From e02671f1de02798ea4596becfb32ce37d5e3b6a3 Mon Sep 17 00:00:00 2001
From: koalo <koalo@koalo.de>
Date: Wed, 21 Aug 2019 00:18:05 +0200
Subject: [PATCH] feat(pycardium): Seed urandom with TRNG
---
pycardium/mpconfigport.h | 4 ++++
pycardium/mphalport.c | 11 +++++++++++
2 files changed, 15 insertions(+)
diff --git a/pycardium/mpconfigport.h b/pycardium/mpconfigport.h
index d6affbd4..a1c88a74 100644
--- a/pycardium/mpconfigport.h
+++ b/pycardium/mpconfigport.h
@@ -23,6 +23,9 @@
#define MICROPY_ENABLE_SOURCE_LINE (1)
+/* urandom init */
+int mp_hal_trng_read_int(void);
+
/* Builtin function and modules */
#define MICROPY_PY_ALL_SPECIAL_METHODS (1)
#define MICROPY_PY_BUILTINS_HELP (1)
@@ -32,6 +35,7 @@
#define MICROPY_PY_UJSON (1)
#define MICROPY_PY_URANDOM (1)
#define MICROPY_PY_URANDOM_EXTRA_FUNCS (1)
+#define MICROPY_PY_URANDOM_SEED_INIT_FUNC (mp_hal_trng_read_int())
#define MICROPY_PY_URE (1)
#define MICROPY_PY_URE_MATCH_GROUPS (1)
#define MICROPY_PY_URE_MATCH_SPAN_START_END (1)
diff --git a/pycardium/mphalport.c b/pycardium/mphalport.c
index 1fa75b64..60cd9df0 100644
--- a/pycardium/mphalport.c
+++ b/pycardium/mphalport.c
@@ -152,3 +152,14 @@ void NORETURN nlr_jump_fail(void *val)
Reset_Handler();
}
+
+/******************************************************************************
+ * TRNG
+ */
+
+int mp_hal_trng_read_int(void)
+{
+ int result;
+ epic_trng_read((uint8_t *)&result, sizeof(result));
+ return result;
+}
--
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