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keys: Split crypto functions by sysmodule

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shchmue 2022-11-05 14:39:02 -07:00
parent c7d90ec8ca
commit dd41e3fee8
14 changed files with 621 additions and 326 deletions
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54
source/keys/nfc_crypto.c Normal file
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/*
* Copyright (c) 2022 shchmue
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "nfc_crypto.h"
#include <mem/minerva.h>
#include <sec/se.h>
#include <string.h>
void nfc_decrypt_amiibo_keys(key_storage_t *keys, nfc_save_key_t out_nfc_save_keys[2], bool is_dev) {
const u8 *encrypted_keys = is_dev ? encrypted_nfc_keys_dev : encrypted_nfc_keys;
u32 kek[SE_KEY_128_SIZE / 4] = {0};
decrypt_aes_key(KS_AES_ECB, keys, kek, nfc_key_source, 0, 0);
nfc_keyblob_t __attribute__((aligned(4))) nfc_keyblob;
static const u8 nfc_iv[SE_KEY_128_SIZE] = {
0xB9, 0x1D, 0xC1, 0xCF, 0x33, 0x5F, 0xA6, 0x13, 0x2A, 0xEF, 0x90, 0x99, 0xAA, 0xCA, 0x93, 0xC8};
se_aes_key_set(KS_AES_CTR, kek, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, &nfc_keyblob, sizeof(nfc_keyblob), encrypted_keys, sizeof(nfc_keyblob), &nfc_iv);
minerva_periodic_training();
u32 xor_pad[0x20 / 4] = {0};
se_aes_key_set(KS_AES_CTR, nfc_keyblob.ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, xor_pad, sizeof(xor_pad), xor_pad, sizeof(xor_pad), nfc_keyblob.ctr_iv);
minerva_periodic_training();
memcpy(out_nfc_save_keys[0].hmac_key, nfc_keyblob.hmac_key, sizeof(nfc_keyblob.hmac_key));
memcpy(out_nfc_save_keys[0].phrase, nfc_keyblob.phrase, sizeof(nfc_keyblob.phrase));
out_nfc_save_keys[0].seed_size = sizeof(nfc_keyblob.seed);
memcpy(out_nfc_save_keys[0].seed, nfc_keyblob.seed, sizeof(nfc_keyblob.seed));
memcpy(out_nfc_save_keys[0].xor_pad, xor_pad, sizeof(xor_pad));
memcpy(out_nfc_save_keys[1].hmac_key, nfc_keyblob.hmac_key_for_verif, sizeof(nfc_keyblob.hmac_key_for_verif));
memcpy(out_nfc_save_keys[1].phrase, nfc_keyblob.phrase_for_verif, sizeof(nfc_keyblob.phrase_for_verif));
out_nfc_save_keys[1].seed_size = sizeof(nfc_keyblob.seed_for_verif);
memcpy(out_nfc_save_keys[1].seed, nfc_keyblob.seed_for_verif, sizeof(nfc_keyblob.seed_for_verif));
memcpy(out_nfc_save_keys[1].xor_pad, xor_pad, sizeof(xor_pad));
}