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audk/SecurityPkg/Library/SecureBootVariableLib/SecureBootVariableLib.c

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/** @file
This library provides helper functions to set/clear Secure Boot
keys and databases.
Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2018 Hewlett Packard Enterprise Development LP<BR>
Copyright (c) 2021, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2021, Semihalf All rights reserved.<BR>
Copyright (c) Microsoft Corporation.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <UefiSecureBoot.h>
#include <Guid/GlobalVariable.h>
#include <Guid/AuthenticatedVariableFormat.h>
#include <Guid/ImageAuthentication.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/SecureBootVariableLib.h>
#include <Library/PlatformPKProtectionLib.h>
// This time can be used when deleting variables, as it should be greater than any variable time.
EFI_TIME mMaxTimestamp = {
0xFFFF, // Year
0xFF, // Month
0xFF, // Day
0xFF, // Hour
0xFF, // Minute
0xFF, // Second
0x00,
0x00000000, // Nanosecond
0,
0,
0x00
};
//
// This epoch time is the date that is used when creating SecureBoot default variables.
// NOTE: This is a placeholder date that doesn't correspond to anything else.
//
EFI_TIME mDefaultPayloadTimestamp = {
1970, // Year (1970)
1, // Month (Jan)
1, // Day (1)
0, // Hour
0, // Minute
0, // Second
0, // Pad1
0, // Nanosecond
0, // Timezone (Dummy value)
0, // Daylight (Dummy value)
0 // Pad2
};
/** Creates EFI Signature List structure.
@param[in] Data A pointer to signature data.
@param[in] Size Size of signature data.
@param[out] SigList Created Signature List.
@retval EFI_SUCCESS Signature List was created successfully.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
CreateSigList (
IN VOID *Data,
IN UINTN Size,
OUT EFI_SIGNATURE_LIST **SigList
)
{
UINTN SigListSize;
EFI_SIGNATURE_LIST *TmpSigList;
EFI_SIGNATURE_DATA *SigData;
//
// Allocate data for Signature Database
//
SigListSize = sizeof (EFI_SIGNATURE_LIST) + sizeof (EFI_SIGNATURE_DATA) - 1 + Size;
TmpSigList = (EFI_SIGNATURE_LIST *)AllocateZeroPool (SigListSize);
if (TmpSigList == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Only gEfiCertX509Guid type is supported
//
TmpSigList->SignatureListSize = (UINT32)SigListSize;
TmpSigList->SignatureSize = (UINT32)(sizeof (EFI_SIGNATURE_DATA) - 1 + Size);
TmpSigList->SignatureHeaderSize = 0;
CopyGuid (&TmpSigList->SignatureType, &gEfiCertX509Guid);
//
// Copy key data
//
SigData = (EFI_SIGNATURE_DATA *)(TmpSigList + 1);
CopyGuid (&SigData->SignatureOwner, &gEfiGlobalVariableGuid);
CopyMem (&SigData->SignatureData[0], Data, Size);
*SigList = TmpSigList;
return EFI_SUCCESS;
}
/** Adds new signature list to signature database.
@param[in] SigLists A pointer to signature database.
@param[in] SigListAppend A signature list to be added.
@param[out] *SigListOut Created signature database.
@param[in, out] SigListsSize A size of created signature database.
@retval EFI_SUCCESS Signature List was added successfully.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
ConcatenateSigList (
IN EFI_SIGNATURE_LIST *SigLists,
IN EFI_SIGNATURE_LIST *SigListAppend,
OUT EFI_SIGNATURE_LIST **SigListOut,
IN OUT UINTN *SigListsSize
)
{
EFI_SIGNATURE_LIST *TmpSigList;
UINT8 *Offset;
UINTN NewSigListsSize;
NewSigListsSize = *SigListsSize + SigListAppend->SignatureListSize;
TmpSigList = (EFI_SIGNATURE_LIST *)AllocateZeroPool (NewSigListsSize);
if (TmpSigList == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (TmpSigList, SigLists, *SigListsSize);
Offset = (UINT8 *)TmpSigList;
Offset += *SigListsSize;
CopyMem ((VOID *)Offset, SigListAppend, SigListAppend->SignatureListSize);
*SigListsSize = NewSigListsSize;
*SigListOut = TmpSigList;
return EFI_SUCCESS;
}
/**
Create a EFI Signature List with data supplied from input argument.
