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-rw-r--r--lib/variables.c260
1 files changed, 127 insertions, 133 deletions
diff --git a/lib/variables.c b/lib/variables.c
index 59d7d054..9c2e7d0a 100644
--- a/lib/variables.c
+++ b/lib/variables.c
@@ -11,23 +11,18 @@
* Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
- * which accompanies this distribution. The full text of the license may be found
+ * which accompanies this distribution. The full text of the license may be found
* at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
- *
+ *
*/
#include <efi.h>
#include <efilib.h>
-#include <efiauthenticated.h>
-
-#include <variables.h>
-#include <guid.h>
-#include <console.h>
-#include <errors.h>
+#include "shim.h"
EFI_STATUS
variable_create_esl(void *cert, int cert_len, EFI_GUID *type, EFI_GUID *owner,
@@ -56,76 +51,75 @@ variable_create_esl(void *cert, int cert_len, EFI_GUID *type, EFI_GUID *owner,
return EFI_SUCCESS;
}
-
EFI_STATUS
-CreateTimeBasedPayload (
- IN OUT UINTN *DataSize,
- IN OUT UINT8 **Data
- )
+CreateTimeBasedPayload(IN OUT UINTN * DataSize, IN OUT UINT8 ** Data)
{
- EFI_STATUS Status;
- UINT8 *NewData;
- UINT8 *Payload;
- UINTN PayloadSize;
- EFI_VARIABLE_AUTHENTICATION_2 *DescriptorData;
- UINTN DescriptorSize;
- EFI_TIME Time;
- EFI_GUID efi_cert_type = EFI_CERT_TYPE_PKCS7_GUID;
-
- if (Data == NULL || DataSize == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // In Setup mode or Custom mode, the variable does not need to be signed but the
- // parameters to the SetVariable() call still need to be prepared as authenticated
- // variable. So we create EFI_VARIABLE_AUTHENTICATED_2 descriptor without certificate
- // data in it.
- //
- Payload = *Data;
- PayloadSize = *DataSize;
-
- DescriptorSize = OFFSET_OF(EFI_VARIABLE_AUTHENTICATION_2, AuthInfo) + OFFSET_OF(WIN_CERTIFICATE_UEFI_GUID, CertData);
- NewData = (UINT8*) AllocateZeroPool (DescriptorSize + PayloadSize);
- if (NewData == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- if ((Payload != NULL) && (PayloadSize != 0)) {
- CopyMem (NewData + DescriptorSize, Payload, PayloadSize);
- }
-
- DescriptorData = (EFI_VARIABLE_AUTHENTICATION_2 *) (NewData);
-
- ZeroMem (&Time, sizeof (EFI_TIME));
- Status = uefi_call_wrapper(RT->GetTime,2, &Time, NULL);
- if (EFI_ERROR (Status)) {
- FreePool(NewData);
- return Status;
- }
- Time.Pad1 = 0;
- Time.Nanosecond = 0;
- Time.TimeZone = 0;
- Time.Daylight = 0;
- Time.Pad2 = 0;
- CopyMem (&DescriptorData->TimeStamp, &Time, sizeof (EFI_TIME));
-
- DescriptorData->AuthInfo.Hdr.dwLength = OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData);
- DescriptorData->AuthInfo.Hdr.wRevision = 0x0200;
- DescriptorData->AuthInfo.Hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID;
- DescriptorData->AuthInfo.CertType = efi_cert_type;
-
- /* we're expecting an EFI signature list, so don't free the input since
- * it might not be in a pool */
+ EFI_STATUS efi_status;
+ UINT8 *NewData;
+ UINT8 *Payload;
+ UINTN PayloadSize;
+ EFI_VARIABLE_AUTHENTICATION_2 *DescriptorData;
+ UINTN DescriptorSize;
+ EFI_TIME Time;
+
+ if (Data == NULL || DataSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ /*
+ * In Setup mode or Custom mode, the variable does not need to be
+ * signed but the
+ * parameters to the SetVariable() call still need to be prepared as
+ * authenticated variable. So we create EFI_VARIABLE_AUTHENTICATED_2
+ * descriptor without certificate data in it.
