From fcb9bdf2095f4f39d8ed433e1fb8df4278a4880f Mon Sep 17 00:00:00 2001 From: Scott Powell Date: Fri, 14 Aug 2026 17:46:43 +1000 Subject: [PATCH] * combine radio's entropy with CC310 RNG --- src/helpers/radiolib/RadioLibWrappers.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/helpers/radiolib/RadioLibWrappers.h b/src/helpers/radiolib/RadioLibWrappers.h index 5db1e41f0..77dd93116 100644 --- a/src/helpers/radiolib/RadioLibWrappers.h +++ b/src/helpers/radiolib/RadioLibWrappers.h @@ -92,8 +92,10 @@ public: void random(uint8_t* dest, size_t sz) override { #ifdef USE_CC310_HW_CRYPTO - // CC310 TRNG is higher quality and environment-independent vs radio RSSI noise. nRFCrypto.Random.generate(dest, (uint16_t)sz); + for (int i = 0; i < sz; i++) { + dest[i] ^= _radio->randomByte() ^ (::random(0, 256) & 0xFF); // combine with Radio's entropy + } #else for (int i = 0; i < sz; i++) { dest[i] = _radio->randomByte() ^ (::random(0, 256) & 0xFF);