mirror of
https://github.com/RPCS3/rpcs3.git
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PKG decryption without the intermediate
This commit is contained in:
Nekotekina
parent
07b9379a7c
commit
8b3c250702
@ -14,16 +14,15 @@
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#pragma warning(pop)
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#include "define_new_memleakdetect.h"
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// Decryption.
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bool CheckHeader(const fs::file& pkg_f, PKGHeader* m_header)
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static bool CheckHeader(const fs::file& pkg_f, PKGHeader& header)
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{
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if (m_header->pkg_magic != 0x7F504B47)
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if (header.pkg_magic != 0x7F504B47)
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{
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LOG_ERROR(LOADER, "PKG: Not a package file!");
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return false;
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}
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switch (const u16 type = m_header->pkg_type)
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switch (const u16 type = header.pkg_type)
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{
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case PKG_RELEASE_TYPE_DEBUG: break;
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case PKG_RELEASE_TYPE_RELEASE: break;
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@ -34,7 +33,7 @@ bool CheckHeader(const fs::file& pkg_f, PKGHeader* m_header)
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}
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}
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switch (const u16 platform = m_header->pkg_platform)
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switch (const u16 platform = header.pkg_platform)
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{
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case PKG_PLATFORM_TYPE_PS3: break;
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case PKG_PLATFORM_TYPE_PSP: break;
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@ -45,46 +44,43 @@ bool CheckHeader(const fs::file& pkg_f, PKGHeader* m_header)
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}
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}
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if (m_header->header_size != PKG_HEADER_SIZE && m_header->header_size != PKG_HEADER_SIZE2)
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if (header.header_size != PKG_HEADER_SIZE && header.header_size != PKG_HEADER_SIZE2)
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{
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LOG_ERROR(LOADER, "PKG: Wrong header size (0x%x)", m_header->header_size);
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LOG_ERROR(LOADER, "PKG: Wrong header size (0x%x)", header.header_size);
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return false;
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}
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if (m_header->pkg_size != pkg_f.size())
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if (header.pkg_size > pkg_f.size())
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{
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LOG_ERROR(LOADER, "PKG: File size mismatch (pkg_size=0x%llx)", m_header->pkg_size);
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//return false;
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LOG_ERROR(LOADER, "PKG: File size mismatch (pkg_size=0x%llx)", header.pkg_size);
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return false;
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}
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if (m_header->data_size + m_header->data_offset > m_header->pkg_size)
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if (header.data_size + header.data_offset > header.pkg_size)
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{
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LOG_ERROR(LOADER, "PKG: Data size mismatch (data_size=0x%llx, data_offset=0x%llx, file_size=0x%llx)", m_header->data_size, m_header->data_offset, m_header->pkg_size);
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//return false;
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LOG_ERROR(LOADER, "PKG: Data size mismatch (data_size=0x%llx, data_offset=0x%llx, file_size=0x%llx)", header.data_size, header.data_offset, header.pkg_size);
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return false;
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}
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return true;
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}
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bool LoadHeader(const fs::file& pkg_f, PKGHeader* m_header)
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// PKG Decryption
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bool Unpack(const fs::file& pkg_f, std::string dir)
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{
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pkg_f.seek(0);
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if (pkg_f.read(m_header, sizeof(PKGHeader)) != sizeof(PKGHeader))
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// Save current file offset (probably zero)
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const u64 start_offset = pkg_f.seek(0, from_cur);
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// Get basic PKG information
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PKGHeader header;
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if (pkg_f.read(&header, sizeof(PKGHeader)) != sizeof(PKGHeader))
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{
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LOG_ERROR(LOADER, "PKG: Package file is too short!");
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return false;
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}
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if (!CheckHeader(pkg_f, m_header))
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return false;
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return true;
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}
