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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/Quest.cc
+9 -11
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@@ -83,10 +83,8 @@ struct PSOGCIDLQFileEncryptedHeader : PSOMemCardDLQFileEncryptedHeader<true> {
} __attribute__((packed));
template <bool IsBigEndian>
string decrypt_gci_or_vms_v2_download_quest_data_section(
const void* data_section, size_t size, uint32_t seed) {
string decrypted = decrypt_gci_or_vms_v2_data_section<IsBigEndian>(
data_section, size, seed);
string decrypt_download_quest_data_section(const void* data_section, size_t size, uint32_t seed) {
string decrypted = decrypt_data_section<IsBigEndian>(data_section, size, seed);
size_t orig_size = decrypted.size();
decrypted.resize((decrypted.size() + 3) & (~3));
@@ -161,13 +159,13 @@ string decrypt_vms_v1_data_section(const void* data_section, size_t size) {
}
template <bool IsBigEndian>
string find_seed_and_decrypt_gci_or_vms_v2_download_quest_data_section(
string find_seed_and_decrypt_download_quest_data_section(
const void* data_section, size_t size, size_t num_threads) {
mutex result_lock;
string result;
uint64_t result_seed = parallel_range<uint64_t>([&](uint64_t seed, size_t) {
try {
string ret = decrypt_gci_or_vms_v2_download_quest_data_section<IsBigEndian>(
string ret = decrypt_download_quest_data_section<IsBigEndian>(
data_section, size, seed);
lock_guard<mutex> g(result_lock);
result = std::move(ret);
@@ -530,11 +528,11 @@ string Quest::decode_gci_file(
// fields, so assume it's encrypted if any of them are nonzero.
if (dlq_header.round2_seed || dlq_header.checksum || dlq_header.round3_seed) {
if (known_seed >= 0) {
return decrypt_gci_or_vms_v2_download_quest_data_section<true>(
return decrypt_download_quest_data_section<true>(
r.getv(header.data_size), header.data_size, known_seed);
} else if (header.embedded_seed != 0) {
return decrypt_gci_or_vms_v2_download_quest_data_section<true>(
return decrypt_download_quest_data_section<true>(
r.getv(header.data_size), header.data_size, header.embedded_seed);
} else {
@@ -544,7 +542,7 @@ string Quest::decode_gci_file(
if (find_seed_num_threads == 0) {
find_seed_num_threads = thread::hardware_concurrency();
}
return find_seed_and_decrypt_gci_or_vms_v2_download_quest_data_section<true>(
return find_seed_and_decrypt_download_quest_data_section<true>(
r.getv(header.data_size), header.data_size, find_seed_num_threads);
}
@@ -617,7 +615,7 @@ string Quest::decode_vms_file(
}
if (known_seed >= 0) {
return decrypt_gci_or_vms_v2_download_quest_data_section<false>(
return decrypt_download_quest_data_section<false>(
data_section, header.data_size, known_seed);
} else {
@@ -627,7 +625,7 @@ string Quest::decode_vms_file(
if (find_seed_num_threads == 0) {
find_seed_num_threads = thread::hardware_concurrency();
}
return find_seed_and_decrypt_gci_or_vms_v2_download_quest_data_section<false>(
return find_seed_and_decrypt_download_quest_data_section<false>(
data_section, header.data_size, find_seed_num_threads);
}
}