mirror of
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525 lines
24 KiB
C
525 lines
24 KiB
C
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/** @file
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The UEFI Inline Cryptographic Interface protocol provides services to abstract
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access to inline cryptographic capabilities.
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Copyright (c) 2015-2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This Protocol was introduced in UEFI Specification 2.5.
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**/
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#ifndef __BLOCK_IO_CRYPTO_H__
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#define __BLOCK_IO_CRYPTO_H__
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#include <Protocol/BlockIo.h>
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#define EFI_BLOCK_IO_CRYPTO_PROTOCOL_GUID \
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{ \
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0xa00490ba, 0x3f1a, 0x4b4c, {0xab, 0x90, 0x4f, 0xa9, 0x97, 0x26, 0xa1, 0xe8} \
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}
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typedef struct _EFI_BLOCK_IO_CRYPTO_PROTOCOL EFI_BLOCK_IO_CRYPTO_PROTOCOL;
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///
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/// The struct of Block I/O Crypto Token.
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///
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typedef struct {
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//
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// If Event is NULL, then blocking I/O is performed. If Event is not NULL and
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// non-blocking I/O is supported, then non-blocking I/O is performed, and
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// Event will be signaled when the read request is completed and data was
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// decrypted (when Index was specified).
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//
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EFI_EVENT Event;
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//
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// Defines whether or not the signaled event encountered an error.
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//
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EFI_STATUS TransactionStatus;
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} EFI_BLOCK_IO_CRYPTO_TOKEN;
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typedef struct {
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//
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// GUID of the algorithm.
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//
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EFI_GUID Algorithm;
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//
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// Specifies KeySizein bits used with this Algorithm.
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//
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UINT64 KeySize;
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//
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// Specifies bitmask of block sizes supported by this algorithm.
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// Bit j being set means that 2^j bytes crypto block size is supported.
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//
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UINT64 CryptoBlockSizeBitMask;
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} EFI_BLOCK_IO_CRYPTO_CAPABILITY;
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///
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/// EFI_BLOCK_IO_CRYPTO_IV_INPUT structure is used as a common header in CryptoIvInput
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/// parameters passed to the ReadExtended and WriteExtended methods for Inline
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/// Cryptographic Interface.
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/// Its purpose is to pass size of the entire CryptoIvInputparameter memory buffer to
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/// the Inline Cryptographic Interface.
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///
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typedef struct {
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UINT64 InputSize;
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} EFI_BLOCK_IO_CRYPTO_IV_INPUT;
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#define EFI_BLOCK_IO_CRYPTO_ALGO_GUID_AES_XTS \
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{ \
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0x2f87ba6a, 0x5c04, 0x4385, {0xa7, 0x80, 0xf3, 0xbf, 0x78, 0xa9, 0x7b, 0xec} \
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}
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extern EFI_GUID gEfiBlockIoCryptoAlgoAesXtsGuid;
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typedef struct {
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EFI_BLOCK_IO_CRYPTO_IV_INPUT Header;
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UINT64 CryptoBlockNumber;
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UINT64 CryptoBlockByteSize;
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} EFI_BLOCK_IO_CRYPTO_IV_INPUT_AES_XTS;
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#define EFI_BLOCK_IO_CRYPTO_ALGO_GUID_AES_CBC_MICROSOFT_BITLOCKER \
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{ \
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0x689e4c62, 0x70bf, 0x4cf3, {0x88, 0xbb, 0x33, 0xb3, 0x18, 0x26, 0x86, 0x70} \
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}
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extern EFI_GUID gEfiBlockIoCryptoAlgoAesCbcMsBitlockerGuid;
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typedef struct {
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EFI_BLOCK_IO_CRYPTO_IV_INPUT Header;
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UINT64 CryptoBlockByteOffset;
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UINT64 CryptoBlockByteSize;
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} EFI_BLOCK_IO_CRYPTO_IV_INPUT_AES_CBC_MICROSOFT_BITLOCKER;
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#define EFI_BLOCK_IO_CRYPTO_INDEX_ANY 0xFFFFFFFFFFFFFFFF
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typedef struct {
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//
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// Is inline cryptographic capability supported on this device.
