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Fusee: Implement BIS crypto functions.

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This commit is contained in:
Michael Scire
2018-05-17 07:15:29 -06:00
parent 5631b27449
commit bb1dcb2655
3 changed files with 45 additions and 16 deletions
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48
fusee/fusee-secondary/src/switch_fs.c
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@@ -91,23 +91,43 @@ static int mmc_partition_write(device_partition_t *devpart, const void *src, uin
}
static int switchfs_bis_crypto_decrypt(device_partition_t *devpart, uint64_t sector, uint64_t num_sectors) {
unsigned int keyslot = (unsigned int)devpart->crypto_flags;
(void)keyslot;
(void)sector;
(void)num_sectors;
/*devpart->crypto_work_buffer*/
/* TODO */
return 0;
unsigned int keyslot_a = 4; /* These keyslots are never used by exosphere, and should be safe. */
unsigned int keyslot_b = 5;
size_t size = num_sectors * devpart->sector_size;
switch (devpart->crypto_mode) {
case DevicePartitionCryptoMode_Ctr:
set_aes_keyslot(keyslot_a, devpart->keys[0], 0x10);
se_aes_ctr_crypt(keyslot_a, devpart->crypto_work_buffer, size, devpart->crypto_work_buffer, size, devpart->iv, 0x10);
return 0;
case DevicePartitionCryptoMode_Xts:
set_aes_keyslot(keyslot_a, devpart->keys[0], 0x10);
set_aes_keyslot(keyslot_b, devpart->keys[1], 0x10);
se_aes_128_xts_nintendo_decrypt(keyslot_a, keyslot_b, sector, devpart->crypto_work_buffer, devpart->crypto_work_buffer, num_sectors * devpart->sector_size, devpart->sector_size);
return 0;
case DevicePartitionCryptoMode_None:
default:
return 0;
}
}
static int switchfs_bis_crypto_encrypt(device_partition_t *devpart, uint64_t sector, uint64_t num_sectors) {
unsigned int keyslot = (unsigned int)devpart->crypto_flags;
(void)keyslot;
(void)sector;
(void)num_sectors;
/*devpart->crypto_work_buffer*/
/* TODO */
return 0;
unsigned int keyslot_a = 4; /* These keyslots are never used by exosphere, and should be safe. */
unsigned int keyslot_b = 5;
size_t size = num_sectors * devpart->sector_size;
switch (devpart->crypto_mode) {
case DevicePartitionCryptoMode_Ctr:
set_aes_keyslot(keyslot_a, devpart->keys[0], 0x10);
se_aes_ctr_crypt(keyslot_a, devpart->crypto_work_buffer, size, devpart->crypto_work_buffer, size, devpart->iv, 0x10);
return 0;
case DevicePartitionCryptoMode_Xts:
set_aes_keyslot(keyslot_a, devpart->keys[0], 0x10);
set_aes_keyslot(keyslot_b, devpart->keys[1], 0x10);
se_aes_128_xts_nintendo_encrypt(keyslot_a, keyslot_b, sector, devpart->crypto_work_buffer, devpart->crypto_work_buffer, num_sectors * devpart->sector_size, devpart->sector_size);
return 0;
case DevicePartitionCryptoMode_None:
default:
return 0;
}
}
static mmc_partition_info_t g_sd_mmcpart = { &g_sd_mmc, SWITCH_MICROSD, SDMMC_PARTITION_USER };