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fusee: always use the exo2 (modern tz) key layout

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Michael Scire 2020-06-11 22:30:20 -07:00 committed by SciresM
parent 6780b096ca
commit 47512cc8a2
1 changed files with 11 additions and 36 deletions
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43
fusee/fusee-secondary/src/key_derivation.c
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@ -161,8 +161,8 @@ int derive_nx_keydata(uint32_t target_firmware, const nx_keyblob_t *keyblobs, ui
void *tsec_root_key = (void *)((uintptr_t)tsec_root_keys + 0x10 * (rev - MASTERKEY_REVISION_620)); void *tsec_root_key = (void *)((uintptr_t)tsec_root_keys + 0x10 * (rev - MASTERKEY_REVISION_620));
if (memcmp(tsec_root_key, zeroes, 0x10) != 0) { if (memcmp(tsec_root_key, zeroes, 0x10) != 0) {
/* We got a valid key from emulation. */ /* We got a valid key from emulation. */
set_aes_keyslot(0xC, tsec_root_key, 0x10); set_aes_keyslot(0xD, tsec_root_key, 0x10);
se_aes_ecb_decrypt_block(0xC, work_buffer, 0x10, new_master_kek_seeds[rev - MASTERKEY_REVISION_620], 0x10); se_aes_ecb_decrypt_block(0xD, work_buffer, 0x10, new_master_kek_seeds[rev - MASTERKEY_REVISION_620], 0x10);
memcpy(g_dec_keyblobs[rev].master_kek, work_buffer, 0x10); memcpy(g_dec_keyblobs[rev].master_kek, work_buffer, 0x10);
} }
} }
@ -179,8 +179,8 @@ int derive_nx_keydata(uint32_t target_firmware, const nx_keyblob_t *keyblobs, ui
fclose(extkey_file); fclose(extkey_file);
for (unsigned int rev = MASTERKEY_REVISION_620; rev < MASTERKEY_REVISION_MAX; rev++) { for (unsigned int rev = MASTERKEY_REVISION_620; rev < MASTERKEY_REVISION_MAX; rev++) {
if (memcmp(extkeys.tsec_root_keys[rev - MASTERKEY_REVISION_620], zeroes, 0x10) != 0) { if (memcmp(extkeys.tsec_root_keys[rev - MASTERKEY_REVISION_620], zeroes, 0x10) != 0) {
set_aes_keyslot(0xC, extkeys.tsec_root_keys[rev - MASTERKEY_REVISION_620], 0x10); set_aes_keyslot(0xD, extkeys.tsec_root_keys[rev - MASTERKEY_REVISION_620], 0x10);
se_aes_ecb_decrypt_block(0xC, work_buffer, 0x10, new_master_kek_seeds[rev - MASTERKEY_REVISION_620], 0x10); se_aes_ecb_decrypt_block(0xD, work_buffer, 0x10, new_master_kek_seeds[rev - MASTERKEY_REVISION_620], 0x10);
memcpy(g_dec_keyblobs[rev].master_kek, work_buffer, 0x10); memcpy(g_dec_keyblobs[rev].master_kek, work_buffer, 0x10);
} else { } else {
memcpy(g_dec_keyblobs[rev].master_kek, extkeys.master_keks[rev], 0x10); memcpy(g_dec_keyblobs[rev].master_kek, extkeys.master_keks[rev], 0x10);
@ -198,7 +198,7 @@ int derive_nx_keydata(uint32_t target_firmware, const nx_keyblob_t *keyblobs, ui
clear_aes_keyslot(0xE); clear_aes_keyslot(0xE);
/* Get needed data. */ /* Get needed data. */
set_aes_keyslot(0xC, g_dec_keyblobs[available_revision].master_kek, 0x10); set_aes_keyslot(0xD, g_dec_keyblobs[available_revision].master_kek, 0x10);
/* Also set the Package1 key for the revision that is stored on the eMMC boot0 partition. */ /* Also set the Package1 key for the revision that is stored on the eMMC boot0 partition. */
if (target_firmware < ATMOSPHERE_TARGET_FIRMWARE_6_2_0) { if (target_firmware < ATMOSPHERE_TARGET_FIRMWARE_6_2_0) {
@ -206,42 +206,17 @@ int derive_nx_keydata(uint32_t target_firmware, const nx_keyblob_t *keyblobs, ui
} }
