diff options
Diffstat (limited to 'mok.c')
| -rw-r--r-- | mok.c | 46 |
1 files changed, 46 insertions, 0 deletions
@@ -34,6 +34,44 @@ static BOOLEAN check_var(CHAR16 *varname) efi_status_; \ }) +static UINTN +format_hsi_status(UINT8 *buf, size_t sz, + struct mok_state_variable *msv UNUSED) +{ + const char heapx[] = "heap-is-executable: "; + const char stackx[] = "\nstack-is-executable: "; + const char row[] = "\nro-sections-are-writable: "; + const char hasmap[] = "\nhas-memory-attribute-protocol: "; + const char finale[] = "\n"; + char *pos; + + /* + * sizeof includes the trailing NUL which is where our 0 or 1 value + * fits + */ + UINTN ret = sizeof(heapx) + sizeof(stackx) + + sizeof(row) + sizeof(hasmap) + + sizeof(finale); + + if (buf == 0 || sz < ret) { + return ret; + } + + buf[0] = 0; + pos = (char *)buf; + pos = stpcpy(pos, heapx); + pos = stpcpy(pos, (hsi_status & SHIM_HSI_STATUS_HEAPX) ? "1" : "0"); + pos = stpcpy(pos, stackx); + pos = stpcpy(pos, (hsi_status & SHIM_HSI_STATUS_STACKX) ? "1" : "0"); + pos = stpcpy(pos, row); + pos = stpcpy(pos, (hsi_status & SHIM_HSI_STATUS_ROW) ? "1" : "0"); + pos = stpcpy(pos, hasmap); + pos = stpcpy(pos, (hsi_status & SHIM_HSI_STATUS_HASMAP) ? "1" : "0"); + stpcpy(pos, finale); + + return ret; +} + /* * If the OS has set any of these variables we need to drop into MOK and * handle them appropriately @@ -223,6 +261,14 @@ struct mok_state_variable mok_state_variable_data[] = { .pcr = 14, .state = &mok_policy, }, + {.name = L"HSIStatus", + .name8 = "HSIStatus", + .rtname = L"HSIStatus", + .rtname8 = "HSIStatus", + .guid = &SHIM_LOCK_GUID, + .flags = MOK_VARIABLE_CONFIG_ONLY, + .format = format_hsi_status, + }, { NULL, } }; size_t n_mok_state_variables = sizeof(mok_state_variable_data) / sizeof(mok_state_variable_data[0]); |