/** @file
Usb Credential Provider driver implemenetation.
Copyright (c) 2009 - 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 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 "UsbCredentialProvider.h"
CREDENTIAL_TABLE *mUsbTable = NULL;
USB_PROVIDER_CALLBACK_INFO *mCallbackInfo = NULL;
USB_CREDENTIAL_INFO *mUsbInfoHandle = NULL;
EFI_USER_CREDENTIAL2_PROTOCOL gUsbCredentialProviderDriver = {
USB_CREDENTIAL_PROVIDER_GUID,
EFI_USER_CREDENTIAL_CLASS_SECURE_CARD,
CredentialEnroll,
CredentialForm,
CredentialTile,
CredentialTitle,
CredentialUser,
CredentialSelect,
CredentialDeselect,
CredentialDefault,
CredentialGetInfo,
CredentialGetNextInfo,
EFI_CREDENTIAL_CAPABILITIES_ENROLL,
CredentialDelete
};
/**
Get string by string id from HII Interface.
@param[in] Id String ID to get the string from.
@retval CHAR16 * String from ID.
@retval NULL If error occurs.
**/
CHAR16 *
GetStringById (
IN EFI_STRING_ID Id
)
{
//
// Get the current string for the current Language
//
return HiiGetString (mCallbackInfo->HiiHandle, Id, NULL);
}
/**
Expand password table size.
**/
VOID
ExpandTableSize (
VOID
)
{
CREDENTIAL_TABLE *NewTable;
UINTN Count;
Count = mUsbTable->MaxCount + USB_TABLE_INC;
//
// Create new credential table.
//
NewTable = AllocateZeroPool (
sizeof (CREDENTIAL_TABLE) - sizeof (USB_INFO) +
Count * sizeof (USB_INFO)
);
ASSERT (NewTable != NULL);
NewTable->MaxCount = Count;
NewTable->Count = mUsbTable->Count;
//
// Copy old entries.
//
CopyMem (
&NewTable->UserInfo,
&mUsbTable->UserInfo,
mUsbTable->Count * sizeof (USB_INFO)
);
FreePool (mUsbTable);
mUsbTable = NewTable;
}
/**
Add, update or delete info in table, and sync with NV variable.
@param[in] Index The index of the password in table. If index is found in
table, update the info, else add the into to table.
@param[in] Info The new credential info to add into table. If Info is NULL,
delete the info by Index.
@retval EFI_INVALID_PARAMETER Info is NULL when save the info.
@retval EFI_SUCCESS Modify the table successfully.
@retval Others Failed to modify the table.
**/
EFI_STATUS
ModifyTable (
IN UINTN Index,
IN USB_INFO * Info OPTIONAL
)
{
EFI_STATUS Status;
USB_INFO *NewUsbInfo;
NewUsbInfo = NULL;
if (Index < mUsbTable->Count) {
if (Info == NULL) {
//
// Delete the specified entry.
//
mUsbTable->Count--;
if (Index != mUsbTable->Count) {
NewUsbInfo = &mUsbTable->UserInfo[mUsbTable->Count];
}
} else {
//
// Update the specified entry.
//
NewUsbInfo = Info;
}
} else {
//
// Add a new entry
//
if (Info == NULL) {
return EFI_INVALID_PARAMETER;
}
if (mUsbTable->Count >= mUsbTable->MaxCount) {
ExpandTableSize ();
}
NewUsbInfo = Info;
mUsbTable->Count++;
}
if (NewUsbInfo != NULL) {
CopyMem (&mUsbTable->UserInfo[Index], NewUsbInfo, sizeof (USB_INFO));
}
//
// Save the credential table.
//
Status = gRT->SetVariable (
L"UsbCredential",
&gUsbCredentialProviderGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
mUsbTable->Count * sizeof (USB_INFO),
&mUsbTable->UserInfo
);
return Status;
}
/**
Create a credential table
@retval EFI_SUCCESS Create a credential table successfully.
@retval Others Failed to create a password.
**/
EFI_STATUS
InitCredentialTable (
VOID
)
{
EFI_STATUS Status;
UINT8 *Var;
UINTN VarSize;
//
// Get Usb credential data from NV variable.
//
VarSize = 0;
Var = NULL;
Status = gRT->GetVariable (
L"UsbCredential",
&gUsbCredentialProviderGuid,
NULL,
&VarSize,
Var
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Var = AllocateZeroPool (VarSize);
if (Var == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetVariable (
L"UsbCredential",
&gUsbCredentialProviderGuid,
NULL,
&VarSize,
Var
);
}
if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
return Status;
}
//
// Init Usb credential table.
