diff options
| author | Kees Cook <keescook@chromium.org> | 2022-05-03 13:55:02 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-05-08 01:33:07 -0700 |
| commit | be2b34fa9be31c60a95989f984c9a5d40cd781b6 (patch) | |
| tree | a1b5f247ac20de2866d52ea68930b47268366efc /scripts/gen-randstruct-seed.sh | |
| parent | 613f4b3ed7902d1dbbc6ade6401e452a63dfbc21 (diff) | |
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
Diffstat (limited to 'scripts/gen-randstruct-seed.sh')
| -rwxr-xr-x | scripts/gen-randstruct-seed.sh | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/scripts/gen-randstruct-seed.sh b/scripts/gen-randstruct-seed.sh new file mode 100755 index 000000000000..61017b36c464 --- /dev/null +++ b/scripts/gen-randstruct-seed.sh @@ -0,0 +1,7 @@ +#!/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" |