mirror of https://github.com/acidanthera/audk.git
611 lines
20 KiB
C
611 lines
20 KiB
C
/** @file
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This module implements Hash2 Protocol.
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(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
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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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**/
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#include <Uefi.h>
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#include <Protocol/Hash2.h>
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#include <Library/BaseLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseCryptLib.h>
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#include "Driver.h"
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/**
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Retrieves the size, in bytes, of the context buffer required for hash operations.
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If this interface is not supported, then return zero.
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@return The size, in bytes, of the context buffer required for hash operations.
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@retval 0 This interface is not supported.
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**/
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typedef
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UINTN
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(EFIAPI *EFI_HASH_GET_CONTEXT_SIZE) (
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VOID
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);
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/**
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Initializes user-supplied memory pointed by Sha1Context as hash context for
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subsequent use.
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If HashContext is NULL, then return FALSE.
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If this interface is not supported, then return FALSE.
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@param[out] HashContext Pointer to Hashcontext being initialized.
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@retval TRUE Hash context initialization succeeded.
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@retval FALSE Hash context initialization failed.
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@retval FALSE This interface is not supported.
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**/
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typedef
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BOOLEAN
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(EFIAPI *EFI_HASH_INIT) (
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OUT VOID *HashContext
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);
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/**
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Digests the input data and updates Hash context.
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This function performs Hash digest on a data buffer of the specified size.
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It can be called multiple times to compute the digest of long or discontinuous data streams.
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Hash context should be already correctly initialized by HashInit(), and should not be finalized
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by HashFinal(). Behavior with invalid context is undefined.
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If HashContext is NULL, then return FALSE.
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If this interface is not supported, then return FALSE.
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@param[in, out] HashContext Pointer to the Hash context.
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@param[in] Data Pointer to the buffer containing the data to be hashed.
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@param[in] DataSize Size of Data buffer in bytes.
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@retval TRUE SHA-1 data digest succeeded.
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@retval FALSE SHA-1 data digest failed.
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@retval FALSE This interface is not supported.
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**/
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typedef
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BOOLEAN
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(EFIAPI *EFI_HASH_UPDATE) (
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IN OUT VOID *HashContext,
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IN CONST VOID *Data,
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IN UINTN DataSize
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);
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/**
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Completes computation of the Hash digest value.
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This function completes hash computation and retrieves the digest value into
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the specified memory. After this function has been called, the Hash context cannot
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be used again.
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Hash context should be already correctly initialized by HashInit(), and should not be
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finalized by HashFinal(). Behavior with invalid Hash context is undefined.
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If HashContext is NULL, then return FALSE.
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If HashValue is NULL, then return FALSE.
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If this interface is not supported, then return FALSE.
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@param[in, out] HashContext Pointer to the Hash context.
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@param[out] HashValue Pointer to a buffer that receives the Hash digest
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value.
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@retval TRUE Hash digest computation succeeded.
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@retval FALSE Hash digest computation failed.
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@retval FALSE This interface is not supported.
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**/
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typedef
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BOOLEAN
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(EFIAPI *EFI_HASH_FINAL) (
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IN OUT VOID *HashContext,
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OUT UINT8 *HashValue
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);
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typedef struct {
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EFI_GUID *Guid;
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UINT32 HashSize;
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EFI_HASH_GET_CONTEXT_SIZE GetContextSize;
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EFI_HASH_INIT Init;
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EFI_HASH_UPDATE Update;
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EFI_HASH_FINAL Final;
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} EFI_HASH_INFO;
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EFI_HASH_INFO mHashInfo[] = {
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{&gEfiHashAlgorithmSha256Guid, sizeof(EFI_SHA256_HASH2), Sha256GetContextSize, Sha256Init, Sha256Update, Sha256Final },
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{&gEfiHashAlgorithmSha384Guid, sizeof(EFI_SHA384_HASH2), Sha384GetContextSize, Sha384Init, Sha384Update, Sha384Final },
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{&gEfiHashAlgorithmSha512Guid, sizeof(EFI_SHA512_HASH2), Sha512GetContextSize, Sha512Init, Sha512Update, Sha512Final },
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};
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/**
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Returns the size of the hash which results from a specific algorithm.
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@param[out] HashSize Holds the returned size of the algorithm's hash.