//
mUsbTable = AllocateZeroPool (
sizeof (CREDENTIAL_TABLE) - sizeof (USB_INFO) +
USB_TABLE_INC * sizeof (USB_INFO) +
VarSize
);
if (mUsbTable == NULL) {
FreePool (Var);
return EFI_OUT_OF_RESOURCES;
}
mUsbTable->Count = VarSize / sizeof (USB_INFO);
mUsbTable->MaxCount = mUsbTable->Count + USB_TABLE_INC;
if (Var != NULL) {
CopyMem (mUsbTable->UserInfo, Var, VarSize);
FreePool (Var);
}
return EFI_SUCCESS;
}
/**
Read the specified file by FileName in the Usb key and return the file size in BufferSize
and file content in Buffer.
Note: the caller is responsible to free the buffer memory.
@param FileName File to read.
@param Buffer Returned with data read from the file.
@param BufferSize Size of the data buffer.
@retval EFI_SUCCESS The command completed successfully.
@retval EFI_OUT_OF_RESOURCES Resource allocation failed.
@retval EFI_NOT_FOUND File not found.
@retval EFI_DEVICE_ERROR Device I/O error.
**/
EFI_STATUS
GetFileData (
IN CHAR16 *FileName,
OUT VOID **Buffer,
OUT UINTN *BufferSize
)
{
EFI_STATUS Status;
UINTN Index;
UINTN HandleCount;
UINTN ScratchBufferSize;
EFI_HANDLE *HandleBuffer;
EFI_FILE *RootFs;
EFI_FILE *FileHandle;
EFI_FILE_INFO *FileInfo;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFileSystem;
EFI_BLOCK_IO_PROTOCOL *BlkIo;
FileInfo = NULL;
FileHandle = NULL;
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiSimpleFileSystemProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Can not Locate SimpleFileSystemProtocol\n"));
goto Done;
}
//
// Find and open the file in removable media disk.
//
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiBlockIoProtocolGuid,
(VOID **) &BlkIo
);
if (EFI_ERROR (Status)) {
continue;
}
if (BlkIo->Media->RemovableMedia) {
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiSimpleFileSystemProtocolGuid,
(VOID **) &SimpleFileSystem
);
if (EFI_ERROR (Status)) {
continue;
}
Status = SimpleFileSystem->OpenVolume (
SimpleFileSystem,
&RootFs
);
if (EFI_ERROR (Status)) {
continue;
}
Status = RootFs->Open (
RootFs,
&FileHandle,
FileName,
EFI_FILE_MODE_READ,
0
);
if (!EFI_ERROR (Status)) {
break;
}
}
}
FreePool (HandleBuffer);
if (Index >= HandleCount) {
DEBUG ((DEBUG_ERROR, "Can not found the token file!\n"));
Status = EFI_NOT_FOUND;
goto Done;
}
//
// Figure out how big the file is.
//
ScratchBufferSize = 0;
Status = FileHandle->GetInfo (
FileHandle,
&gEfiFileInfoGuid,
&ScratchBufferSize,
NULL
);
if (EFI_ERROR (Status) && (Status != EFI_BUFFER_TOO_SMALL)) {
DEBUG ((DEBUG_ERROR, "Can not obtain file size info!\n"));
Status = EFI_DEVICE_ERROR;
goto Done;
}
FileInfo = AllocateZeroPool (ScratchBufferSize);
if (FileInfo == NULL) {
DEBUG ((DEBUG_ERROR, "Can not allocate enough memory for the token file!\n"));
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
Status = FileHandle->GetInfo (
FileHandle,
&gEfiFileInfoGuid,
&ScratchBufferSize,
FileInfo
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Can not obtain file info from the token file!\n"));
Status = EFI_DEVICE_ERROR;
goto Done;
}
//
// Allocate a buffer for the file.
//
*BufferSize = (UINT32) FileInfo->FileSize;
*Buffer = AllocateZeroPool (*BufferSize);
if (*Buffer == NULL) {
DEBUG ((DEBUG_ERROR, "Can not allocate a buffer for the file!\n"));
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
//
// Load file into the allocated memory.
//
Status = FileHandle->Read (FileHandle, BufferSize, *Buffer);
if (EFI_ERROR (Status)) {
FreePool (*Buffer);
DEBUG ((DEBUG_ERROR, "Can not read the token file!\n"));
Status = EFI_DEVICE_ERROR;
goto Done;
}
//
// Close file.
//
Status = FileHandle->Close (FileHandle);
if (EFI_ERROR (Status)) {
FreePool (*Buffer);
DEBUG ((DEBUG_ERROR, "Can not close the token file !\n"));
Status = EFI_DEVICE_ERROR;
}
Done:
if (FileInfo != NULL) {
FreePool (FileInfo);
}
return Status;
}
/**
Hash the data to get credential.