+ */
+ Payload = *Data;
+ PayloadSize = *DataSize;
+
+ DescriptorSize = offsetof(EFI_VARIABLE_AUTHENTICATION_2, AuthInfo)
+ + offsetof(WIN_CERTIFICATE_UEFI_GUID, CertData);
+ NewData = (UINT8 *) AllocateZeroPool(DescriptorSize + PayloadSize);
+ if (NewData == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ if ((Payload != NULL) && (PayloadSize != 0)) {
+ CopyMem(NewData + DescriptorSize, Payload, PayloadSize);
+ }
+
+ DescriptorData = (EFI_VARIABLE_AUTHENTICATION_2 *) (NewData);
+
+ ZeroMem(&Time, sizeof(EFI_TIME));
+ efi_status = gRT->GetTime(&Time, NULL);
+ if (EFI_ERROR(efi_status)) {
+ FreePool(NewData);
+ return efi_status;
+ }
+ Time.Pad1 = 0;
+ Time.Nanosecond = 0;
+ Time.TimeZone = 0;
+ Time.Daylight = 0;
+ Time.Pad2 = 0;
+ CopyMem(&DescriptorData->TimeStamp, &Time, sizeof(EFI_TIME));
+
+ DescriptorData->AuthInfo.Hdr.dwLength =
+ offsetof(WIN_CERTIFICATE_UEFI_GUID, CertData);
+ DescriptorData->AuthInfo.Hdr.wRevision = 0x0200;
+ DescriptorData->AuthInfo.Hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID;
+ DescriptorData->AuthInfo.CertType = EFI_CERT_TYPE_PKCS7_GUID;
+
+ /*
+ * we're expecting an EFI signature list, so don't free the input
+ * since it might not be in a pool
+ */
#if 0
- if (Payload != NULL) {
- FreePool(Payload);
- }
+ if (Payload != NULL) {
+ FreePool(Payload);
+ }
#endif
-
- *DataSize = DescriptorSize + PayloadSize;
- *Data = NewData;
- return EFI_SUCCESS;
+
+ *DataSize = DescriptorSize + PayloadSize;
+ *Data = NewData;
+ return EFI_SUCCESS;
}
EFI_STATUS
@@ -146,8 +140,9 @@ SetSecureVariable(CHAR16 *var, UINT8 *Data, UINTN len, EFI_GUID owner,
int ds;
efi_status = variable_create_esl(Data, len, &X509_GUID, NULL,
(void **)&Cert, &ds);
- if (efi_status != EFI_SUCCESS) {
- Print(L"Failed to create %s certificate %d\n", var, efi_status);
+ if (EFI_ERROR(efi_status)) {
+ console_print(L"Failed to create %s certificate %d\n",
+ var, efi_status);
return efi_status;
}
@@ -158,19 +153,18 @@ SetSecureVariable(CHAR16 *var, UINT8 *Data, UINTN len, EFI_GUID owner,
DataSize = len;
}
efi_status = CreateTimeBasedPayload(&DataSize, (UINT8 **)&Cert);
- if (efi_status != EFI_SUCCESS) {
- Print(L"Failed to create time based payload %d\n", efi_status);
+ if (EFI_ERROR(efi_status)) {
+ console_print(L"Failed to create time based payload %d\n",
+ efi_status);
return efi_status;
}
- efi_status = uefi_call_wrapper(RT->SetVariable, 5, var, &owner,
- EFI_VARIABLE_NON_VOLATILE
- | EFI_VARIABLE_RUNTIME_ACCESS
- | EFI_VARIABLE_BOOTSERVICE_ACCESS
- | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
- | options,
- DataSize, Cert);
-
+ efi_status = gRT->SetVariable(var, &owner,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_RUNTIME_ACCESS |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS |
