Topic: Creating TRNG with Renesas RX65 TSIP
Hello,
I am trying to create a true random number. By looking at these sites it should be possible when i have a Renesas RX65 with TSIP.
https://www.wolfssl.com/true-random-vs- … eneration/
https://www.wolfssl.com/docs/wolfssl-renesas-tsip/
Do you have any documentation/example code ?
Currently i am using this code by calling "wc_InitRng" but it this the proper way? and do i need to call wc_RNG_GenerateBlock also ? Because this site says that "wc_RNG_GenerateBlock " create pseudorandom and i want to make TRNG: https://www.wolfssl.com/doxygen/group__ … 743020f83c ("Copies a sz bytes of pseudorandom data to output. Will reseed rng if needed (blocking). ")
#elif defined(WOLFSSL_RENESAS_TSIP)
#if defined(WOLFSSL_RENESA_TSIP_IAREWRX)
#include "r_bsp/mcu/all/r_rx_compiler.h"
#endif
#include "r_bsp/platform.h"
#include "r_tsip_rx_if.h"
int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
{
int ret = 0;
word32 buffer[4];
while (sz > 0) {
word32 len = sizeof(buffer);
if (sz < len) {
len = sz;
}
/* return 4 words random number*/
ret = R_TSIP_GenerateRandomNumber(buffer);
if(ret == TSIP_SUCCESS) {
XMEMCPY(output, &buffer, len);
output += len;
sz -= len;
} else
return ret;
}
return ret;
}BR