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@retval EFI_SUCCESS Hash size returned successfully.
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@retval EFI_INVALID_PARAMETER This or HashSize is NULL.
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@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
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or HashAlgorithm is null.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2GetHashSize (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST EFI_GUID *HashAlgorithm,
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OUT UINTN *HashSize
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);
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/**
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Creates a hash for the specified message text. The hash is not extendable.
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The output is final with any algorithm-required padding added by the function.
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@param[in] Message Points to the start of the message.
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@param[in] MessageSize The size of Message, in bytes.
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@param[in,out] Hash On input, points to a caller-allocated buffer of the size
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returned by GetHashSize() for the specified HashAlgorithm.
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On output, the buffer holds the resulting hash computed from the message.
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@retval EFI_SUCCESS Hash returned successfully.
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@retval EFI_INVALID_PARAMETER This or Hash is NULL.
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@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
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or HashAlgorithm is Null.
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@retval EFI_OUT_OF_RESOURCES Some resource required by the function is not available
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or MessageSize is greater than platform maximum.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2Hash (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST EFI_GUID *HashAlgorithm,
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IN CONST UINT8 *Message,
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IN UINTN MessageSize,
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IN OUT EFI_HASH2_OUTPUT *Hash
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);
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/**
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This function must be called to initialize a digest calculation to be subsequently performed using the
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EFI_HASH2_PROTOCOL functions HashUpdate() and HashFinal().
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@retval EFI_SUCCESS Initialized successfully.
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@retval EFI_INVALID_PARAMETER This is NULL.
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@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
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or HashAlgorithm is Null.
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@retval EFI_OUT_OF_RESOURCES Process failed due to lack of required resource.
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@retval EFI_ALREADY_STARTED This function is called when the operation in progress is still in processing Hash(),
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or HashInit() is already called before and not terminated by HashFinal() yet on the same instance.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2HashInit (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST EFI_GUID *HashAlgorithm
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);
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/**
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Updates the hash of a computation in progress by adding a message text.
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] Message Points to the start of the message.
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@param[in] MessageSize The size of Message, in bytes.
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@retval EFI_SUCCESS Digest in progress updated successfully.
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@retval EFI_INVALID_PARAMETER This or Hash is NULL.
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@retval EFI_OUT_OF_RESOURCES Some resource required by the function is not available
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or MessageSize is greater than platform maximum.
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@retval EFI_NOT_READY This call was not preceded by a valid call to HashInit(),
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or the operation in progress was terminated by a call to Hash() or HashFinal() on the same instance.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2HashUpdate (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST UINT8 *Message,
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IN UINTN MessageSize
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);
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/**
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Finalizes a hash operation in progress and returns calculation result.
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The output is final with any necessary padding added by the function.
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The hash may not be further updated or extended after HashFinal().
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in,out] Hash On input, points to a caller-allocated buffer of the size
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returned by GetHashSize() for the specified HashAlgorithm specified in preceding HashInit().
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On output, the buffer holds the resulting hash computed from the message.
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@retval EFI_SUCCESS Hash returned successfully.
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@retval EFI_INVALID_PARAMETER This or Hash is NULL.
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@retval EFI_NOT_READY This call was not preceded by a valid call to HashInit() and at least one call to HashUpdate(),
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or the operation in progress was canceled by a call to Hash() on the same instance.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2HashFinal (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN OUT EFI_HASH2_OUTPUT *Hash
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);
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EFI_HASH2_PROTOCOL mHash2Protocol = {
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BaseCrypto2GetHashSize,
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BaseCrypto2Hash,
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BaseCrypto2HashInit,
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BaseCrypto2HashUpdate,
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BaseCrypto2HashFinal,
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};
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/**
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Returns hash information.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@return Hash information.
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**/
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EFI_HASH_INFO *
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GetHashInfo (
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IN CONST EFI_GUID *HashAlgorithm
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)
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{
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UINTN Index;
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for (Index = 0; Index < sizeof(mHashInfo)/sizeof(mHashInfo[0]); Index++) {
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if (CompareGuid (HashAlgorithm, mHashInfo[Index].Guid)) {
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return &mHashInfo[Index];
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}
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}
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return NULL;
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}
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/**
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Returns the size of the hash which results from a specific algorithm.