+ options, DataSize, Cert);
return efi_status;
}
@@ -181,8 +175,9 @@ GetOSIndications(void)
UINTN DataSize = sizeof(indications);
EFI_STATUS efi_status;
- efi_status = uefi_call_wrapper(RT->GetVariable, 5, L"OsIndicationsSupported", &GV_GUID, NULL, &DataSize, &indications);
- if (efi_status != EFI_SUCCESS)
+ efi_status = gRT->GetVariable(L"OsIndicationsSupported", &GV_GUID,
+ NULL, &DataSize, &indications);
+ if (EFI_ERROR(efi_status))
return 0;
return indications;
@@ -194,17 +189,15 @@ SETOSIndicationsAndReboot(UINT64 indications)
UINTN DataSize = sizeof(indications);
EFI_STATUS efi_status;
- efi_status = uefi_call_wrapper(RT->SetVariable, 5, L"OsIndications",
- &GV_GUID,
- EFI_VARIABLE_NON_VOLATILE
- | EFI_VARIABLE_RUNTIME_ACCESS
- | EFI_VARIABLE_BOOTSERVICE_ACCESS,
- DataSize, &indications);
-
- if (efi_status != EFI_SUCCESS)
+ efi_status = gRT->SetVariable(L"OsIndications", &GV_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_RUNTIME_ACCESS |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ DataSize, &indications);
+ if (EFI_ERROR(efi_status))
return efi_status;
- uefi_call_wrapper(RT->ResetSystem, 4, EfiResetWarm, EFI_SUCCESS, 0, NULL);
+ gRT->ResetSystem(EfiResetWarm, EFI_SUCCESS, 0, NULL);
/* does not return */
return EFI_SUCCESS;
@@ -218,19 +211,19 @@ get_variable_attr(CHAR16 *var, UINT8 **data, UINTN *len, EFI_GUID owner,
*len = 0;
- efi_status = uefi_call_wrapper(RT->GetVariable, 5, var, &owner,
- NULL, len, NULL);
- if (efi_status != EFI_BUFFER_TOO_SMALL)
+ efi_status = gRT->GetVariable(var, &owner, NULL, len, NULL);
+ if (efi_status != EFI_BUFFER_TOO_SMALL) {
+ if (!EFI_ERROR(efi_status)) /* this should never happen */
+ return EFI_PROTOCOL_ERROR;
return efi_status;
+ }
*data = AllocateZeroPool(*len);
if (!*data)
return EFI_OUT_OF_RESOURCES;
-
- efi_status = uefi_call_wrapper(RT->GetVariable, 5, var, &owner,
- attributes, len, *data);
- if (efi_status != EFI_SUCCESS) {
+ efi_status = gRT->GetVariable(var, &owner, attributes, len, *data);
+ if (EFI_ERROR(efi_status)) {
FreePool(*data);
*data = NULL;
}
@@ -263,19 +256,19 @@ find_in_esl(UINT8 *Data, UINTN DataSize, UINT8 *key, UINTN keylen)
EFI_STATUS
find_in_variable_esl(CHAR16* var, EFI_GUID owner, UINT8 *key, UINTN keylen)
{
- UINTN DataSize;
- UINT8 *Data;
- EFI_STATUS status;
+ UINTN DataSize = 0;
+ UINT8 *Data = NULL;
+ EFI_STATUS efi_status;
- status = get_variable(var, &Data, &DataSize, owner);
- if (status != EFI_SUCCESS)
- return status;
+ efi_status = get_variable(var, &Data, &DataSize, owner);
+ if (EFI_ERROR(efi_status))
+ return efi_status;
- status = find_in_esl(Data, DataSize, key, keylen);
+ efi_status = find_in_esl(Data, DataSize, key, keylen);
FreePool(Data);