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//
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BOOLEAN Supported;
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//
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// Maximum number of keys that can be configured at the same time.
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//
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UINT64 KeyCount;
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//
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// Number of supported capabilities.
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//
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UINT64 CapabilityCount;
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//
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// Array of supported capabilities.
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//
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EFI_BLOCK_IO_CRYPTO_CAPABILITY Capabilities[1];
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} EFI_BLOCK_IO_CRYPTO_CAPABILITIES;
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typedef struct {
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//
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// Configuration table index. A special Index EFI_BLOCK_IO_CRYPTO_INDEX_ANY can be
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// used to set any available entry in the configuration table.
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//
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UINT64 Index;
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//
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// Identifies the owner of the configuration table entry. Entry can also be used
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// with the Nil value to clear key from the configuration table index.
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//
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EFI_GUID KeyOwnerGuid;
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//
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// A supported capability to be used. The CryptoBlockSizeBitMask field of the
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// structure should have only one bit set from the supported mask.
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//
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EFI_BLOCK_IO_CRYPTO_CAPABILITY Capability;
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//
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// Pointer to the key. The size of the key is defined by the KeySize field of
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// the capability specified by the Capability parameter.
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//
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VOID *CryptoKey;
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} EFI_BLOCK_IO_CRYPTO_CONFIGURATION_TABLE_ENTRY;
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typedef struct {
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//
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// Configuration table index.
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//
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UINT64 Index;
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//
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// Identifies the current owner of the entry.
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//
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EFI_GUID KeyOwnerGuid;
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//
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// The capability to be used. The CryptoBlockSizeBitMask field of the structure
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// has only one bit set from the supported mask.
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//
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EFI_BLOCK_IO_CRYPTO_CAPABILITY Capability;
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} EFI_BLOCK_IO_CRYPTO_RESPONSE_CONFIGURATION_ENTRY;
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/**
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Reset the block device hardware.
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The Reset() function resets the block device hardware.
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As part of the initialization process, the firmware/device will make a quick but
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reasonable attempt to verify that the device is functioning.
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If the ExtendedVerificationflag is TRUE the firmware may take an extended amount
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of time to verify the device is operating on reset. Otherwise the reset operation
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is to occur as quickly as possible.
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The hardware verification process is not defined by this specification and is left
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up to the platform firmware or driver to implement.
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@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
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@param[in] ExtendedVerification Indicates that the driver may perform a more exhausive
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verification operation of the device during reset.
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@retval EFI_SUCCESS The block device was reset.
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@retval EFI_DEVICE_ERROR The block device is not functioning correctly and could
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not be reset.
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@retval EFI_INVALID_PARAMETER This is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_IO_CRYPTO_RESET) (
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IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
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IN BOOLEAN ExtendedVerification
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);
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/**
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Get the capabilities of the underlying inline cryptographic interface.
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The GetCapabilities() function determines whether pre-OS controllable inline crypto
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is supported by the system for the current disk and, if so, returns the capabilities
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of the crypto engine.
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The caller is responsible for providing the Capabilities structure with a sufficient
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number of entries.
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If the structure is too small, the EFI_BUFFER_TOO_SMALL error code is returned and the
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CapabilityCount field contains the number of entries needed to contain the capabilities.
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@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
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@param[out] Capabilities Pointer to the EFI_BLOCK_IO_CRYPTO_CAPABILITIES structure.
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@retval EFI_SUCCESS The ICI is ready for use.
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@retval EFI_BUFFER_TOO_SMALL The Capabilities structure was too small. The number of
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entries needed is returned in the CapabilityCount field
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of the structure.
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@retval EFI_NO_RESPONSE No response was received from the ICI.
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@retval EFI_DEVICE_ERROR An error occurred when attempting to access the ICI.
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@retval EFI_INVALID_PARAMETER This is NULL.
