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sept: indulge paranoia, some.

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This commit is contained in:
Michael Scire 2019-06-19 00:42:30 -07:00
parent b82d8aaba9
commit 06e4158b93
1 changed files with 3 additions and 0 deletions
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3
sept/sept-secondary/key_derivation/src/key_derivation.c
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@ -75,14 +75,17 @@ void derive_keys(void) {
/* Derive master key, device master key. */
decrypt_data_into_keyslot(0xC, 0xE, masterkey_seed, 0x10);
decrypt_data_into_keyslot(0xE, 0xE, masterkey_4x_seed, 0x10);
clear_aes_keyslot(0xD);
/* Derive device keys. */
decrypt_data_into_keyslot(0xA, 0xF, devicekey_4x_seed, 0x10);
decrypt_data_into_keyslot(0xF, 0xF, devicekey_seed, 0x10);
clear_aes_keyslot(0xD);
/* Derive firmware specific device key. */
se_aes_ecb_decrypt_block(0xA, work_buffer, 0x10, master_devkey_seeds[derivation_id], 0x10);
decrypt_data_into_keyslot(0xE, 0xE, work_buffer, 0x10);
clear_aes_keyslot(0xD);
/* Clear work buffer. */
for (size_t i = 0; i < 4; i++) {