "%s", nick);
len = strlen(statusbar->nick);
statusbar->nick_len = len;
snprintf(statusbar->nick, sizeof(statusbar->nick), "%s", tmpname);
chat_set_window_name(self, tmpname, n_len);
chat_set_window_name(self, statusbar->nick, len);
}
static void chat_onStatusChange(ToxWindow *self, Tox *m, int32_t num, uint8_t status)
@ -581,7 +576,7 @@ static void chat_onGroupInvite(ToxWindow *self, Tox *m, int32_t friendnumber, co
Friends.list[friendnumber].group_invite.pending = true;
Friends.list[friendnumber].group_invite.length = length;
char name[TOX_MAX_NAME_LENGTH];
char name[TOX_MAX_NAME_LENGTH + 1];
get_nick_truncate(m, name, friendnumber);
sound_notify(self, generic_message, NT_WNDALERT_2, NULL);
@ -1087,7 +1082,7 @@ static void chat_onInit(ToxWindow *self, Tox *m)
snprintf(statusbar->statusmsg, sizeof(statusbar->statusmsg), "%s", statusmsg);
statusbar->statusmsg_len = s_len;
char nick[TOX_MAX_NAME_LENGTH];
char nick[TOX_MAX_NAME_LENGTH + 1];
int n_len = get_nick_truncate(m, nick, self->num);
snprintf(statusbar->nick, sizeof(statusbar->nick), "%s", nick);
statusbar->nick_len = n_len;

30
src/dns.c
View File

@ -47,7 +47,7 @@
#define TOX_DNS3_TXT_PREFIX "v=tox3;id="
extern struct Winthread Winthread;
extern struct _dns3_servers dns3_servers;
extern struct dns3_servers dns3_servers;
extern struct arg_opts arg_opts;
#define NUM_DNS3_BACKUP_SERVERS 2
@ -73,7 +73,7 @@ static struct dns3_server_backup {
},
};
static struct _thread_data {
static struct thread_data {
ToxWindow *self;
char id_bin[TOX_FRIEND_ADDRESS_SIZE];
char addr[MAX_STR_SIZE];
@ -82,7 +82,7 @@ static struct _thread_data {
Tox *m;
} t_data;
static struct _dns_thread {
static struct dns_thread {
pthread_t tid;
pthread_attr_t attr;
} dns_thread;
@ -92,7 +92,7 @@ static struct _dns_thread {
#define MAX_DOMAIN_SIZE 32
#define MAX_DNS_LINE MAX_DOMAIN_SIZE + (DNS3_KEY_SIZE * 2) + 3
struct _dns3_servers {
struct dns3_servers {
bool loaded;
int lines;
char names[MAX_DNS_SERVERS][MAX_DOMAIN_SIZE];
@ -152,12 +152,12 @@ static int dns_error(ToxWindow *self, const char *errmsg)
return -1;
}
static void kill_dns_thread(void *dns_obj)
static void killdns_thread(void *dns_obj)
{
if (dns_obj)
tox_dns3_kill(dns_obj);
memset(&t_data, 0, sizeof(struct _thread_data));
memset(&t_data, 0, sizeof(struct thread_data));
pthread_attr_destroy(&dns_thread.attr);
pthread_exit(NULL);
}
@ -299,7 +299,7 @@ void *dns3_lookup_thread(void *data)
if (namelen == -1) {
dns_error(self, "Must be a Tox ID or an address in the form username@domain");
kill_dns_thread(NULL);
killdns_thread(NULL);
}
char DNS_pubkey[DNS3_KEY_SIZE];
@ -309,14 +309,14 @@ void *dns3_lookup_thread(void *data)
if (match == -1) {
dns_error(self, "Domain not found.");
kill_dns_thread(NULL);
killdns_thread(NULL);
}
void *dns_obj = tox_dns3_new((uint8_t *) DNS_pubkey);
if (dns_obj == NULL) {
dns_error(self, "Core failed to create DNS object.");
kill_dns_thread(NULL);
killdns_thread(NULL);
}
char string[MAX_DNS_REQST_SIZE + 1];
@ -327,7 +327,7 @@ void *dns3_lookup_thread(void *data)
if (str_len == -1) {
dns_error(self, "Core failed to generate DNS3 string.");
kill_dns_thread(dns_obj);
killdns_thread(dns_obj);
}
string[str_len] = '\0';
@ -341,14 +341,14 @@ void *dns3_lookup_thread(void *data)
if (ans_len <= 0) {
dns_error(self, "DNS query failed.");
kill_dns_thread(dns_obj);
killdns_thread(dns_obj);
}
char ans_id[MAX_DNS_REQST_SIZE + 1];
/* extract TXT from DNS response */
if (parse_dns_response(self, answer, ans_len, ans_id) == -1)
kill_dns_thread(dns_obj);
killdns_thread(dns_obj);
char encrypted_id[MAX_DNS_REQST_SIZE + 1];
int prfx_len = strlen(TOX_DNS3_TXT_PREFIX);
@ -356,7 +356,7 @@ void *dns3_lookup_thread(void *data)
/* extract the encrypted ID from TXT response */
if (strncmp(ans_id, TOX_DNS3_TXT_PREFIX, prfx_len) != 0) {
dns_error(self, "Bad DNS3 TXT response.");
kill_dns_thread(dns_obj);
killdns_thread(dns_obj);
}
memcpy(encrypted_id, ans_id + prfx_len, ans_len - prfx_len);
@ -364,14 +364,14 @@ void *dns3_lookup_thread(void *data)
if (tox_decrypt_dns3_TXT(dns_obj, (uint8_t *) t_data.id_bin, (uint8_t *) encrypted_id,
strlen(encrypted_id), request_id) == -1) {
dns_error(self, "Core failed to decrypt DNS response.");
kill_dns_thread(dns_obj);
killdns_thread(dns_obj);
}
pthread_mutex_lock(&Winthread.lock);
cmd_add_helper(self, t_data.m, t_data.id_bin, t_data.msg);
pthread_mutex_unlock(&Winthread.lock);
kill_dns_thread(dns_obj);
killdns_thread(dns_obj);
return 0;
}

