mirror of
https://github.com/hrydgard/ppsspp.git
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Henrik RydgårdandClaude Opus 5.5
179595c8f7
The download (a DRM BB install package) is installed by the game's boot program only when it's started with -i, which nothing does any more. PPSSPP now installs it itself when the game boots, the way psheet does. Unpacking the package needs only known keys: a fixed one from psheet, and the secure install ID, which comes out of the package's MAC. The module inside is a type 3 PRX whose first step is encrypted for KIRK command 2, with a key that isn't known. Command 2's result is the same on every PSP, though, so it is now stored for the EU and US modules (taken on a PSP through sceMesgIns_driver_D062B635, the call the install makes, and cross-checked against an install). The type 3 decrypt uses it in place of that step, so the installed module needs no Fuse ID. --re-decrypt also takes such a package now. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
94 lines
3.6 KiB
C++
94 lines
3.6 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include <string>
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#include <string_view>
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#include <vector>
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#include "Common/Common.h"
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#include "Common/CommonTypes.h"
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#include "Common/Swap.h" // PSP_Header below is all _le types.
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#ifdef _MSC_VER
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#pragma pack(push, 1)
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#endif
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typedef struct
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{
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u32_le signature; // 0
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u16_le attribute; // 4 modinfo
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u16_le comp_attribute; // 6
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u8 module_ver_lo; // 8
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u8 module_ver_hi; // 9
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char modname[28]; // 0A
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u8 version; // 26
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u8 nsegments; // 27
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u32_le elf_size; // 28
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u32_le psp_size; // 2C
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u32_le entry; // 30
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u32_le modinfo_offset; // 34
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s32_le bss_size; // 38
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u16_le seg_align[4]; // 3C
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u32_le seg_address[4]; // 44
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s32_le seg_size[4]; // 54
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u32_le reserved[5]; // 64
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u32_le devkitversion; // 78
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u32_le decrypt_mode; // 7C
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u8 key_data0[0x30]; // 80
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s32_le comp_size; // B0
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s32_le _80; // B4
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s32_le reserved2[2]; // B8
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u8 key_data1[0x10]; // C0
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u32_le tag; // D0
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u8 scheck[0x58]; // D4
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u32_le key_data2; // 12C
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u32_le oe_tag; // 130
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u8 key_data3[0x1C]; // 134
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#ifdef _MSC_VER
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} PSP_Header;
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#else
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} __attribute__((packed)) PSP_Header;
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#endif
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#ifdef _MSC_VER
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#pragma pack(pop)
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#endif
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// fuseId is the PSP's Fuse ID, the words at 0xBC100090 and 0xBC100094. Only a game patch installed
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// on a PSP needs it (seed is its secure install ID then).
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int pspDecryptPRX(const u8 *inbuf, u8 *outbuf, u32 size, const u8 *seed = nullptr, const u32 *fuseId = nullptr);
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// A module installed by the DRM BB install utility (sceKernelLoadModuleDNAS) is a PGD around a type 3
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// PRX, both keyed to the console by its Fuse ID and to the game by the secure install ID it passes.
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// Replaces data with the PGD's contents; false if it doesn't open with these.
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bool pspUnwrapDNASPGD(std::vector<u8> &data, const u8 *secureId, const u32 *fuseId);
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// A DRM BB install package is the EBOOT.PBP of a game patch download, which the install utility
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// (psheet) unpacks onto the memory stick. A .PRX in it comes out as the type 3 module before the
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// install's console-specific step, which pspDecryptPRX can still decrypt if it knows that step's
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// result for the module. secureId is the game's secure install ID, or null to take it from the
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// package's MAC; it's returned in secureIdOut if that's given. False if the package doesn't check out.
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struct DrmBBFile {
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std::string name;
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std::vector<u8> data;
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};
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bool pspReadDrmBBPackage(const std::vector<u8> &pbp, const u8 *secureId, std::vector<DrmBBFile> &files, u8 *secureIdOut = nullptr);
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// A Fuse ID as PSP tools show it, 12 (or 16) hex digits with the 0xBC100094 word first.
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bool pspParseFuseId(std::string_view text, u32 fuseId[2]);
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