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/** @file
Common operation for Security.
Copyright (c) 2009 - 2010, 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 "IpSecCryptIo.h"
//
// Alogrithm's informations for the Encrypt/Decrpt Alogrithm.
//
ENCRYPT_ALGORITHM mIpsecEncryptAlgorithmList[IPSEC_ENCRYPT_ALGORITHM_LIST_SIZE] = {
{EFI_IPSEC_EALG_NULL, 0, 0, 1, NULL, NULL, NULL, NULL},
{(UINT8)-1, 0, 0, 0, NULL, NULL, NULL, NULL}
};
//
// Alogrithm's informations for the Authentication algorithm
//
AUTH_ALGORITHM mIpsecAuthAlgorithmList[IPSEC_AUTH_ALGORITHM_LIST_SIZE] = {
{EFI_IPSEC_AALG_NONE, 0, 0, 0, NULL, NULL, NULL, NULL},
{EFI_IPSEC_AALG_NULL, 0, 0, 0, NULL, NULL, NULL, NULL},
{(UINT8)-1, 0, 0, 0, NULL, NULL, NULL, NULL}
};
/**
Get the block size of encrypt alogrithm. The block size is based on the algorithm used.
@param[in] AlgorithmId The encrypt algorithm ID.
@return The value of block size.
**/
UINTN
IpSecGetEncryptBlockSize (
IN UINT8 AlgorithmId
)
{
UINT8 Index;
for (Index = 0; Index < IPSEC_ENCRYPT_ALGORITHM_LIST_SIZE; Index++) {
if (AlgorithmId == mIpsecEncryptAlgorithmList[Index].AlgorithmId) {
//
// The BlockSize is same with IvSize.
//
return mIpsecEncryptAlgorithmList[Index].BlockSize;
}
}
return (UINTN) -1;
}
/**
Get the IV size of encrypt alogrithm. The IV size is based on the algorithm used.
@param[in] AlgorithmId The encrypt algorithm ID.
@return The value of IV size.
**/
UINTN
IpSecGetEncryptIvLength (
IN UINT8 AlgorithmId
)
{
UINT8 Index;
for (Index = 0; Index < IPSEC_ENCRYPT_ALGORITHM_LIST_SIZE; Index++) {
if (AlgorithmId == mIpsecEncryptAlgorithmList[Index].AlgorithmId) {
//
// The BlockSize is same with IvSize.
//
return mIpsecEncryptAlgorithmList[Index].IvLength;
}
}
return (UINTN) -1;
}
/**
Get the ICV size of Authenticaion alogrithm. The ICV size is based on the algorithm used.
@param[in] AuthAlgorithmId The Authentication algorithm ID.
@return The value of ICV size.
**/
UINTN
IpSecGetIcvLength (
IN UINT8 AuthAlgorithmId
)
{
UINT8 Index;
for (Index = 0; Index < IPSEC_AUTH_ALGORITHM_LIST_SIZE; Index++) {
if (AuthAlgorithmId == mIpsecAuthAlgorithmList[Index].AlgorithmId) {
return mIpsecAuthAlgorithmList[Index].IcvLength;
}
}
return (UINTN) -1;
}
/**
Generate a random data for IV. If the IvSize is zero, not needed to create
IV and return EFI_SUCCESS.
@param[in] IvBuffer The pointer of the IV buffer.
@param[in] IvSize The IV size.
@retval EFI_SUCCESS Create a random data for IV.
**/
EFI_STATUS
IpSecGenerateIv (
IN UINT8 *IvBuffer,
IN UINTN IvSize
)
{
if (IvSize != 0) {
//
//TODO: return CryptGenerateRandom (IvBuffer, IvSize);
//
return EFI_SUCCESS;
}
return EFI_SUCCESS;
}
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