The input certificates from KeyInfo parameter should be DER-encoded
format.
@param[out] SigListsSize A pointer to size of signature list
@param[out] SigListOut A pointer to a callee-allocated buffer with signature lists
@param[in] KeyInfoCount The number of certificate pointer and size pairs inside KeyInfo.
@param[in] KeyInfo A pointer to all certificates, in the format of DER-encoded,
to be concatenated into signature lists.
@retval EFI_SUCCESS Created signature list from payload successfully.
@retval EFI_NOT_FOUND Section with key has not been found.
@retval EFI_INVALID_PARAMETER Embedded key has a wrong format or input pointers are NULL.
@retval Others Unexpected error happens.
**/
EFI_STATUS
EFIAPI
SecureBootCreateDataFromInput (
OUT UINTN *SigListsSize,
OUT EFI_SIGNATURE_LIST **SigListOut,
IN UINTN KeyInfoCount,
IN CONST SECURE_BOOT_CERTIFICATE_INFO *KeyInfo
)
{
EFI_SIGNATURE_LIST *EfiSig;
EFI_SIGNATURE_LIST *TmpEfiSig;
EFI_SIGNATURE_LIST *TmpEfiSig2;
EFI_STATUS Status;
VOID *Buffer;
UINTN Size;
UINTN InputIndex;
UINTN KeyIndex;
if ((SigListOut == NULL) || (SigListsSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
if ((KeyInfoCount == 0) || (KeyInfo == NULL)) {
return EFI_INVALID_PARAMETER;
}
InputIndex = 0;
KeyIndex = 0;
EfiSig = NULL;
*SigListsSize = 0;
while (InputIndex < KeyInfoCount) {
if (KeyInfo[InputIndex].Data != NULL) {
Size = KeyInfo[InputIndex].DataSize;
Buffer = AllocateCopyPool (Size, KeyInfo[InputIndex].Data);
if (Buffer == NULL) {
if (EfiSig != NULL) {
FreePool (EfiSig);
}
return EFI_OUT_OF_RESOURCES;
}
Status = CreateSigList (Buffer, Size, &TmpEfiSig);
if (EFI_ERROR (Status)) {
FreePool (Buffer);
break;
}
//
// Concatenate lists if more than one section found
//
if (KeyIndex == 0) {
EfiSig = TmpEfiSig;
*SigListsSize = TmpEfiSig->SignatureListSize;
} else {
ConcatenateSigList (EfiSig, TmpEfiSig, &TmpEfiSig2, SigListsSize);
FreePool (EfiSig);
FreePool (TmpEfiSig);
EfiSig = TmpEfiSig2;
}
KeyIndex++;
FreePool (Buffer);
}
InputIndex++;
}
if (KeyIndex == 0) {
return EFI_NOT_FOUND;
}
*SigListOut = EfiSig;
return EFI_SUCCESS;
}
/**
Create a time based data payload by concatenating the EFI_VARIABLE_AUTHENTICATION_2
descriptor with the input data. NO authentication is required in this function.
@param[in, out] DataSize On input, the size of Data buffer in bytes.
On output, the size of data returned in Data
buffer in bytes.
@param[in, out] Data On input, Pointer to data buffer to be wrapped or
pointer to NULL to wrap an empty payload.
On output, Pointer to the new payload date buffer allocated from pool,
it's caller's responsibility to free the memory when finish using it.
@param[in] Time Pointer to time information to created time based payload.
@retval EFI_SUCCESS Create time based payload successfully.
@retval EFI_OUT_OF_RESOURCES There are not enough memory resources to create time based payload.
@retval EFI_INVALID_PARAMETER The parameter is invalid.
@retval Others Unexpected error happens.