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bool Decrypt(const fs::file& pkg_f, const fs::file& dec_pkg_f, PKGHeader* m_header, std::vector<PKGEntry>& entries)
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{
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if (!LoadHeader(pkg_f, m_header))
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if (!CheckHeader(pkg_f, header))
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{
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return false;
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}
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@ -95,35 +91,32 @@ bool Decrypt(const fs::file& pkg_f, const fs::file& dec_pkg_f, PKGHeader* m_head
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be_t<u64>& hi = (be_t<u64>&)iv[0];
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be_t<u64>& lo = (be_t<u64>&)iv[8];
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auto buf = std::make_unique<u8[]>(BUF_SIZE);
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auto ctr = std::make_unique<u8[]>(BUF_SIZE);
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// Allocate buffers with BUF_SIZE size or more if required
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const u64 buffer_size = std::max<u64>(BUF_SIZE, sizeof(PKGEntry) * header.file_count);
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const std::unique_ptr<u8[]> buf(new u8[buffer_size]), ctr(new u8[buffer_size]);
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dec_pkg_f.trunc(pkg_f.size());
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// Debug key
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u8 key[0x40] = {};
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memcpy(key+0x00, &m_header->qa_digest[0], 8); // &data[0x60]
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memcpy(key+0x08, &m_header->qa_digest[0], 8); // &data[0x60]
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memcpy(key+0x10, &m_header->qa_digest[8], 8); // &data[0x68]
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memcpy(key+0x18, &m_header->qa_digest[8], 8); // &data[0x68]
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memcpy(key + 0x00, &header.qa_digest[0], 8); // &data[0x60]
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memcpy(key + 0x08, &header.qa_digest[0], 8); // &data[0x60]
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memcpy(key + 0x10, &header.qa_digest[8], 8); // &data[0x68]
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memcpy(key + 0x18, &header.qa_digest[8], 8); // &data[0x68]
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auto decrypt = [&](std::size_t offset, std::size_t size, bool psp)
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// Define decryption subfunction (`psp` arg selects the key for specific block)
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auto decrypt = [&](u64 offset, u64 size, bool psp)
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{
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if (size > BUF_SIZE)
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{
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buf = std::make_unique<u8[]>(size);
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ctr = std::make_unique<u8[]>(size);
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}
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// Initialize buffer
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std::memset(buf.get(), 0, size);
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pkg_f.seek(m_header->data_offset + offset);
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// Read the data
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pkg_f.seek(start_offset + header.data_offset + offset);
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size = pkg_f.read(buf.get(), size);
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const u32 bits = (size + HASH_LEN - 1) / HASH_LEN;
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const u64 bits = (size + HASH_LEN - 1) / HASH_LEN;
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if (m_header->pkg_type == PKG_RELEASE_TYPE_DEBUG)
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if (header.pkg_type == PKG_RELEASE_TYPE_DEBUG)
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{
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for (u32 j = 0; j < bits; j++)
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for (u64 j = 0; j < bits; j++)
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{
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u8 hash[0x14];
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sha1(key, 0x40, hash);
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@ -133,15 +126,17 @@ bool Decrypt(const fs::file& pkg_f, const fs::file& dec_pkg_f, PKGHeader* m_head
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}
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}
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if (m_header->pkg_type == PKG_RELEASE_TYPE_RELEASE)
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if (header.pkg_type == PKG_RELEASE_TYPE_RELEASE)
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{
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// Set decryption key
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aes_setkey_enc(&c, psp ? PKG_AES_KEY2 : PKG_AES_KEY, 128);
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memcpy(iv, m_header->klicensee, sizeof(iv));
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// Initialize `iv` for the specific position
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memcpy(iv, header.klicensee, sizeof(iv));
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if (lo + offset / HASH_LEN < lo) hi++;
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lo += offset / HASH_LEN;
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for (u32 j = 0; j < bits; j++)
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for (u64 j = 0; j < bits; j++)
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{
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aes_crypt_ecb(&c, AES_ENCRYPT, iv, ctr.get() + j * HASH_LEN);
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@ -151,33 +146,84 @@ bool Decrypt(const fs::file& pkg_f, const fs::file& dec_pkg_f, PKGHeader* m_head
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}
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}
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for (u32 j = 0; j < size; j++)