@param[in] Buffer Points to the data buffer
@param[in] BufferSize The size of data in buffer, in bytes.
@param[out] Credential Points to the hashed result
@retval TRUE Hash the data successfully.
@retval FALSE Failed to hash the data.
**/
BOOLEAN
GenerateCredential (
IN UINT8 *Buffer,
IN UINTN BufferSize,
OUT UINT8 *Credential
)
{
BOOLEAN Status;
UINTN HashSize;
VOID *Hash;
HashSize = Sha1GetContextSize ();
Hash = AllocatePool (HashSize);
ASSERT (Hash != NULL);
Status = Sha1Init (Hash);
if (!Status) {
goto Done;
}
Status = Sha1Update (Hash, Buffer, BufferSize);
if (!Status) {
goto Done;
}
Status = Sha1Final (Hash, Credential);
Done:
FreePool (Hash);
return Status;
}
/**
Read the token file, and default the Token is saved at the begining of the file.
@param[out] Token Token read from a Token file.
@retval EFI_SUCCESS Read a Token successfully.
@retval Others Fails to read a Token.
**/
EFI_STATUS
GetToken (
OUT UINT8 *Token
)
{
EFI_STATUS Status;
UINT8 *Buffer;
UINTN BufSize;
CHAR16 *TokenFile;
BufSize = 0;
Buffer = NULL;
TokenFile = FixedPcdGetPtr (PcdFixedUsbCredentialProviderTokenFileName);
Status = GetFileData (TokenFile, (VOID *)&Buffer, &BufSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Read file %s from USB error! Status=(%r)\n", TokenFile, Status));
return Status;
}
if (!GenerateCredential (Buffer, BufSize, Token)) {
DEBUG ((DEBUG_ERROR, "Generate credential from read data failed!\n"));
FreePool (Buffer);
return EFI_SECURITY_VIOLATION;
}
FreePool (Buffer);
return EFI_SUCCESS;
}
/**
Find a user infomation record by the information record type.
This function searches all user information records of User from beginning
until either the information is found or there are no more user infomation
record. A match occurs when a Info.InfoType field matches the user information
record type.
@param[in] User Points to the user profile record to search.
@param[in] InfoType The infomation type to be searched.
@param[out] Info Points to the user info found, the caller is responsible
to free.
@retval EFI_SUCCESS Find the user information successfully.
@retval Others Fail to find the user information.
**/
EFI_STATUS
FindUserInfoByType (
IN EFI_USER_PROFILE_HANDLE User,
IN UINT8 InfoType,
OUT EFI_USER_INFO **Info
)
{
EFI_STATUS Status;
EFI_USER_INFO *UserInfo;
UINTN UserInfoSize;
EFI_USER_INFO_HANDLE UserInfoHandle;
EFI_USER_MANAGER_PROTOCOL *UserManager;
//
// Find user information by information type.
//
if (Info == NULL) {
return EFI_INVALID_PARAMETER;
}
Status = gBS->LocateProtocol (
&gEfiUserManagerProtocolGuid,
NULL,
(VOID **) &UserManager
);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
//
// Get each user information.
//
UserInfoHandle = NULL;
UserInfo = NULL;
UserInfoSize = 0;
while (TRUE) {
Status = UserManager->GetNextInfo (UserManager, User, &UserInfoHandle);
if (EFI_ERROR (Status)) {
break;
}
//
// Get information.
//
Status = UserManager->GetInfo (
UserManager,
User,
UserInfoHandle,
UserInfo,
&UserInfoSize
);
if (Status == EFI_BUFFER_TOO_SMALL) {
if (UserInfo != NULL) {
FreePool (UserInfo);
}
UserInfo = AllocateZeroPool (UserInfoSize);
if (UserInfo == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = UserManager->GetInfo (
UserManager,
User,
UserInfoHandle,
UserInfo,
&UserInfoSize
);
}
if (EFI_ERROR (Status)) {
break;
}
ASSERT (UserInfo != NULL);
if (UserInfo->InfoType == InfoType) {
*Info = UserInfo;
return EFI_SUCCESS;
}
}
if (UserInfo != NULL) {
FreePool (UserInfo);
}
return Status;
}
/**
This function initialize the data mainly used in form browser.
@retval EFI_SUCCESS Initialize form data successfully.
@retval Others Fail to Initialize form data.
**/
EFI_STATUS
InitFormBrowser (
VOID
)
{
USB_PROVIDER_CALLBACK_INFO *CallbackInfo;
//
// Initialize driver private data.
