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Check CRC16s of banner and only use correct parts (#153)

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Pk11 2022-01-12 10:06:11 -06:00 committed by GitHub
parent 5408406626
commit 9be421880f
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1 changed files with 32 additions and 2 deletions
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34
arm9/source/ndsInfo.cpp
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@ -45,15 +45,45 @@ void ndsInfo(const char *path) {
u16 *iconPalette = new u16[8 * 0x10]; u16 *iconPalette = new u16[8 * 0x10];
u16 *iconAnimation = new u16[0x40](); // Initialize to 0 for DS icons u16 *iconAnimation = new u16[0x40](); // Initialize to 0 for DS icons
// Check CRC16s for ROM hacks with partly corrupted banners
u16 crc16[4];
u16 realCrc16[4];
u8 *buffer = new u8[0x1180];
fread(crc16, sizeof(u16), 4, file);
fseek(file, ofs + 0x20, SEEK_SET);
fread(buffer, 1, 0xA20, file);
realCrc16[0] = swiCRC16(0xFFFF, buffer, 0x820);
realCrc16[1] = swiCRC16(0xFFFF, buffer, 0x920);
realCrc16[2] = swiCRC16(0xFFFF, buffer, 0xA20);
fseek(file, ofs + 0x1240, SEEK_SET);
fread(buffer, 1, 0x1180, file);
realCrc16[3] = swiCRC16(0xFFFF, buffer, 0x1180);
delete[] buffer;
if(crc16[0] != realCrc16[0]) { // Base banner
fclose(file);
return;
} else if(crc16[1] != realCrc16[1]) { // Chinese
version = 0x0001;
} else if(crc16[2] != realCrc16[2]) { // Korean
version = 0x0002;
}
if(crc16[3] != realCrc16[3]) { // DSi
version &= ~0x100;
}
if(version == 0x0103) { // DSi if(version == 0x0103) { // DSi
fseek(file, 0x1240 - 2, SEEK_CUR); fseek(file, ofs + 0x1240, SEEK_SET);
fread(iconBitmap, 1, 8 * 0x200, file); fread(iconBitmap, 1, 8 * 0x200, file);
fread(iconPalette, 2, 8 * 0x10, file); fread(iconPalette, 2, 8 * 0x10, file);
fread(iconAnimation, 2, 0x40, file); fread(iconAnimation, 2, 0x40, file);
fseek(file, ofs + 0x240, SEEK_SET); fseek(file, ofs + 0x240, SEEK_SET);
} else if((version & ~3) == 0) { // DS } else if((version & ~3) == 0) { // DS
fseek(file, 0x20 - 2, SEEK_CUR); fseek(file, ofs + 0x20, SEEK_SET);
fread(iconBitmap, 1, 0x200, file); fread(iconBitmap, 1, 0x200, file);
fread(iconPalette, 2, 0x10, file); fread(iconPalette, 2, 0x10, file);
} else { } else {