16
src/friendlist.c
View File

@ -340,25 +340,21 @@ static void friendlist_onConnectionChange(ToxWindow *self, Tox *m, int32_t num,
static void friendlist_onNickChange(ToxWindow *self, Tox *m, int32_t num, const char *nick, uint16_t len)
{
if (len > TOX_MAX_NAME_LENGTH || num >= Friends.max_idx)
if (num >= Friends.max_idx)
return;
/* save old name for log renaming */
char oldname[TOXIC_MAX_NAME_LENGTH];
char oldname[TOXIC_MAX_NAME_LENGTH + 1];
snprintf(oldname, sizeof(oldname), "%s", Friends.list[num].name);
/* update name */
char tempname[TOX_MAX_NAME_LENGTH];
strcpy(tempname, nick);
len = MIN(len, TOXIC_MAX_NAME_LENGTH - 1);
tempname[len] = '\0';
snprintf(Friends.list[num].name, sizeof(Friends.list[num].name), "%s", tempname);
Friends.list[num].namelength = len;
snprintf(Friends.list[num].name, sizeof(Friends.list[num].name), "%s", nick);
Friends.list[num].namelength = strlen(Friends.list[num].name);
/* get data for chatlog renaming */
char newnamecpy[TOXIC_MAX_NAME_LENGTH];
char newnamecpy[TOXIC_MAX_NAME_LENGTH + 1];
char myid[TOX_FRIEND_ADDRESS_SIZE];
strcpy(newnamecpy, tempname);
strcpy(newnamecpy, Friends.list[num].name);
tox_get_address(m, (uint8_t *) myid);
if (strcmp(oldname, newnamecpy) != 0)