//
CallbackInfo = AllocateZeroPool (sizeof (USB_PROVIDER_CALLBACK_INFO));
if (CallbackInfo == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CallbackInfo->DriverHandle = NULL;
//
// Publish HII data.
//
CallbackInfo->HiiHandle = HiiAddPackages (
&gUsbCredentialProviderGuid,
CallbackInfo->DriverHandle,
UsbCredentialProviderStrings,
NULL
);
if (CallbackInfo->HiiHandle == NULL) {
return EFI_OUT_OF_RESOURCES;
}
mCallbackInfo = CallbackInfo;
return EFI_SUCCESS;
}
/**
Enroll a user on a credential provider.
This function enrolls a user on this credential provider. If the user exists on
this credential provider, update the user information on this credential provider;
otherwise add the user information on credential provider.
@param[in] This Points to this instance of EFI_USER_CREDENTIAL2_PROTOCOL.
@param[in] User The user profile to enroll.
@retval EFI_SUCCESS User profile was successfully enrolled.
@retval EFI_ACCESS_DENIED Current user profile does not permit enrollment on the
user profile handle. Either the user profile cannot enroll
on any user profile or cannot enroll on a user profile
other than the current user profile.
@retval EFI_UNSUPPORTED This credential provider does not support enrollment in
the pre-OS.
@retval EFI_DEVICE_ERROR The new credential could not be created because of a device
error.
@retval EFI_INVALID_PARAMETER User does not refer to a valid user profile handle.
**/
EFI_STATUS
EFIAPI
CredentialEnroll (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
IN EFI_USER_PROFILE_HANDLE User
)
{
EFI_STATUS Status;
UINTN Index;
USB_INFO UsbInfo;
EFI_USER_INFO *UserInfo;
EFI_INPUT_KEY Key;
UINT8 *UserId;
CHAR16 *QuestionStr;
CHAR16 *PromptStr;
if ((This == NULL) || (User == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Get User Identifier
//
UserInfo = NULL;
Status = FindUserInfoByType (
User,
EFI_USER_INFO_IDENTIFIER_RECORD,
&UserInfo
);
if (EFI_ERROR (Status)) {
return EFI_INVALID_PARAMETER;
}
CopyMem (UsbInfo.UserId, (UINT8 *) (UserInfo + 1), sizeof (EFI_USER_INFO_IDENTIFIER));
FreePool (UserInfo);
//
// Get Token and User ID to UsbInfo.
//
Status = GetToken (UsbInfo.Token);
if (EFI_ERROR (Status)) {
QuestionStr = GetStringById (STRING_TOKEN (STR_READ_USB_TOKEN_ERROR));
PromptStr = GetStringById (STRING_TOKEN (STR_INSERT_USB_TOKEN));
CreatePopUp (
EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
&Key,
QuestionStr,
L"",
PromptStr,
NULL
);
FreePool (QuestionStr);
FreePool (PromptStr);
return Status;
}
//
// Check whether User is ever enrolled in the provider.
//
for (Index = 0; Index < mUsbTable->Count; Index++) {
UserId = (UINT8 *) &mUsbTable->UserInfo[Index].UserId;
if (CompareMem (UserId, (UINT8 *) &UsbInfo.UserId, sizeof (EFI_USER_INFO_IDENTIFIER)) == 0) {
//
// User already exists, update the password.
//
break;
}
}
//
// Enroll the User to the provider.
//
Status = ModifyTable (Index, &UsbInfo);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
/**
Returns the user interface information used during user identification.
This function returns information about the form used when interacting with the
user during user identification. The form is the first enabled form in the form-set
class EFI_HII_USER_CREDENTIAL_FORMSET_GUID installed on the HII handle HiiHandle. If
the user credential provider does not require a form to identify the user, then this
function should return EFI_NOT_FOUND.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[out] Hii On return, holds the HII database handle.
@param[out] FormSetId On return, holds the identifier of the form set which contains
the form used during user identification.
@param[out] FormId On return, holds the identifier of the form used during user
identification.
@retval EFI_SUCCESS Form returned successfully.
@retval EFI_NOT_FOUND Form not returned.
@retval EFI_INVALID_PARAMETER Hii is NULL or FormSetId is NULL or FormId is NULL.
**/
EFI_STATUS
EFIAPI
CredentialForm (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
OUT EFI_HII_HANDLE *Hii,
OUT EFI_GUID *FormSetId,
OUT EFI_FORM_ID *FormId
)
{
if ((This == NULL) || (Hii == NULL) ||
(FormSetId == NULL) || (FormId == NULL)) {
return EFI_INVALID_PARAMETER;
}
return EFI_NOT_FOUND;
}
/**
Returns bitmap used to describe the credential provider type.
