/** @file
The UEFI Inline Cryptographic Interface protocol provides services to abstract
access to inline cryptographic capabilities.
Copyright (c) 2015, 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.
**/
#ifndef __BLOCK_IO_CRYPTO_H__
#define __BLOCK_IO_CRYPTO_H__
#include <Protocol/BlockIo.h>
#define EFI_BLOCK_IO_CRYPTO_PROTOCOL_GUID \
{ \
0xa00490ba, 0x3f1a, 0x4b4c, {0xab, 0x90, 0x4f, 0xa9, 0x97, 0x26, 0xa1, 0xe8} \
}
typedef struct _EFI_BLOCK_IO_CRYPTO_PROTOCOL EFI_BLOCK_IO_CRYPTO_PROTOCOL;
///
/// The struct of Block I/O Crypto Token.
///
typedef struct {
//
// If Event is NULL, then blocking I/O is performed. If Event is not NULL and
// non-blocking I/O is supported, then non-blocking I/O is performed, and
// Event will be signaled when the read request is completed and data was
// decrypted (when Index was specified).
//
EFI_EVENT Event;
//
// Defines whether or not the signaled event encountered an error.
//
EFI_STATUS TransactionStatus;
} EFI_BLOCK_IO_CRYPTO_TOKEN;
typedef struct {
//
// GUID of the algorithm.
//
EFI_GUID Algorithm;
//
// Specifies KeySizein bits used with this Algorithm.
//
UINT64 KeySize;
//
// Specifies bitmask of block sizes supported by this algorithm.
// Bit j being set means that 2^j bytes crypto block size is supported.
//
UINT64 CryptoBlockSizeBitMask;
} EFI_BLOCK_IO_CRYPTO_CAPABILITY;
///
/// EFI_BLOCK_IO_CRYPTO_IV_INPUT structure is used as a common header in CryptoIvInput
/// parameters passed to the ReadExtended and WriteExtended methods for Inline
/// Cryptographic Interface.
/// Its purpose is to pass size of the entire CryptoIvInputparameter memory buffer to
/// the Inline Cryptographic Interface.
///
typedef struct {
UINT64 InputSize;
} EFI_BLOCK_IO_CRYPTO_IV_INPUT;
#define EFI_BLOCK_IO_CRYPTO_ALGO_GUID_AES_XTS \
{ \
0x2f87ba6a, 0x5c04, 0x4385, {0xa7, 0x80, 0xf3, 0xbf, 0x78, 0xa9, 0x7b, 0xec} \
}
extern EFI_GUID gEfiBlockIoCryptoAlgoAesXtsGuid;
typedef struct {
EFI_BLOCK_IO_CRYPTO_IV_INPUT Header;
UINT64 CryptoBlockNumber;
UINT64 CryptoBlockByteSize;
} EFI_BLOCK_IO_CRYPTO_IV_INPUT_AES_XTS;
#define EFI_BLOCK_IO_CRYPTO_ALGO_GUID_AES_CBC_MICROSOFT_BITLOCKER \
{ \
0x689e4c62, 0x70bf, 0x4cf3, {0x88, 0xbb, 0x33, 0xb3, 0x18, 0x26, 0x86, 0x70} \
}
extern EFI_GUID gEfiBlockIoCryptoAlgoAesCbcMsBitlockerGuid;
typedef struct {
EFI_BLOCK_IO_CRYPTO_IV_INPUT Header;
UINT64 CryptoBlockByteOffset;
UINT64 CryptoBlockByteSize;
} EFI_BLOCK_IO_CRYPTO_IV_INPUT_AES_CBC_MICROSOFT_BITLOCKER;
#define EFI_BLOCK_IO_CRYPTO_INDEX_ANY 0xFFFFFFFFFFFFFFFF
typedef struct {
//
// Is inline cryptographic capability supported on this device.
//
BOOLEAN Supported;
//
// Maximum number of keys that can be configured at the same time.
//
UINT64 KeyCount;
//
// Number of supported capabilities.
//
UINT64 CapabilityCount;
//
// Array of supported capabilities.
//
EFI_BLOCK_IO_CRYPTO_CAPABILITY Capabilities[1];
} EFI_BLOCK_IO_CRYPTO_CAPABILITIES;
typedef struct {
//
// Configuration table index. A special Index EFI_BLOCK_IO_CRYPTO_INDEX_ANY can be
// used to set any available entry in the configuration table.
//
UINT64 Index;
//
// Identifies the owner of the configuration table entry. Entry can also be used
// with the Nil value to clear key from the configuration table index.
//
EFI_GUID KeyOwnerGuid;
//
// A supported capability to be used. The CryptoBlockSizeBitMask field of the
// structure should have only one bit set from the supported mask.
