tree 5fc6403113d02cecc57ec7b1f35f1f5a7603bd73
parent 9b8425a7cdaa40b4c2ca26cec973e54c42eddea2
author Eric Biggers <ebiggers@google.com> 1563812783 -0700
committer Jaegeuk Kim <jaegeuk@kernel.org> 1569273116 -0700

fs-verity: support builtin file signatures

To meet some users' needs, add optional support for having fs-verity
handle a portion of the authentication policy in the kernel.  An
".fs-verity" keyring is created to which X.509 certificates can be
added; then a sysctl 'fs.verity.require_signatures' can be set to cause
the kernel to enforce that all fs-verity files contain a signature of
their file measurement by a key in this keyring.

See the "Built-in signature verification" section of
Documentation/filesystems/fsverity.rst for the full documentation.

Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>