This optional function returns a bitmap which is less than or equal to the number
of pixels specified by Width and Height. If no such bitmap exists, then EFI_NOT_FOUND
is returned.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[in, out] Width On entry, points to the desired bitmap width. If NULL then no
bitmap information will be returned. On exit, points to the
width of the bitmap returned.
@param[in, out] Height On entry, points to the desired bitmap height. If NULL then no
bitmap information will be returned. On exit, points to the
height of the bitmap returned.
@param[out] Hii On return, holds the HII database handle.
@param[out] Image On return, holds the HII image identifier.
@retval EFI_SUCCESS Image identifier returned successfully.
@retval EFI_NOT_FOUND Image identifier not returned.
@retval EFI_INVALID_PARAMETER Hii is NULL or Image is NULL.
**/
EFI_STATUS
EFIAPI
CredentialTile (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
IN OUT UINTN *Width,
IN OUT UINTN *Height,
OUT EFI_HII_HANDLE *Hii,
OUT EFI_IMAGE_ID *Image
)
{
if ((This == NULL) || (Hii == NULL) || (Image == NULL)) {
return EFI_INVALID_PARAMETER;
}
return EFI_NOT_FOUND;
}
/**
Returns string used to describe the credential provider type.
This function returns a string which describes the credential provider. If no
such string exists, then EFI_NOT_FOUND is returned.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[out] Hii On return, holds the HII database handle.
@param[out] String On return, holds the HII string identifier.
@retval EFI_SUCCESS String identifier returned successfully.
@retval EFI_NOT_FOUND String identifier not returned.
@retval EFI_INVALID_PARAMETER Hii is NULL or String is NULL.
**/
EFI_STATUS
EFIAPI
CredentialTitle (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
OUT EFI_HII_HANDLE *Hii,
OUT EFI_STRING_ID *String
)
{
if ((This == NULL) || (Hii == NULL) || (String == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Set Hii handle and String ID.
//
*Hii = mCallbackInfo->HiiHandle;
*String = STRING_TOKEN (STR_CREDENTIAL_TITLE);
return EFI_SUCCESS;
}
/**
Return the user identifier associated with the currently authenticated user.
This function returns the user identifier of the user authenticated by this credential
provider. This function is called after the credential-related information has been
submitted on a form OR after a call to Default() has returned that this credential is
ready to log on.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[in] User The user profile handle of the user profile currently being
considered by the user identity manager. If NULL, then no user
profile is currently under consideration.
@param[out] Identifier On return, points to the user identifier.
@retval EFI_SUCCESS User identifier returned successfully.
@retval EFI_NOT_READY No user identifier can be returned.
@retval EFI_ACCESS_DENIED The user has been locked out of this user credential.
@retval EFI_INVALID_PARAMETER This is NULL, or Identifier is NULL.
@retval EFI_NOT_FOUND User is not NULL, and the specified user handle can't be
found in user profile database.
**/
EFI_STATUS
EFIAPI
CredentialUser (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
IN EFI_USER_PROFILE_HANDLE User,
OUT EFI_USER_INFO_IDENTIFIER *Identifier
)
{
EFI_STATUS Status;
UINTN Index;
EFI_USER_INFO *UserInfo;
UINT8 *UserId;
UINT8 *NewUserId;
UINT8 *UserToken;
UINT8 ReadToken[HASHED_CREDENTIAL_LEN];
EFI_INPUT_KEY Key;
CHAR16 *QuestionStr;
CHAR16 *PromptStr;
if ((This == NULL) || (Identifier == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (User == NULL) {
//
// Verify the auto logon user, get user id by matched token.
//
if (mUsbTable->Count == 0) {
return EFI_NOT_READY;
}
//
// No user selected, get token first and verify the user existed in user database.
//
Status = GetToken (ReadToken);
if (EFI_ERROR (Status)) {
return EFI_NOT_READY;
}
for (Index = 0; Index < mUsbTable->Count; Index++) {
//
// find the specified credential in the Usb credential database.
//
UserToken = mUsbTable->UserInfo[Index].Token;
if (CompareMem (UserToken, ReadToken, HASHED_CREDENTIAL_LEN) == 0) {
UserId = (UINT8 *) &mUsbTable->UserInfo[Index].UserId;
CopyMem (Identifier, UserId, sizeof (EFI_USER_INFO_IDENTIFIER));
return EFI_SUCCESS;
}
}
return EFI_NOT_READY;
}
//
// User is not NULL here. Read a token, and check whether the token matches with
// the selected user's Token. If not, try to find a token in token DB to matches
// with read token.