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for (u64 j = 0; j < size; j++)
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{
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buf[j] ^= ctr[j];
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}
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}
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dec_pkg_f.seek(offset);
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dec_pkg_f.write(buf.get(), size);
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};
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wxProgressDialog pdlg("PKG Decrypter / Installer", "Please wait, decrypting...", m_header->file_count, 0, wxPD_AUTO_HIDE | wxPD_APP_MODAL);
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wxProgressDialog pdlg("PKG Decrypter / Installer", "Please wait, decrypting...", header.file_count, 0, wxPD_AUTO_HIDE | wxPD_APP_MODAL);
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decrypt(0, m_header->file_count * sizeof(PKGEntry), m_header->pkg_platform == PKG_PLATFORM_TYPE_PSP);
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decrypt(0, header.file_count * sizeof(PKGEntry), header.pkg_platform == PKG_PLATFORM_TYPE_PSP);
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std::vector<PKGEntry> entries(header.file_count);
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std::memcpy(entries.data(), buf.get(), entries.size() * sizeof(PKGEntry));
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entries.resize(m_header->file_count);
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dec_pkg_f.seek(0);
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dec_pkg_f.read(entries.data(), m_header->file_count * sizeof(PKGEntry));
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for (s32 i = 0; i < entries.size(); i++)
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{
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const bool is_psp = (entries[i].type & PKG_FILE_ENTRY_PSP) != 0;
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const PKGEntry& entry = entries[i];
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decrypt(entries[i].name_offset, entries[i].name_size, is_psp);
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const bool is_psp = (entry.type & PKG_FILE_ENTRY_PSP) != 0;
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for (u64 j = 0; j < entries[i].file_size; j += BUF_SIZE)
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decrypt(entry.name_offset, entry.name_size, is_psp);
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const std::string name(reinterpret_cast<char*>(buf.get()), entry.name_size);
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switch (entry.type & 0xff)
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{
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decrypt(entries[i].file_offset + j, std::min<u64>(entries[i].file_size - j, BUF_SIZE), is_psp);
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case PKG_FILE_ENTRY_NPDRM:
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case PKG_FILE_ENTRY_NPDRMEDAT:
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case PKG_FILE_ENTRY_SDAT:
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case PKG_FILE_ENTRY_REGULAR:
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case PKG_FILE_ENTRY_UNK1:
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{
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const std::string path = dir + name;
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if (fs::is_file(path))
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{
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LOG_WARNING(LOADER, "PKG Loader: '%s' is overwritten", path);
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}
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if (fs::file out{ path, o_write | o_create | o_trunc })
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{
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for (u64 pos = 0; pos < entry.file_size; pos += BUF_SIZE)
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{
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const u64 block_size = std::min<u64>(BUF_SIZE, entry.file_size - pos);
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decrypt(entry.file_offset + pos, block_size, is_psp);
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out.write(buf.get(), block_size);
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}
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}
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else
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{
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LOG_ERROR(LOADER, "PKG Loader: Could not create file '%s'", path);
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return false;
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}
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break;
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}
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case PKG_FILE_ENTRY_FOLDER:
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{
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const std::string path = dir + name;
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if (!fs::is_dir(path) && !fs::create_dir(path))
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{
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LOG_ERROR(LOADER, "PKG Loader: Could not create directory: %s", path);
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return false;
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}
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break;
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}
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default:
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{
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LOG_ERROR(LOADER, "PKG Loader: unknown PKG file entry: 0x%x", entry.type);
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return false;
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}
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}
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pdlg.Update(i + 1);
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@ -185,103 +231,3 @@ bool Decrypt(const fs::file& pkg_f, const fs::file& dec_pkg_f, PKGHeader* m_head
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return true;
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}
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// Unpacking.