6
src/friendlist.h
View File

@ -55,9 +55,9 @@ struct GroupChatInvite {
};
typedef struct {
char name[TOXIC_MAX_NAME_LENGTH];
char name[TOXIC_MAX_NAME_LENGTH + 1];
int namelength;
char statusmsg[TOX_MAX_STATUSMESSAGE_LENGTH];
char statusmsg[TOX_MAX_STATUSMESSAGE_LENGTH + 1];
uint16_t statusmsg_len;
char pub_key[TOX_CLIENT_ID_SIZE];
int32_t num;
@ -74,7 +74,7 @@ typedef struct {
} ToxicFriend;
typedef struct {
char name[TOXIC_MAX_NAME_LENGTH];
char name[TOXIC_MAX_NAME_LENGTH + 1];
int namelength;
char pub_key[TOX_CLIENT_ID_SIZE];
int32_t num;

18
src/groupchat.c
View File

@ -134,11 +134,6 @@ static void groupchat_onGroupMessage(ToxWindow *self, Tox *m, int groupnum, int
if (self->num != groupnum)
return;
char msg_cpy[MAX_LINE_INFO_MSG_SIZE];
len = MIN(len, MAX_LINE_INFO_MSG_SIZE - 1);
memcpy(&msg_cpy, msg, len);
msg_cpy[len] = '\0';
ChatContext *ctx = self->chatwin;
char nick[TOX_MAX_NAME_LENGTH];
@ -153,13 +148,13 @@ static void groupchat_onGroupMessage(ToxWindow *self, Tox *m, int groupnum, int
int nick_clr = strcmp(nick, selfnick) == 0 ? GREEN : CYAN;
/* Only play sound if mentioned */
if (strcasestr(msg_cpy, selfnick) && strncmp(selfnick, nick, TOXIC_MAX_NAME_LENGTH - 1)) {
if (strcasestr(msg, selfnick)) {
sound_notify(self, generic_message, NT_WNDALERT_0, NULL);
if (self->active_box != -1)
box_silent_notify2(self, NT_NOFOCUS, self->active_box, "%s %s", nick, msg_cpy);
box_silent_notify2(self, NT_NOFOCUS, self->active_box, "%s %s", nick, msg);
else
box_silent_notify(self, NT_NOFOCUS, &self->active_box, self->name, "%s %s", nick, msg_cpy);
box_silent_notify(self, NT_NOFOCUS, &self->active_box, self->name, "%s %s", nick, msg);
nick_clr = RED;
}
@ -170,8 +165,8 @@ static void groupchat_onGroupMessage(ToxWindow *self, Tox *m, int groupnum, int
char timefrmt[TIME_STR_SIZE];
get_time_str(timefrmt, sizeof(timefrmt));
line_info_add(self, timefrmt, nick, NULL, IN_MSG, 0, nick_clr, "%s", msg_cpy);
write_to_log(msg_cpy, nick, ctx->log, false);
line_info_add(self, timefrmt, nick, NULL, IN_MSG, 0, nick_clr, "%s", msg);
write_to_log(msg, nick, ctx->log, false);
}
static void groupchat_onGroupAction(ToxWindow *self, Tox *m, int groupnum, int peernum, const char *action,
@ -199,7 +194,8 @@ static void groupchat_onGroupAction(ToxWindow *self, Tox *m, int groupnum, int p
else
box_silent_notify(self, NT_NOFOCUS, &self->active_box, self->name, "* %s %s", nick, action);
}
else sound_notify(self, silent, NT_WNDALERT_1, NULL);
else
sound_notify(self, silent, NT_WNDALERT_1, NULL);
char nick[TOX_MAX_NAME_LENGTH];
n_len = tox_group_peername(m, groupnum, peernum, (uint8_t *) nick);

