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housekeeping

pull/1081/head
dubslow 2014-09-24 13:00:42 -05:00
parent 744f51ec36
commit ba6ae15a73
5 changed files with 114 additions and 75 deletions
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30
testing/test_avatars.c
View File

@ -86,8 +86,8 @@ typedef struct {
static const def_avatar_name_t def_avatar_names[] = {
/* In order of preference */
{ TOX_AVATARFORMAT_PNG, "png", "avatar.png" },
{ TOX_AVATARFORMAT_NONE, NULL, NULL }, /* Must be the last one */
{ TOX_AVATAR_FORMAT_PNG, "png", "avatar.png" },
{ TOX_AVATAR_FORMAT_NONE, NULL, NULL }, /* Must be the last one */
};
@ -99,7 +99,7 @@ static char *get_avatar_suffix_from_format(uint8_t format)
{
int i;
for (i = 0; def_avatar_names[i].format != TOX_AVATARFORMAT_NONE; i++)
for (i = 0; def_avatar_names[i].format != TOX_AVATAR_FORMAT_NONE; i++)
if (def_avatar_names[i].format == format)
return def_avatar_names[i].suffix;
@ -118,7 +118,7 @@ static int load_avatar_data(char *fname, uint8_t *buf)
if (fp == NULL)
return -1; /* Error */
size_t n = fread(buf, 1, TOX_MAX_AVATAR_DATA_LENGTH, fp);
size_t n = fread(buf, 1, TOX_AVATAR_MAX_DATA_LENGTH, fp);
int ret;
if (ferror(fp) != 0 || n == 0)
@ -267,7 +267,7 @@ static int delete_user_avatar(Tox *tox, char *base_dir, int friendnum)
/* This iteration is dumb and inefficient */
int i;
for (i = 0; def_avatar_names[i].format != TOX_AVATARFORMAT_NONE; i++) {
for (i = 0; def_avatar_names[i].format != TOX_AVATAR_FORMAT_NONE; i++) {
int ret = make_avatar_file_name(path, sizeof(path), base_dir,
def_avatar_names[i].format, addr);
@ -318,7 +318,7 @@ static void friend_avatar_info_cb(Tox *tox, int32_t n, uint8_t format, uint8_t *
byte_to_hex_str(hash, TOX_AVATAR_HASH_LENGTH, hash_str);
DEBUG("format=%u, hash=%s", format, hash_str);
if (format == TOX_AVATARFORMAT_NONE) {
if (format == TOX_AVATAR_FORMAT_NONE) {
printf(" -> User do not have an avatar.\n");
/* User have no avatar anymore, delete it from our cache */
delete_user_avatar(tox, base_dir, n);
@ -332,7 +332,7 @@ static void friend_avatar_info_cb(Tox *tox, int32_t n, uint8_t format, uint8_t *
* these events.
*/
uint32_t cur_av_len;
uint8_t cur_av_data[TOX_MAX_AVATAR_DATA_LENGTH];
uint8_t cur_av_data[TOX_AVATAR_MAX_DATA_LENGTH];
uint8_t cur_av_hash[TOX_AVATAR_HASH_LENGTH];
int ret;
@ -370,7 +370,7 @@ static void friend_avatar_data_cb(Tox *tox, int32_t n, uint8_t format,
delete_user_avatar(tox, base_dir, n);
if (format != TOX_AVATARFORMAT_NONE) {
if (format != TOX_AVATAR_FORMAT_NONE) {
int ret = save_user_avatar(tox, base_dir, n, format, data, datalen);
if (ret == 0)
@ -406,7 +406,7 @@ static void friend_msg_cb(Tox *tox, int n, const uint8_t *msg, uint16_t len, voi
set_avatar(tox, base_dir);
reply_ptr = "Setting image avatar";
} else if (strstr(msg_str, "!remove-avatar") != NULL) {
int r = tox_set_avatar(tox, TOX_AVATARFORMAT_NONE, NULL, 0);
int r = tox_set_avatar(tox, TOX_AVATAR_FORMAT_NONE, NULL, 0);
DEBUG("tox_set_avatar returned %d", r);