--*/
EFI_STATUS
EFIAPI
CreateTimeBasedPayload (
IN OUT UINTN *DataSize,
IN OUT UINT8 **Data,
IN EFI_TIME *Time
)
{
UINT8 *NewData;
UINT8 *Payload;
UINTN PayloadSize;
EFI_VARIABLE_AUTHENTICATION_2 *DescriptorData;
UINTN DescriptorSize;
if ((Data == NULL) || (DataSize == NULL) || (Time == NULL)) {
DEBUG ((DEBUG_ERROR, "%a(), invalid arg\n", __func__));
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) {
DEBUG ((DEBUG_ERROR, "%a() Out of resources.\n", __func__));
return EFI_OUT_OF_RESOURCES;
}
if ((Payload != NULL) && (PayloadSize != 0)) {
CopyMem (NewData + DescriptorSize, Payload, PayloadSize);
}
DescriptorData = (EFI_VARIABLE_AUTHENTICATION_2 *)(NewData);
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;
CopyGuid (&DescriptorData->AuthInfo.CertType, &gEfiCertPkcs7Guid);
if (Payload != NULL) {
FreePool (Payload);
Payload = NULL;
}
*DataSize = DescriptorSize + PayloadSize;
*Data = NewData;
return EFI_SUCCESS;
}
/**
Internal helper function to delete a Variable given its name and GUID, NO authentication
required.
@param[in] VariableName Name of the Variable.
@param[in] VendorGuid GUID of the Variable.
@retval EFI_SUCCESS Variable deleted successfully.
@retval Others The driver failed to start the device.
**/
EFI_STATUS
EFIAPI
DeleteVariable (
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid
)
{
EFI_STATUS Status;
VOID *Variable;
UINT8 *Data;
UINTN DataSize;
UINT32 Attr;
GetVariable2 (VariableName, VendorGuid, &Variable, NULL);
if (Variable == NULL) {
return EFI_SUCCESS;
}
FreePool (Variable);
Data = NULL;
DataSize = 0;
Attr = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS
| EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS;
Status = CreateTimeBasedPayload (&DataSize, &Data, &mMaxTimestamp);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Fail to create time-based data payload: %r", Status));
return Status;
}
Status = gRT->SetVariable (
VariableName,
VendorGuid,
Attr,
DataSize,
Data
);
if (Data != NULL) {
FreePool (Data);
}
return Status;
}
/**
Set the platform secure boot mode into "Custom" or "Standard" mode.
@param[in] SecureBootMode New secure boot mode: STANDARD_SECURE_BOOT_MODE or
CUSTOM_SECURE_BOOT_MODE.
@return EFI_SUCCESS The platform has switched to the special mode successfully.
@return other Fail to operate the secure boot mode.
**/
EFI_STATUS
EFIAPI
SetSecureBootMode (
IN UINT8 SecureBootMode
)
{
return gRT->SetVariable (
EFI_CUSTOM_MODE_NAME,
&gEfiCustomModeEnableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (UINT8),
&SecureBootMode
);
}
/**
Fetches the value of SetupMode variable.
@param[out] SetupMode Pointer to UINT8 for SetupMode output
@retval other Retval from GetVariable.
**/
EFI_STATUS
EFIAPI
GetSetupMode (
OUT UINT8 *SetupMode
)
{
UINTN Size;
EFI_STATUS Status;
Size = sizeof (*SetupMode);
Status = gRT->GetVariable (
EFI_SETUP_MODE_NAME,
&gEfiGlobalVariableGuid,
NULL,
&Size,
SetupMode
);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
/**
Helper function to quickly determine whether SecureBoot is enabled.
@retval TRUE SecureBoot is verifiably enabled.
@retval FALSE SecureBoot is either disabled or an error prevented checking.
**/
BOOLEAN
EFIAPI
IsSecureBootEnabled (
VOID
)
{
EFI_STATUS Status;
UINT8 *SecureBoot;
SecureBoot = NULL;
Status = GetEfiGlobalVariable2 (EFI_SECURE_BOOT_MODE_NAME, (VOID **)&SecureBoot, NULL);
//
// Skip verification if SecureBoot variable doesn't exist.