//
EFI_BLOCK_IO_CRYPTO_CAPABILITY Capability;
//
// Pointer to the key. The size of the key is defined by the KeySize field of
// the capability specified by the Capability parameter.
//
VOID *CryptoKey;
} EFI_BLOCK_IO_CRYPTO_CONFIGURATION_TABLE_ENTRY;
typedef struct {
//
// Configuration table index.
//
UINT64 Index;
//
// Identifies the current owner of the entry.
//
EFI_GUID KeyOwnerGuid;
//
// The capability to be used. The CryptoBlockSizeBitMask field of the structure
// has only one bit set from the supported mask.
//
EFI_BLOCK_IO_CRYPTO_CAPABILITY Capability;
} EFI_BLOCK_IO_CRYPTO_RESPONSE_CONFIGURATION_ENTRY;
/**
Reset the block device hardware.
The Reset() function resets the block device hardware.
As part of the initialization process, the firmware/device will make a quick but
reasonable attempt to verify that the device is functioning.
If the ExtendedVerificationflag is TRUE the firmware may take an extended amount
of time to verify the device is operating on reset. Otherwise the reset operation
is to occur as quickly as possible.
The hardware verification process is not defined by this specification and is left
up to the platform firmware or driver to implement.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[in] ExtendedVerification Indicates that the driver may perform a more exhausive
verfication operation of the device during reset.
@retval EFI_SUCCESS The block device was reset.
@retval EFI_DEVICE_ERROR The block device is not functioning correctly and could
not be reset.
@retval EFI_INVALID_PARAMETER This is NULL.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_RESET) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
);
/**
Get the capabilities of the underlying inline cryptographic interface.
The GetCapabilities() function determines whether pre-OS controllable inline crypto
is supported by the system for the current disk and, if so, returns the capabilities
of the crypto engine.
The caller is responsible for providing the Capabilities structure with a sufficient
number of entries.
If the structure is too small, the EFI_BUFFER_TOO_SMALL error code is returned and the
CapabilityCount field contains the number of entries needed to contain the capabilities.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[out] Capabilities Pointer to the EFI_BLOCK_IO_CRYPTO_CAPABILITIES structure.
@retval EFI_SUCCESS The ICI is ready for use.
@retval EFI_BUFFER_TOO_SMALL The Capabilities structure was too small. The number of
entries needed is returned in the CapabilityCount field
of the structure.
@retval EFI_NO_RESPONSE No response was received from the ICI.
@retval EFI_DEVICE_ERROR An error occurred when attempting to access the ICI.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_INVALID_PARAMETER Capabilities is NULL.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_GET_CAPABILITIES) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
OUT EFI_BLOCK_IO_CRYPTO_CAPABILITIES *Capabilities
);
/**
Set the configuration of the underlying inline cryptographic interface.
The SetConfiguration() function allows the user to set the current configuration of the
inline cryptographic interface and should be called before attempting any crypto operations.
This configures the configuration table entries with algorithms, key sizes and keys. Each
configured entry can later be referred to by index at the time of storage transaction.
The configuration table index will refer to the combination ofKeyOwnerGuid, Algorithm, and
CryptoKey.
KeyOwnerGuid identifies the component taking ownership of the entry. It helps components to
identify their own entries, cooperate with other owner components, and avoid conflicts. This
Guid identifier is there to help coordination between cooperating components and not a security
or synchronization feature. The Nil GUID can be used by a component to release use of entry
owned. It is also used to identify potentially available entries (see GetConfiguration).
CryptoKey specifies algorithm-specific key material to use within parameters of selected crypto
capability.
This function is called infrequently typically once, on device start, before IO starts. It
can be called at later times in cases the number of keysused on the drive is higher than what
can be configured at a time or a new key has to be added.
Components setting or changing an entry or entries for a given index or indices must ensure
that IO referencing affected indices is temporarily blocked (run-down) at the time of change.
Indices parameters in each parameter table entry allow to set only a portion of the available
table entries in the crypto module anywhere from single entry to entire table supported.
If corresponding table entry or entries being set are already in use by another owner the call
should be failed and none of the entries should be modified. The interface implementation must
enforce atomicity of this operation (should either succeed fully or fail completely without
modifying state).
Note that components using GetConfiguration command to discover available entries should be
prepared that by the time of calling SetConfiguration the previously available entry may have
become occupied. Such components should be prepared to re-try the sequence of operations.
Alternatively EFI_BLOCK_IO_CRYPTO_INDEX_ANY can be used to have the implementation discover
and allocate available,if any, indices atomically.
An optional ResultingTable pointer can be provided by the caller to receive the newly configured
entries. The array provided by the caller must have at least ConfigurationCount of entries.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[in] ConfigurationCount Number of entries being configured with this call.
@param[in] ConfigurationTable Pointer to a table used to populate the configuration table.
@param[out] ResultingTable Optional pointer to a table that receives the newly configured
entries.
