sysapi/sysapi/Tss2_Sys_EC_Ephemeral.c

/***********************************************************************;
 * Copyright (c) 2015, Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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#include <sapi/tpm20.h>
#include "sysapi_util.h"

TPM_RC Tss2_Sys_EC_Ephemeral_Prepare(
    TSS2_SYS_CONTEXT *sysContext,
    TPMI_ECC_CURVE	curveID
    )
{
    if( sysContext == NULL )
    {
        return( TSS2_SYS_RC_BAD_REFERENCE );
    }



    CommonPreparePrologue( sysContext, TPM_CC_EC_Ephemeral );



    Marshal_UINT16( SYS_CONTEXT->tpmInBuffPtr, SYS_CONTEXT->maxCommandSize, &(SYS_CONTEXT->nextData), curveID, &(SYS_CONTEXT->rval) );

    SYS_CONTEXT->decryptAllowed = 0;
    SYS_CONTEXT->encryptAllowed = 1;
    SYS_CONTEXT->authAllowed = 1;

    CommonPrepareEpilogue( sysContext );

    return SYS_CONTEXT->rval;
}

TPM_RC Tss2_Sys_EC_Ephemeral_Complete(
    TSS2_SYS_CONTEXT *sysContext,
    TPM2B_ECC_POINT	*Q,
    UINT16	*counter
    )
{
    if( sysContext == NULL )
    {
        return( TSS2_SYS_RC_BAD_REFERENCE );
    }

    CommonComplete( sysContext );

    Unmarshal_TPM2B_ECC_POINT( sysContext, Q );

    Unmarshal_UINT16( SYS_CONTEXT->tpmInBuffPtr, SYS_CONTEXT->maxCommandSize, &(SYS_CONTEXT->nextData), counter, &(SYS_CONTEXT->rval) );

    return SYS_CONTEXT->rval;
}

TPM_RC Tss2_Sys_EC_Ephemeral(
    TSS2_SYS_CONTEXT *sysContext,
    TSS2_SYS_CMD_AUTHS const *cmdAuthsArray,
    TPMI_ECC_CURVE	curveID,
    TPM2B_ECC_POINT	*Q,
    UINT16	*counter,
    TSS2_SYS_RSP_AUTHS *rspAuthsArray
    )
{
    TSS2_RC     rval = TPM_RC_SUCCESS;



    rval = Tss2_Sys_EC_Ephemeral_Prepare( sysContext, curveID );

    if( rval == TSS2_RC_SUCCESS )
    {
        rval = CommonOneCall( sysContext, cmdAuthsArray, rspAuthsArray );

        if( rval == TSS2_RC_SUCCESS )
        {
            rval = Tss2_Sys_EC_Ephemeral_Complete( sysContext, Q, counter );
        }
    }

    return rval;
}