From 4c5b8fb6d62fc0428415ca50f797c2e6471172b9 Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Mon, 19 Oct 2020 22:49:19 +0800
Subject: Use Dropbear's random source rather than libtommath's platform

---
 crypto_desc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'crypto_desc.c')

diff --git a/crypto_desc.c b/crypto_desc.c
index 0f946fc..50b63dc 100644
--- a/crypto_desc.c
+++ b/crypto_desc.c
@@ -3,11 +3,18 @@
 #include "crypto_desc.h"
 #include "ltc_prng.h"
 #include "ecc.h"
+#include "dbrandom.h"
 
 #if DROPBEAR_LTC_PRNG
 	int dropbear_ltc_prng = -1;
 #endif
 
+/* Wrapper for libtommath */
+static mp_err dropbear_rand_source(void* out, size_t size) {
+	genrandom((unsigned char*)out, (unsigned int)size);
+	return MP_OKAY;
+}
+
 
 /* Register the compiled in ciphers.
  * This should be run before using any of the ciphers/hashes */
@@ -67,6 +74,8 @@ void crypto_init() {
 	}
 #endif
 
+	mp_rand_source(dropbear_rand_source);
+
 #if DROPBEAR_ECC
 	ltc_mp = ltm_desc;
 	dropbear_ecc_fill_dp();
-- 
cgit v1.2.3