//
Status = GetToken (ReadToken);
if (EFI_ERROR (Status)) {
QuestionStr = GetStringById (STRING_TOKEN (STR_READ_USB_TOKEN_ERROR));
PromptStr = GetStringById (STRING_TOKEN (STR_INSERT_USB_TOKEN));
CreatePopUp (
EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
&Key,
QuestionStr,
L"",
PromptStr,
NULL
);
FreePool (QuestionStr);
FreePool (PromptStr);
return EFI_NOT_FOUND;
}
//
// Get the selected user's identifier.
//
Status = FindUserInfoByType (User, EFI_USER_INFO_IDENTIFIER_RECORD, &UserInfo);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
//
// Check the selected user's Token with the read token.
//
for (Index = 0; Index < mUsbTable->Count; Index++) {
UserId = (UINT8 *) &mUsbTable->UserInfo[Index].UserId;
NewUserId = (UINT8 *) (UserInfo + 1);
if (CompareMem (UserId, NewUserId, sizeof (EFI_USER_INFO_IDENTIFIER)) == 0) {
//
// The user's ID is found in the UsbTable.
//
UserToken = mUsbTable->UserInfo[Index].Token;
if (CompareMem (UserToken, ReadToken, HASHED_CREDENTIAL_LEN) == 0) {
//
// The read token matches with the one in UsbTable.
//
CopyMem (Identifier, UserId, sizeof (EFI_USER_INFO_IDENTIFIER));
FreePool (UserInfo);
return EFI_SUCCESS;
}
}
}
FreePool (UserInfo);
return EFI_NOT_READY;
}
/**
Indicate that user interface interaction has begun for the specified credential.
This function is called when a credential provider is selected by the user. If
AutoLogon returns FALSE, then the user interface will be constructed by the User
Identity Manager.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[out] AutoLogon On return, points to the credential provider's capabilities
after the credential provider has been selected by the user.
@retval EFI_SUCCESS Credential provider successfully selected.
@retval EFI_INVALID_PARAMETER AutoLogon is NULL.
**/
EFI_STATUS
EFIAPI
CredentialSelect (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
OUT EFI_CREDENTIAL_LOGON_FLAGS *AutoLogon
)
{
if ((This == NULL) || (AutoLogon == NULL)) {
return EFI_INVALID_PARAMETER;
}
*AutoLogon = EFI_CREDENTIAL_LOGON_FLAG_DEFAULT | EFI_CREDENTIAL_LOGON_FLAG_AUTO;
return EFI_SUCCESS;
}
/**
Indicate that user interface interaction has ended for the specified credential.
This function is called when a credential provider is deselected by the user.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@retval EFI_SUCCESS Credential provider successfully deselected.
**/
EFI_STATUS
EFIAPI
CredentialDeselect (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This
)
{
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
Return the default logon behavior for this user credential.
This function reports the default login behavior regarding this credential provider.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[out] AutoLogon On return, holds whether the credential provider should be used
by default to automatically log on the user.
@retval EFI_SUCCESS Default information successfully returned.
@retval EFI_INVALID_PARAMETER AutoLogon is NULL.
**/
EFI_STATUS
EFIAPI
CredentialDefault (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
OUT EFI_CREDENTIAL_LOGON_FLAGS *AutoLogon
)
{
if ((This == NULL) || (AutoLogon == NULL)) {
return EFI_INVALID_PARAMETER;
}
*AutoLogon = EFI_CREDENTIAL_LOGON_FLAG_DEFAULT | EFI_CREDENTIAL_LOGON_FLAG_AUTO;
return EFI_SUCCESS;
}
/**
Return information attached to the credential provider.
This function returns user information.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[in] UserInfo Handle of the user information data record.
@param[out] Info On entry, points to a buffer of at least *InfoSize bytes. On
exit, holds the user information. If the buffer is too small
to hold the information, then EFI_BUFFER_TOO_SMALL is returned
and InfoSize is updated to contain the number of bytes actually
required.
@param[in, out] InfoSize On entry, points to the size of Info. On return, points to the
size of the user information.
@retval EFI_SUCCESS Information returned successfully.
@retval EFI_BUFFER_TOO_SMALL The size specified by InfoSize is too small to hold all of the
user information. The size required is returned in *InfoSize.
@retval EFI_INVALID_PARAMETER Info is NULL or InfoSize is NULL.
@retval EFI_NOT_FOUND The specified UserInfo does not refer to a valid user info handle.
