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| author | James Morris <jmorris@namei.org> | 2011-08-09 10:31:03 +1000 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-08-09 10:31:03 +1000 |
| commit | 5a2f3a02aea164f4f59c0c3497772090a411b462 (patch) | |
| tree | d3ebe03d4f97575290087843960baa01de3acd0a /Documentation/ABI | |
| parent | 1d568ab068c021672d6cd7f50f92a3695a921ffb (diff) | |
| parent | 817b54aa45db03437c6d09a7693fc6926eb8e822 (diff) | |
Merge branch 'next-evm' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/ima-2.6 into next
Conflicts:
fs/attr.c
Resolve conflict manually.
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/evm | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/evm b/Documentation/ABI/testing/evm new file mode 100644 index 000000000000..8374d4557e5d --- /dev/null +++ b/Documentation/ABI/testing/evm @@ -0,0 +1,23 @@ +What: security/evm +Date: March 2011 +Contact: Mimi Zohar <zohar@us.ibm.com> +Description: + EVM protects a file's security extended attributes(xattrs) + against integrity attacks. The initial method maintains an + HMAC-sha1 value across the extended attributes, storing the + value as the extended attribute 'security.evm'. + + EVM depends on the Kernel Key Retention System to provide it + with a trusted/encrypted key for the HMAC-sha1 operation. + The key is loaded onto the root's keyring using keyctl. Until + EVM receives notification that the key has been successfully + loaded onto the keyring (echo 1 > <securityfs>/evm), EVM + can not create or validate the 'security.evm' xattr, but + returns INTEGRITY_UNKNOWN. Loading the key and signaling EVM + should be done as early as possible. Normally this is done + in the initramfs, which has already been measured as part + of the trusted boot. For more information on creating and + loading existing trusted/encrypted keys, refer to: + Documentation/keys-trusted-encrypted.txt. (A sample dracut + patch, which loads the trusted/encrypted key and enables + EVM, is available from http://linux-ima.sourceforge.net/#EVM.) |