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79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
#pragma once
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#include "common.h"
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#include "exefs.h"
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#define NCCH_MEDIA_UNIT 0x200
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#define NCCH_EXTHDR_SIZE 0x800 // NCCH header says 0x400, which is not the full thing
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#define NCCH_EXTHDR_OFFSET 0x200
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#define NCCH_ENCRYPTED(ncch) (!((ncch)->flags[7] & 0x04))
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#define NCCH_IS_CXI(ncch) ((ncch)->flags[5] & 0x02)
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#define NCCH_NOCRYPTO 0x0004
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#define NCCH_STDCRYPTO 0x0000
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#define NCCH_GET_CRYPTO(ncch) (!NCCH_ENCRYPTED(ncch) ? NCCH_NOCRYPTO : (((ncch)->flags[3] << 8) | ((ncch)->flags[7]&(0x01|0x20))))
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// wrapper defines
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#define DecryptNcch(data, offset, size, ncch, exefs) CryptNcch(data, offset, size, ncch, exefs, NCCH_NOCRYPTO)
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#define EncryptNcch(data, offset, size, ncch, exefs, crypto) CryptNcch(data, offset, size, ncch, exefs, crypto)
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#define DecryptNcchSequential(data, offset, size) CryptNcchSequential(data, offset, size, NCCH_NOCRYPTO)
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#define EncryptNcchSequential(data, offset, size, crypto) CryptNcchSequential(data, offset, size, crypto)
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// see: https://www.3dbrew.org/wiki/NCCH/Extended_Header
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// very limited, contains only required stuff
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typedef struct {
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char name[8];
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u8 reserved[0x5];
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u8 flag; // bit 1 for SD
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u16 remaster_version;
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u8 sci_data[0x30];
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u8 dependencies[0x180];
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u8 sys_info[0x40];
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u8 aci_data[0x200];
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u8 signature[0x100];
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u8 public_key[0x100];
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u8 aci_limit_data[0x200];
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} __attribute__((packed)) NcchExtHeader;
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// see: https://www.3dbrew.org/wiki/NCCH#NCCH_Header
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typedef struct {
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u8 signature[0x100];
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u8 magic[0x4];
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u32 size;
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u64 partitionId;
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u16 makercode;
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u16 version;
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u32 hash_seed;
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u64 programId;
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u8 reserved0[0x10];
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u8 hash_logo[0x20];
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char productcode[0x10];
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u8 hash_exthdr[0x20];
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u32 size_exthdr;
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u8 reserved1[0x4];
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u8 flags[0x8];
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u32 offset_plain;
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u32 size_plain;
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u32 offset_logo;
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u32 size_logo;
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u32 offset_exefs;
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u32 size_exefs;
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u32 size_exefs_hash;
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u8 reserved2[0x4];
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u32 offset_romfs;
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u32 size_romfs;
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u32 size_romfs_hash;
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u8 reserved3[0x4];
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u8 hash_exefs[0x20];
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u8 hash_romfs[0x20];
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} __attribute__((packed, aligned(16))) NcchHeader;
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u32 ValidateNcchHeader(NcchHeader* header);
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u32 SetNcchKey(NcchHeader* ncch, u16 crypto, u32 keyid);
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u32 SetupNcchCrypto(NcchHeader* ncch, u16 crypt_to);
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u32 CryptNcch(u8* data, u32 offset, u32 size, NcchHeader* ncch, ExeFsHeader* exefs, u16 crypto);
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u32 CryptNcchSequential(u8* data, u32 offset, u32 size, u16 crypto);
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u32 SetNcchSdFlag(u8* data);
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