//
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Cannot check SecureBoot variable %r \n ", Status));
return FALSE;
}
//
// Skip verification if SecureBoot is disabled but not AuditMode
//
if (*SecureBoot == SECURE_BOOT_MODE_DISABLE) {
FreePool (SecureBoot);
return FALSE;
} else {
return TRUE;
}
}
/**
Clears the content of the 'db' variable.
@retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
while VendorGuid is NULL.
@retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
**/
EFI_STATUS
EFIAPI
DeleteDb (
VOID
)
{
EFI_STATUS Status;
Status = DeleteVariable (
EFI_IMAGE_SECURITY_DATABASE,
&gEfiImageSecurityDatabaseGuid
);
return Status;
}
/**
Clears the content of the 'dbx' variable.
@retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
while VendorGuid is NULL.
@retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
**/
EFI_STATUS
EFIAPI
DeleteDbx (
VOID
)
{
EFI_STATUS Status;
Status = DeleteVariable (
EFI_IMAGE_SECURITY_DATABASE1,
&gEfiImageSecurityDatabaseGuid
);
return Status;
}
/**
Clears the content of the 'dbt' variable.
@retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
while VendorGuid is NULL.
@retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
**/
EFI_STATUS
EFIAPI
DeleteDbt (
VOID
)
{
EFI_STATUS Status;
Status = DeleteVariable (
EFI_IMAGE_SECURITY_DATABASE2,
&gEfiImageSecurityDatabaseGuid
);
return Status;
}
/**
Clears the content of the 'KEK' variable.
@retval EFI_OUT_OF_RESOURCES If memory allocation for EFI_VARIABLE_AUTHENTICATION_2 fails
while VendorGuid is NULL.
@retval other Errors from GetVariable2 (), GetTime () and SetVariable ()
**/
EFI_STATUS
EFIAPI
DeleteKEK (
VOID
)
{
EFI_STATUS Status;
Status = DeleteVariable (
EFI_KEY_EXCHANGE_KEY_NAME,
&gEfiGlobalVariableGuid
);
return Status;
}
/**
Remove the PK variable.
@retval EFI_SUCCESS Delete PK successfully.
@retval Others Could not allow to delete PK.
**/
EFI_STATUS
EFIAPI
DeletePlatformKey (
VOID
)
{
EFI_STATUS Status;
Status = SetSecureBootMode (CUSTOM_SECURE_BOOT_MODE);
if (EFI_ERROR (Status)) {
return Status;
}
Status = DeleteVariable (
EFI_PLATFORM_KEY_NAME,
&gEfiGlobalVariableGuid
);
return Status;
}
/**
This function will delete the secure boot keys, thus
disabling secure boot.
@return EFI_SUCCESS or underlying failure code.
**/
EFI_STATUS
EFIAPI
DeleteSecureBootVariables (
VOID
)
{
EFI_STATUS Status, TempStatus;
DEBUG ((DEBUG_INFO, "%a - Attempting to delete the Secure Boot variables.\n", __func__));
//
// Step 1: Notify that a PK update is coming shortly...
Status = DisablePKProtection ();
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a - Failed to signal PK update start! %r\n", __func__, Status));
// Classify this as a PK deletion error.
Status = EFI_ABORTED;
}
//
// Step 2: Attempt to delete the PK.
// Let's try to nuke the PK, why not...
if (!EFI_ERROR (Status)) {
Status = DeletePlatformKey ();
DEBUG ((DEBUG_INFO, "%a - PK Delete = %r\n", __func__, Status));
// If the PK is not found, then our work here is done.
if (Status == EFI_NOT_FOUND) {
Status = EFI_SUCCESS;
}
// If any other error occurred, let's inform the caller that the PK delete in particular failed.
else if (EFI_ERROR (Status)) {
Status = EFI_ABORTED;
}
}
//
// Step 3: Attempt to delete remaining keys/databases...
// Now that the PK is deleted (assuming Status == EFI_SUCCESS) the system is in SETUP_MODE.
// Arguably we could leave these variables in place and let them be deleted by whoever wants to
// update all the SecureBoot variables. However, for cleanliness sake, let's try to
// get rid of them here.
if (!EFI_ERROR (Status)) {
//
// If any of THESE steps have an error, report the error but attempt to delete all keys.
