Date: Sat, 30 Dec 2017 19:57:59 +0200 From: Dan Aloni <dan@...nelim.com> To: linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com Cc: Dan Aloni <dan@...nelim.com> Subject: [PATCH 0/5] RFC: Public key encryption of dmesg by the kernel From: Dan Aloni <dan@...nelim.com> Hi All, There has been a lot of progress in recent times regarding the removal of sensitive information from dmesg (pointers, etc.), so I figured - why not encrypt it all? However, I have not found any existing discussions or references regarding this technical direction. I am not sure that desktop and power users would like to have their kernel message encrypted, but there are scenarios such as in mobile devices, where only the developers, makers of devices, may actually benefit from access to kernel prints messages, and the users may be more protected from exploits. In its present form, it is an RFC, so that before investing more time developing it further, I would receive comments regarding its viability and suggestions for design. Dan Aloni (5): crypto: fix memory leak in rsa-kcs1pad encryption certs: allow in-kernel access of trusted keys kernel/printk: allow kmsg to be encrypted using public key encryption tools: add dmesg decryption program docs: add dmesg encryption doc Documentation/admin-guide/dmesg-encryption.rst | 77 +++++ certs/system_keyring.c | 56 +++- crypto/rsa-pkcs1pad.c | 9 - include/keys/system_keyring.h | 3 + include/uapi/linux/kmsg.h | 18 ++ init/Kconfig | 10 + kernel/printk/printk.c | 422 +++++++++++++++++++++++++ tools/Makefile | 5 +- tools/kmsg/.gitignore | 1 + tools/kmsg/Makefile | 14 + tools/kmsg/dmesg-decipher.c | 316 ++++++++++++++++++ 11 files changed, 920 insertions(+), 11 deletions(-) create mode 100644 Documentation/admin-guide/dmesg-encryption.rst create mode 100644 include/uapi/linux/kmsg.h create mode 100644 tools/kmsg/.gitignore create mode 100644 tools/kmsg/Makefile create mode 100644 tools/kmsg/dmesg-decipher.c -- 2.13.6
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