**/
EFI_STATUS
EFIAPI
CredentialGetInfo (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
IN EFI_USER_INFO_HANDLE UserInfo,
OUT EFI_USER_INFO *Info,
IN OUT UINTN *InfoSize
)
{
EFI_USER_INFO *CredentialInfo;
UINTN Index;
if ((This == NULL) || (InfoSize == NULL) || (Info == NULL)) {
return EFI_INVALID_PARAMETER;
}
if ((UserInfo == NULL) || (mUsbInfoHandle == NULL)) {
return EFI_NOT_FOUND;
}
//
// Find information handle in credential info table.
//
for (Index = 0; Index < mUsbInfoHandle->Count; Index++) {
CredentialInfo = mUsbInfoHandle->Info[Index];
if (UserInfo == (EFI_USER_INFO_HANDLE)CredentialInfo) {
//
// The handle is found, copy the user info.
//
if (CredentialInfo->InfoSize > *InfoSize) {
*InfoSize = CredentialInfo->InfoSize;
return EFI_BUFFER_TOO_SMALL;
}
CopyMem (Info, CredentialInfo, CredentialInfo->InfoSize);
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Enumerate all of the user informations on the credential provider.
This function returns the next user information record. To retrieve the first user
information record handle, point UserInfo at a NULL. Each subsequent call will retrieve
another user information record handle until there are no more, at which point UserInfo
will point to NULL.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[in, out] UserInfo On entry, points to the previous user information handle or NULL
to start enumeration. On exit, points to the next user information
handle or NULL if there is no more user information.
@retval EFI_SUCCESS User information returned.
@retval EFI_NOT_FOUND No more user information found.
@retval EFI_INVALID_PARAMETER UserInfo is NULL.
**/
EFI_STATUS
EFIAPI
CredentialGetNextInfo (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
IN OUT EFI_USER_INFO_HANDLE *UserInfo
)
{
EFI_USER_INFO *Info;
CHAR16 *ProvNameStr;
UINTN InfoLen;
UINTN Index;
UINTN ProvStrLen;
if ((This == NULL) || (UserInfo == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (mUsbInfoHandle == NULL) {
//
// Initilized user info table. There are 4 user info records in the table.
//
InfoLen = sizeof (USB_CREDENTIAL_INFO) + (4 - 1) * sizeof (EFI_USER_INFO *);
mUsbInfoHandle = AllocateZeroPool (InfoLen);
if (mUsbInfoHandle == NULL) {
*UserInfo = NULL;
return EFI_NOT_FOUND;
}
//
// The first information, Credential Provider info.
//
InfoLen = sizeof (EFI_USER_INFO) + sizeof (EFI_GUID);
Info = AllocateZeroPool (InfoLen);
ASSERT (Info != NULL);
Info->InfoType = EFI_USER_INFO_CREDENTIAL_PROVIDER_RECORD;
Info->InfoSize = (UINT32) InfoLen;
Info->InfoAttribs = EFI_USER_INFO_PROTECTED;
CopyGuid (&Info->Credential, &gUsbCredentialProviderGuid);
CopyGuid ((EFI_GUID *)(Info + 1), &gUsbCredentialProviderGuid);
mUsbInfoHandle->Info[0] = Info;
mUsbInfoHandle->Count++;
//
// The second information, Credential Provider name info.
//
ProvNameStr = GetStringById (STRING_TOKEN (STR_PROVIDER_NAME));
ProvStrLen = StrSize (ProvNameStr);
InfoLen = sizeof (EFI_USER_INFO) + ProvStrLen;
Info = AllocateZeroPool (InfoLen);
ASSERT (Info != NULL);
Info->InfoType = EFI_USER_INFO_CREDENTIAL_PROVIDER_NAME_RECORD;
Info->InfoSize = (UINT32) InfoLen;
Info->InfoAttribs = EFI_USER_INFO_PROTECTED;
CopyGuid (&Info->Credential, &gUsbCredentialProviderGuid);
CopyMem ((UINT8*)(Info + 1), ProvNameStr, ProvStrLen);
FreePool (ProvNameStr);
mUsbInfoHandle->Info[1] = Info;
mUsbInfoHandle->Count++;
//
// The third information, Credential Provider type info.
//
InfoLen = sizeof (EFI_USER_INFO) + sizeof (EFI_GUID);
Info = AllocateZeroPool (InfoLen);
ASSERT (Info != NULL);
Info->InfoType = EFI_USER_INFO_CREDENTIAL_TYPE_RECORD;
Info->InfoSize = (UINT32) InfoLen;
Info->InfoAttribs = EFI_USER_INFO_PROTECTED;
CopyGuid (&Info->Credential, &gUsbCredentialProviderGuid);
CopyGuid ((EFI_GUID *)(Info + 1), &gEfiUserCredentialClassSecureCardGuid);
mUsbInfoHandle->Info[2] = Info;
mUsbInfoHandle->Count++;
//
// The fourth information, Credential Provider type name info.
