LowLevel/Luma3DS-3GX
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Some clean-up

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Aurora 2016-03-05 00:41:42 +01:00
parent cb06cf83ff
commit 899ad1887a
1 changed files with 15 additions and 14 deletions
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29
source/crypto.c
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@ -390,36 +390,37 @@ void decArm9Bin(void *armHdr, u8 mode){
u32 slot = mode ? 0x16 : 0x15;
//Setup keys needed for arm9bin decryption
memcpy((u8*)keyY, (void *)(armHdr+0x10), 0x10);
memcpy((u8*)CTR, (void *)(armHdr+0x20), 0x10);
u32 size = atoi((void *)(armHdr+0x30));
memcpy(keyY, armHdr+0x10, 0x10);
memcpy(CTR, armHdr+0x20, 0x10);
u32 size = atoi(armHdr+0x30);
if(mode){
//Set 0x11 to key2 for the arm9bin and misc keys
aes_setkey(0x11, (u8*)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((u8*)keyX, (void *)(armHdr+0x60), 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, (u8*)keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
aes(keyX, armHdr+0x60, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
}
aes_setkey(slot, (u8*)keyY, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_setiv((u8*)CTR, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_setkey(slot, keyY, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_setiv(CTR, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_use_keyslot(slot);
//Decrypt arm9bin
aes((void *)(armHdr+0x800), (void *)(armHdr+0x800), size/AES_BLOCK_SIZE, CTR, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
aes(armHdr+0x800, armHdr+0x800, size/AES_BLOCK_SIZE, CTR, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
}
//Sets the N3DS 9.6 KeyXs
void setKeyXs(void *armHdr){
//Set keys 0x19..0x1F keyXs
u8* decKey = (void *)(armHdr+0x89824);
aes_setkey(0x11, (u8*)key2, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
void *keyData = armHdr+0x89814;
void *decKey = keyData+0x10;
aes_setkey(0x11, key2, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_use_keyslot(0x11);
for(u32 slot = 0x19; slot < 0x20; slot++){
aes(decKey, (void *)(armHdr+0x89814), 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, (u8*)decKey, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
*(u8*)(armHdr+0x89814+0xF) += 1;
aes(decKey, keyData, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
aes_setkey(slot, decKey, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
*(u8*)(keyData+0xF) += 1;
}
}