@retval EFI_SUCCESS The ICI is ready for use.
@retval EFI_NO_RESPONSE No response was received from the ICI.
@retval EFI_DEVICE_ERROR An error occurred when attempting to access the ICI.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_INVALID_PARAMETER ConfigurationTable is NULL.
@retval EFI_INVALID_PARAMETER ConfigurationCount is 0.
@retval EFI_OUT_OF_RESOURCES Could not find the requested number of available entries in the
configuration table.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_SET_CONFIGURATION) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
IN UINT64 ConfigurationCount,
IN EFI_BLOCK_IO_CRYPTO_CONFIGURATION_TABLE_ENTRY *ConfigurationTable,
OUT EFI_BLOCK_IO_CRYPTO_RESPONSE_CONFIGURATION_ENTRY *ResultingTable OPTIONAL
);
/**
Get the configuration of the underlying inline cryptographic interface.
The GetConfiguration() function allows the user to get the configuration of the inline
cryptographic interface.
Retrieves, entirely or partially, the currently configured key table. Note that the keys
themselves are not retrieved, but rather just indices, owner GUIDs and capabilities.
If fewer entries than specified by ConfigurationCount are returned, the Index field of the
unused entries is set to EFI_BLOCK_IO_CRYPTO_INDEX_ANY.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[in] StartIndex Configuration table index at which to start the configuration
query.
@param[in] ConfigurationCount Number of entries to return in the response table.
@param[in] KeyOwnerGuid Optional parameter to filter response down to entries with a
given owner. A pointer to the Nil value can be used to return
available entries. Set to NULL when no owner filtering is required.
@param[out] ConfigurationTable Table of configured configuration table entries (with no CryptoKey
returned): configuration table index, KeyOwnerGuid, Capability.
Should have sufficient space to store up to ConfigurationCount
entries.
@retval EFI_SUCCESS The ICI is ready for use.
@retval EFI_NO_RESPONSE No response was received from the ICI.
@retval EFI_DEVICE_ERROR An error occurred when attempting to access the ICI.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_INVALID_PARAMETER Configuration table is NULL.
@retval EFI_INVALID_PARAMETER StartIndex is out of bounds.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_GET_CONFIGURATION) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
IN UINT64 StartIndex,
IN UINT64 ConfigurationCount,
IN EFI_GUID *KeyOwnerGuid OPTIONAL,
OUT EFI_BLOCK_IO_CRYPTO_RESPONSE_CONFIGURATION_ENTRY *ConfigurationTable
);
/**
Reads the requested number of blocks from the device and optionally decrypts
them inline.
TheReadExtended() function allows the caller to perform a storage device read
operation. The function reads the requested number of blocks from the device
and then if Index is specified decrypts them inline. All the blocks are read
and decrypted (if decryption requested), or an error is returned.
If there is no media in the device, the function returns EFI_NO_MEDIA. If the
MediaId is not the ID for the current media in the device, the function returns
EFI_MEDIA_CHANGED.
If EFI_DEVICE_ERROR, EFI_NO_MEDIA, or EFI_MEDIA_CHANGED is returned and nonblocking
I/O is being used, the Event associated with this request will not be signaled.
In addition to standard storage transaction parameters (LBA, IO size, and buffer),
this command will also specify a configuration table Index and CryptoIvInput
when data has to be decrypted inline by the controller after being read from
the storage device. If an Index parameter is not specified, no decryption is
performed.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[in] MediaId The media ID that the read request is for.
@param[in] LBA The starting logical block address to read from on
the device.
@param[in, out] Token A pointer to the token associated with the transaction.
@param[in] BufferSize The size of the Buffer in bytes. This must be a multiple
of the intrinsic block size of the device.
@param[out] Buffer A pointer to the destination buffer for the data. The
caller is responsible for either having implicit or
explicit ownership of the buffer.
@param[in] Index A pointer to the configuration table index. This is
optional.
@param[in] CryptoIvInput A pointer to a buffer that contains additional
cryptographic parameters as required by the capability
referenced by the configuration table index, such as
cryptographic initialization vector.
@retval EFI_SUCCESS The read request was queued if Token-> Event is not NULL.
The data was read correctly from the device if the
Token->Event is NULL.
@retval EFI_DEVICE_ERROR The device reported an error while attempting to perform
the read operation and/or decryption operation.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the intrinsic
block size of the device.
@retval EFI_INVALID_PARAMETER This is NULL, or the read request contains LBAs that are
not valid, or the buffer is not on proper alignment.
@retval EFI_INVALID_PARAMETER CryptoIvInput is incorrect.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of
resources.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_READ_EXTENDED) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA LBA,
IN OUT EFI_BLOCK_IO_CRYPTO_TOKEN *Token,
IN UINT64 BufferSize,
OUT VOID *Buffer,
IN UINT64 *Index OPTIONAL,
IN VOID *CryptoIvInput OPTIONAL
);
/**
Optionally encrypts a specified number of blocks inline and then writes to the
device.
