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[efr32] call mbedtls_hardware_poll directly in otPlatEntropyGet() (#5744)

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This commit is contained in:
Mason Tran
2020-10-30 11:56:59 -07:00
committed by GitHub
parent c0a6963db9
commit a6e8848a5e
1 changed files with 10 additions and 14 deletions
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examples/platforms/efr32/src/entropy.c
+10 -14
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@@ -33,29 +33,25 @@
*/
#include <openthread/platform/entropy.h>
#include "mbedtls/entropy_poll.h"
#include "utils/code_utils.h"
static uint32_t randomUint32Get(void)
{
uint32_t random = 0;
size_t ouputLen = 0;
mbedtls_hardware_poll(NULL, (unsigned char *)&random, sizeof(random), &ouputLen);
return random;
}
otError otPlatEntropyGet(uint8_t *aOutput, uint16_t aOutputLength)
{
otError error = OT_ERROR_NONE;
otError error = OT_ERROR_NONE;
size_t outputLen = 0;
otEXPECT_ACTION(aOutput, error = OT_ERROR_INVALID_ARGS);
for (uint16_t length = 0; length < aOutputLength; length++)
for (size_t partialLen = 0; outputLen < aOutputLength; outputLen += partialLen)
{
aOutput[length] = (uint8_t)randomUint32Get();
const uint16_t remaining = aOutputLength - outputLen;
partialLen = 0;
// Non-zero return values for mbedtls_hardware_poll() signify an error has occurred
otEXPECT_ACTION(0 == mbedtls_hardware_poll(NULL, &aOutput[outputLen], remaining, &partialLen),
error = OT_ERROR_FAILED);
otEXPECT_ACTION(partialLen > 0, error = OT_ERROR_FAILED);
}
exit: