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melonDS
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remove requirement for aeskeys.bin and boot2_7/9.bin

This commit is contained in:
Arisotura 2020-06-01 23:13:38 +02:00
parent 43e045357f
commit ee9fe327e2
2 changed files with 68 additions and 55 deletions
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87
src/DSi.cpp
View File

@ -31,6 +31,8 @@
#include "DSi_SD.h"
#include "DSi_AES.h"
#include "tiny-AES-c/aes.hpp"
namespace NDS
{
@ -341,52 +343,65 @@ bool LoadNAND()
MBK[0][8] = mbk[11];
MBK[1][8] = mbk[11];
// load binaries
// TODO: optionally support loading from actual NAND?
// currently decrypted binaries have to be provided
// they can be decrypted with twltool
// load boot2 binaries
FILE* bin;
AES_ctx ctx;
const u8 boot2key[16] = {0xAD, 0x34, 0xEC, 0xF9, 0x62, 0x6E, 0xC2, 0x3A, 0xF6, 0xB4, 0x6C, 0x00, 0x80, 0x80, 0xEE, 0x98};
u8 boot2iv[16];
u8 tmp[16];
u32 dstaddr;
bin = Platform::OpenLocalFile("boot2_9.bin", "rb");
if (bin)
*(u32*)&tmp[0] = bootparams[3];
*(u32*)&tmp[4] = -bootparams[3];
*(u32*)&tmp[8] = ~bootparams[3];
*(u32*)&tmp[12] = 0;
for (int i = 0; i < 16; i++) boot2iv[i] = tmp[15-i];
AES_init_ctx_iv(&ctx, boot2key, boot2iv);
fseek(f, bootparams[0], SEEK_SET);
dstaddr = bootparams[2];
for (u32 i = 0; i < bootparams[3]; i += 16)
{
u32 dstaddr = bootparams[2];
for (u32 i = 0; i < bootparams[1]; i += 4)
{
u32 _tmp;
fread(&_tmp, 4, 1, bin);
ARM9Write32(dstaddr, _tmp);
dstaddr += 4;
}
u8 data[16];
fread(data, 16, 1, f);
fclose(bin);
}
else
{
printf("ARM9 boot2 not found\n");
for (int j = 0; j < 16; j++) tmp[j] = data[15-j];
AES_CTR_xcrypt_buffer(&ctx, tmp, 16);
for (int j = 0; j < 16; j++) data[j] = tmp[15-j];
ARM9Write32(dstaddr, *(u32*)&data[0]); dstaddr += 4;
ARM9Write32(dstaddr, *(u32*)&data[4]); dstaddr += 4;
ARM9Write32(dstaddr, *(u32*)&data[8]); dstaddr += 4;
ARM9Write32(dstaddr, *(u32*)&data[12]); dstaddr += 4;
}
bin = Platform::OpenLocalFile("boot2_7.bin", "rb");
if (bin)
{
u32 dstaddr = bootparams[6];
for (u32 i = 0; i < bootparams[5]; i += 4)
{
u32 _tmp;
fread(&_tmp, 4, 1, bin);
ARM7Write32(dstaddr, _tmp);
dstaddr += 4;
}
*(u32*)&tmp[0] = bootparams[7];
*(u32*)&tmp[4] = -bootparams[7];
*(u32*)&tmp[8] = ~bootparams[7];
*(u32*)&tmp[12] = 0;
for (int i = 0; i < 16; i++) boot2iv[i] = tmp[15-i];
fclose(bin);
}
else
AES_init_ctx_iv(&ctx, boot2key, boot2iv);
fseek(f, bootparams[4], SEEK_SET);
dstaddr = bootparams[6];
for (u32 i = 0; i < bootparams[7]; i += 16)
{
printf("ARM7 boot2 not found\n");
u8 data[16];
fread(data, 16, 1, f);
for (int j = 0; j < 16; j++) tmp[j] = data[15-j];
AES_CTR_xcrypt_buffer(&ctx, tmp, 16);
for (int j = 0; j < 16; j++) data[j] = tmp[15-j];
ARM7Write32(dstaddr, *(u32*)&data[0]); dstaddr += 4;
ARM7Write32(dstaddr, *(u32*)&data[4]); dstaddr += 4;
ARM7Write32(dstaddr, *(u32*)&data[8]); dstaddr += 4;
ARM7Write32(dstaddr, *(u32*)&data[12]); dstaddr += 4;
}
// repoint CPUs to the boot2 binaries
// repoint the CPUs to the boot2 binaries
BootAddr[0] = bootparams[2];
BootAddr[1] = bootparams[6];

36
src/DSi_AES.cpp
View File

@ -131,26 +131,24 @@ void Reset()
// initialize keys
FILE* f = Platform::OpenLocalFile("aeskeys.bin", "rb");
if (f)
{
fread(KeyNormal[0], 16, 1, f);
fread(KeyX[0], 16, 1, f);
fread(KeyY[0], 16, 1, f);
fread(KeyNormal[1], 16, 1, f);
fread(KeyX[1], 16, 1, f);
fread(KeyY[1], 16, 1, f);
fread(KeyNormal[2], 16, 1, f);
fread(KeyX[2], 16, 1, f);
fread(KeyY[2], 16, 1, f);
fread(KeyNormal[3], 16, 1, f);
fread(KeyX[3], 16, 1, f);
fread(KeyY[3], 16, 1, f);
// slot 0: modcrypt
*(u32*)&KeyX[0][0] = 0x746E694E;
*(u32*)&KeyX[0][4] = 0x6F646E65;
fclose(f);
}
else
printf("AES: aeskeys.bin not found\n");
// slot 1: 'Tad'/dev.kp
*(u32*)&KeyX[1][0] = 0x4E00004A;
*(u32*)&KeyX[1][4] = 0x4A00004E;
*(u32*)&KeyX[1][8] = (u32)(DSi::ConsoleID >> 32) ^ 0xC80C4B72;
*(u32*)&KeyX[1][12] = (u32)DSi::ConsoleID;
// slot 3: console-unique eMMC crypto
*(u32*)&KeyX[3][0] = (u32)DSi::ConsoleID;
*(u32*)&KeyX[3][4] = (u32)DSi::ConsoleID ^ 0x24EE6906;
*(u32*)&KeyX[3][8] = (u32)(DSi::ConsoleID >> 32) ^ 0xE65B601D;
*(u32*)&KeyX[3][12] = (u32)(DSi::ConsoleID >> 32);
*(u32*)&KeyY[3][0] = 0x0AB9DC76;
*(u32*)&KeyY[3][4] = 0xBD4DC4D3;
*(u32*)&KeyY[3][8] = 0x202DDD1D;
}