reply_ptr = "Removing avatar";
}
@ -453,10 +453,10 @@ static int try_avatar_file(Tox *tox, const char *base_dir, const def_avatar_name
FILE *fp = fopen(path, "rb");
if (fp != NULL) {
uint8_t buf[2 * TOX_MAX_AVATAR_DATA_LENGTH];
uint8_t buf[2 * TOX_AVATAR_MAX_DATA_LENGTH];
int len = fread(buf, 1, sizeof(buf), fp);
if (len >= 0 && len <= TOX_MAX_AVATAR_DATA_LENGTH) {
if (len >= 0 && len <= TOX_AVATAR_MAX_DATA_LENGTH) {
int r = tox_set_avatar(tox, an->format, buf, len);
DEBUG("%d bytes, tox_set_avatar returned=%d", len, r);
@ -468,7 +468,7 @@ static int try_avatar_file(Tox *tox, const char *base_dir, const def_avatar_name
DEBUG("read error %d", len);
} else {
printf("Avatar file %s if too big (more than %d bytes)",
path, TOX_MAX_AVATAR_DATA_LENGTH);
path, TOX_AVATAR_MAX_DATA_LENGTH);
}
fclose(fp);
@ -486,8 +486,8 @@ static void set_avatar(Tox *tox, const char *base_dir)
int i;
for (i = 0; i < 4; i++) {
if (def_avatar_names[i].format == TOX_AVATARFORMAT_NONE) {
tox_set_avatar(tox, TOX_AVATARFORMAT_NONE, NULL, 0);
if (def_avatar_names[i].format == TOX_AVATAR_FORMAT_NONE) {
tox_set_avatar(tox, TOX_AVATAR_FORMAT_NONE, NULL, 0);
printf("No avatar file found, setting to NONE.\n");
return;
} else {
@ -504,7 +504,7 @@ static void set_avatar(Tox *tox, const char *base_dir)
static void print_avatar_info(Tox *tox)
{
uint8_t format;
uint8_t data[TOX_MAX_AVATAR_DATA_LENGTH];
uint8_t data[TOX_AVATAR_MAX_DATA_LENGTH];
uint8_t hash[TOX_AVATAR_HASH_LENGTH];
uint32_t data_length;
char hash_str[2 * TOX_AVATAR_HASH_LENGTH + 1];

49
toxcore/Messenger.c
View File

@ -576,10 +576,10 @@ int m_set_userstatus(Messenger *m, uint8_t status)
int m_set_avatar(Messenger *m, uint8_t format, const uint8_t *data, uint32_t length)
{
if (length > MAX_AVATAR_DATA_LENGTH)
if (length > AVATAR_MAX_DATA_LENGTH)
return -1;
if (format == AVATARFORMAT_NONE) {
if (format == AVATAR_FORMAT_NONE) {
free(m->avatar_data);
m->avatar_data = NULL;
m->avatar_data_length = 0;
@ -632,15 +632,18 @@ int m_get_self_avatar(const Messenger *m, uint8_t *format, uint8_t *buf, uint32_
return 0;
}
int m_avatar_hash(uint8_t *hash, const uint8_t *data, const uint32_t datalen)
int m_hash(uint8_t *hash, const uint8_t *data, const uint32_t datalen)
{
if (hash == NULL)
return -1;
crypto_hash_sha256(hash, data, datalen);
return 0;
return crypto_hash_sha256(hash, data, datalen);
}
int m_avatar_hash(uint8_t *hash, const uint8_t *data, const uint32_t datalen)
{
return m_hash(hash, data, datalen);
}
int m_request_avatar_info(const Messenger *m, const int32_t friendnumber)
{
@ -673,10 +676,10 @@ int m_request_avatar_data(const Messenger *m, const int32_t friendnumber)
if (friend_not_valid(m, friendnumber))
return -1;
AVATARRECEIVEDATA *avrd = m->friendlist[friendnumber].avatar_recv_data;
AVATAR_RECEIVEDATA *avrd = m->friendlist[friendnumber].avatar_recv_data;
if (avrd == NULL) {
avrd = calloc(sizeof(AVATARRECEIVEDATA), 1);
avrd = calloc(sizeof(AVATAR_RECEIVEDATA), 1);
if (avrd == NULL)
return -1;