// Using TempStatus will prevent an error from being trampled by an EFI_SUCCESS.
// Overwrite Status ONLY if TempStatus is an error.
//
// If the error is EFI_NOT_FOUND, we can safely ignore it since we were trying to delete
// the variables anyway.
//
TempStatus = DeleteKEK ();
DEBUG ((DEBUG_INFO, "%a - KEK Delete = %r\n", __func__, TempStatus));
if (EFI_ERROR (TempStatus) && (TempStatus != EFI_NOT_FOUND)) {
Status = EFI_ACCESS_DENIED;
}
TempStatus = DeleteDb ();
DEBUG ((DEBUG_INFO, "%a - db Delete = %r\n", __func__, TempStatus));
if (EFI_ERROR (TempStatus) && (TempStatus != EFI_NOT_FOUND)) {
Status = EFI_ACCESS_DENIED;
}
TempStatus = DeleteDbx ();
DEBUG ((DEBUG_INFO, "%a - dbx Delete = %r\n", __func__, TempStatus));
if (EFI_ERROR (TempStatus) && (TempStatus != EFI_NOT_FOUND)) {
Status = EFI_ACCESS_DENIED;
}
TempStatus = DeleteDbt ();
DEBUG ((DEBUG_INFO, "%a - dbt Delete = %r\n", __func__, TempStatus));
if (EFI_ERROR (TempStatus) && (TempStatus != EFI_NOT_FOUND)) {
Status = EFI_ACCESS_DENIED;
}
}
return Status;
}// DeleteSecureBootVariables()
/**
A helper function to take in a variable payload, wrap it in the
proper authenticated variable structure, and install it in the
EFI variable space.
@param[in] VariableName The name of the key/database.
@param[in] VendorGuid The namespace (ie. vendor GUID) of the variable
@param[in] DataSize Size parameter for target secure boot variable.
@param[in] Data Pointer to signature list formatted secure boot variable content.
@retval EFI_SUCCESS The enrollment for authenticated variable was successful.
@retval EFI_OUT_OF_RESOURCES There are not enough memory resources to create time based payload.
@retval EFI_INVALID_PARAMETER The parameter is invalid.
@retval Others Unexpected error happens.
**/
EFI_STATUS
EFIAPI
EnrollFromInput (
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
IN UINTN DataSize,
IN VOID *Data
)
{
VOID *Payload;
UINTN PayloadSize;
EFI_STATUS Status;
Payload = NULL;
if ((VariableName == NULL) || (VendorGuid == 0)) {
DEBUG ((DEBUG_ERROR, "Input vendor variable invalid: %p and %p\n", VariableName, VendorGuid));
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
if ((Data == NULL) || (DataSize == 0)) {
// You might as well just use DeleteVariable...
DEBUG ((DEBUG_ERROR, "Input argument invalid: %p: %x\n", Data, DataSize));
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
// Bring in the noise...
PayloadSize = DataSize;
Payload = AllocateZeroPool (DataSize);
// Bring in the funk...
if (Payload == NULL) {
return EFI_OUT_OF_RESOURCES;
} else {
CopyMem (Payload, Data, DataSize);
}
Status = CreateTimeBasedPayload (&PayloadSize, (UINT8 **)&Payload, &mDefaultPayloadTimestamp);
if (EFI_ERROR (Status) || (Payload == NULL)) {
DEBUG ((DEBUG_ERROR, "Fail to create time-based data payload: %r\n", Status));
Payload = NULL;
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
//
// Allocate memory for auth variable
//
Status = gRT->SetVariable (
VariableName,
VendorGuid,
(EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS |
EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS),
PayloadSize,
Payload
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"error: %a (\"%s\", %g): %r\n",
__func__,
VariableName,
VendorGuid,
Status
));
}
Exit:
//
// Always Put Away Your Toys
// Payload will be reassigned by CreateTimeBasedPayload()...
if (Payload != NULL) {
FreePool (Payload);
Payload = NULL;
}
return Status;
}
/**
Similar to DeleteSecureBootVariables, this function is used to unilaterally
force the state of related SB variables (db, dbx, dbt, KEK, PK, etc.) to be
the built-in, hardcoded default vars.
