/** @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)); | |
} |