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Code Issues Releases Activity

hos: Fix mkey validation on BIS derivation

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CTCaer 2020-06-15 17:31:29 +03:00
parent 6159284be6
commit 564f36fc8b
1 changed files with 5 additions and 6 deletions
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11
nyx/nyx_gui/hos/hos.c
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@ -558,7 +558,7 @@ static void _hos_validate_sept_mkey(u32 kb)
hos_eks_save(kb); hos_eks_save(kb);
return; return;
} }
} while (mkey_idx); } while (mkey_idx - 1);
se_aes_key_clear(2); se_aes_key_clear(2);
hos_eks_clear(kb); hos_eks_clear(kb);
@ -574,7 +574,6 @@ int hos_bis_keygen(u8 *keyblob, u32 kb, tsec_ctxt_t *tsec_ctxt)
if (!h_cfg.eks || !h_cfg.eks->enabled_bis) if (!h_cfg.eks || !h_cfg.eks->enabled_bis)
{ {
///////// check sept.
hos_keygen(keyblob, kb, tsec_ctxt); hos_keygen(keyblob, kb, tsec_ctxt);
if (kb >= KB_FIRMWARE_VERSION_400) if (kb >= KB_FIRMWARE_VERSION_400)
@ -599,7 +598,7 @@ int hos_bis_keygen(u8 *keyblob, u32 kb, tsec_ctxt_t *tsec_ctxt)
se_aes_key_set(2, tmp_mkey, 0x10); se_aes_key_set(2, tmp_mkey, 0x10);
se_aes_crypt_ecb(2, 0, tmp_mkey, 0x10, mkey_vectors[mkey_idx - 1 - idx], 0x10); se_aes_crypt_ecb(2, 0, tmp_mkey, 0x10, mkey_vectors[mkey_idx - 1 - idx], 0x10);
} }
} while (memcmp(tmp_mkey, "\x00\x00\x00\x00\x00\x00\x00\x00", 8) != 0 && mkey_idx); } while (memcmp(tmp_mkey, "\x00\x00\x00\x00\x00\x00\x00\x00", 8) != 0 && (mkey_idx - 1));
// Derive new device key. // Derive new device key.
se_aes_key_clear(1); se_aes_key_clear(1);
@ -635,6 +634,9 @@ int hos_bis_keygen(u8 *keyblob, u32 kb, tsec_ctxt_t *tsec_ctxt)
// Generate BIS 2/3 Keys. // Generate BIS 2/3 Keys.
se_aes_crypt_block_ecb(2, 0, bis_keys + (4 * 0x10), bis_keyseed[4]); se_aes_crypt_block_ecb(2, 0, bis_keys + (4 * 0x10), bis_keyseed[4]);
se_aes_crypt_block_ecb(2, 0, bis_keys + (5 * 0x10), bis_keyseed[5]); se_aes_crypt_block_ecb(2, 0, bis_keys + (5 * 0x10), bis_keyseed[5]);
if (kb >= KB_FIRMWARE_VERSION_700)
_hos_validate_sept_mkey(kb);
} }
else else
{ {
@ -648,9 +650,6 @@ int hos_bis_keygen(u8 *keyblob, u32 kb, tsec_ctxt_t *tsec_ctxt)
memcpy(bis_keys + (5 * 0x10), h_cfg.eks->bis_keys[2].tweak, 0x10); memcpy(bis_keys + (5 * 0x10), h_cfg.eks->bis_keys[2].tweak, 0x10);
} }
if (kb >= KB_FIRMWARE_VERSION_700)
_hos_validate_sept_mkey(kb);
// Clear all AES keyslots. // Clear all AES keyslots.
for (u32 i = 0; i < 6; i++) for (u32 i = 0; i < 6; i++)
se_aes_key_clear(i); se_aes_key_clear(i);