@param[in] SecureBootPayload Payload information for secure boot related keys.
@retval EFI_SUCCESS SecureBoot keys are now set to defaults.
@retval EFI_ABORTED SecureBoot keys are not empty. Please delete keys first
or follow standard methods of altering keys (ie. use the signing system).
@retval EFI_SECURITY_VIOLATION Failed to create the PK.
@retval Others Something failed in one of the subfunctions.
**/
EFI_STATUS
EFIAPI
SetSecureBootVariablesToDefault (
IN CONST SECURE_BOOT_PAYLOAD_INFO *SecureBootPayload
)
{
EFI_STATUS Status;
UINT8 *Data;
UINTN DataSize;
DEBUG ((DEBUG_INFO, "%a() Entry\n", __func__));
if (SecureBootPayload == NULL) {
DEBUG ((DEBUG_ERROR, "%a - Invalid SecureBoot payload is supplied!\n", __func__));
return EFI_INVALID_PARAMETER;
}
//
// Right off the bat, if SecureBoot is currently enabled, bail.
if (IsSecureBootEnabled ()) {
DEBUG ((DEBUG_ERROR, "%a - Cannot set default keys while SecureBoot is enabled!\n", __func__));
return EFI_ABORTED;
}
DEBUG ((DEBUG_INFO, "%a - Setting up key %s!\n", __func__, SecureBootPayload->SecureBootKeyName));
//
// Start running down the list, creating variables in our wake.
// dbx is a good place to start.
Data = (UINT8 *)SecureBootPayload->DbxPtr;
DataSize = SecureBootPayload->DbxSize;
Status = EnrollFromInput (
EFI_IMAGE_SECURITY_DATABASE1,
&gEfiImageSecurityDatabaseGuid,
DataSize,
Data
);
// If that went well, try the db (make sure to pick the right one!).
if (!EFI_ERROR (Status)) {
Data = (UINT8 *)SecureBootPayload->DbPtr;
DataSize = SecureBootPayload->DbSize;
Status = EnrollFromInput (
EFI_IMAGE_SECURITY_DATABASE,
&gEfiImageSecurityDatabaseGuid,
DataSize,
Data
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a - Failed to enroll DB %r!\n", __func__, Status));
}
} else {
DEBUG ((DEBUG_ERROR, "%a - Failed to enroll DBX %r!\n", __func__, Status));
}
// Keep it going. Keep it going. dbt if supplied...
if (!EFI_ERROR (Status) && (SecureBootPayload->DbtPtr != NULL)) {
Data = (UINT8 *)SecureBootPayload->DbtPtr;
DataSize = SecureBootPayload->DbtSize;
Status = EnrollFromInput (
EFI_IMAGE_SECURITY_DATABASE2,
&gEfiImageSecurityDatabaseGuid,
DataSize,
Data
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a - Failed to enroll DBT %r!\n", __func__, Status));
}
}
// Keep it going. Keep it going. KEK...
if (!EFI_ERROR (Status)) {
Data = (UINT8 *)SecureBootPayload->KekPtr;
DataSize = SecureBootPayload->KekSize;
Status = EnrollFromInput (
EFI_KEY_EXCHANGE_KEY_NAME,
&gEfiGlobalVariableGuid,
DataSize,
Data
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a - Failed to enroll KEK %r!\n", __func__, Status));
}
}
//
// Finally! The Big Daddy of them all.
// The PK!
//
if (!EFI_ERROR (Status)) {
//
// Finally, install the key.
Data = (UINT8 *)SecureBootPayload->PkPtr;
DataSize = SecureBootPayload->PkSize;
Status = EnrollFromInput (
EFI_PLATFORM_KEY_NAME,
&gEfiGlobalVariableGuid,
DataSize,
Data
);
//
// Report PK creation errors.
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a - Failed to update the PK! - %r\n", __func__, Status));
Status = EFI_SECURITY_VIOLATION;
}
}
return Status;
}
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