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implement save file decryption/encryption

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This commit is contained in:
Martin Michelsen
2023-03-31 23:56:25 -07:00
parent 06ba95ed97
commit 3b9a76eec8
39 changed files with 666 additions and 205 deletions
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src/BMLArchive.cc
+16 -12
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@@ -10,33 +10,37 @@ using namespace std;
template <typename LongT>
template <bool IsBigEndian>
struct BMLHeader {
using U32T = typename std::conditional<IsBigEndian, be_uint32_t, le_uint32_t>::type;
parray<uint8_t, 0x04> unknown_a1;
LongT num_entries;
U32T num_entries;
parray<uint8_t, 0x38> unknown_a2;
} __attribute__((packed));
template <typename LongT>
template <bool IsBigEndian>
struct BMLHeaderEntry {
using U32T = typename std::conditional<IsBigEndian, be_uint32_t, le_uint32_t>::type;
ptext<char, 0x20> filename;
LongT compressed_size;
U32T compressed_size;
parray<uint8_t, 0x04> unknown_a1;
LongT decompressed_size;
LongT compressed_gvm_size;
LongT decompressed_gvm_size;
U32T decompressed_size;
U32T compressed_gvm_size;
U32T decompressed_gvm_size;
parray<uint8_t, 0x0C> unknown_a2;
} __attribute__((packed));
template <typename LongT>
template <bool IsBigEndian>
void BMLArchive::load_t() {
StringReader r(*this->data);
const auto& header = r.get<BMLHeader<LongT>>();
const auto& header = r.get<BMLHeader<IsBigEndian>>();
size_t offset = 0x800;
while (this->entries.size() < header.num_entries) {
const auto& entry = r.get<BMLHeaderEntry<LongT>>();
const auto& entry = r.get<BMLHeaderEntry<IsBigEndian>>();
if (offset + entry.compressed_size > this->data->size()) {
throw runtime_error("BML data entry extends beyond end of data");
@@ -58,9 +62,9 @@ void BMLArchive::load_t() {
BMLArchive::BMLArchive(shared_ptr<const string> data, bool big_endian)
: data(data) {
if (big_endian) {
this->load_t<be_uint32_t>();
this->load_t<true>();
} else {
this->load_t<le_uint32_t>();
this->load_t<false>();
}
}