From 1acea95ced239ae9329c0fbbc66dff8e1ad7a89e Mon Sep 17 00:00:00 2001
From: Jeff Becker <jeff@i2p.rocks>
Date: Thu, 18 Mar 2021 17:36:53 -0400
Subject: [PATCH] fix issue #1562

* use csrng for std::shuffle
---
 llarp/router/rc_lookup_handler.cpp | 3 +--
 llarp/service/outbound_context.cpp | 4 +---
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/llarp/router/rc_lookup_handler.cpp b/llarp/router/rc_lookup_handler.cpp
index bb1e02e1d..12b8b1beb 100644
--- a/llarp/router/rc_lookup_handler.cpp
+++ b/llarp/router/rc_lookup_handler.cpp
@@ -270,8 +270,7 @@ namespace llarp
 
       if (lookupRouters.size() > LookupPerTick)
       {
-        static std::mt19937_64 rng{llarp::randint()};
-        std::shuffle(lookupRouters.begin(), lookupRouters.end(), rng);
+        std::shuffle(lookupRouters.begin(), lookupRouters.end(), CSRNG{});
         lookupRouters.resize(LookupPerTick);
       }
 
diff --git a/llarp/service/outbound_context.cpp b/llarp/service/outbound_context.cpp
index 28370f042..86369bddb 100644
--- a/llarp/service/outbound_context.cpp
+++ b/llarp/service/outbound_context.cpp
@@ -410,9 +410,7 @@ namespace llarp
       std::vector<Introduction> intros = currentIntroSet.I;
       if (intros.size() > 1)
       {
-        std::random_device rd;
-        std::mt19937 g(rd());
-        std::shuffle(intros.begin(), intros.end(), g);
+        std::shuffle(intros.begin(), intros.end(), CSRNG{});
       }
 
       // to find a intro on the same router as before that is newer