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| author | Steve Langasek <steve.langasek@ubuntu.com> | 2012-08-29 16:51:10 -0700 |
|---|---|---|
| committer | Steve Langasek <steve.langasek@canonical.com> | 2012-08-29 16:51:10 -0700 |
| commit | 3e5756512efd00beca8e76ea70d5924056aa4714 (patch) | |
| tree | 0ec3924871c45ea16b10e5ff536e21b7a77af7c9 /Cryptlib/Hash/CryptMd5.c | |
| download | efi-boot-shim-3e5756512efd00beca8e76ea70d5924056aa4714.tar.gz efi-boot-shim-3e5756512efd00beca8e76ea70d5924056aa4714.zip | |
Import upstream version 0~20120728.3df9e294
Diffstat (limited to 'Cryptlib/Hash/CryptMd5.c')
| -rw-r--r-- | Cryptlib/Hash/CryptMd5.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/Cryptlib/Hash/CryptMd5.c b/Cryptlib/Hash/CryptMd5.c new file mode 100644 index 00000000..1d852c74 --- /dev/null +++ b/Cryptlib/Hash/CryptMd5.c @@ -0,0 +1,185 @@ +/** @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));
+}
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