@ -693,9 +696,9 @@ int m_request_avatar_data(const Messenger *m, const int32_t friendnumber)
avrd->started = 0;
avrd->bytes_received = 0;
avrd->total_length = 0;
avrd->format = AVATARFORMAT_NONE;
avrd->format = AVATAR_FORMAT_NONE;
return send_avatar_data_control(m, friendnumber, AVATARDATACONTROL_REQ);
return send_avatar_data_control(m, friendnumber, AVATAR_DATACONTROL_REQ);
}
@ -2006,7 +2009,7 @@ Messenger *new_messenger(Messenger_Options *options)
m->net = new_networking(ip, TOX_PORT_DEFAULT);
}
m->avatar_format = AVATARFORMAT_NONE;
m->avatar_format = AVATAR_FORMAT_NONE;
m->avatar_data = NULL;
if (m->net == NULL) {
@ -2159,17 +2162,17 @@ static int handle_avatar_data_control(Messenger *m, uint32_t friendnumber,
LOGGER_DEBUG("Error: PACKET_ID_AVATAR_DATA_CONTROL with bad "
"data_length = %u, friendnumber = %u",
data_length, friendnumber);
send_avatar_data_control(m, friendnumber, AVATARDATACONTROL_ERROR);
send_avatar_data_control(m, friendnumber, AVATAR_DATACONTROL_ERROR);
return -1; /* Error */
}
LOGGER_DEBUG("friendnumber = %u, op = %u", friendnumber, data[0]);
switch (data[0]) {
case AVATARDATACONTROL_REQ: {
case AVATAR_DATACONTROL_REQ: {
/* Check data transfer limits for this friend */
AVATARSENDDATA *const avsd = &(m->friendlist[friendnumber].avatar_send_data);
AVATAR_SENDDATA *const avsd = &(m->friendlist[friendnumber].avatar_send_data);
if (avsd->bytes_sent >= AVATAR_DATA_TRANSFER_LIMIT) {
/* User reached data limit. Check timeout */
@ -2183,7 +2186,7 @@ static int handle_avatar_data_control(Messenger *m, uint32_t friendnumber,
/* Friend still rate-limitted. Send an error and stops. */
LOGGER_DEBUG("Avatar data transfer limit reached. "
"friendnumber = %u", friendnumber);
send_avatar_data_control(m, friendnumber, AVATARDATACONTROL_ERROR);
send_avatar_data_control(m, friendnumber, AVATAR_DATACONTROL_ERROR);
return 0;
}
}
@ -2211,12 +2214,12 @@ static int handle_avatar_data_control(Messenger *m, uint32_t friendnumber,
if (!ret) {
/* Something went wrong, try to signal the error so the friend
* can clear up the state. */
send_avatar_data_control(m, friendnumber, AVATARDATACONTROL_ERROR);
send_avatar_data_control(m, friendnumber, AVATAR_DATACONTROL_ERROR);
return 0;
}
/* User have no avatar data, nothing more to do. */
if (m->avatar_format == AVATARFORMAT_NONE)
if (m->avatar_format == AVATAR_FORMAT_NONE)
return 0;
/* Send the actual avatar data. */
@ -2241,7 +2244,7 @@ static int handle_avatar_data_control(Messenger *m, uint32_t friendnumber,
LOGGER_DEBUG("write_cryptpacket_id failed. ret = %d, "
"friendnumber = %u, offset = %u",
ret, friendnumber, offset);
send_avatar_data_control(m, friendnumber, AVATARDATACONTROL_ERROR);
send_avatar_data_control(m, friendnumber, AVATAR_DATACONTROL_ERROR);
return -1;
}
}
@ -2249,7 +2252,7 @@ static int handle_avatar_data_control(Messenger *m, uint32_t friendnumber,
return 0;
}
case AVATARDATACONTROL_ERROR: {
case AVATAR_DATACONTROL_ERROR: {
if (m->friendlist[friendnumber].avatar_recv_data) {
/* We were receiving the data, sender detected an error
