LowLevel/Luma3DS-3GX
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"Fix" the kernel9loader function and always set >= 9.6 keys, separately

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This commit is contained in:
TuxSH 2017-02-08 12:34:07 +01:00
parent 88db59405f
commit 014a0d86f1
3 changed files with 46 additions and 44 deletions
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82
source/crypto.c
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@ -393,7 +393,7 @@ void set6x7xKeys(void)
aes_setkey(0x25, keyX0x25s[ISDEVUNIT ? 1 : 0], AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_setkey(0x2F, keyY0x2Fs[ISDEVUNIT ? 1 : 0], AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
/* [3dbrew] The first 0x10-bytes are checked by the v6.0/v7.0 NATIVE_FIRM keyinit function,
/* [3dbrew] The first 0x10-bytes are checked by the v6.0/v7.0 NATIVE_FIRM keyinit function,
when non-zero it clears this block and continues to do the key generation.
Otherwise when this block was already all-zero, it immediately returns. */
memset32((void *)0x01FFCD00, 0, 0x10);
@ -442,6 +442,28 @@ bool decryptNusFirm(const Ticket *ticket, Cxi *cxi, u32 ncchSize)
return decryptExeFs(cxi);
}
void setN3DS96Keys(void)
{
//Set 0x11 keyslot
__attribute__((aligned(4))) const u8 key2s[2][AES_BLOCK_SIZE] = {
{0x42, 0x3F, 0x81, 0x7A, 0x23, 0x52, 0x58, 0x31, 0x6E, 0x75, 0x8E, 0x3A, 0x39, 0x43, 0x2E, 0xD0},
{0xFF, 0x77, 0xA0, 0x9A, 0x99, 0x81, 0xE9, 0x48, 0xEC, 0x51, 0xC9, 0x32, 0x5D, 0x14, 0xEC, 0x25}
};
aes_setkey(0x11, key2s[ISDEVUNIT ? 1 : 0], AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
__attribute__((aligned(4))) u8 keyData[AES_BLOCK_SIZE] = {0xDD, 0xDA, 0xA4, 0xC6, 0x2C, 0xC4, 0x50, 0xE9, 0xDA, 0xB6, 0x9B, 0x0D, 0x9D, 0x2A, 0x21, 0x98},
decKey[sizeof(keyData)];
//Set keys 0x19..0x1F keyXs
aes_use_keyslot(0x11);
for(u8 slot = 0x19; slot < 0x20; slot++, keyData[0xF]++)
{
aes(decKey, keyData, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, decKey, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
}
}
void kernel9Loader(Arm9Bin *arm9Section)
{
//Determine the kernel9loader version
@ -462,36 +484,27 @@ void kernel9Loader(Arm9Bin *arm9Section)
u32 *startOfArm9Bin = (u32 *)((u8 *)arm9Section + 0x800);
bool needToDecrypt = *startOfArm9Bin != 0x47704770 && *startOfArm9Bin != 0xB0862000;
if(k9lVersion == 2 || (k9lVersion == 1 && needToDecrypt))
{
//Set 0x11 keyslot
__attribute__((aligned(4))) const u8 key1s[2][AES_BLOCK_SIZE] = {
{0x07, 0x29, 0x44, 0x38, 0xF8, 0xC9, 0x75, 0x93, 0xAA, 0x0E, 0x4A, 0xB4, 0xAE, 0x84, 0xC1, 0xD8},
{0xA2, 0xF4, 0x00, 0x3C, 0x7A, 0x95, 0x10, 0x25, 0xDF, 0x4E, 0x9E, 0x74, 0xE3, 0x0C, 0x92, 0x99}
},
key2s[2][AES_BLOCK_SIZE] = {
{0x42, 0x3F, 0x81, 0x7A, 0x23, 0x52, 0x58, 0x31, 0x6E, 0x75, 0x8E, 0x3A, 0x39, 0x43, 0x2E, 0xD0},
{0xFF, 0x77, 0xA0, 0x9A, 0x99, 0x81, 0xE9, 0x48, 0xEC, 0x51, 0xC9, 0x32, 0x5D, 0x14, 0xEC, 0x25}
};
//Set 0x11 keyslot
__attribute__((aligned(4))) const u8 key1s[2][AES_BLOCK_SIZE] = {
{0x07, 0x29, 0x44, 0x38, 0xF8, 0xC9, 0x75, 0x93, 0xAA, 0x0E, 0x4A, 0xB4, 0xAE, 0x84, 0xC1, 0xD8},
{0xA2, 0xF4, 0x00, 0x3C, 0x7A, 0x95, 0x10, 0x25, 0xDF, 0x4E, 0x9E, 0x74, 0xE3, 0x0C, 0x92, 0x99}
},
key2s[2][AES_BLOCK_SIZE] = {
{0x42, 0x3F, 0x81, 0x7A, 0x23, 0x52, 0x58, 0x31, 0x6E, 0x75, 0x8E, 0x3A, 0x39, 0x43, 0x2E, 0xD0},
{0xFF, 0x77, 0xA0, 0x9A, 0x99, 0x81, 0xE9, 0x48, 0xEC, 0x51, 0xC9, 0x32, 0x5D, 0x14, 0xEC, 0x25}
};
aes_setkey(0x11, k9lVersion == 2 ? key2s[ISDEVUNIT ? 1 : 0] : key1s[ISDEVUNIT ? 1 : 0], AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
}
aes_setkey(0x11, k9lVersion == 2 ? key2s[ISDEVUNIT ? 1 : 0] : key1s[ISDEVUNIT ? 1 : 0], AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
if(needToDecrypt)
{
u8 arm9BinSlot;
u8 arm9BinSlot = k9lVersion == 0 ? 0x15 : 0x16;
if(!k9lVersion) arm9BinSlot = 0x15;
else
{
arm9BinSlot = 0x16;
//Set keyX
__attribute__((aligned(4))) u8 keyX[AES_BLOCK_SIZE];
aes_use_keyslot(0x11);
aes(keyX, arm9Section->slot0x16keyX, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(0x16, keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
}
//Set keyX
__attribute__((aligned(4))) u8 keyX[AES_BLOCK_SIZE];
aes_use_keyslot(0x11);
aes(keyX, k9lVersion == 0 ? arm9Section->keyX : arm9Section->slot0x16keyX, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(arm9BinSlot, keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
//Set keyY
__attribute__((aligned(4))) u8 keyY[AES_BLOCK_SIZE];
@ -508,21 +521,6 @@ void kernel9Loader(Arm9Bin *arm9Section)
if(*startOfArm9Bin != 0x47704770 && *startOfArm9Bin != 0xB0862000) error("Failed to decrypt the ARM9 binary.");
}
//Set >=9.6 KeyXs
if(k9lVersion == 2)
{
__attribute__((aligned(4))) u8 keyData[AES_BLOCK_SIZE] = {0xDD, 0xDA, 0xA4, 0xC6, 0x2C, 0xC4, 0x50, 0xE9, 0xDA, 0xB6, 0x9B, 0x0D, 0x9D, 0x2A, 0x21, 0x98},
decKey[sizeof(keyData)];
//Set keys 0x19..0x1F keyXs
aes_use_keyslot(0x11);
for(u8 slot = 0x19; slot < 0x20; slot++, keyData[0xF]++)
{
aes(decKey, keyData, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, decKey, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
}
}
}
void computePinHash(u8 *outbuf, const u8 *inbuf)
@ -552,4 +550,4 @@ void backupAndRestoreShaHash(bool isRestore)
memcpy(shaHashBackup, (void *)REG_SHA_HASH, sizeof(shaHashBackup));
didShaHashBackup = true;
}
}
}

