From 462c86f8f897448e45fa8b2e21a25c04d5c7dafd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Joachim=20Stro=CC=88mbergson?= Date: Tue, 11 Dec 2018 14:40:28 +0100 Subject: Zeroisation of wrapper key registers. Adding reset of key_loaded register. --- src/rtl/keywrap.v | 6 ++++++ src/rtl/keywrap_core.v | 2 ++ 2 files changed, 8 insertions(+) (limited to 'src/rtl') diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v index 02c20fc..36e95bf 100644 --- a/src/rtl/keywrap.v +++ b/src/rtl/keywrap.v @@ -270,6 +270,12 @@ module keywrap #(parameter ADDR_BITS = 13) if (a1_we) a1_reg <= write_data; + if (zeroise_reg) + begin + for (i = 0 ; i < 8 ; i = i + 1) + key_reg[i] <= 32'h0; + end + if (key_we) key_reg[address[2 : 0]] <= write_data; diff --git a/src/rtl/keywrap_core.v b/src/rtl/keywrap_core.v index 41ad531..5d628e2 100644 --- a/src/rtl/keywrap_core.v +++ b/src/rtl/keywrap_core.v @@ -626,6 +626,8 @@ module keywrap_core #(parameter MEM_BITS = 11) zero_key = 1'h1; if (aes_ready) begin + key_loaded_new = 1'h0; + key_loaded_we = 1'h1; ready_new = 1'h1; ready_we = 1'h1; keywrap_core_ctrl_new = CTRL_IDLE; -- cgit v1.2.3