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Support for Wii U VC NFS images

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This commit is contained in:
Jack Andersen
2019-11-23 17:24:33 -10:00
parent 11a0351d1c
commit 75fc574f81
8 changed files with 333 additions and 42 deletions
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36
lib/DiscWii.cpp
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@@ -332,14 +332,22 @@ public:
uint8_t m_decBuf[0x7c00];
void decryptBlock() {
m_dio->read(m_encBuf, 0x8000);
m_aes->decrypt(&m_encBuf[0x3d0], &m_encBuf[0x400], m_decBuf, 0x7c00);
if (m_aes) {
m_dio->read(m_encBuf, 0x8000);
m_aes->decrypt(&m_encBuf[0x3d0], &m_encBuf[0x400], m_decBuf, 0x7c00);
} else {
m_dio->seek(0x400, SEEK_CUR);
m_dio->read(m_decBuf, 0x7c00);
}
}
public:
PartReadStream(const PartitionWii& parent, uint64_t baseOffset, uint64_t offset, bool& err)
: m_aes(NewAES()), m_parent(parent), m_baseOffset(baseOffset), m_offset(offset) {
m_aes->setKey(parent.m_decKey);
: m_parent(parent), m_baseOffset(baseOffset), m_offset(offset) {
if (m_parent.m_parent.getDiscIO().hasWiiCrypto()) {
m_aes = NewAES();
m_aes->setKey(parent.m_decKey);
}
size_t block = m_offset / 0x7c00;
m_dio = m_parent.m_parent.getDiscIO().beginReadStream(m_baseOffset + block * 0x8000);
if (!m_dio) {
@@ -365,27 +373,25 @@ public:
}
uint64_t position() const override { return m_offset; }
uint64_t read(void* buf, uint64_t length) override {
size_t block = m_offset / 0x7c00;
size_t cacheOffset = m_offset % 0x7c00;
uint64_t cacheSize;
auto blockAndRemOff = std::lldiv(m_offset, 0x7c00);
uint64_t rem = length;
uint8_t* dst = (uint8_t*)buf;
while (rem) {
if (block != m_curBlock) {
if (blockAndRemOff.quot != m_curBlock) {
decryptBlock();
m_curBlock = block;
m_curBlock = blockAndRemOff.quot;
}
cacheSize = rem;
if (cacheSize + cacheOffset > 0x7c00)
cacheSize = 0x7c00 - cacheOffset;
uint64_t cacheSize = rem;
if (cacheSize + blockAndRemOff.rem > 0x7c00)
cacheSize = 0x7c00 - blockAndRemOff.rem;
memmove(dst, m_decBuf + cacheOffset, cacheSize);
memmove(dst, m_decBuf + blockAndRemOff.rem, cacheSize);
dst += cacheSize;
rem -= cacheSize;
cacheOffset = 0;
++block;
blockAndRemOff.rem = 0;
++blockAndRemOff.quot;
}
m_offset += length;