- return status;
+ return efi_status;
}
int
@@ -284,11 +277,11 @@ variable_is_setupmode(int default_return)
/* set to 1 because we return true if SetupMode doesn't exist */
UINT8 SetupMode = default_return;
UINTN DataSize = sizeof(SetupMode);
- EFI_STATUS status;
+ EFI_STATUS efi_status;
- status = uefi_call_wrapper(RT->GetVariable, 5, L"SetupMode", &GV_GUID, NULL,
- &DataSize, &SetupMode);
- if (EFI_ERROR(status))
+ efi_status = gRT->GetVariable(L"SetupMode", &GV_GUID, NULL,
+ &DataSize, &SetupMode);
+ if (EFI_ERROR(efi_status))
return default_return;
return SetupMode;
@@ -300,12 +293,12 @@ variable_is_secureboot(void)
/* return false if variable doesn't exist */
UINT8 SecureBoot = 0;
UINTN DataSize;
- EFI_STATUS status;
+ EFI_STATUS efi_status;
DataSize = sizeof(SecureBoot);
- status = uefi_call_wrapper(RT->GetVariable, 5, L"SecureBoot", &GV_GUID, NULL,
- &DataSize, &SecureBoot);
- if (EFI_ERROR(status))
+ efi_status = gRT->GetVariable(L"SecureBoot", &GV_GUID, NULL,
+ &DataSize, &SecureBoot);
+ if (EFI_ERROR(efi_status))
return 0;
return SecureBoot;
@@ -315,14 +308,15 @@ EFI_STATUS
variable_enroll_hash(CHAR16 *var, EFI_GUID owner,
UINT8 hash[SHA256_DIGEST_SIZE])
{
- EFI_STATUS status;
+ EFI_STATUS efi_status;
- if (find_in_variable_esl(var, owner, hash, SHA256_DIGEST_SIZE)
- == EFI_SUCCESS)
+ efi_status = find_in_variable_esl(var, owner, hash, SHA256_DIGEST_SIZE);
+ if (!EFI_ERROR(efi_status))
/* hash already present */
return EFI_ALREADY_STARTED;
- UINT8 sig[sizeof(EFI_SIGNATURE_LIST) + sizeof(EFI_SIGNATURE_DATA) - 1 + SHA256_DIGEST_SIZE];
+ UINT8 sig[sizeof(EFI_SIGNATURE_LIST)
+ + sizeof(EFI_SIGNATURE_DATA) - 1 + SHA256_DIGEST_SIZE];
EFI_SIGNATURE_LIST *l = (void *)sig;
EFI_SIGNATURE_DATA *d = (void *)sig + sizeof(EFI_SIGNATURE_LIST);
SetMem(sig, 0, sizeof(sig));
@@ -330,16 +324,16 @@ variable_enroll_hash(CHAR16 *var, EFI_GUID owner,
l->SignatureListSize = sizeof(sig);
l->SignatureSize = 16 +32; /* UEFI defined */
CopyMem(&d->SignatureData, hash, SHA256_DIGEST_SIZE);
- d->SignatureOwner = MOK_OWNER;
+ d->SignatureOwner = SHIM_LOCK_GUID;
if (CompareGuid(&owner, &SIG_DB) == 0)
- status = SetSecureVariable(var, sig, sizeof(sig), owner,
- EFI_VARIABLE_APPEND_WRITE, 0);
+ efi_status = SetSecureVariable(var, sig, sizeof(sig), owner,
+ EFI_VARIABLE_APPEND_WRITE, 0);
else
- status = uefi_call_wrapper(RT->SetVariable, 5, var, &owner,
- EFI_VARIABLE_NON_VOLATILE
- | EFI_VARIABLE_BOOTSERVICE_ACCESS
- | EFI_VARIABLE_APPEND_WRITE,
- sizeof(sig), sig);
- return status;
+ efi_status = gRT->SetVariable(var, &owner,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_APPEND_WRITE,
+ sizeof(sig), sig);
+ return efi_status;
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-09-02 08:59:04 +0000