/* Derive keys for Exosphere, lock critical keyslots. */ /* Derive keys for Exosphere, lock critical keyslots. */
switch (target_firmware) {
case ATMOSPHERE_TARGET_FIRMWARE_1_0_0:
case ATMOSPHERE_TARGET_FIRMWARE_2_0_0:
case ATMOSPHERE_TARGET_FIRMWARE_3_0_0:
decrypt_data_into_keyslot(0xD, 0xF, devicekey_seed, 0x10);
decrypt_data_into_keyslot(0xC, 0xC, masterkey_seed, 0x10);
break;
case ATMOSPHERE_TARGET_FIRMWARE_4_0_0:
decrypt_data_into_keyslot(0xD, 0xF, devicekey_4x_seed, 0x10);
decrypt_data_into_keyslot(0xF, 0xF, devicekey_seed, 0x10);
decrypt_data_into_keyslot(0xE, 0xC, masterkey_4x_seed, 0x10);
decrypt_data_into_keyslot(0xC, 0xC, masterkey_seed, 0x10);
break;
case ATMOSPHERE_TARGET_FIRMWARE_5_0_0:
case ATMOSPHERE_TARGET_FIRMWARE_6_0_0:
case ATMOSPHERE_TARGET_FIRMWARE_6_2_0:
case ATMOSPHERE_TARGET_FIRMWARE_7_0_0:
case ATMOSPHERE_TARGET_FIRMWARE_8_0_0:
case ATMOSPHERE_TARGET_FIRMWARE_8_1_0:
case ATMOSPHERE_TARGET_FIRMWARE_9_0_0:
decrypt_data_into_keyslot(0xA, 0xF, devicekey_4x_seed, 0x10); decrypt_data_into_keyslot(0xA, 0xF, devicekey_4x_seed, 0x10);
decrypt_data_into_keyslot(0xF, 0xF, devicekey_seed, 0x10); decrypt_data_into_keyslot(0xF, 0xF, devicekey_seed, 0x10);
decrypt_data_into_keyslot(0xD, 0xC, masterkey_seed, 0x10); decrypt_data_into_keyslot(0xC, 0xD, masterkey_4x_seed, 0x10);
decrypt_data_into_keyslot(0xC, 0xC, masterkey_4x_seed, 0x10); decrypt_data_into_keyslot(0xD, 0xD, masterkey_seed, 0x10);
break;
default:
return -1;
}
/* Setup master key revision, derive older master keys for use. */ /* Setup master key revision, derive older master keys for use. */
return mkey_detect_revision(fuse_get_retail_type() != 0); return mkey_detect_revision(fuse_get_retail_type() != 0);
} }
static void generate_specific_aes_key(void *dst, const void *wrapped_key, bool should_mask, uint32_t target_firmware, uint32_t generation) { static void generate_specific_aes_key(void *dst, const void *wrapped_key, bool should_mask, uint32_t target_firmware, uint32_t generation) {
unsigned int keyslot = (target_firmware >= ATMOSPHERE_TARGET_FIRMWARE_4_0_0) ? (devkey_get_keyslot(generation)) : (KEYSLOT_SWITCH_DEVICEKEY); unsigned int keyslot = devkey_get_keyslot(generation);
if (fuse_get_bootrom_patch_version() < 0x7F) { if (fuse_get_bootrom_patch_version() < 0x7F) {
/* On dev units, use a fixed "all-zeroes" seed. */ /* On dev units, use a fixed "all-zeroes" seed. */
@ -273,7 +248,7 @@ static void generate_personalized_aes_key_for_bis(void *dst, const void *wrapped
0x89, 0x61, 0x5E, 0xE0, 0x5C, 0x31, 0xB6, 0x80, 0x5F, 0xE5, 0x8F, 0x3D, 0xA2, 0x4F, 0x7A, 0xA8 0x89, 0x61, 0x5E, 0xE0, 0x5C, 0x31, 0xB6, 0x80, 0x5F, 0xE5, 0x8F, 0x3D, 0xA2, 0x4F, 0x7A, 0xA8
}; };
unsigned int keyslot = (target_firmware >= ATMOSPHERE_TARGET_FIRMWARE_4_0_0) ? (devkey_get_keyslot(generation)) : (KEYSLOT_SWITCH_DEVICEKEY); unsigned int keyslot = devkey_get_keyslot(generation);
/* Derive kek. */ /* Derive kek. */
decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, keyslot, kek_source, 0x10); decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, keyslot, kek_source, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, KEYSLOT_SWITCH_TEMPKEY, wrapped_kek, 0x10); decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, KEYSLOT_SWITCH_TEMPKEY, wrapped_kek, 0x10);