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@retval EFI_INVALID_PARAMETER Capabilities is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_IO_CRYPTO_GET_CAPABILITIES) (
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IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
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OUT EFI_BLOCK_IO_CRYPTO_CAPABILITIES *Capabilities
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);
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/**
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Set the configuration of the underlying inline cryptographic interface.
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The SetConfiguration() function allows the user to set the current configuration of the
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inline cryptographic interface and should be called before attempting any crypto operations.
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This configures the configuration table entries with algorithms, key sizes and keys. Each
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configured entry can later be referred to by index at the time of storage transaction.
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The configuration table index will refer to the combination ofKeyOwnerGuid, Algorithm, and
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CryptoKey.
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KeyOwnerGuid identifies the component taking ownership of the entry. It helps components to
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identify their own entries, cooperate with other owner components, and avoid conflicts. This
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Guid identifier is there to help coordination between cooperating components and not a security
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or synchronization feature. The Nil GUID can be used by a component to release use of entry
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owned. It is also used to identify potentially available entries (see GetConfiguration).
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CryptoKey specifies algorithm-specific key material to use within parameters of selected crypto
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capability.
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This function is called infrequently typically once, on device start, before IO starts. It
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can be called at later times in cases the number of keysused on the drive is higher than what
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can be configured at a time or a new key has to be added.
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Components setting or changing an entry or entries for a given index or indices must ensure
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that IO referencing affected indices is temporarily blocked (run-down) at the time of change.
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Indices parameters in each parameter table entry allow to set only a portion of the available
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table entries in the crypto module anywhere from single entry to entire table supported.
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If corresponding table entry or entries being set are already in use by another owner the call
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should be failed and none of the entries should be modified. The interface implementation must
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enforce atomicity of this operation (should either succeed fully or fail completely without
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modifying state).
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Note that components using GetConfiguration command to discover available entries should be
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prepared that by the time of calling SetConfiguration the previously available entry may have
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become occupied. Such components should be prepared to re-try the sequence of operations.
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Alternatively EFI_BLOCK_IO_CRYPTO_INDEX_ANY can be used to have the implementation discover
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and allocate available,if any, indices atomically.
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An optional ResultingTable pointer can be provided by the caller to receive the newly configured
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entries. The array provided by the caller must have at least ConfigurationCount of entries.
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@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
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@param[in] ConfigurationCount Number of entries being configured with this call.
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@param[in] ConfigurationTable Pointer to a table used to populate the configuration table.
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@param[out] ResultingTable Optional pointer to a table that receives the newly configured
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entries.
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@retval EFI_SUCCESS The ICI is ready for use.
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@retval EFI_NO_RESPONSE No response was received from the ICI.
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@retval EFI_DEVICE_ERROR An error occurred when attempting to access the ICI.
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@retval EFI_INVALID_PARAMETER This is NULL.
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@retval EFI_INVALID_PARAMETER ConfigurationTable is NULL.
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@retval EFI_INVALID_PARAMETER ConfigurationCount is 0.
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@retval EFI_OUT_OF_RESOURCES Could not find the requested number of available entries in the
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configuration table.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_IO_CRYPTO_SET_CONFIGURATION) (
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IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
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IN UINT64 ConfigurationCount,
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IN EFI_BLOCK_IO_CRYPTO_CONFIGURATION_TABLE_ENTRY *ConfigurationTable,
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OUT EFI_BLOCK_IO_CRYPTO_RESPONSE_CONFIGURATION_ENTRY *ResultingTable OPTIONAL
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);
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/**
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Get the configuration of the underlying inline cryptographic interface.
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The GetConfiguration() function allows the user to get the configuration of the inline
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cryptographic interface.
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Retrieves, entirely or partially, the currently configured key table. Note that the keys
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themselves are not retrieved, but rather just indices, owner GUIDs and capabilities.
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If fewer entries than specified by ConfigurationCount are returned, the Index field of the
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unused entries is set to EFI_BLOCK_IO_CRYPTO_INDEX_ANY.
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@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
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@param[in] StartIndex Configuration table index at which to start the configuration
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query.
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@param[in] ConfigurationCount Number of entries to return in the response table.
