linux/scripts/gen-randstruct-seed.sh

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0

SEED=$(od -A n -t x8 -N 32 /dev/urandom | tr -d ' \n')
echo "$SEED" > "$1"
HASH=$(echo -n "$SEED" | sha256sum | cut -d" " -f1)
echo "#define RANDSTRUCT_HASHED_SEED \"$HASH\"" > "$2"
randstruct: Move seed generation into scripts/basic/ To enable Clang randstruct support, move the structure layout randomization seed generation out of scripts/gcc-plugins/ into scripts/basic/ so it happens early enough that it can be used by either compiler implementation. The gcc-plugin still builds its own header file, but now does so from the common "randstruct.seed" file. Cc: linux-hardening@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220503205503.3054173-6-keescook@chromium.org 2022-05-03 20:55:02 +00:00			`#!/bin/sh`
			`# SPDX-License-Identifier: GPL-2.0`

			`SEED=$(od -A n -t x8 -N 32 /dev/urandom \| tr -d ' \n')`
			`echo "$SEED" > "$1"`
			`HASH=$(echo -n "$SEED" \| sha256sum \| cut -d" " -f1)`
			`echo "#define RANDSTRUCT_HASHED_SEED \"$HASH\"" > "$2"`