//
ProvNameStr = GetStringById (STRING_TOKEN (STR_PROVIDER_TYPE_NAME));
ProvStrLen = StrSize (ProvNameStr);
InfoLen = sizeof (EFI_USER_INFO) + ProvStrLen;
Info = AllocateZeroPool (InfoLen);
ASSERT (Info != NULL);
Info->InfoType = EFI_USER_INFO_CREDENTIAL_PROVIDER_NAME_RECORD;
Info->InfoSize = (UINT32) InfoLen;
Info->InfoAttribs = EFI_USER_INFO_PROTECTED;
CopyGuid (&Info->Credential, &gUsbCredentialProviderGuid);
CopyMem ((UINT8*)(Info + 1), ProvNameStr, ProvStrLen);
FreePool (ProvNameStr);
mUsbInfoHandle->Info[3] = Info;
mUsbInfoHandle->Count++;
}
if (*UserInfo == NULL) {
//
// Return the first info handle.
//
*UserInfo = (EFI_USER_INFO_HANDLE) mUsbInfoHandle->Info[0];
return EFI_SUCCESS;
}
//
// Find information handle in credential info table.
//
for (Index = 0; Index < mUsbInfoHandle->Count; Index++) {
Info = mUsbInfoHandle->Info[Index];
if (*UserInfo == (EFI_USER_INFO_HANDLE)Info) {
//
// The handle is found, get the next one.
//
if (Index == mUsbInfoHandle->Count - 1) {
//
// Already last one.
//
*UserInfo = NULL;
return EFI_NOT_FOUND;
}
Index++;
*UserInfo = (EFI_USER_INFO_HANDLE)mUsbInfoHandle->Info[Index];
return EFI_SUCCESS;
}
}
*UserInfo = NULL;
return EFI_NOT_FOUND;
}
/**
Delete a user on this credential provider.
This function deletes a user on this credential provider.
@param[in] This Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
@param[in] User The user profile handle to delete.
@retval EFI_SUCCESS User profile was successfully deleted.
@retval EFI_ACCESS_DENIED Current user profile does not permit deletion on the user profile handle.
Either the user profile cannot delete on any user profile or cannot delete
on a user profile other than the current user profile.
@retval EFI_UNSUPPORTED This credential provider does not support deletion in the pre-OS.
@retval EFI_DEVICE_ERROR The new credential could not be deleted because of a device error.
@retval EFI_INVALID_PARAMETER User does not refer to a valid user profile handle.
**/
EFI_STATUS
EFIAPI
CredentialDelete (
IN CONST EFI_USER_CREDENTIAL2_PROTOCOL *This,
IN EFI_USER_PROFILE_HANDLE User
)
{
EFI_STATUS Status;
EFI_USER_INFO *UserInfo;
UINT8 *UserId;
UINT8 *NewUserId;
UINTN Index;
if ((This == NULL) || (User == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Get User Identifier.
//
UserInfo = NULL;
Status = FindUserInfoByType (
User,
EFI_USER_INFO_IDENTIFIER_RECORD,
&UserInfo
);
if (EFI_ERROR (Status)) {
return EFI_INVALID_PARAMETER;
}
//
// Find the user by user identifier in mPwdTable.
//
for (Index = 0; Index < mUsbTable->Count; Index++) {
UserId = (UINT8 *) &mUsbTable->UserInfo[Index].UserId;
NewUserId = (UINT8 *) (UserInfo + 1);
if (CompareMem (UserId, NewUserId, sizeof (EFI_USER_INFO_IDENTIFIER)) == 0) {
//
// Found the user, delete it.
//
ModifyTable (Index, NULL);
break;
}
}
FreePool (UserInfo);
return EFI_SUCCESS;
}
/**
Main entry for this driver.
@param ImageHandle Image handle this driver.
@param SystemTable Pointer to SystemTable.
@retval EFI_SUCESS This function always complete successfully.
**/
EFI_STATUS
EFIAPI
UsbProviderInit (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Init credential table.
//
Status = InitCredentialTable ();
if (EFI_ERROR (Status)) {
return Status;
}
//
// Init Form Browser
//
Status = InitFormBrowser ();
if (EFI_ERROR (Status)) {
return Status;
}
//
// Install protocol interfaces for the Usb Credential Provider.
//
Status = gBS->InstallProtocolInterface (
&mCallbackInfo->DriverHandle,
&gEfiUserCredential2ProtocolGuid,
EFI_NATIVE_INTERFACE,
&gUsbCredentialProviderDriver
);
return Status;
}