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@param[out] HashSize Holds the returned size of the algorithm's hash.
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@retval EFI_SUCCESS Hash size returned successfully.
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@retval EFI_INVALID_PARAMETER This or HashSize is NULL.
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@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
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or HashAlgorithm is null.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2GetHashSize (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST EFI_GUID *HashAlgorithm,
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OUT UINTN *HashSize
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)
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{
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EFI_HASH_INFO *HashInfo;
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if ((This == NULL) || (HashSize == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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if (HashAlgorithm == NULL) {
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return EFI_UNSUPPORTED;
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}
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HashInfo = GetHashInfo (HashAlgorithm);
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if (HashInfo == NULL) {
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return EFI_UNSUPPORTED;
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}
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*HashSize = HashInfo->HashSize;
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return EFI_SUCCESS;
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}
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/**
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Creates a hash for the specified message text. The hash is not extendable.
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The output is final with any algorithm-required padding added by the function.
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@param[in] Message Points to the start of the message.
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@param[in] MessageSize The size of Message, in bytes.
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@param[in,out] Hash On input, points to a caller-allocated buffer of the size
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returned by GetHashSize() for the specified HashAlgorithm.
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On output, the buffer holds the resulting hash computed from the message.
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@retval EFI_SUCCESS Hash returned successfully.
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@retval EFI_INVALID_PARAMETER This or Hash is NULL.
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@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
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or HashAlgorithm is Null.
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@retval EFI_OUT_OF_RESOURCES Some resource required by the function is not available
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or MessageSize is greater than platform maximum.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2Hash (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST EFI_GUID *HashAlgorithm,
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IN CONST UINT8 *Message,
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IN UINTN MessageSize,
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IN OUT EFI_HASH2_OUTPUT *Hash
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)
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{
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EFI_HASH_INFO *HashInfo;
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VOID *HashCtx;
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UINTN CtxSize;
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BOOLEAN Ret;
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EFI_STATUS Status;
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HASH2_INSTANCE_DATA *Instance;
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Status = EFI_SUCCESS;
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if ((This == NULL) || (Hash == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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if (HashAlgorithm == NULL) {
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return EFI_UNSUPPORTED;
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}
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HashInfo = GetHashInfo (HashAlgorithm);
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if (HashInfo == NULL) {
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return EFI_UNSUPPORTED;
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}
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Instance = HASH2_INSTANCE_DATA_FROM_THIS(This);
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if (Instance->HashContext != NULL) {
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FreePool (Instance->HashContext);
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}
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Instance->HashInfoContext = NULL;
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Instance->HashContext = NULL;
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//
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// Start hash sequence
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//
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CtxSize = HashInfo->GetContextSize ();
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if (CtxSize == 0) {
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return EFI_UNSUPPORTED;
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}
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HashCtx = AllocatePool (CtxSize);
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if (HashCtx == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Ret = HashInfo->Init (HashCtx);
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if (!Ret) {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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//
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// Setup the context
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//
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Instance->HashContext = HashCtx;
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Instance->HashInfoContext = HashInfo;
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Ret = HashInfo->Update (HashCtx, Message, MessageSize);
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if (!Ret) {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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Ret = HashInfo->Final (HashCtx, (UINT8 *)Hash->Sha1Hash);
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if (!Ret) {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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Done:
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//
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// Cleanup the context
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//
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FreePool (HashCtx);
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Instance->HashInfoContext = NULL;
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Instance->HashContext = NULL;
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return Status;
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}
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/**
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This function must be called to initialize a digest calculation to be subsequently performed using the
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EFI_HASH2_PROTOCOL functions HashUpdate() and HashFinal().
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
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@retval EFI_SUCCESS Initialized successfully.
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@retval EFI_INVALID_PARAMETER This is NULL.
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@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this driver
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or HashAlgorithm is Null.
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@retval EFI_OUT_OF_RESOURCES Process failed due to lack of required resource.
