From 13f69440ac7cca05a94bd9cf9011e2ea352dad68 Mon Sep 17 00:00:00 2001 From: Gabriel Kihlman Date: Mon, 27 Apr 2020 14:56:00 +0200 Subject: [PATCH] Wipe stack memory containing key material before returning --- ykpers.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/ykpers.c b/ykpers.c index 81cb0df..2413b35 100644 --- a/ykpers.c +++ b/ykpers.c @@ -280,6 +280,7 @@ int ykp_AES_key_from_hex(YKP_CONFIG *cfg, const char *hexkey) { yubikey_hex_decode(aesbin, hexkey, sizeof(aesbin)); memcpy(cfg->ykcore_config.key, aesbin, sizeof(cfg->ykcore_config.key)); + insecure_memzero (aesbin, sizeof(aesbin)); return 0; } @@ -330,6 +331,7 @@ int ykp_HMAC_key_from_hex(YKP_CONFIG *cfg, const char *hexkey) { i = sizeof(cfg->ykcore_config.key); memcpy(cfg->ykcore_config.key, aesbin, i); memcpy(cfg->ykcore_config.uid, aesbin + i, 20 - i); + insecure_memzero (aesbin, sizeof(aesbin)); return 0; }