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bool UnpackEntry(const fs::file& dec_pkg_f, const PKGEntry& entry, std::string dir)
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{
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auto buf = std::make_unique<char[]>(BUF_SIZE);
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dec_pkg_f.seek(entry.name_offset);
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dec_pkg_f.read(buf.get(), entry.name_size);
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buf[entry.name_size] = 0;
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switch (entry.type & 0xff)
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{
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case PKG_FILE_ENTRY_NPDRM:
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case PKG_FILE_ENTRY_NPDRMEDAT:
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case PKG_FILE_ENTRY_SDAT:
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case PKG_FILE_ENTRY_REGULAR:
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case PKG_FILE_ENTRY_UNK1:
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{
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const std::string path = dir + std::string(buf.get(), entry.name_size);
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if (fs::is_file(path))
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{
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LOG_WARNING(LOADER, "PKG Loader: '%s' is overwritten", path);
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}
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fs::file out(path, o_write | o_create | o_trunc);
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if (out)
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{
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dec_pkg_f.seek(entry.file_offset);
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for (u64 i = 0; i < entry.file_size; i += BUF_SIZE)
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{
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const u64 size = std::min<u64>(BUF_SIZE, entry.file_size - i);
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dec_pkg_f.read(buf.get(), size);
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out.write(buf.get(), size);
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}
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return true;
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}
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else
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{
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LOG_ERROR(LOADER, "PKG Loader: Could not create file '%s'", path);
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return false;
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}
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}
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case PKG_FILE_ENTRY_FOLDER:
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{
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const std::string path = dir + std::string(buf.get(), entry.name_size);
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if (!fs::is_dir(path) && !fs::create_dir(path))
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{
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LOG_ERROR(LOADER, "PKG Loader: Could not create directory: %s", path);
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return false;
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}
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return true;
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}
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default:
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{
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LOG_ERROR(LOADER, "PKG Loader: unknown PKG file entry: 0x%x", entry.type);
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return false;
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}
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}
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}
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bool Unpack(const fs::file& pkg_f, std::string src, std::string dst)
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{
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PKGHeader* m_header = (PKGHeader*) malloc (sizeof(PKGHeader));
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// TODO: This shouldn't use current dir
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std::string decryptedFile = "./dev_hdd1/" + src + ".dec";
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fs::file dec_pkg_f(decryptedFile, o_read | o_write | o_create | o_trunc);
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std::vector<PKGEntry> m_entries;
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if (!Decrypt(pkg_f, dec_pkg_f, m_header, m_entries))
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{
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return false;
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}
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wxProgressDialog pdlg("PKG Decrypter / Installer", "Please wait, unpacking...", m_entries.size(), 0, wxPD_AUTO_HIDE | wxPD_APP_MODAL);
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for (const auto& entry : m_entries)
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{
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UnpackEntry(dec_pkg_f, entry, dst + src + "/");
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pdlg.Update(pdlg.GetValue() + 1);
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}
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pdlg.Update(m_entries.size());
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dec_pkg_f.close();
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fs::remove_file(decryptedFile);
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return true;
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}
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@ -61,4 +61,4 @@ struct PKGEntry
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namespace fs { struct file; }
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bool Unpack(const fs::file& dec_pkg_f, std::string src, std::string dst);
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bool Unpack(const fs::file& pkg_f, std::string dir);
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@ -17,6 +17,7 @@ bool PKGLoader::Install(const fs::file& pkg_f, std::string dest)
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char title_id[48];
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pkg_f.seek(48);
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pkg_f.read(title_id, 48);
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pkg_f.seek(0);
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std::string titleID = std::string(title_id).substr(7, 9);
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@ -35,7 +36,7 @@ bool PKGLoader::Install(const fs::file& pkg_f, std::string dest)
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}
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// Decrypt and unpack the PKG file.
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if (!Unpack(pkg_f, titleID, dest))
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if (!Unpack(pkg_f, dest + titleID + "/"))
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{
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LOG_ERROR(LOADER, "PKG Loader: Failed to install package!");
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return false;
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