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git.proxmox.com Git - mirror_edk2.git/blob - CryptoPkg/Library/BaseCryptLib/Hmac/CryptHmacMd5.c
2 HMAC-MD5 Wrapper Implementation over OpenSSL.
4 Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #include "InternalCryptLib.h"
16 #include <openssl/hmac.h>
19 Retrieves the size, in bytes, of the context buffer required for HMAC-MD5 operations.
21 @return The size, in bytes, of the context buffer required for HMAC-MD5 operations.
26 HmacMd5GetContextSize (
31 // Retrieves the OpenSSL HMAC-MD5 Context Size
33 return (UINTN
) (sizeof (HMAC_CTX
));
37 Initializes user-supplied memory pointed by HmacMd5Context as HMAC-MD5 context for
40 If HmacMd5Context is NULL, then return FALSE.
42 @param[out] HmacMd5Context Pointer to HMAC-MD5 context being initialized.
43 @param[in] Key Pointer to the user-supplied key.
44 @param[in] KeySize Key size in bytes.
46 @retval TRUE HMAC-MD5 context initialization succeeded.
47 @retval FALSE HMAC-MD5 context initialization failed.
53 OUT VOID
*HmacMd5Context
,
59 // Check input parameters.
61 if (HmacMd5Context
== NULL
|| KeySize
> INT_MAX
) {
66 // OpenSSL HMAC-MD5 Context Initialization
68 HMAC_CTX_init (HmacMd5Context
);
69 HMAC_Init_ex (HmacMd5Context
, Key
, (UINT32
) KeySize
, EVP_md5(), NULL
);
75 Makes a copy of an existing HMAC-MD5 context.
77 If HmacMd5Context is NULL, then return FALSE.
78 If NewHmacMd5Context is NULL, then return FALSE.
80 @param[in] HmacMd5Context Pointer to HMAC-MD5 context being copied.
81 @param[out] NewHmacMd5Context Pointer to new HMAC-MD5 context.
83 @retval TRUE HMAC-MD5 context copy succeeded.
84 @retval FALSE HMAC-MD5 context copy failed.
90 IN CONST VOID
*HmacMd5Context
,
91 OUT VOID
*NewHmacMd5Context
95 // Check input parameters.
97 if (HmacMd5Context
== NULL
|| NewHmacMd5Context
== NULL
) {
101 CopyMem (NewHmacMd5Context
, HmacMd5Context
, sizeof (HMAC_CTX
));
107 Digests the input data and updates HMAC-MD5 context.
109 This function performs HMAC-MD5 digest on a data buffer of the specified size.
110 It can be called multiple times to compute the digest of long or discontinuous data streams.
111 HMAC-MD5 context should be already correctly intialized by HmacMd5Init(), and should not be
112 finalized by HmacMd5Final(). Behavior with invalid context is undefined.
114 If HmacMd5Context is NULL, then return FALSE.
116 @param[in, out] HmacMd5Context Pointer to the HMAC-MD5 context.
117 @param[in] Data Pointer to the buffer containing the data to be digested.
118 @param[in] DataSize Size of Data buffer in bytes.
120 @retval TRUE HMAC-MD5 data digest succeeded.
121 @retval FALSE HMAC-MD5 data digest failed.
127 IN OUT VOID
*HmacMd5Context
,
133 // Check input parameters.
135 if (HmacMd5Context
== NULL
) {
140 // Check invalid parameters, in case that only DataLength was checked in OpenSSL
142 if (Data
== NULL
&& DataSize
!= 0) {
147 // OpenSSL HMAC-MD5 digest update
149 HMAC_Update (HmacMd5Context
, Data
, DataSize
);
155 Completes computation of the HMAC-MD5 digest value.
157 This function completes HMAC-MD5 digest computation and retrieves the digest value into
158 the specified memory. After this function has been called, the HMAC-MD5 context cannot
160 HMAC-MD5 context should be already correctly intialized by HmacMd5Init(), and should not be
161 finalized by HmacMd5Final(). Behavior with invalid HMAC-MD5 context is undefined.
163 If HmacMd5Context is NULL, then return FALSE.
164 If HmacValue is NULL, then return FALSE.
166 @param[in, out] HmacMd5Context Pointer to the HMAC-MD5 context.
167 @param[out] HmacValue Pointer to a buffer that receives the HMAC-MD5 digest
170 @retval TRUE HMAC-MD5 digest computation succeeded.
171 @retval FALSE HMAC-MD5 digest computation failed.
177 IN OUT VOID
*HmacMd5Context
,
184 // Check input parameters.
186 if (HmacMd5Context
== NULL
|| HmacValue
== NULL
) {
191 // OpenSSL HMAC-MD5 digest finalization
193 HMAC_Final (HmacMd5Context
, HmacValue
, &Length
);
194 HMAC_CTX_cleanup (HmacMd5Context
);