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/*
* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file fsl_shw_rand.c
*
* This file implements Random Number Generation functions of the FSL SHW API
* for Sahara.
*/
#include "sahara.h"
#include "sf_util.h"
#ifdef __KERNEL__
EXPORT_SYMBOL(fsl_shw_get_random);
#endif
/* REQ-S2LRD-PINTFC-API-BASIC-RNG-002 */
/*!
* Get a random number
*
*
* @param user_ctx
* @param length
* @param data
*
* @return A return code of type #fsl_shw_return_t.
*/
fsl_shw_return_t fsl_shw_get_random(fsl_shw_uco_t * user_ctx,
uint32_t length, uint8_t * data)
{
SAH_SF_DCLS;
/* perform a sanity check on the uco */
ret = sah_validate_uco(user_ctx);
if (ret != FSL_RETURN_OK_S) {
goto out;
}
header = SAH_HDR_RNG_GENERATE; /* Desc. #18 */
DESC_OUT_OUT(header, length, data, 0, NULL);
SAH_SF_EXECUTE();
out:
SAH_SF_DESC_CLEAN();
return ret;
}
#ifdef __KERNEL__
EXPORT_SYMBOL(fsl_shw_add_entropy);
#endif
/*!
* Add entropy to a random number generator
* @param user_ctx
* @param length
* @param data
*
* @return A return code of type #fsl_shw_return_t.
*/
fsl_shw_return_t fsl_shw_add_entropy(fsl_shw_uco_t * user_ctx,
uint32_t length, uint8_t * data)
{
SAH_SF_DCLS;
/* perform a sanity check on the uco */
ret = sah_validate_uco(user_ctx);
if (ret != FSL_RETURN_OK_S) {
goto out;
}
header = SAH_HDR_RNG_GENERATE; /* Desc. #18 */
/* create descriptor #18. Generate random data */
DESC_IN_IN(header, 0, NULL, length, data)
SAH_SF_EXECUTE();
out:
SAH_SF_DESC_CLEAN();
return ret;
}
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