4
src/line_info.h
View File

@ -46,8 +46,8 @@ enum {
struct line_info {
char timestr[TIME_STR_SIZE];
char name1[TOXIC_MAX_NAME_LENGTH];
char name2[TOXIC_MAX_NAME_LENGTH];
char name1[TOXIC_MAX_NAME_LENGTH + 1];
char name2[TOXIC_MAX_NAME_LENGTH + 1];
char msg[MAX_LINE_INFO_MSG_SIZE];
uint64_t timestamp;
uint8_t type;

12
src/misc_tools.c
View File

@ -250,11 +250,21 @@ void str_to_lower(char *str)
int get_nick_truncate(Tox *m, char *buf, int friendnum)
{
int len = tox_get_name(m, friendnum, (uint8_t *) buf);
len = MIN(len, TOXIC_MAX_NAME_LENGTH - 1);
len = MIN(len, TOXIC_MAX_NAME_LENGTH);
buf[len] = '\0';
return len;
}
/* copies data to msg buffer.
returns length of msg, which will be no larger than size-1 */
uint16_t copy_tox_str(char *msg, size_t size, const char *data, uint16_t length)
{
int len = MIN(length, size - 1);
memcpy(msg, data, len);
msg[len] = '\0';
return len;
}
/* returns index of the first instance of ch in s starting at idx.
returns length of s if char not found */
int char_find(int idx, const char *s, char ch)

4
src/misc_tools.h
View File

@ -100,6 +100,10 @@ void str_to_lower(char *str);
Returns nick len on success, -1 on failure */
int get_nick_truncate(Tox *m, char *buf, int friendnum);
/* copies data to msg buffer.
returns length of msg, which will be no larger than size-1 */
uint16_t copy_tox_str(char *msg, size_t size, const char *data, uint16_t length);
/* returns index of the first instance of ch in s starting at idx.
returns length of s if char not found */
int char_find(int idx, const char *s, char ch);

3
src/prompt.c
View File

@ -364,8 +364,7 @@ static void prompt_onConnectionChange(ToxWindow *self, Tox *m, int32_t friendnum
}
}
static void prompt_onFriendRequest(ToxWindow *self, Tox *m, const char *key, const char *data,
uint16_t length)
static void prompt_onFriendRequest(ToxWindow *self, Tox *m, const char *key, const char *data, uint16_t length)
{
ChatContext *ctx = self->chatwin;

2
src/toxic.h
View File

@ -42,7 +42,7 @@
#define UNKNOWN_NAME "Anonymous"
#define MAX_STR_SIZE TOX_MAX_MESSAGE_LENGTH
#define MAX_STR_SIZE TOX_MAX_MESSAGE_LENGTH /* must be >= TOX_MAX_MESSAGE_LENGTH */
#define MAX_CMDNAME_SIZE 64
#define TOXIC_MAX_NAME_LENGTH 32 /* Must be <= TOX_MAX_NAME_LENGTH */
#define KEY_IDENT_DIGITS 3 /* number of hex digits to display for the pub-key based identifier */