(eg. changing avatar) and asked us to stop. */
@ -2276,7 +2279,7 @@ static int handle_avatar_data_start(Messenger *m, uint32_t friendnumber,
return -1;
}
AVATARRECEIVEDATA *avrd = m->friendlist[friendnumber].avatar_recv_data;
AVATAR_RECEIVEDATA *avrd = m->friendlist[friendnumber].avatar_recv_data;
if (avrd == NULL) {
LOGGER_DEBUG("Received an unrequested DATA_START, friendnumber = %u",
@ -2307,7 +2310,7 @@ static int handle_avatar_data_start(Messenger *m, uint32_t friendnumber,
friendnumber, avrd->format, avrd->total_length,
avrd->bytes_received);
if (avrd->total_length > MAX_AVATAR_DATA_LENGTH) {
if (avrd->total_length > AVATAR_MAX_DATA_LENGTH) {
/* Invalid data length. Stops. */
LOGGER_DEBUG("Error: total_length > MAX_AVATAR_DATA_LENGTH, "
"friendnumber = %u", friendnumber);
@ -2317,7 +2320,7 @@ static int handle_avatar_data_start(Messenger *m, uint32_t friendnumber,
return 0;
}
if (avrd->format == AVATARFORMAT_NONE || avrd->total_length == 0) {
if (avrd->format == AVATAR_FORMAT_NONE || avrd->total_length == 0) {
/* No real data to receive. Run callback function and finish. */
LOGGER_DEBUG("format == NONE, friendnumber = %u", friendnumber);
@ -2343,7 +2346,7 @@ static int handle_avatar_data_push(Messenger *m, uint32_t friendnumber,
{
LOGGER_DEBUG("friendnumber = %u, data_length = %u", friendnumber, data_length);
AVATARRECEIVEDATA *avrd = m->friendlist[friendnumber].avatar_recv_data;
AVATAR_RECEIVEDATA *avrd = m->friendlist[friendnumber].avatar_recv_data;
if (avrd == NULL) {
/* No active transfer. It must be an error or a malicious request,
@ -2363,7 +2366,7 @@ static int handle_avatar_data_push(Messenger *m, uint32_t friendnumber,
uint32_t new_length = avrd->bytes_received + data_length;
if (new_length > avrd->total_length
|| new_length >= MAX_AVATAR_DATA_LENGTH) {
|| new_length >= AVATAR_MAX_DATA_LENGTH) {
/* Invalid data length due to error or malice. Stops. */
LOGGER_DEBUG("Invalid data length. friendnumber = %u, "
"new_length = %u, avrd->total_length = %u",

61
toxcore/Messenger.h
View File

@ -36,8 +36,8 @@
#define MAX_NAME_LENGTH 128
/* TODO: this must depend on other variable. */
#define MAX_STATUSMESSAGE_LENGTH 1007
#define MAX_AVATAR_DATA_LENGTH 16384
#define AVATAR_HASH_LENGTH 32
#define AVATAR_MAX_DATA_LENGTH 16384
#define AVATAR_HASH_LENGTH crypto_hash_sha256_BYTES
#define FRIEND_ADDRESS_SIZE (crypto_box_PUBLICKEYBYTES + sizeof(uint32_t) + sizeof(uint16_t))
@ -121,7 +121,7 @@ enum {
#define AVATAR_DATA_MAX_CHUNK_SIZE (MAX_CRYPTO_DATA_SIZE-1)
/* Per-friend data limit for avatar data requests */
#define AVATAR_DATA_TRANSFER_LIMIT (10*MAX_AVATAR_DATA_LENGTH)
#define AVATAR_DATA_TRANSFER_LIMIT (10*AVATAR_MAX_DATA_LENGTH)
#define AVATAR_DATA_TRANSFER_TIMEOUT (60) /* 164kB every 60 seconds is not a lot */
@ -137,40 +137,40 @@ typedef enum {
}
USERSTATUS;
/* AVATARFORMAT -
/* AVATAR_FORMAT -
* Data formats for user avatar images
*/
typedef enum {
AVATARFORMAT_NONE,
AVATARFORMAT_PNG
AVATAR_FORMAT_NONE = 0,
AVATAR_FORMAT_PNG
