nstool/lib/libhac/source/GameCardUtils.cpp
2018-10-27 14:13:53 +08:00

22 lines
630 B
C++

#include <nn/hac/GameCardUtils.h>
void nn::hac::GameCardUtils::getXciHeaderAesIv(const nn::hac::sGcHeader* hdr, byte_t* iv)
{
for (size_t i = 0; i < 16; i++)
{
iv[15-i] = hdr->aescbc_iv.iv[i];
}
}
void nn::hac::GameCardUtils::decryptXciHeader(const byte_t* src, byte_t* dst, const byte_t* key)
{
byte_t iv[fnd::aes::kAesBlockSize];
getXciHeaderAesIv((const nn::hac::sGcHeader*)src, iv);
// copy plain
memcpy(dst, src, nn::hac::gc::kHeaderEncOffset);
// decrypt encrypted data
fnd::aes::AesCbcDecrypt(src + nn::hac::gc::kHeaderEncOffset, nn::hac::gc::kHeaderEncSize, key, iv, dst + nn::hac::gc::kHeaderEncOffset);
}