/edk2/CryptoPkg/Library/BaseCryptLib/Hash/CryptMd5.c
C | 185 lines | 62 code | 14 blank | 109 comment | 16 complexity | aa6eb885aba0a29ada361df6c9bc3d99 MD5 | raw file
- /** @file
- MD5 Digest Wrapper Implementation over OpenSSL.
-
- Copyright (c) 2009 - 2012, 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.
-
- **/
-
- #include "InternalCryptLib.h"
- #include <openssl/md5.h>
-
-
- /**
- Retrieves the size, in bytes, of the context buffer required for MD5 hash operations.
-
- @return The size, in bytes, of the context buffer required for MD5 hash operations.
-
- **/
- UINTN
- EFIAPI
- Md5GetContextSize (
- VOID
- )
- {
- //
- // Retrieves the OpenSSL MD5 Context Size
- //
- return (UINTN) (sizeof (MD5_CTX));
- }
-
-
- /**
- Initializes user-supplied memory pointed by Md5Context as MD5 hash context for
- subsequent use.
-
- If Md5Context is NULL, then return FALSE.
-
- @param[out] Md5Context Pointer to MD5 context being initialized.
-
- @retval TRUE MD5 context initialization succeeded.
- @retval FALSE MD5 context initialization failed.
-
- **/
- BOOLEAN
- EFIAPI
- Md5Init (
- OUT VOID *Md5Context
- )
- {
- //
- // Check input parameters.
- //
- if (Md5Context == NULL) {
- return FALSE;
- }
-
- //
- // OpenSSL MD5 Context Initialization
- //
- return (BOOLEAN) (MD5_Init ((MD5_CTX *) Md5Context));
- }
-
- /**
- Makes a copy of an existing MD5 context.
-
- If Md5Context is NULL, then return FALSE.
- If NewMd5Context is NULL, then return FALSE.
-
- @param[in] Md5Context Pointer to MD5 context being copied.
- @param[out] NewMd5Context Pointer to new MD5 context.
-
- @retval TRUE MD5 context copy succeeded.
- @retval FALSE MD5 context copy failed.
-
- **/
- BOOLEAN
- EFIAPI
- Md5Duplicate (
- IN CONST VOID *Md5Context,
- OUT VOID *NewMd5Context
- )
- {
- //
- // Check input parameters.
- //
- if (Md5Context == NULL || NewMd5Context == NULL) {
- return FALSE;
- }
-
- CopyMem (NewMd5Context, Md5Context, sizeof (MD5_CTX));
-
- return TRUE;
- }
-
- /**
- Digests the input data and updates MD5 context.
-
- This function performs MD5 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.
- MD5 context should be already correctly intialized by Md5Init(), and should not be finalized
- by Md5Final(). Behavior with invalid context is undefined.
-
- If Md5Context is NULL, then return FALSE.
-
- @param[in, out] Md5Context Pointer to the MD5 context.
- @param[in] Data Pointer to the buffer containing the data to be hashed.
- @param[in] DataSize Size of Data buffer in bytes.
-
- @retval TRUE MD5 data digest succeeded.
- @retval FALSE MD5 data digest failed.
-
- **/
- BOOLEAN
- EFIAPI
- Md5Update (
- IN OUT VOID *Md5Context,
- IN CONST VOID *Data,
- IN UINTN DataSize
- )
- {
- //
- // Check input parameters.
- //
- if (Md5Context == NULL) {
- return FALSE;
- }
-
- //
- // Check invalid parameters, in case that only DataLength was checked in OpenSSL
- //
- if (Data == NULL && (DataSize != 0)) {
- return FALSE;
- }
-
- //
- // OpenSSL MD5 Hash Update
- //
- return (BOOLEAN) (MD5_Update ((MD5_CTX *) Md5Context, Data, DataSize));
- }
-
- /**
- Completes computation of the MD5 digest value.
-
- This function completes MD5 hash computation and retrieves the digest value into
- the specified memory. After this function has been called, the MD5 context cannot
- be used again.
- MD5 context should be already correctly intialized by Md5Init(), and should not be
- finalized by Md5Final(). Behavior with invalid MD5 context is undefined.
-
- If Md5Context is NULL, then return FALSE.
- If HashValue is NULL, then return FALSE.
-
- @param[in, out] Md5Context Pointer to the MD5 context.
- @param[out] HashValue Pointer to a buffer that receives the MD5 digest
- value (16 bytes).
-
- @retval TRUE MD5 digest computation succeeded.
- @retval FALSE MD5 digest computation failed.
-
- **/
- BOOLEAN
- EFIAPI
- Md5Final (
- IN OUT VOID *Md5Context,
- OUT UINT8 *HashValue
- )
- {
- //
- // Check input parameters.
- //
- if (Md5Context == NULL || HashValue == NULL) {
- return FALSE;
- }
-
- //
- // OpenSSL MD5 Hash Finalization
- //
- return (BOOLEAN) (MD5_Final (HashValue, (MD5_CTX *) Md5Context));
- }