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ncch_container: support encrypted games

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This commit is contained in:
wwylele
2018-07-28 18:30:54 +03:00
parent b92660435c
commit d4a808c885
17 changed files with 319 additions and 103 deletions
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38
src/core/file_sys/ncch_container.h
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@ -13,6 +13,7 @@
#include "common/file_util.h"
#include "common/swap.h"
#include "core/core.h"
#include "core/file_sys/romfs_reader.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
/// NCCH header (Note: "NCCH" appears to be a publicly unknown acronym)
@ -32,7 +33,28 @@ struct NCCH_Header {
u8 extended_header_hash[0x20];
u32_le extended_header_size;
u8 reserved_2[4];
u8 flags[8];
u8 reserved_flag[3];
u8 secondary_key_slot;
u8 platform;
enum class ContentType : u8 {
Application = 0,
SystemUpdate = 1,
Manual = 2,
Child = 3,
Trial = 4,
};
union {
BitField<0, 1, u8> is_data;
BitField<1, 1, u8> is_executable;
BitField<2, 3, ContentType> content_type;
};
u8 content_unit_size;
union {
BitField<0, 1, u8> fixed_key;
BitField<1, 1, u8> no_romfs;
BitField<2, 1, u8> no_crypto;
BitField<5, 1, u8> seed_crypto;
};
u32_le plain_region_offset;
u32_le plain_region_size;
u32_le logo_region_offset;
@ -211,8 +233,7 @@ public:
* @param size The size of the romfs
* @return ResultStatus result of function
*/
Loader::ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
u64& size);
Loader::ResultStatus ReadRomFS(std::shared_ptr<RomFSReader>& romfs_file);
/**
* Get the override RomFS of the NCCH container
@ -222,8 +243,7 @@ public:
* @param size The size of the romfs
* @return ResultStatus result of function
*/
Loader::ResultStatus ReadOverrideRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file,
u64& offset, u64& size);
Loader::ResultStatus ReadOverrideRomFS(std::shared_ptr<RomFSReader>& romfs_file);
/**
* Get the Program ID of the NCCH container
@ -263,6 +283,14 @@ private:
bool is_loaded = false;
bool is_compressed = false;
bool is_encrypted = false;
// for decrypting exheader, exefs header and icon/banner section
std::array<u8, 16> primary_key{};
std::array<u8, 16> secondary_key{}; // for decrypting romfs and .code section
std::array<u8, 16> exheader_ctr{};
std::array<u8, 16> exefs_ctr{};
std::array<u8, 16> romfs_ctr{};
u32 ncch_offset = 0; // Offset to NCCH header, can be 0 for NCCHs or non-zero for CIAs/NCSDs
u32 exefs_offset = 0;