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Update image validation enable/disable

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Update this to match the new mokutil behaviour
This commit is contained in:
Matthew Garrett 2012-10-23 15:06:59 -04:00
parent 35e185edd9
commit eb4c59b0c8
1 changed files with 45 additions and 25 deletions
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70
MokManager.c
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@ -35,7 +35,8 @@ typedef struct {
typedef struct {
UINT32 MokSBState;
UINT8 hash[SHA256_DIGEST_SIZE];
UINT32 PWLen;
CHAR16 Password[PASSWORD_MAX];
} __attribute__ ((packed)) MokSBvar;
static EFI_INPUT_KEY get_keystroke (void)
@ -693,12 +694,13 @@ static INTN mok_sb_prompt (void *MokSB, void *data2, void *data3) {
EFI_STATUS efi_status;
UINTN MokSBSize = (UINTN)data2;
MokSBvar *var = MokSB;
CHAR16 password[SB_PASSWORD_LEN];
UINT8 fail_count = 0;
CHAR16 password[1];
UINT8 correct = 0, fail_count = 0;
UINT8 hash[SHA256_DIGEST_SIZE];
UINT32 length;
CHAR16 line[1];
UINT8 sbval = 1;
UINT8 pos;
LibDeleteVariable(L"MokSB", &shim_lock_guid);
@ -709,32 +711,23 @@ static INTN mok_sb_prompt (void *MokSB, void *data2, void *data3) {
uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
while (fail_count < 3) {
Print(L"Enter Secure Boot passphrase: ");
get_line(&length, password, SB_PASSWORD_LEN, 0);
while (correct < 3) {
RandomBytes (&pos, sizeof(pos));
if (length != SB_PASSWORD_LEN) {
Print(L"Invalid password length\n");
pos = pos % var->PWLen;
Print(L"Enter password character %d: ", pos + 1);
get_line(&length, password, 1, 0);
if (password[0] != var->Password[pos]) {
Print(L"Invalid character\n");
fail_count++;
continue;
} else {
correct++;
}
efi_status = compute_pw_hash(NULL, 0, password,
SB_PASSWORD_LEN, hash);
if (efi_status != EFI_SUCCESS) {
Print(L"Unable to generate password hash\n");
fail_count++;
continue;
}
if (CompareMem(var->hash, hash, SHA256_DIGEST_SIZE) != 0) {
Print(L"Password doesn't match\n");
fail_count++;
continue;
}
break;
if (fail_count >= 3)
break;
}
if (fail_count >= 3) {
@ -1629,12 +1622,39 @@ static EFI_STATUS check_mok_request(EFI_HANDLE image_handle)
return EFI_SUCCESS;
}
static EFI_STATUS setup_rand (void)
{
EFI_TIME time;
EFI_STATUS efi_status;
UINT64 seed;
BOOLEAN status;
efi_status = uefi_call_wrapper(RT->GetTime, 2, &time, NULL);
if (efi_status != EFI_SUCCESS)
return efi_status;
seed = ((UINT64)time.Year << 48) | ((UINT64)time.Month << 40) |
((UINT64)time.Day << 32) | ((UINT64)time.Hour << 24) |
((UINT64)time.Minute << 16) | ((UINT64)time.Second << 8) |
((UINT64)time.Daylight);
status = RandomSeed((UINT8 *)&seed, sizeof(seed));
if (!status)
return EFI_ABORTED;
return EFI_SUCCESS;
}
EFI_STATUS efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab)
{
EFI_STATUS efi_status;
InitializeLib(image_handle, systab);
setup_rand();
efi_status = check_mok_request(image_handle);
return efi_status;