CryptSha256.c File Reference

#include "InternalCryptLib.h"
#include <openssl/sha.h>

Go to the source code of this file.

Functions
UINTN EFIAPI	Sha256GetContextSize (VOID)
BOOLEAN EFIAPI	Sha256Init (OUT VOID *Sha256Context)
BOOLEAN EFIAPI	Sha256Duplicate (IN CONST VOID *Sha256Context, OUT VOID *NewSha256Context)
BOOLEAN EFIAPI	Sha256Update (IN OUT VOID *Sha256Context, IN CONST VOID *Data, IN UINTN DataSize)
BOOLEAN EFIAPI	Sha256Final (IN OUT VOID *Sha256Context, OUT UINT8 *HashValue)
BOOLEAN EFIAPI	Sha256HashAll (IN CONST VOID *Data, IN UINTN DataSize, OUT UINT8 *HashValue)

Detailed Description

SHA-256 Digest Wrapper Implementation over OpenSSL.

Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CryptSha256.c.

Function Documentation

Sha256Duplicate()

BOOLEAN EFIAPI Sha256Duplicate	(	IN CONST VOID *	Sha256Context,
		OUT VOID *	NewSha256Context
	)

Makes a copy of an existing SHA-256 context.

If Sha256Context is NULL, then return FALSE. If NewSha256Context is NULL, then return FALSE.

Parameters

[in]	Sha256Context	Pointer to SHA-256 context being copied.
[out]	NewSha256Context	Pointer to new SHA-256 context.

Return values

TRUE	SHA-256 context copy succeeded.
FALSE	SHA-256 context copy failed.

Definition at line 76 of file CryptSha256.c.

Sha256Final()

BOOLEAN EFIAPI Sha256Final	(	IN OUT VOID *	Sha256Context,
		OUT UINT8 *	HashValue
	)

Completes computation of the SHA-256 digest value.

This function completes SHA-256 hash computation and retrieves the digest value into the specified memory. After this function has been called, the SHA-256 context cannot be used again. SHA-256 context should be already correctly initialized by Sha256Init(), and should not be finalized by Sha256Final(). Behavior with invalid SHA-256 context is undefined.

If Sha256Context is NULL, then return FALSE. If HashValue is NULL, then return FALSE.

Parameters

[in,out]	Sha256Context	Pointer to the SHA-256 context.
[out]	HashValue	Pointer to a buffer that receives the SHA-256 digest value (32 bytes).

Return values

TRUE	SHA-256 digest computation succeeded.
FALSE	SHA-256 digest computation failed.

Definition at line 161 of file CryptSha256.c.

Sha256GetContextSize()

UINTN EFIAPI Sha256GetContextSize

(

VOID

)

Retrieves the size, in bytes, of the context buffer required for SHA-256 hash operations.

Returns

The size, in bytes, of the context buffer required for SHA-256 hash operations.

Definition at line 20 of file CryptSha256.c.

Sha256HashAll()

BOOLEAN EFIAPI Sha256HashAll	(	IN CONST VOID *	Data,
		IN UINTN	DataSize,
		OUT UINT8 *	HashValue
	)

Computes the SHA-256 message digest of a input data buffer.

This function performs the SHA-256 message digest of a given data buffer, and places the digest value into the specified memory.

If this interface is not supported, then return FALSE.

Parameters

[in]	Data	Pointer to the buffer containing the data to be hashed.
[in]	DataSize	Size of Data buffer in bytes.
[out]	HashValue	Pointer to a buffer that receives the SHA-256 digest value (32 bytes).

Return values

TRUE	SHA-256 digest computation succeeded.
FALSE	SHA-256 digest computation failed.
FALSE	This interface is not supported.

Definition at line 199 of file CryptSha256.c.

Sha256Init()

BOOLEAN EFIAPI Sha256Init

(

OUT VOID *

Sha256Context

)

Initializes user-supplied memory pointed by Sha256Context as SHA-256 hash context for subsequent use.

If Sha256Context is NULL, then return FALSE.

Parameters

[out]

Sha256Context

Pointer to SHA-256 context being initialized.

Return values

TRUE	SHA-256 context initialization succeeded.
FALSE	SHA-256 context initialization failed.

Definition at line 44 of file CryptSha256.c.

Sha256Update()

BOOLEAN EFIAPI Sha256Update	(	IN OUT VOID *	Sha256Context,
		IN CONST VOID *	Data,
		IN UINTN	DataSize
	)

Digests the input data and updates SHA-256 context.

This function performs SHA-256 digest on a data buffer of the specified size. It can be called multiple times to compute the digest of long or discontinuous data streams. SHA-256 context should be already correctly initialized by Sha256Init(), and should not be finalized by Sha256Final(). Behavior with invalid context is undefined.

If Sha256Context is NULL, then return FALSE.

Parameters

[in,out]	Sha256Context	Pointer to the SHA-256 context.
[in]	Data	Pointer to the buffer containing the data to be hashed.
[in]	DataSize	Size of Data buffer in bytes.

Return values

TRUE	SHA-256 data digest succeeded.
FALSE	SHA-256 data digest failed.

Definition at line 113 of file CryptSha256.c.