/** @file
EFI_HASH2_SERVICE_BINDING_PROTOCOL as defined in UEFI 2.5.
EFI_HASH2_PROTOCOL as defined in UEFI 2.5.
The EFI Hash2 Service Binding Protocol is used to locate hashing services support
provided by a driver and to create and destroy instances of the EFI Hash2 Protocol
so that a multiple drivers can use the underlying hashing services.
EFI_HASH2_PROTOCOL describes hashing functions for which the algorithm-required
message padding and finalization are performed by the supporting driver.
Copyright (c) 2015, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __EFI_HASH2_PROTOCOL_H__
#define __EFI_HASH2_PROTOCOL_H__
#define EFI_HASH2_SERVICE_BINDING_PROTOCOL_GUID \
{ \
0xda836f8d, 0x217f, 0x4ca0, { 0x99, 0xc2, 0x1c, 0xa4, 0xe1, 0x60, 0x77, 0xea } \
}
#define EFI_HASH2_PROTOCOL_GUID \
{ \
0x55b1d734, 0xc5e1, 0x49db, { 0x96, 0x47, 0xb1, 0x6a, 0xfb, 0xe, 0x30, 0x5b } \
}
#include
//
// NOTE:
// Algorithms EFI_HASH_ALGORITHM_SHA1_NOPAD and
// EFI_HASH_ALGORITHM_SHA256_NOPAD_GUID are not compatible with
// EFI_HASH2_PROTOCOL and will return EFI_UNSUPPORTED if used with any
// EFI_HASH2_PROTOCOL function.
//
//
// Note: SHA-1 and MD5 are included for backwards compatibility.
// New driver implementations are encouraged to consider stronger algorithms.
//
typedef struct _EFI_HASH2_PROTOCOL EFI_HASH2_PROTOCOL;
typedef UINT8 EFI_MD5_HASH2[16];
typedef UINT8 EFI_SHA1_HASH2[20];
typedef UINT8 EFI_SHA224_HASH2[28];
typedef UINT8 EFI_SHA256_HASH2[32];
typedef UINT8 EFI_SHA384_HASH2[48];
typedef UINT8 EFI_SHA512_HASH2[64];
typedef union {
EFI_MD5_HASH2 Md5Hash;
EFI_SHA1_HASH2 Sha1Hash;
EFI_SHA224_HASH2 Sha224Hash;
EFI_SHA256_HASH2 Sha256Hash;
EFI_SHA384_HASH2 Sha384Hash;
EFI_SHA512_HASH2 Sha512Hash;
} EFI_HASH2_OUTPUT;
/**
Returns the size of the hash which results from a specific algorithm.
@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
@param[out] HashSize Holds the returned size of the algorithm's hash.
@retval EFI_SUCCESS Hash size returned successfully.
@retval EFI_INVALID_PARAMETER This or HashSize is NULL.
@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
or HashAlgorithm is null.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HASH2_GET_HASH_SIZE)(
IN CONST EFI_HASH2_PROTOCOL *This,
CONST_EFI_GUID_PTR_T HashAlgorithm,
OUT UINTN *HashSize
);
/**
Creates a hash for the specified message text. The hash is not extendable.
The output is final with any algorithm-required padding added by the function.
@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
@param[in] Message Points to the start of the message.
@param[in] MessageSize The size of Message, in bytes.
@param[in,out] Hash On input, points to a caller-allocated buffer of the size
returned by GetHashSize() for the specified HashAlgorithm.
On output, the buffer holds the resulting hash computed from the message.
@retval EFI_SUCCESS Hash returned successfully.
@retval EFI_INVALID_PARAMETER This or Hash is NULL.
@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
or HashAlgorithm is Null.
@retval EFI_OUT_OF_RESOURCES Some resource required by the function is not available
or MessageSize is greater than platform maximum.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HASH2_HASH)(
IN CONST EFI_HASH2_PROTOCOL *This,
CONST_EFI_GUID_PTR_T HashAlgorithm,
IN CONST UINT8 *Message,
IN UINTN MessageSize,
IN OUT EFI_HASH2_OUTPUT *Hash
);
/**
This function must be called to initialize a digest calculation to be subsequently performed using the
EFI_HASH2_PROTOCOL functions HashUpdate() and HashFinal().
@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
@retval EFI_SUCCESS Initialized successfully.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
or HashAlgorithm is Null.
@retval EFI_OUT_OF_RESOURCES Process failed due to lack of required resource.
@retval EFI_ALREADY_STARTED This function is called when the operation in progress is still in processing Hash(),
or HashInit() is already called before and not terminated by HashFinal() yet on the same instance.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HASH2_HASH_INIT)(
IN CONST EFI_HASH2_PROTOCOL *This,
CONST_EFI_GUID_PTR_T HashAlgorithm
);
/**
Updates the hash of a computation in progress by adding a message text.
@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
@param[in] Message Points to the start of the message.
@param[in] MessageSize The size of Message, in bytes.
@retval EFI_SUCCESS Digest in progress updated successfully.
@retval EFI_INVALID_PARAMETER This or Hash is NULL.
@retval EFI_OUT_OF_RESOURCES Some resource required by the function is not available
or MessageSize is greater than platform maximum.
@retval EFI_NOT_READY This call was not preceded by a valid call to HashInit(),
or the operation in progress was terminated by a call to Hash() or HashFinal() on the same instance.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HASH2_HASH_UPDATE)(
IN CONST EFI_HASH2_PROTOCOL *This,
IN CONST UINT8 *Message,
IN UINTN MessageSize
);
/**
Finalizes a hash operation in progress and returns calculation result.
The output is final with any necessary padding added by the function.
The hash may not be further updated or extended after HashFinal().
@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
@param[in,out] Hash On input, points to a caller-allocated buffer of the size
returned by GetHashSize() for the specified HashAlgorithm specified in preceding HashInit().
On output, the buffer holds the resulting hash computed from the message.
@retval EFI_SUCCESS Hash returned successfully.
@retval EFI_INVALID_PARAMETER This or Hash is NULL.
@retval EFI_NOT_READY This call was not preceded by a valid call to HashInit() and at least one call to HashUpdate(),
or the operation in progress was canceled by a call to Hash() on the same instance.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HASH2_HASH_FINAL)(
IN CONST EFI_HASH2_PROTOCOL *This,
IN OUT EFI_HASH2_OUTPUT *Hash
);
///
/// This protocol describes hashing functions for which the algorithm-required message padding and
/// finalization are performed by the supporting driver.
///
struct _EFI_HASH2_PROTOCOL {
EFI_HASH2_GET_HASH_SIZE GetHashSize;
EFI_HASH2_HASH Hash;
EFI_HASH2_HASH_INIT HashInit;
EFI_HASH2_HASH_UPDATE HashUpdate;
EFI_HASH2_HASH_FINAL HashFinal;
};
extern EFI_GUID gEfiHash2ServiceBindingProtocolGuid;
extern EFI_GUID gEfiHash2ProtocolGuid;
#endif