From 9c2c73c6ccbdd8e1b22fc78255851a807fe845d4 Mon Sep 17 00:00:00 2001
From: Jens Steube <jens.steube@gmail.com>
Date: Fri, 15 Nov 2019 10:12:33 +0100
Subject: [PATCH] Clear hook buffers after full kernel chain is finished

---
 src/backend.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/src/backend.c b/src/backend.c
index 177597943..f29d77723 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -3102,6 +3102,34 @@ int choose_kernel (hashcat_ctx_t *hashcat_ctx, hc_device_param_t *device_param,
         if (run_kernel (hashcat_ctx, device_param, KERN_RUN_3, pws_cnt, false, 0) == -1) return -1;
       }
     }
+
+    /*
+     * maybe we should add this zero of temporary buffers
+     * however it drops the performance from 7055338 to 7010621
+
+    if (device_param->is_cuda == true)
+    {
+      if (run_cuda_kernel_bzero   (hashcat_ctx, device_param, device_param->cuda_d_tmps,   device_param->size_tmps) == -1) return -1;
+    }
+
+    if (device_param->is_opencl == true)
+    {
+      if (run_opencl_kernel_bzero (hashcat_ctx, device_param, device_param->opencl_d_tmps, device_param->size_tmps) == -1) return -1;
+    }
+    */
+
+    if ((hashconfig->opts_type & OPTS_TYPE_HOOK12) || (hashconfig->opts_type & OPTS_TYPE_HOOK23))
+    {
+      if (device_param->is_cuda == true)
+      {
+        if (run_cuda_kernel_bzero   (hashcat_ctx, device_param, device_param->cuda_d_hooks,   device_param->size_hooks) == -1) return -1;
+      }
+
+      if (device_param->is_opencl == true)
+      {
+        if (run_opencl_kernel_bzero (hashcat_ctx, device_param, device_param->opencl_d_hooks, device_param->size_hooks) == -1) return -1;
+      }
+    }
   }
 
   return 0;