}
AVATARFORMAT;
AVATAR_FORMAT;
/* AVATARDATACONTROL
/* AVATAR_DATACONTROL
* To control avatar data requests (PACKET_ID_AVATAR_DATA_CONTROL)
*/
typedef enum {
AVATARDATACONTROL_REQ,
AVATARDATACONTROL_ERROR
AVATAR_DATACONTROL_REQ,
AVATAR_DATACONTROL_ERROR
}
AVATARDATACONTROL;
AVATAR_DATACONTROL;
typedef struct {
uint8_t started;
AVATARFORMAT format;
AVATAR_FORMAT format;
uint8_t hash[AVATAR_HASH_LENGTH];
uint32_t total_length;
uint32_t bytes_received;
uint8_t data[MAX_AVATAR_DATA_LENGTH];
uint8_t data[AVATAR_MAX_DATA_LENGTH];
}
AVATARRECEIVEDATA;
AVATAR_RECEIVEDATA;
typedef struct {
/* Fields only used to limit the network usage from a given friend */
uint32_t bytes_sent; /* Total bytes send to this user */
uint64_t last_reset; /* Time the data counter was last reset */
}
AVATARSENDDATA;
AVATAR_SENDDATA;
struct File_Transfers {
@ -230,8 +230,8 @@ typedef struct {
int invited_groups[MAX_INVITED_GROUPS];
uint16_t invited_groups_num;
AVATARSENDDATA avatar_send_data;
AVATARRECEIVEDATA *avatar_recv_data; // We are receiving avatar data from this friend.
AVATAR_SENDDATA avatar_send_data;
AVATAR_RECEIVEDATA *avatar_recv_data; // We are receiving avatar data from this friend.
struct {
int (*function)(void *object, const uint8_t *data, uint32_t len);
@ -264,7 +264,7 @@ typedef struct Messenger {
USERSTATUS userstatus;
AVATARFORMAT avatar_format;
AVATAR_FORMAT avatar_format;
uint8_t *avatar_data;
uint32_t avatar_data_length;
uint8_t avatar_hash[AVATAR_HASH_LENGTH];
@ -509,7 +509,7 @@ uint8_t m_get_self_userstatus(const Messenger *m);
* Notice that the library treats the image as raw data and does not interpret it by any way.
*
* Arguments:
* format - Avatar image format or NONE for user with no avatar (see AVATARFORMAT);
* format - Avatar image format or NONE for user with no avatar (see AVATAR_FORMAT);
* data - pointer to the avatar data (may be NULL it the format is NONE);
* length - length of image data. Must be <= MAX_AVATAR_DATA_LENGTH.
*
@ -528,7 +528,7 @@ int m_set_avatar(Messenger *m, uint8_t format, const uint8_t *data, uint32_t len
* If any of the pointers format, buf, length, and hash are NULL, that particular field will be ignored.
*
* Arguments:
* format - destination pointer to the avatar image format (see AVATARFORMAT);
* format - destination pointer to the avatar image format (see AVATAR_FORMAT);
* buf - destination buffer to the image data. Must have at least 'maxlen' bytes;
* length - destination pointer to the image data length;
* maxlen - length of the destination buffer 'buf';
@ -541,8 +541,23 @@ int m_set_avatar(Messenger *m, uint8_t format, const uint8_t *data, uint32_t len
int m_get_self_avatar(const Messenger *m, uint8_t *format, uint8_t *buf, uint32_t *length, uint32_t maxlen,
uint8_t *hash);
/* Generates a cryptographic hash of the given data.
* This function may be used by clients for any purpose, but is provided primarily for
* validating cached avatars.
* This function is a wrapper to internal message-digest functions.