3
source/crypto.h
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@ -111,6 +111,7 @@ int ctrNandWrite(u32 sector, u32 sectorCount, const u8 *inbuf);
void set6x7xKeys(void);
bool decryptExeFs(Cxi *cxi);
bool decryptNusFirm(const Ticket *ticket, Cxi *cxi, u32 ncchSize);
void setN3DS96Keys(void);
void kernel9Loader(Arm9Bin *arm9Section);
void computePinHash(u8 *outbuf, const u8 *inbuf);
void backupAndRestoreShaHash(bool isRestore);
void backupAndRestoreShaHash(bool isRestore);

5
source/main.c
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@ -30,6 +30,7 @@
#include "strings.h"
#include "buttons.h"
#include "pin.h"
#include "crypto.h"
extern CfgData configData;
extern FirmwareSource firmSource;
@ -97,6 +98,8 @@ void main(void)
//Save old options and begin saving the new boot configuration
configTemp = (configData.config & 0xFFFFFF00) | ((u32)ISA9LH << 6);
setN3DS96Keys();
//If it's a MCU reboot, try to force boot options
if(ISA9LH && CFG_BOOTENV && needConfig != CREATE_CONFIGURATION)
{
@ -271,4 +274,4 @@ boot:
}
launchFirm(firmType, loadFromStorage);
}
}