mirror of
https://github.com/d0k3/GodMode9.git
synced 2025-06-26 21:52:48 +00:00
101 lines
4.4 KiB
C
101 lines
4.4 KiB
C
#include "vmem.h"
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#include "unittype.h"
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#include "sha.h"
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#include "aes.h"
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#define VFLAG_PAYLOAD (1UL<<27)
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#define VFLAG_BOOT9 (1UL<<28)
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#define VFLAG_BOOT11 (1UL<<29)
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#define VFLAG_OTP (1UL<<30)
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#define VFLAG_N3DS_ONLY (1UL<<31)
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// offsets provided by SciresM
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#define BOOT9_POS 0x08080000
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#define BOOT11_POS 0x08090000
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#define BOOT9_LEN 0x00010000
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#define BOOT11_LEN 0x00010000
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// see: https://www.youtube.com/watch?v=wogNzUypLuI
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u8 boot9_sha256[0x20] = {
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0x2F, 0x88, 0x74, 0x4F, 0xEE, 0xD7, 0x17, 0x85, 0x63, 0x86, 0x40, 0x0A, 0x44, 0xBB, 0xA4, 0xB9,
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0xCA, 0x62, 0xE7, 0x6A, 0x32, 0xC7, 0x15, 0xD4, 0xF3, 0x09, 0xC3, 0x99, 0xBF, 0x28, 0x16, 0x6F
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};
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u8 boot11_sha256[0x20] = {
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0x74, 0xDA, 0xAC, 0xE1, 0xF8, 0x06, 0x7B, 0x66, 0xCC, 0x81, 0xFC, 0x30, 0x7A, 0x3F, 0xDB, 0x50,
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0x9C, 0xBE, 0xDC, 0x32, 0xF9, 0x03, 0xAE, 0xBE, 0x90, 0x61, 0x44, 0xDE, 0xA7, 0xA0, 0x75, 0x12
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};
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// see: https://github.com/SciresM/CTRAesEngine/blob/8312adc74b911a6b9cb9e03982ba3768b8e2e69c/CTRAesEngine/AesEngine.cs#L672-L688
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#define OTP_KEY ((u8*) BOOT9_POS + ((IS_DEVKIT) ? + 0xD700 : 0xD6E0))
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#define OTP_IV (OTP_KEY + 0x10)
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// see: http://3dbrew.org/wiki/Memory_layout#ARM9
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static const VirtualFile vMemFileTemplates[] = {
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{ "itcm.mem" , 0x01FF8000, 0x00008000, 0xFF, 0 },
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{ "arm9.mem" , 0x08000000, 0x00100000, 0xFF, 0 },
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{ "arm9ext.mem" , 0x08100000, 0x00080000, 0xFF, VFLAG_N3DS_ONLY },
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{ "boot9.bin" , BOOT9_POS , BOOT9_LEN , 0xFF, VFLAG_BOOT9 },
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{ "boot11.bin" , BOOT11_POS, BOOT11_LEN, 0xFF, VFLAG_BOOT11 },
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{ "vram.mem" , 0x18000000, 0x00600000, 0xFF, 0 },
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{ "dsp.mem" , 0x1FF00000, 0x00080000, 0xFF, 0 },
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{ "axiwram.mem" , 0x1FF80000, 0x00080000, 0xFF, 0 },
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{ "fcram.mem" , 0x20000000, 0x08000000, 0xFF, 0 },
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{ "fcramext.mem" , 0x28000000, 0x08000000, 0xFF, VFLAG_N3DS_ONLY },
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{ "dtcm.mem" , 0x30008000, 0x00004000, 0xFF, 0 },
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{ "otp.mem" , 0x10012000, 0x00000100, 0xFF, VFLAG_OTP },
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{ "otp_dec.mem" , 0x10012000, 0x00000100, 0x11, VFLAG_OTP | VFLAG_BOOT9 },
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// { "bootrom.mem" , 0xFFFF0000, 0x00010000, 0xFF, 0 },
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// { "bootrom_unp.mem" , 0xFFFF0000, 0x00008000, 0xFF, 0 },
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{ "godmode9.bin" , 0x23F00000, SELF_MAX_SIZE, 0xFF, VFLAG_PAYLOAD }
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};
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bool ReadVMemDir(VirtualFile* vfile, VirtualDir* vdir) { // uses a generic vdir object generated in virtual.c
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int n_templates = sizeof(vMemFileTemplates) / sizeof(VirtualFile);
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const VirtualFile* templates = vMemFileTemplates;
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while (++vdir->index < n_templates) {
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// copy current template to vfile
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memcpy(vfile, templates + vdir->index, sizeof(VirtualFile));
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// process special flags
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if (((vfile->flags & VFLAG_N3DS_ONLY) && (IS_O3DS)) || // this is not on O3DS consoles
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((vfile->flags & VFLAG_OTP) && !(IS_UNLOCKED)) || // OTP still locked
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((vfile->flags & VFLAG_BOOT9) && (sha_cmp(boot9_sha256, (u8*) BOOT9_POS, BOOT9_LEN, SHA256_MODE) != 0)) || // boot9 not found
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((vfile->flags & VFLAG_BOOT11) && (sha_cmp(boot11_sha256, (u8*) BOOT11_POS, BOOT11_LEN, SHA256_MODE) != 0)) || // boot11 not found
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((vfile->flags & VFLAG_PAYLOAD) && IS_SIGHAX)) // not available on SigHax (yet)
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continue;
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// found if arriving here
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return true;
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}
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return false;
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}
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int ReadVMemFile(const VirtualFile* vfile, u8* buffer, u64 offset, u64 count) {
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if ((vfile->flags & VFLAG_OTP) && (vfile->keyslot == 0x11)) {
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u8 __attribute__((aligned(32))) otp_local[vfile->size];
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u8 __attribute__((aligned(32))) otp_iv[0x10];
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u8* otp_mem = (u8*) (u32) vfile->offset;
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memcpy(otp_iv, OTP_IV, 0x10);
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setup_aeskey(0x11, OTP_KEY);
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use_aeskey(0x11);
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cbc_decrypt(otp_mem, otp_local, vfile->size / 0x10, AES_CNT_TITLEKEY_DECRYPT_MODE, otp_iv);
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memcpy(buffer, otp_local + offset, count);
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} else {
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u32 foffset = vfile->offset + offset;
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memcpy(buffer, (u8*) foffset, count);
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}
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return 0;
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}
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int WriteVMemFile(const VirtualFile* vfile, const u8* buffer, u64 offset, u64 count) {
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if (vfile->flags & (VFLAG_OTP|VFLAG_BOOT9|VFLAG_BOOT11)) {
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return 1; // not writable / writes blocked
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} else {
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u32 foffset = vfile->offset + offset;
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memcpy((u8*) foffset, buffer, count);
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}
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return 0;
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}
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