*
* Arguments:
* hash - destination buffer for the hash data, it must be exactly crypto_hash_sha256_BYTES bytes long.
* data - data to be hashed;
* datalen - length of the data;
*
* returns 0 on success
* returns -1 on failure.
*/
int m_hash(uint8_t *hash, const uint8_t *data, const uint32_t datalen);
/* Generates a cryptographic hash of the given avatar data.
* This function is a wrapper to internal message-digest functions and specifically provided
* This function is a wrapper to m_hash and specifically provided
* to generate hashes from user avatars that may be memcmp()ed with the values returned by the
* other avatar functions. It is specially important to validate cached avatars.
*
@ -694,7 +709,7 @@ void m_callback_connectionstatus_internal_av(Messenger *m, void (*function)(Mess
* Function format is:
* function(Tox *tox, int32_t friendnumber, uint8_t format, uint8_t *hash, void *userdata)
*
* where 'format' is the avatar image format (see AVATARFORMAT) and 'hash' is the hash of
* where 'format' is the avatar image format (see AVATAR_FORMAT) and 'hash' is the hash of
* the avatar data for caching purposes and it is exactly AVATAR_HASH_LENGTH long. If the
* image format is NONE, the hash is zeroed.
*
@ -710,7 +725,7 @@ void m_callback_avatar_info(Messenger *m, void (*function)(Messenger *m, int32_t
* Function format is:
* function(Tox *tox, int32_t friendnumber, uint8_t format, uint8_t *hash, uint8_t *data, uint32_t datalen, void *userdata)
*
* where 'format' is the avatar image format (see AVATARFORMAT); 'hash' is the
* where 'format' is the avatar image format (see AVATAR_FORMAT); 'hash' is the
* locally-calculated cryptographic hash of the avatar data and it is exactly
* AVATAR_HASH_LENGTH long; 'data' is the avatar image data and 'datalen' is the length
* of such data.

7
toxcore/tox.c
View File

@ -826,9 +826,14 @@ int tox_get_self_avatar(const Tox *tox, uint8_t *format, uint8_t *buf, uint32_t
return m_get_self_avatar(m, format, buf, length, maxlen, hash);
}
int tox_hash(const Tox *tox, uint8_t *hash, const uint8_t *data, const uint32_t datalen)
{
return m_hash(hash, data, datalen);
}
int tox_avatar_hash(const Tox *tox, uint8_t *hash, const uint8_t *data, const uint32_t datalen)
{
return m_avatar_hash(hash, data, datalen);
return m_hash(hash, data, datalen);
}
int tox_request_avatar_info(const Tox *tox, const int32_t friendnumber)

42
toxcore/tox.h
View File

@ -37,8 +37,9 @@ extern "C" {
#define TOX_MAX_MESSAGE_LENGTH 1368
#define TOX_MAX_STATUSMESSAGE_LENGTH 1007
#define TOX_CLIENT_ID_SIZE 32
#define TOX_MAX_AVATAR_DATA_LENGTH 16384
#define TOX_AVATAR_HASH_LENGTH 32
#define TOX_AVATAR_MAX_DATA_LENGTH 16384
#define TOX_AVATAR_HASH_LENGTH /*crypto_hash_sha256_BYTES*/ 32
#define TOX_HASH_LENGTH TOX_AVATAR_HASH_LENGTH
#define TOX_FRIEND_ADDRESS_SIZE (TOX_CLIENT_ID_SIZE + sizeof(uint32_t) + sizeof(uint16_t))
@ -73,14 +74,14 @@ typedef enum {
TOX_USERSTATUS;
/* AVATARFORMAT -
/* AVATAR_FORMAT -
* Data formats for user avatar images
*/
typedef enum {
TOX_AVATARFORMAT_NONE,
TOX_AVATARFORMAT_PNG
TOX_AVATAR_FORMAT_NONE = 0,
TOX_AVATAR_FORMAT_PNG
}
TOX_AVATARFORMAT;
TOX_AVATAR_FORMAT;
#ifndef __TOX_DEFINED__
#define __TOX_DEFINED__
@ -538,7 +539,7 @@ uint32_t tox_get_chatlist(const Tox *tox, int *out_list, uint32_t list_size);
* Function format is:
* function(Tox *tox, int32_t friendnumber, uint8_t format, uint8_t *hash, void *userdata)
*
* where 'format' is the avatar image format (see TOX_AVATARFORMAT) and 'hash' is the hash of
* where 'format' is the avatar image format (see TOX_AVATAR_FORMAT) and 'hash' is the hash of
* the avatar data for caching purposes and it is exactly TOX_AVATAR_HASH_LENGTH long. If the
* image format is NONE, the hash is zeroed.
