From 5ff4c5af715d098852d124de116d354ee10f4ea4 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Mon, 11 Feb 2019 16:22:00 +0100 Subject: Split most .c files into one per function and flatten file hierarchy MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libkeccak_hmac_wipe.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 libkeccak_hmac_wipe.c (limited to 'libkeccak_hmac_wipe.c') diff --git a/libkeccak_hmac_wipe.c b/libkeccak_hmac_wipe.c new file mode 100644 index 0000000..fd99c48 --- /dev/null +++ b/libkeccak_hmac_wipe.c @@ -0,0 +1,22 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +/** + * Wipe sensitive data wihout freeing any data + * + * @param state The state that should be wipe + */ +void +libkeccak_hmac_wipe(volatile libkeccak_hmac_state_t *restrict state) +{ + volatile char *restrict key_pads; + size_t i, size; + key_pads = state->key_opad; + size = 2 * ((state->key_length + 7) >> 3); + libkeccak_state_wipe(&state->sponge); + for (i = 0; i < size; i++) + key_pads[i] = 0; + state->leftover = 0; + __builtin_memset(state->buffer, 0, state->buffer_size); +} -- cgit v1.2.3-70-g09d2