34
src/windows.c
View File

@ -32,6 +32,7 @@
#include "groupchat.h"
#include "chat.h"
#include "line_info.h"
#include "misc_tools.h"
#include "settings.h"
extern char *DATA_FILE;
@ -47,11 +48,14 @@ static int num_active_windows;
/* CALLBACKS START */
void on_request(Tox *m, const uint8_t *public_key, const uint8_t *data, uint16_t length, void *userdata)
{
char msg[MAX_STR_SIZE + 1];
length = copy_tox_str(msg, sizeof(msg), (const char *) data, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
if (windows[i].onFriendRequest != NULL)
windows[i].onFriendRequest(&windows[i], m, (const char *) public_key, (const char *) data, length);
windows[i].onFriendRequest(&windows[i], m, (const char *) public_key, msg, length);
}
}
@ -80,16 +84,22 @@ void on_typing_change(Tox *m, int32_t friendnumber, uint8_t is_typing, void *use
void on_message(Tox *m, int32_t friendnumber, const uint8_t *string, uint16_t length, void *userdata)
{
char msg[MAX_STR_SIZE + 1];
length = copy_tox_str(msg, sizeof(msg), (const char *) string, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
if (windows[i].onMessage != NULL)
windows[i].onMessage(&windows[i], m, friendnumber, (const char *) string, length);
windows[i].onMessage(&windows[i], m, friendnumber, msg, length);
}
}
void on_action(Tox *m, int32_t friendnumber, const uint8_t *string, uint16_t length, void *userdata)
{
char msg[MAX_STR_SIZE + 1];
length = copy_tox_str(msg, sizeof(msg), (const char *) string, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
@ -100,11 +110,14 @@ void on_action(Tox *m, int32_t friendnumber, const uint8_t *string, uint16_t len
void on_nickchange(Tox *m, int32_t friendnumber, const uint8_t *string, uint16_t length, void *userdata)
{
char nick[TOXIC_MAX_NAME_LENGTH + 1];
length = copy_tox_str(nick, sizeof(nick), (const char *) string, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
if (windows[i].onNickChange != NULL)
windows[i].onNickChange(&windows[i], m, friendnumber, (const char *) string, length);
windows[i].onNickChange(&windows[i], m, friendnumber, nick, length);
}
store_data(m, DATA_FILE);
@ -112,11 +125,14 @@ void on_nickchange(Tox *m, int32_t friendnumber, const uint8_t *string, uint16_t
void on_statusmessagechange(Tox *m, int32_t friendnumber, const uint8_t *string, uint16_t length, void *userdata)
{
char msg[TOX_MAX_STATUSMESSAGE_LENGTH + 1];
length = copy_tox_str(msg, sizeof(msg), (const char *) string, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
if (windows[i].onStatusMessageChange != NULL)
windows[i].onStatusMessageChange(&windows[i], friendnumber, (const char *) string, length);
windows[i].onStatusMessageChange(&windows[i], friendnumber, msg, length);
}
}
@ -145,22 +161,28 @@ void on_friendadded(Tox *m, int32_t friendnumber, bool sort)
void on_groupmessage(Tox *m, int groupnumber, int peernumber, const uint8_t *message, uint16_t length,
void *userdata)
{
char msg[MAX_STR_SIZE + 1];
length = copy_tox_str(msg, sizeof(msg), (const char *) message, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
if (windows[i].onGroupMessage != NULL)
windows[i].onGroupMessage(&windows[i], m, groupnumber, peernumber, (const char *) message, length);
windows[i].onGroupMessage(&windows[i], m, groupnumber, peernumber, msg, length);
}
}
void on_groupaction(Tox *m, int groupnumber, int peernumber, const uint8_t *action, uint16_t length,
void *userdata)
{
char msg[MAX_STR_SIZE + 1];
length = copy_tox_str(msg, sizeof(msg), (const char *) action, length);
int i;
for (i = 0; i < MAX_WINDOWS_NUM; ++i) {
if (windows[i].onGroupAction != NULL)
windows[i].onGroupAction(&windows[i], m, groupnumber, peernumber, (const char *) action, length);
windows[i].onGroupAction(&windows[i], m, groupnumber, peernumber, msg, length);
}
}

6
src/windows.h
View File

@ -146,7 +146,7 @@ struct ToxWindow {
int active_box; /* For box notify */
char name[TOXIC_MAX_NAME_LENGTH];
char name[TOXIC_MAX_NAME_LENGTH + 1];
int32_t num; /* corresponds to friendnumber in chat windows */
bool active;
int x;
@ -168,9 +168,9 @@ struct ToxWindow {
/* statusbar info holder */
struct StatusBar {
WINDOW *topline;
char statusmsg[TOX_MAX_STATUSMESSAGE_LENGTH];
char statusmsg[TOX_MAX_STATUSMESSAGE_LENGTH + 1];
uint16_t statusmsg_len;
char nick[TOXIC_MAX_NAME_LENGTH];
char nick[TOXIC_MAX_NAME_LENGTH + 1];
int nick_len;
uint8_t status;
bool is_online;