*
@ -554,7 +555,7 @@ void tox_callback_avatar_info(Tox *tox, void (*function)(Tox *tox, int32_t, uint
* Function format is:
* function(Tox *tox, int32_t friendnumber, uint8_t format, uint8_t *hash, uint8_t *data, uint32_t datalen, void *userdata)
*
* where 'format' is the avatar image format (see TOX_AVATARFORMAT); 'hash' is the
* where 'format' is the avatar image format (see TOX_AVATAR_FORMAT); 'hash' is the
* locally-calculated cryptographic hash of the avatar data and it is exactly
* TOX_AVATAR_HASH_LENGTH long; 'data' is the avatar image data and 'datalen' is the length
* of such data.
@ -577,9 +578,9 @@ void tox_callback_avatar_data(Tox *tox, void (*function)(Tox *tox, int32_t, uint
* Notice that the library treats the image as raw data and does not interpret it by any way.
*
* Arguments:
* format - Avatar image format or NONE for user with no avatar (see TOX_AVATARFORMAT);
* format - Avatar image format or NONE for user with no avatar (see TOX_AVATAR_FORMAT);
* data - pointer to the avatar data (may be NULL it the format is NONE);
* length - length of image data. Must be <= TOX_MAX_AVATAR_DATA_LENGTH.
* length - length of image data. Must be <= TOX_AVATAR_MAX_DATA_LENGTH.
*
* returns 0 on success
* returns -1 on failure.
@ -597,7 +598,7 @@ int tox_set_avatar(Tox *tox, uint8_t format, const uint8_t *data, uint32_t lengt
* If any of the pointers format, buf, length, and hash are NULL, that particular field will be ignored.
*
* Arguments:
* format - destination pointer to the avatar image format (see TOX_AVATARFORMAT);
* format - destination pointer to the avatar image format (see TOX_AVATAR_FORMAT);
* buf - destination buffer to the image data. Must have at least 'maxlen' bytes;
* length - destination pointer to the image data length;
* maxlen - length of the destination buffer 'buf';
@ -611,15 +612,30 @@ int tox_get_self_avatar(const Tox *tox, uint8_t *format, uint8_t *buf, uint32_t
uint8_t *hash);
/* Generates a cryptographic hash of the given data.
* This function may be used by clients for any purpose, but is provided primarily for
* validating cached avatars.
* This function is a wrapper to internal message-digest functions.
*
* Arguments:
* hash - destination buffer for the hash data, it must be exactly TOX_HASH_LENGTH bytes long.
* data - data to be hashed;
* datalen - length of the data;
*
* returns 0 on success
* returns -1 on failure.
*/
int m_hash(uint8_t *hash, const uint8_t *data, const uint32_t datalen);
/* Generates a cryptographic hash of the given avatar data.
* This function is a wrapper to internal message-digest functions and specifically provided
* This function is a wrapper to tox_hash and specifically provided
* to generate hashes from user avatars that may be memcmp()ed with the values returned by the
* other avatar functions. It is specially important to validate cached avatars.
*
* Arguments:
* hash - destination buffer for the hash data, it must be exactly TOX_AVATAR_HASH_LENGTH bytes long.
* data - avatar image data;
* datalen - length of the avatar image data; it must be <= TOX_MAX_AVATAR_DATA_LENGTH.
* datalen - length of the avatar image data; it must be <= MAX_AVATAR_DATA_LENGTH.
*
* returns 0 on success
* returns -1 on failure.