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@param[in] KeyOwnerGuid Optional parameter to filter response down to entries with a
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given owner. A pointer to the Nil value can be used to return
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available entries. Set to NULL when no owner filtering is required.
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@param[out] ConfigurationTable Table of configured configuration table entries (with no CryptoKey
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returned): configuration table index, KeyOwnerGuid, Capability.
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Should have sufficient space to store up to ConfigurationCount
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entries.
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@retval EFI_SUCCESS The ICI is ready for use.
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@retval EFI_NO_RESPONSE No response was received from the ICI.
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@retval EFI_DEVICE_ERROR An error occurred when attempting to access the ICI.
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@retval EFI_INVALID_PARAMETER This is NULL.
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@retval EFI_INVALID_PARAMETER Configuration table is NULL.
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@retval EFI_INVALID_PARAMETER StartIndex is out of bounds.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_IO_CRYPTO_GET_CONFIGURATION) (
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IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
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IN UINT64 StartIndex,
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IN UINT64 ConfigurationCount,
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IN EFI_GUID *KeyOwnerGuid OPTIONAL,
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OUT EFI_BLOCK_IO_CRYPTO_RESPONSE_CONFIGURATION_ENTRY *ConfigurationTable
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);
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/**
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Reads the requested number of blocks from the device and optionally decrypts
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them inline.
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TheReadExtended() function allows the caller to perform a storage device read
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operation. The function reads the requested number of blocks from the device
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and then if Index is specified decrypts them inline. All the blocks are read
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and decrypted (if decryption requested), or an error is returned.
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If there is no media in the device, the function returns EFI_NO_MEDIA. If the
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MediaId is not the ID for the current media in the device, the function returns
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EFI_MEDIA_CHANGED.
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If EFI_DEVICE_ERROR, EFI_NO_MEDIA, or EFI_MEDIA_CHANGED is returned and nonblocking
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I/O is being used, the Event associated with this request will not be signaled.
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In addition to standard storage transaction parameters (LBA, IO size, and buffer),
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this command will also specify a configuration table Index and CryptoIvInput
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when data has to be decrypted inline by the controller after being read from
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the storage device. If an Index parameter is not specified, no decryption is
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performed.
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@param[in] This Pointer to the EFI_BLOCK_IO_CRYPTO_PROTOCOL instance.
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@param[in] MediaId The media ID that the read request is for.
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@param[in] LBA The starting logical block address to read from on
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the device.
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@param[in, out] Token A pointer to the token associated with the transaction.
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@param[in] BufferSize The size of the Buffer in bytes. This must be a multiple
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of the intrinsic block size of the device.
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@param[out] Buffer A pointer to the destination buffer for the data. The
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caller is responsible for either having implicit or
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explicit ownership of the buffer.
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@param[in] Index A pointer to the configuration table index. This is
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optional.
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@param[in] CryptoIvInput A pointer to a buffer that contains additional
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cryptographic parameters as required by the capability
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referenced by the configuration table index, such as
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cryptographic initialization vector.
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@retval EFI_SUCCESS The read request was queued if Token-> Event is not NULL.
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The data was read correctly from the device if the
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Token->Event is NULL.
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@retval EFI_DEVICE_ERROR The device reported an error while attempting to perform
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the read operation and/or decryption operation.
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@retval EFI_NO_MEDIA There is no media in the device.
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@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
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@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the intrinsic
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block size of the device.
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@retval EFI_INVALID_PARAMETER This is NULL, or the read request contains LBAs that are
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not valid, or the buffer is not on proper alignment.
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@retval EFI_INVALID_PARAMETER CryptoIvInput is incorrect.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of
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resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_IO_CRYPTO_READ_EXTENDED) (
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IN EFI_BLOCK_IO_CRYPTO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN OUT EFI_BLOCK_IO_CRYPTO_TOKEN *Token,
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IN UINT64 BufferSize,
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OUT VOID *Buffer,
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IN UINT64 *Index OPTIONAL,
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IN VOID *CryptoIvInput OPTIONAL
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);
|
||
|
|
||
|
/**
|
||
|
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
|
||
|
|