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sept: tweak vector check

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This commit is contained in:
Michael Scire 2019-06-19 12:26:37 -07:00
parent 938da08e14
commit 8663eb1a6e
1 changed files with 13 additions and 0 deletions
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13
sept/sept-secondary/key_derivation/src/key_derivation.c
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@ -98,7 +98,20 @@ void derive_keys(void) {
clear_aes_keyslot(0xD); clear_aes_keyslot(0xD);
/* Test against a vector. */ /* Test against a vector. */
for (size_t i = 0; i < 4; i++) {
work_buffer[i] = 0;
}
if (memcmp(work_buffer, zeroes, 0x10) != 0) {
clear_aes_keyslot(0xE);
clear_aes_keyslot(0xD);
clear_aes_keyslot(0xC);
clear_aes_keyslot(0xA);
clear_aes_keyslot(0xF);
generic_panic();
}
se_aes_ecb_decrypt_block(0xE, work_buffer, 0x10, master_devkey_vectors[derivation_id], 0x10); se_aes_ecb_decrypt_block(0xE, work_buffer, 0x10, master_devkey_vectors[derivation_id], 0x10);
if (memcmp(work_buffer, zeroes, 0x10) == 0) { if (memcmp(work_buffer, zeroes, 0x10) == 0) {
clear_aes_keyslot(0xE); clear_aes_keyslot(0xE);
clear_aes_keyslot(0xD); clear_aes_keyslot(0xD);