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@retval EFI_ALREADY_STARTED This function is called when the operation in progress is still in processing Hash(),
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or HashInit() is already called before and not terminated by HashFinal() yet on the same instance.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2HashInit (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST EFI_GUID *HashAlgorithm
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)
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{
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EFI_HASH_INFO *HashInfo;
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VOID *HashCtx;
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UINTN CtxSize;
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BOOLEAN Ret;
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HASH2_INSTANCE_DATA *Instance;
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if (This == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (HashAlgorithm == NULL) {
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return EFI_UNSUPPORTED;
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}
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HashInfo = GetHashInfo (HashAlgorithm);
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if (HashInfo == NULL) {
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return EFI_UNSUPPORTED;
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}
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//
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// Consistency Check
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//
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Instance = HASH2_INSTANCE_DATA_FROM_THIS(This);
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if ((Instance->HashContext != NULL) || (Instance->HashInfoContext != NULL)) {
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return EFI_ALREADY_STARTED;
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}
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//
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// Start hash sequence
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//
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CtxSize = HashInfo->GetContextSize ();
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if (CtxSize == 0) {
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return EFI_UNSUPPORTED;
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}
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HashCtx = AllocatePool (CtxSize);
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if (HashCtx == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Ret = HashInfo->Init (HashCtx);
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if (!Ret) {
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FreePool (HashCtx);
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Setup the context
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//
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Instance->HashContext = HashCtx;
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Instance->HashInfoContext = HashInfo;
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Instance->Updated = FALSE;
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return EFI_SUCCESS;
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}
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/**
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Updates the hash of a computation in progress by adding a message text.
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@param[in] This Points to this instance of EFI_HASH2_PROTOCOL.
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@param[in] Message Points to the start of the message.
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@param[in] MessageSize The size of Message, in bytes.
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@retval EFI_SUCCESS Digest in progress updated successfully.
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@retval EFI_INVALID_PARAMETER This or Hash is NULL.
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@retval EFI_OUT_OF_RESOURCES Some resource required by the function is not available
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or MessageSize is greater than platform maximum.
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@retval EFI_NOT_READY This call was not preceded by a valid call to HashInit(),
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or the operation in progress was terminated by a call to Hash() or HashFinal() on the same instance.
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**/
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EFI_STATUS
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EFIAPI
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BaseCrypto2HashUpdate (
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IN CONST EFI_HASH2_PROTOCOL *This,
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IN CONST UINT8 *Message,
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IN UINTN MessageSize
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)
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{
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EFI_HASH_INFO *HashInfo;
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VOID *HashCtx;
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BOOLEAN Ret;
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HASH2_INSTANCE_DATA *Instance;
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|
|
if (This == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Consistency Check
|
|
//
|
|
Instance = HASH2_INSTANCE_DATA_FROM_THIS(This);
|
|
if ((Instance->HashContext == NULL) || (Instance->HashInfoContext == NULL)) {
|
|
return EFI_NOT_READY;
|
|
}
|
|
HashInfo = Instance->HashInfoContext;
|
|
HashCtx = Instance->HashContext;
|
|
|
|
Ret = HashInfo->Update (HashCtx, Message, MessageSize);
|
|
if (!Ret) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
Instance->Updated = TRUE;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
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.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
BaseCrypto2HashFinal (
|
|
IN CONST EFI_HASH2_PROTOCOL *This,
|
|
IN OUT EFI_HASH2_OUTPUT *Hash
|
|
)
|
|
{
|
|
EFI_HASH_INFO *HashInfo;
|
|
VOID *HashCtx;
|
|
BOOLEAN Ret;
|
|
HASH2_INSTANCE_DATA *Instance;
|
|
|
|
if ((This == NULL) || (Hash == NULL)) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Consistency Check
|
|
//
|
|
Instance = HASH2_INSTANCE_DATA_FROM_THIS(This);
|
|
if ((Instance->HashContext == NULL) || (Instance->HashInfoContext == NULL) ||
|
|
(!Instance->Updated)) {
|
|
return EFI_NOT_READY;
|
|
}
|
|
HashInfo = Instance->HashInfoContext;
|
|
HashCtx = Instance->HashContext;
|
|
|
|
Ret = HashInfo->Final (HashCtx, (UINT8 *)Hash->Sha1Hash);
|
|
|
|
//
|
|
// Cleanup the context
|
|
//
|
|
FreePool (HashCtx);
|
|
Instance->HashInfoContext = NULL;
|
|
Instance->HashContext = NULL;
|
|
Instance->Updated = FALSE;
|
|
|
|
if (!Ret) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|