The WriteExtended() function allows the caller to perform a storage device write
operation. The function encrypts the requested number of blocks inline if Index
is specified and then writes them to the device. All the blocks are encrypted
(if encryption requested) and written, or an error is returned.
If there is no media in the device, the function returns EFI_NO_MEDIA. If the
MediaId is not the ID for the current media in the device, the function returns
EFI_MEDIA_CHANGED.
If EFI_DEVICE_ERROR, EFI_NO_MEDIA, or EFI_MEDIA_CHANGED is returned and nonblocking
I/O is being used, the Event associated with this request will not be signaled.
In addition to standard storage transaction parameters (LBA, IO size, and buffer),
this command will also specify a configuration table Index and a CryptoIvInput
when data has to be decrypted inline by the controller before being written to
the storage device. If no Index parameter is specified, no encryption is performed.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[in] MediaId The media ID that the read request is for.
@param[in] LBA The starting logical block address to read from on
the device.
@param[in, out] Token A pointer to the token associated with the transaction.
@param[in] BufferSize The size of the Buffer in bytes. This must be a multiple
of the intrinsic block size of the device.
@param[in] Buffer A pointer to the source buffer for the data.
@param[in] Index A pointer to the configuration table index. This is
optional.
@param[in] CryptoIvInput A pointer to a buffer that contains additional
cryptographic parameters as required by the capability
referenced by the configuration table index, such as
cryptographic initialization vector.
@retval EFI_SUCCESS The request to encrypt (optionally) and write was queued
if Event is not NULL. The data was encrypted (optionally)
and written correctly to the device if the Event is NULL.
@retval EFI_WRITE_PROTECTED The device cannot be written to.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
@retval EFI_DEVICE_ERROR The device reported an error while attempting to encrypt
blocks or to perform the write operation.
@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the intrinsic
block size of the device.
@retval EFI_INVALID_PARAMETER This is NULL, or the write request contains LBAs that are
not valid, or the buffer is not on proper alignment.
@retval EFI_INVALID_PARAMETER CryptoIvInput is incorrect.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of
resources.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_WRITE_EXTENDED) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA LBA,
IN OUT EFI_BLOCK_IO_CRYPTO_TOKEN *Token,
IN UINT64 BufferSize,
IN VOID *Buffer,
IN UINT64 *Index OPTIONAL,
IN VOID *CryptoIvInput OPTIONAL
);
/**
Flushes all modified data toa physical block device.
The FlushBlocks() function flushes all modified data to the physical block device.
Any modified data that has to be encrypted must have been already encrypted as a
part of WriteExtended() operation - inline crypto operation cannot be a part of
flush operation.
All data written to the device prior to the flush must be physically written before
returning EFI_SUCCESS from this function. This would include any cached data the
driver may have cached, and cached data the device may have cached. A flush may
cause a read request following the flush to force a device access.
If EFI_DEVICE_ERROR, EFI_NO_MEDIA, EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is
returned and non-blocking I/O is being used, the Event associated with this request
will not be signaled.
@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
@param[in, out] Token A pointer to the token associated with the transaction.
@retval EFI_SUCCESS The flush request was queued if Event is not NULL. All
outstanding data was written correctly to the device if
the Event is NULL.
@retval EFI_DEVICE_ERROR The device reported an error while attempting to write data.
@retval EFI_WRITE_PROTECTED The device cannot be written to.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of
resources.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BLOCK_IO_CRYPTO_FLUSH) (
IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
IN OUT EFI_BLOCK_IO_CRYPTO_TOKEN *Token
);
///
/// The EFI_BLOCK_IO_CRYPTO_PROTOCOL defines a UEFI protocol that can be used by UEFI
/// drivers and applications to perform block encryption on a storage device, such as UFS.
///
struct _EFI_BLOCK_IO_CRYPTO_PROTOCOL {
EFI_BLOCK_IO_MEDIA *Media;
EFI_BLOCK_IO_CRYPTO_RESET Reset;
EFI_BLOCK_IO_CRYPTO_GET_CAPABILITIES GetCapabilities;
EFI_BLOCK_IO_CRYPTO_SET_CONFIGURATION SetConfiguration;
EFI_BLOCK_IO_CRYPTO_GET_CONFIGURATION GetConfiguration;
EFI_BLOCK_IO_CRYPTO_READ_EXTENDED ReadExtended;
EFI_BLOCK_IO_CRYPTO_WRITE_EXTENDED WriteExtended;
EFI_BLOCK_IO_CRYPTO_FLUSH FlushBlocks;
};
extern EFI_GUID gEfiBlockIoCryptoProtocolGuid;
#endif