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Dynamically allocate memory for save file instead of using stack

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This commit is contained in:
Jfreegman 2016-05-03 14:13:16 -04:00
parent 32442b6286
commit cf16849b37
No known key found for this signature in database
GPG Key ID: 3627F3144076AE63
2 changed files with 44 additions and 11 deletions
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27
src/friendlist.c
View File

@ -133,17 +133,24 @@ void kill_friendlist(void)
#define TEMP_BLOCKLIST_EXT ".tmp" #define TEMP_BLOCKLIST_EXT ".tmp"
static int save_blocklist(char *path) static int save_blocklist(char *path)
{ {
if (path == NULL) if (path == NULL) {
return -1; return -1;
}
int len = sizeof(BlockedFriend) * Blocked.num_blocked; int len = sizeof(BlockedFriend) * Blocked.num_blocked;
char data[len]; char *data = malloc(len * sizeof(char));
if (data == NULL) {
return -1;
}
int i, count = 0; int i, count = 0;
for (i = 0; i < Blocked.max_idx; ++i) { for (i = 0; i < Blocked.max_idx; ++i) {
if (count > Blocked.num_blocked) if (count > Blocked.num_blocked) {
free(data);
return -1; return -1;
}
if (Blocked.list[i].active) { if (Blocked.list[i].active) {
BlockedFriend tmp; BlockedFriend tmp;
@ -164,8 +171,11 @@ static int save_blocklist(char *path)
/* Blocklist is empty, we can remove the empty file */ /* Blocklist is empty, we can remove the empty file */
if (count == 0) { if (count == 0) {
if (remove(path) != 0) free(data);
if (remove(path) != 0) {
return -1; return -1;
}
return 0; return 0;
} }
@ -175,19 +185,24 @@ static int save_blocklist(char *path)
FILE *fp = fopen(temp_path, "wb"); FILE *fp = fopen(temp_path, "wb");
if (fp == NULL) if (fp == NULL) {
free(data);
return -1; return -1;
}
if (fwrite(data, len, 1, fp) != 1) { if (fwrite(data, len, 1, fp) != 1) {
fprintf(stderr, "Failed to write blocklist data.\n"); fprintf(stderr, "Failed to write blocklist data.\n");
fclose(fp); fclose(fp);
free(data);
return -1; return -1;
} }
fclose(fp); fclose(fp);
free(data);
if (rename(temp_path, path) != 0) if (rename(temp_path, path) != 0) {
return -1; return -1;
}
return 0; return 0;
} }

28
src/toxic.c
View File

@ -584,25 +584,36 @@ static void first_time_encrypt(const char *msg)
#define TEMP_PROFILE_EXT ".tmp" #define TEMP_PROFILE_EXT ".tmp"
int store_data(Tox *m, const char *path) int store_data(Tox *m, const char *path)
{ {
if (path == NULL) if (path == NULL) {
return -1; return -1;
}
char temp_path[strlen(path) + strlen(TEMP_PROFILE_EXT) + 1]; char temp_path[strlen(path) + strlen(TEMP_PROFILE_EXT) + 1];
snprintf(temp_path, sizeof(temp_path), "%s%s", path, TEMP_PROFILE_EXT); snprintf(temp_path, sizeof(temp_path), "%s%s", path, TEMP_PROFILE_EXT);
FILE *fp = fopen(temp_path, "wb"); FILE *fp = fopen(temp_path, "wb");
if (fp == NULL) if (fp == NULL) {
return -1; return -1;
}
size_t data_len = tox_get_savedata_size(m); size_t data_len = tox_get_savedata_size(m);
char data[data_len]; char *data = malloc(data_len * sizeof(char));
if (data == NULL) {
return -1;
}
tox_get_savedata(m, (uint8_t *) data); tox_get_savedata(m, (uint8_t *) data);
if (user_password.data_is_encrypted && !arg_opts.unencrypt_data) { if (user_password.data_is_encrypted && !arg_opts.unencrypt_data) {
size_t enc_len = data_len + TOX_PASS_ENCRYPTION_EXTRA_LENGTH; size_t enc_len = data_len + TOX_PASS_ENCRYPTION_EXTRA_LENGTH;
char enc_data[enc_len]; char *enc_data = malloc(enc_len * sizeof(char));
if (enc_data == NULL) {
free(data);
return -1;
}
TOX_ERR_ENCRYPTION err; TOX_ERR_ENCRYPTION err;
tox_pass_encrypt((uint8_t *) data, data_len, (uint8_t *) user_password.pass, user_password.len, tox_pass_encrypt((uint8_t *) data, data_len, (uint8_t *) user_password.pass, user_password.len,
@ -611,26 +622,33 @@ int store_data(Tox *m, const char *path)
if (err != TOX_ERR_ENCRYPTION_OK) { if (err != TOX_ERR_ENCRYPTION_OK) {
fprintf(stderr, "tox_pass_encrypt() failed with error %d\n", err); fprintf(stderr, "tox_pass_encrypt() failed with error %d\n", err);
fclose(fp); fclose(fp);
free(data);
free(enc_data);
return -1; return -1;
} }
if (fwrite(enc_data, enc_len, 1, fp) != 1) { if (fwrite(enc_data, enc_len, 1, fp) != 1) {
fprintf(stderr, "Failed to write profile data.\n"); fprintf(stderr, "Failed to write profile data.\n");
fclose(fp); fclose(fp);
free(data);
free(enc_data);
return -1; return -1;
} }
} else { /* data will not be encrypted */ } else { /* data will not be encrypted */
if (fwrite(data, data_len, 1, fp) != 1) { if (fwrite(data, data_len, 1, fp) != 1) {
fprintf(stderr, "Failed to write profile data.\n"); fprintf(stderr, "Failed to write profile data.\n");
fclose(fp); fclose(fp);
free(data);
return -1; return -1;
} }
} }
fclose(fp); fclose(fp);
free(data);
if (rename(temp_path, path) != 0) if (rename(temp_path, path) != 0) {
return -1; return -1;
}
return 0; return 0;
} }