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Edat / Sdata: On the fly decryption for edat, fix EDAT_FLAG_0x20 decryption

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This commit is contained in:
Jake 2017-03-10 03:06:36 -06:00
parent 596db2c29c
commit a6f8e4f6b3
7 changed files with 247 additions and 111 deletions
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50
rpcs3/Emu/Cell/Modules/sceNp.cpp
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@ -3,6 +3,7 @@
#include "Emu/Cell/PPUModule.h"
#include "Emu/Cell/lv2/sys_process.h"
#include "Emu/IdManager.h"
#include "Crypto/unedat.h"
#include "sceNp.h"
@ -47,7 +48,7 @@ s32 npDrmIsAvailable(vm::cptr<u8> k_licensee_addr, vm::cptr<char> drm_path)
}
std::string k_licensee_str = "0";
u8 k_licensee[0x10];
std::array<u8,0x10> k_licensee;
if (k_licensee_addr)
{
@ -58,20 +59,30 @@ s32 npDrmIsAvailable(vm::cptr<u8> k_licensee_addr, vm::cptr<char> drm_path)
}
}
const std::string& enc_drm_path_local = vfs::get(enc_drm_path);
const fs::file enc_file(vfs::get(enc_drm_path));
u32 magic;
enc_file.read<u32>(magic);
enc_file.seek(0);
if (magic != "NPD\0"_u32)
{
// for now assume its just unencrypted
sceNp.notice("npDrmIsAvailable(): Assuming edat file is unencrypted at %s", enc_drm_path);
return CELL_OK;
}
sceNp.warning("npDrmIsAvailable(): Found DRM license file at %s", enc_drm_path);
sceNp.warning("npDrmIsAvailable(): Using k_licensee 0x%s", k_licensee_str);
// Set the necessary file paths.
const std::string& drm_file_name = enc_drm_path.substr(enc_drm_path.find_last_of('/') + 1);
// TODO: Make more explicit what this actually does (currently it copies "XXXXXXXX" from drm_path (== "/dev_hdd0/game/XXXXXXXXX/*" assumed)
const std::string& drm_file_dir = enc_drm_path.substr(15);
const std::string& title_id = drm_file_dir.substr(0, drm_file_dir.find_first_of('/'));
const std::string& dec_drm_path = "/dev_hdd1/cache/" + drm_file_name;
std::string rap_lpath = vfs::get("/dev_hdd0/home/00000001/exdata/"); // TODO: Allow multiple profiles. Use default for now.
auto edatkeys = fxm::get_always<EdatKeys_t>();
// Search for a compatible RAP file.
for (const auto& entry : fs::dir(rap_lpath))
{
@ -85,24 +96,23 @@ s32 npDrmIsAvailable(vm::cptr<u8> k_licensee_addr, vm::cptr<char> drm_path)
if (rap_lpath.back() == '/')
{
sceNp.warning("npDrmIsAvailable(): Can't find RAP file for %s", enc_drm_path);
rap_lpath.clear();
edatkeys->rifKey.fill(0);
}
else
edatkeys->rifKey = GetEdatRifKeyFromRapFile(fs::file{ rap_lpath });
const std::string& enc_drm_path_local = vfs::get(enc_drm_path);
const fs::file enc_file(enc_drm_path_local);
if (const fs::file dec_file = DecryptEDAT(enc_file, enc_drm_path_local, 8, rap_lpath, k_licensee, false))
if (VerifyEDATHeaderWithKLicense(enc_file, enc_drm_path_local, k_licensee))
{
// If decryption succeeds, replace the encrypted file with it.
const std::string& dec_drm_path_local = vfs::get(dec_drm_path);
fs::file dec_out(dec_drm_path_local, fs::rewrite);
dec_out.write(dec_file.to_vector<u8>());
fs::remove_file(enc_drm_path_local);
fs::rename(dec_drm_path_local, enc_drm_path_local);
edatkeys->devKlic = std::move(k_licensee);
return CELL_OK;
}
else
{
sceNp.error("npDrmIsAvailable(): Failed to verify edat file %s", enc_drm_path);
edatkeys->devKlic.fill(0);
edatkeys->rifKey.fill(0);
return SCE_NP_DRM_ERROR_FORMAT;
}
return CELL_OK;
}