test/tpmclient/LoadExternalHMACKey.c

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// Copyright (c) 2015, Intel Corporation
// All rights reserved.
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#include "tss2_sys.h"

#include "sysapi_util.h"
#include "sample.h"


UINT32 LoadExternalHMACKey( TPMI_ALG_HASH hashAlg, TPM2B *key, TPM2_HANDLE *keyHandle, TPM2B_NAME *keyName )
{
    TPM2B keyAuth = { 0 };
    TPM2B_SENSITIVE inPrivate;
    TPM2B_PUBLIC inPublic;
    UINT32 rval;
    TSS2_SYS_CONTEXT *sysContext;

    keyAuth.size = 0;

    inPrivate.sensitiveArea.sensitiveType = TPM2_ALG_KEYEDHASH;
    inPrivate.size = CopySizedByteBuffer((TPM2B *)&inPrivate.sensitiveArea.authValue, (TPM2B *)&keyAuth);
    inPrivate.sensitiveArea.seedValue.size = 0;
    inPrivate.size += CopySizedByteBuffer((TPM2B *)&inPrivate.sensitiveArea.sensitive.bits, (TPM2B *)key);
    inPrivate.size += 2 * sizeof( UINT16 );

    inPublic.publicArea.type = TPM2_ALG_KEYEDHASH;
    inPublic.publicArea.nameAlg = TPM2_ALG_NULL;
    *( UINT32 *)&( inPublic.publicArea.objectAttributes )= 0;
    inPublic.publicArea.objectAttributes |= TPMA_OBJECT_SIGN;
    inPublic.publicArea.objectAttributes |= TPMA_OBJECT_USERWITHAUTH;
    inPublic.publicArea.authPolicy.size = 0;
    inPublic.publicArea.parameters.keyedHashDetail.scheme.scheme = TPM2_ALG_HMAC;
    inPublic.publicArea.parameters.keyedHashDetail.scheme.details.hmac.hashAlg = hashAlg;
    inPublic.publicArea.unique.keyedHash.size = 0;

    sysContext = InitSysContext( 1000, resMgrTctiContext, &abiVersion );
    if( sysContext == 0 )
    {
        TeardownSysContext( &sysContext );
        return TSS2_APP_RC_LAYER + TPM2_RC_FAILURE;
    }

    INIT_SIMPLE_TPM2B_SIZE( *keyName );
    rval = Tss2_Sys_LoadExternal( sysContext, 0, &inPrivate, &inPublic, TPM2_RH_NULL, keyHandle, keyName, 0 );

    TeardownSysContext( &sysContext );

    return rval;
}