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add salvage-gci action

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This commit is contained in:
Martin Michelsen
2023-05-07 21:33:12 -07:00
parent 8dc5e9f281
commit 90a3be7803
3 changed files with 170 additions and 16 deletions
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src/SaveFileFormats.cc
+16 -2
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@@ -70,8 +70,7 @@ void PSOGCIFileHeader::check() const {
if (this->game_id[1] != 'P') {
throw runtime_error("GCI file is not for Phantasy Star Online");
}
if ((this->game_id[1] != 'P') ||
((this->game_id[2] != 'S') && (this->game_id[2] != 'O'))) {
if ((this->game_id[2] != 'S') && (this->game_id[2] != 'O')) {
throw runtime_error("GCI file is not for Phantasy Star Online");
}
}
@@ -101,3 +100,18 @@ uint32_t compute_psogc_timestamp(
uint32_t res_day = (day - 1) + year_start_day + month_start_day[month - 1];
return second + (minute + (hour + (res_day * 24)) * 60) * 60;
}
string decrypt_gci_fixed_size_file_data_section_for_salvage(
const void* data_section,
size_t size,
uint32_t round1_seed,
uint64_t round2_seed,
size_t max_decrypt_bytes) {
string decrypted = decrypt_gci_or_vms_v2_data_section<true>(
data_section, size, round1_seed, max_decrypt_bytes);
PSOV2Encryption round2_crypt(round2_seed);
round2_crypt.encrypt_big_endian(decrypted.data(), decrypted.size());
return decrypted;
}