LowLevel/Luma3DS-3GX
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Aurora 2016-03-21 19:20:26 +01:00
parent 1f5b824c27
commit c542bc5cf3
3 changed files with 11 additions and 12 deletions
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16
source/crypto.c
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@ -252,7 +252,7 @@ void nandFirm0(u8 *outbuf, u32 size, u32 console){
} }
//Decrypts the N3DS arm9bin //Decrypts the N3DS arm9bin
void decArm9Bin(u8 *armHdr, u32 mode){ void decryptArm9Bin(u8 *arm9Section, u32 mode){
//Firm keys //Firm keys
u8 keyY[0x10]; u8 keyY[0x10];
@ -260,11 +260,11 @@ void decArm9Bin(u8 *armHdr, u32 mode){
u8 slot = mode ? 0x16 : 0x15; u8 slot = mode ? 0x16 : 0x15;
//Setup keys needed for arm9bin decryption //Setup keys needed for arm9bin decryption
memcpy(keyY, armHdr+0x10, 0x10); memcpy(keyY, arm9Section+0x10, 0x10);
memcpy(CTR, armHdr+0x20, 0x10); memcpy(CTR, arm9Section+0x20, 0x10);
u32 size = 0; u32 size = 0;
//http://stackoverflow.com/questions/12791077/atoi-implementation-in-c //http://stackoverflow.com/questions/12791077/atoi-implementation-in-c
for(u8 *tmp = armHdr+0x30; *tmp; tmp++) for(u8 *tmp = arm9Section+0x30; *tmp; tmp++)
size = (size<<3)+(size<<1)+(*tmp)-'0'; size = (size<<3)+(size<<1)+(*tmp)-'0';
if(mode){ if(mode){
@ -273,7 +273,7 @@ void decArm9Bin(u8 *armHdr, u32 mode){
//Set 0x11 to key2 for the arm9bin and misc keys //Set 0x11 to key2 for the arm9bin and misc keys
aes_setkey(0x11, key2, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL); aes_setkey(0x11, key2, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_use_keyslot(0x11); aes_use_keyslot(0x11);
aes(keyX, armHdr+0x60, 1, NULL, AES_ECB_DECRYPT_MODE, 0); aes(keyX, arm9Section+0x60, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL); aes_setkey(slot, keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
} }
@ -282,13 +282,13 @@ void decArm9Bin(u8 *armHdr, u32 mode){
aes_use_keyslot(slot); aes_use_keyslot(slot);
//Decrypt arm9bin //Decrypt arm9bin
aes(armHdr+0x800, armHdr+0x800, size/AES_BLOCK_SIZE, CTR, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL); aes(arm9Section+0x800, arm9Section+0x800, size/AES_BLOCK_SIZE, CTR, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
} }
//Sets the N3DS 9.6 KeyXs //Sets the N3DS 9.6 KeyXs
void setKeyXs(u8 *armHdr){ void setKeyXs(u8 *arm9Section){
u8 *keyData = armHdr+0x89814; u8 *keyData = arm9Section+0x89814;
u8 *decKey = keyData+0x10; u8 *decKey = keyData+0x10;
//Set keys 0x19..0x1F keyXs //Set keys 0x19..0x1F keyXs

4
source/crypto.h
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@ -49,5 +49,5 @@
//NAND/FIRM stuff //NAND/FIRM stuff
void nandFirm0(u8 *outbuf, u32 size, u32 console); void nandFirm0(u8 *outbuf, u32 size, u32 console);
void decArm9Bin(u8 *armHdr, u32 mode); void decryptArm9Bin(u8 *arm9Section, u32 mode);
void setKeyXs(u8 *armHdr); void setKeyXs(u8 *arm9Section);

3
source/firm.c
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@ -131,8 +131,7 @@ u32 loadFirm(void){
arm9Section = (u8 *)firmLocation + section[2].offset; arm9Section = (u8 *)firmLocation + section[2].offset;
if(console && !usePatchedFirm) if(console && !usePatchedFirm) decryptArm9Bin(arm9Section, mode);
decArm9Bin(arm9Section, mode);
return 1; return 1;
} }