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Check write permissions when decrypting game file

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This commit is contained in:
d0k3 2016-12-13 14:48:44 +01:00
parent 9eb80b375a
commit 236e037229
1 changed files with 18 additions and 6 deletions
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24
source/game/gameutil.c
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@ -1,6 +1,7 @@
#include "gameutil.h"
#include "game.h"
#include "ui.h"
#include "fsperm.h"
#include "filetype.h"
#include "sddata.h"
#include "aes.h"
@ -13,7 +14,7 @@ u32 GetOutputPath(char* dest, const char* path, const char* ext) {
u32 tid_high, tid_low, app_id;
char drv;
if ((sscanf(path, "%c:/title/%08lx/%08lx/content/%08lx", &drv, &tid_high, &tid_low, &app_id) == 4) &&
(strnlen(path, 256) == 2 + 1 + 5 + + 1 + 8 + 1 + 8 + 1 + 7 + 1 + 8 + 1 + 3)) { // confused? ^_^
(strnlen(path, 256) == (1+1+1) + (5+1) + (8+1) + (8+1) + (7+1) + (8+1+3))) { // confused? ^_^
if (!ext) snprintf(dest, 256, "%s/%08lx%08lx.%08lx.app", OUTPUT_PATH, tid_high, tid_low, app_id);
else snprintf(dest, 256, "%s/%08lx%08lx.%s", OUTPUT_PATH, tid_high, tid_low, ext);
return 0;
@ -23,11 +24,13 @@ u32 GetOutputPath(char* dest, const char* path, const char* ext) {
// handling for everything else
char* name = strrchr(path, '/');
if (!name) return 1;
snprintf(dest, 256, "%s/%s%s%s", OUTPUT_PATH, ++name, ext ? "." : "", ext ? ext : "");
// ensure the output dir exists
if ((f_stat(OUTPUT_PATH, NULL) != FR_OK) && (f_mkdir(OUTPUT_PATH) != FR_OK))
return 1;
snprintf(dest, 256, "%s/%s", OUTPUT_PATH, ++name);
if (ext) { // replace extension
char* dot = strrchr(dest, '.');
if (!dot || ((dot - dest) <= (int) strnlen(OUTPUT_PATH, 256) + 1))
dot = dest + strnlen(dest, 256);
snprintf(dot, 8, ".%s", ext);
}
return 0;
}
@ -582,6 +585,15 @@ u32 DecryptGameFile(const char* path, bool inplace) {
destptr = dest;
}
if (!CheckWritePermissions(destptr))
return 1;
if (!inplace) {
// ensure the output dir exists
if ((f_stat(OUTPUT_PATH, NULL) != FR_OK) && (f_mkdir(OUTPUT_PATH) != FR_OK))
return 1;
}
if (filetype & GAME_CIA)
ret = DecryptCiaFile(path, destptr);
else if (filetype & (GAME_NCCH|GAME_NCSD))