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/** @file
HMAC-MD5 Wrapper Implementation over OpenSSL.
Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "InternalCryptLib.h"
#include <openssl/hmac.h>
//
// NOTE: OpenSSL redefines the size of HMAC_CTX at crypto/hmac/hmac_lcl.h
// #define HMAC_MAX_MD_CBLOCK_SIZE 144
//
#define HMAC_MD5_CTX_SIZE (sizeof(void *) * 4 + sizeof(unsigned int) + \
sizeof(unsigned char) * 144)
/**
Retrieves the size, in bytes, of the context buffer required for HMAC-MD5 operations.
(NOTE: This API is deprecated.
Use HmacMd5New() / HmacMd5Free() for HMAC-MD5 Context operations.)
@return The size, in bytes, of the context buffer required for HMAC-MD5 operations.
**/
UINTN
EFIAPI
HmacMd5GetContextSize (
VOID
)
{
//
// Retrieves the OpenSSL HMAC-MD5 Context Size
// NOTE: HMAC_CTX object was made opaque in openssl-1.1.x, here we just use the
// fixed size as a workaround to make this API work for compatibility.
// We should retire HmacMd5GetContextSize() in future, and use HmacMd5New()
// and HmacMd5Free() for context allocation and release.
//
return (UINTN) HMAC_MD5_CTX_SIZE;
}
/**
Allocates and initializes one HMAC_CTX context for subsequent HMAC-MD5 use.
@return Pointer to the HMAC_CTX context that has been initialized.
If the allocations fails, HmacMd5New() returns NULL.
**/
VOID *
EFIAPI
HmacMd5New (
VOID
)
{
//
// Allocates & Initializes HMAC_CTX Context by OpenSSL HMAC_CTX_new()
//
return (VOID *) HMAC_CTX_new ();
}
/**
Release the specified HMAC_CTX context.
@param[in] HmacMd5Ctx Pointer to the HMAC_CTX context to be released.
**/
VOID
EFIAPI
HmacMd5Free (
IN VOID *HmacMd5Ctx
)
{
//
// Free OpenSSL HMAC_CTX Context
//
HMAC_CTX_free ((HMAC_CTX *)HmacMd5Ctx);
}
/**
Initializes user-supplied memory pointed by HmacMd5Context as HMAC-MD5 context for
subsequent use.
If HmacMd5Context is NULL, then return FALSE.
@param[out] HmacMd5Context Pointer to HMAC-MD5 context being initialized.
@param[in] Key Pointer to the user-supplied key.
@param[in] KeySize Key size in bytes.
@retval TRUE HMAC-MD5 context initialization succeeded.
@retval FALSE HMAC-MD5 context initialization failed.
**/
BOOLEAN
EFIAPI
HmacMd5Init (
OUT VOID *HmacMd5Context,
IN CONST UINT8 *Key,
IN UINTN KeySize
)
{
//
// Check input parameters.
//
if (HmacMd5Context == NULL || KeySize > INT_MAX) {
return FALSE;
}
//
// OpenSSL HMAC-MD5 Context Initialization
//
memset(HmacMd5Context, 0, HMAC_MD5_CTX_SIZE);
if (HMAC_CTX_reset ((HMAC_CTX *)HmacMd5Context) != 1) {
return FALSE;
}
if (HMAC_Init_ex ((HMAC_CTX *)HmacMd5Context, Key, (UINT32) KeySize, EVP_md5(), NULL) != 1) {
return FALSE;
}
return TRUE;
}
/**
Makes a copy of an existing HMAC-MD5 context.
If HmacMd5Context is NULL, then return FALSE.
If NewHmacMd5Context is NULL, then return FALSE.
@param[in] HmacMd5Context Pointer to HMAC-MD5 context being copied.
@param[out] NewHmacMd5Context Pointer to new HMAC-MD5 context.
@retval TRUE HMAC-MD5 context copy succeeded.
@retval FALSE HMAC-MD5 context copy failed.
**/
BOOLEAN
EFIAPI
HmacMd5Duplicate (
IN CONST VOID *HmacMd5Context,
OUT VOID *NewHmacMd5Context
)
{
//
// Check input parameters.
//
if (HmacMd5Context == NULL || NewHmacMd5Context == NULL) {
return FALSE;
}
if (HMAC_CTX_copy ((HMAC_CTX *)NewHmacMd5Context, (HMAC_CTX *)HmacMd5Context) != 1) {
return FALSE;
}
return TRUE;
}
/**
Digests the input data and updates HMAC-MD5 context.
This function performs HMAC-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.
HMAC-MD5 context should be already correctly initialized by HmacMd5Init(), and should not be
finalized by HmacMd5Final(). Behavior with invalid context is undefined.
If HmacMd5Context is NULL, then return FALSE.
@param[in, out] HmacMd5Context Pointer to the HMAC-MD5 context.
@param[in] Data Pointer to the buffer containing the data to be digested.
@param[in] DataSize Size of Data buffer in bytes.
@retval TRUE HMAC-MD5 data digest succeeded.
@retval FALSE HMAC-MD5 data digest failed.
**/
BOOLEAN
EFIAPI
HmacMd5Update (
IN OUT VOID *HmacMd5Context,
IN CONST VOID *Data,
IN UINTN DataSize
)
{
//
// Check input parameters.
//
if (HmacMd5Context == NULL) {
return FALSE;
}
//
// Check invalid parameters, in case that only DataLength was checked in OpenSSL
//
if (Data == NULL && DataSize != 0) {
return FALSE;
}
//
// OpenSSL HMAC-MD5 digest update
//
if (HMAC_Update ((HMAC_CTX *)HmacMd5Context, Data, DataSize) != 1) {
return FALSE;
}
return TRUE;
}
/**
Completes computation of the HMAC-MD5 digest value.
This function completes HMAC-MD5 digest computation and retrieves the digest value into
the specified memory. After this function has been called, the HMAC-MD5 context cannot
be used again.
HMAC-MD5 context should be already correctly initialized by HmacMd5Init(), and should not be
finalized by HmacMd5Final(). Behavior with invalid HMAC-MD5 context is undefined.
If HmacMd5Context is NULL, then return FALSE.
If HmacValue is NULL, then return FALSE.
@param[in, out] HmacMd5Context Pointer to the HMAC-MD5 context.
@param[out] HmacValue Pointer to a buffer that receives the HMAC-MD5 digest
value (16 bytes).
@retval TRUE HMAC-MD5 digest computation succeeded.
@retval FALSE HMAC-MD5 digest computation failed.
**/
BOOLEAN
EFIAPI
HmacMd5Final (
IN OUT VOID *HmacMd5Context,
OUT UINT8 *HmacValue
)
{
UINT32 Length;
//
// Check input parameters.
//
if (HmacMd5Context == NULL || HmacValue == NULL) {
return FALSE;
}
//
// OpenSSL HMAC-MD5 digest finalization
//
if (HMAC_Final ((HMAC_CTX *)HmacMd5Context, HmacValue, &Length) != 1) {
return FALSE;
}
if (HMAC_CTX_reset ((HMAC_CTX *)HmacMd5Context) != 1) {
return FALSE;
}
return TRUE;
}
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