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add PC save file formats and encrypt/decrypt functions

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This commit is contained in:
Martin Michelsen
2023-09-23 17:01:37 -07:00
parent 85897baaeb
commit cc70280761
30 changed files with 412 additions and 79 deletions
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src/PSOEncryption.cc
+27 -10
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@@ -40,36 +40,44 @@ template <bool IsBigEndian>
void PSOLFGEncryption::encrypt_t(void* vdata, size_t size, bool advance) {
using U32T = typename std::conditional<IsBigEndian, be_uint32_t, le_uint32_t>::type;
if (size & 3) {
throw invalid_argument("size must be a multiple of 4");
}
if (!advance && (size != 4)) {
throw logic_error("cannot peek-encrypt/decrypt with size > 4");
}
size >>= 2;
size_t uint32_count = size >> 2;
size_t extra_bytes = size & 3;
U32T* data = reinterpret_cast<U32T*>(vdata);
for (size_t x = 0; x < size; x++) {
for (size_t x = 0; x < uint32_count; x++) {
data[x] ^= this->next(advance);
}
if (extra_bytes) {
U32T last = 0;
memcpy(&last, &data[uint32_count], extra_bytes);
last ^= this->next(advance);
memcpy(&data[uint32_count], &last, extra_bytes);
}
}
template <bool IsBigEndian>
void PSOLFGEncryption::encrypt_minus_t(void* vdata, size_t size, bool advance) {
using U32T = typename std::conditional<IsBigEndian, be_uint32_t, le_uint32_t>::type;
if (size & 3) {
throw invalid_argument("size must be a multiple of 4");
}
if (!advance && (size != 4)) {
throw logic_error("cannot peek-encrypt/decrypt with size > 4");
}
size >>= 2;
size_t uint32_count = size >> 2;
size_t extra_bytes = size & 3;
U32T* data = reinterpret_cast<U32T*>(vdata);
for (size_t x = 0; x < size; x++) {
for (size_t x = 0; x < uint32_count; x++) {
data[x] = this->next(advance) - data[x];
}
if (extra_bytes) {
U32T last = 0;
memcpy(&last, &data[uint32_count], extra_bytes);
last = this->next(advance) - last;
memcpy(&data[uint32_count], &last, extra_bytes);
}
}
void PSOLFGEncryption::encrypt(void* vdata, size_t size, bool advance) {
@@ -975,3 +983,12 @@ std::u16string decrypt_challenge_rank_text(const std::u16string& data) {
std::u16string encrypt_challenge_rank_text(const std::u16string& data) {
return encrypt_challenge_rank_text(data.data(), data.size());
}
string decrypt_v2_registry_value(const void* data, size_t size) {
string ret(reinterpret_cast<const char*>(data), size);
PSOV2Encryption crypt(0x66);
for (size_t z = 0; z < size; z++) {
ret[z] ^= (crypt.next() & 0x7F);
}
return ret;
}