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/** @file
Implement TPM2 help.
Copyright (c) 2013 - 2016, 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 <IndustryStandard/UefiTcgPlatform.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
typedef struct {
TPMI_ALG_HASH HashAlgo;
UINT16 HashSize;
} INTERNAL_HASH_INFO;
STATIC INTERNAL_HASH_INFO mHashInfo[] = {
{TPM_ALG_SHA1, SHA1_DIGEST_SIZE},
{TPM_ALG_SHA256, SHA256_DIGEST_SIZE},
{TPM_ALG_SM3_256, SM3_256_DIGEST_SIZE},
{TPM_ALG_SHA384, SHA384_DIGEST_SIZE},
{TPM_ALG_SHA512, SHA512_DIGEST_SIZE},
};
/**
Return size of digest.
@param[in] HashAlgo Hash algorithm
@return size of digest
**/
UINT16
EFIAPI
GetHashSizeFromAlgo (
IN TPMI_ALG_HASH HashAlgo
)
{
UINTN Index;
for (Index = 0; Index < sizeof(mHashInfo)/sizeof(mHashInfo[0]); Index++) {
if (mHashInfo[Index].HashAlgo == HashAlgo) {
return mHashInfo[Index].HashSize;
}
}
return 0;
}
/**
Copy AuthSessionIn to TPM2 command buffer.
@param [in] AuthSessionIn Input AuthSession data
@param [out] AuthSessionOut Output AuthSession data in TPM2 command buffer
@return AuthSession size
**/
UINT32
EFIAPI
CopyAuthSessionCommand (
IN TPMS_AUTH_COMMAND *AuthSessionIn, OPTIONAL
OUT UINT8 *AuthSessionOut
)
{
UINT8 *Buffer;
Buffer = (UINT8 *)AuthSessionOut;
//
// Add in Auth session
//
if (AuthSessionIn != NULL) {
// sessionHandle
WriteUnaligned32 ((UINT32 *)Buffer, SwapBytes32(AuthSessionIn->sessionHandle));
Buffer += sizeof(UINT32);
// nonce
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16 (AuthSessionIn->nonce.size));
Buffer += sizeof(UINT16);
CopyMem (Buffer, AuthSessionIn->nonce.buffer, AuthSessionIn->nonce.size);
Buffer += AuthSessionIn->nonce.size;
// sessionAttributes
*(UINT8 *)Buffer = *(UINT8 *)&AuthSessionIn->sessionAttributes;
Buffer++;
// hmac
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16 (AuthSessionIn->hmac.size));
Buffer += sizeof(UINT16);
CopyMem (Buffer, AuthSessionIn->hmac.buffer, AuthSessionIn->hmac.size);
Buffer += AuthSessionIn->hmac.size;
} else {
// sessionHandle
WriteUnaligned32 ((UINT32 *)Buffer, SwapBytes32(TPM_RS_PW));
Buffer += sizeof(UINT32);
// nonce = nullNonce
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16(0));
Buffer += sizeof(UINT16);
// sessionAttributes = 0
*(UINT8 *)Buffer = 0x00;
Buffer++;
// hmac = nullAuth
WriteUnaligned16 ((UINT16 *)Buffer, SwapBytes16(0));
Buffer += sizeof(UINT16);
}
return (UINT32)(UINTN)(Buffer - (UINT8 *)AuthSessionOut);
}
/**
Copy AuthSessionIn from TPM2 response buffer.
@param [in] AuthSessionIn Input AuthSession data in TPM2 response buffer
@param [out] AuthSessionOut Output AuthSession data
@return AuthSession size
**/
UINT32
EFIAPI
CopyAuthSessionResponse (
IN UINT8 *AuthSessionIn,
OUT TPMS_AUTH_RESPONSE *AuthSessionOut OPTIONAL
)
{
UINT8 *Buffer;
TPMS_AUTH_RESPONSE LocalAuthSessionOut;
if (AuthSessionOut == NULL) {
AuthSessionOut = &LocalAuthSessionOut;
}
Buffer = (UINT8 *)AuthSessionIn;
// nonce
AuthSessionOut->nonce.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
Buffer += sizeof(UINT16);
CopyMem (AuthSessionOut->nonce.buffer, Buffer, AuthSessionOut->nonce.size);
Buffer += AuthSessionOut->nonce.size;
// sessionAttributes
*(UINT8 *)&AuthSessionOut->sessionAttributes = *(UINT8 *)Buffer;
Buffer++;
// hmac
AuthSessionOut->hmac.size = SwapBytes16 (ReadUnaligned16 ((UINT16 *)Buffer));
Buffer += sizeof(UINT16);
CopyMem (AuthSessionOut->hmac.buffer, Buffer, AuthSessionOut->hmac.size);
Buffer += AuthSessionOut->hmac.size;
return (UINT32)(UINTN)(Buffer - (UINT8 *)AuthSessionIn);
}
/**
This function get digest from digest list.
@param[in] HashAlg Digest algorithm
@param[in] DigestList Digest list
@param[out] Digest Digest
@retval EFI_SUCCESS Digest is found and returned.
@retval EFI_NOT_FOUND Digest is not found.
**/
EFI_STATUS
EFIAPI
GetDigestFromDigestList (
IN TPMI_ALG_HASH HashAlg,
IN TPML_DIGEST_VALUES *DigestList,
OUT VOID *Digest
)
{
UINTN Index;
UINT16 DigestSize;
DigestSize = GetHashSizeFromAlgo (HashAlg);
for (Index = 0; Index < DigestList->count; Index++) {
if (DigestList->digests[Index].hashAlg == HashAlg) {
CopyMem (
Digest,
&DigestList->digests[Index].digest,
DigestSize
);
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
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