diff options
Diffstat (limited to 'Documentation/security/Smack.txt')
| -rw-r--r-- | Documentation/security/Smack.txt | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/Documentation/security/Smack.txt b/Documentation/security/Smack.txt index a416479b8a1..b6ef7e9dba3 100644 --- a/Documentation/security/Smack.txt +++ b/Documentation/security/Smack.txt @@ -3,7 +3,7 @@ "Good for you, you've decided to clean the elevator!" - The Elevator, from Dark Star -Smack is the the Simplified Mandatory Access Control Kernel. +Smack is the Simplified Mandatory Access Control Kernel. Smack is a kernel based implementation of mandatory access control that includes simplicity in its primary design goals. @@ -28,12 +28,11 @@ Smack kernels use the CIPSO IP option. Some network configurations are intolerant of IP options and can impede access to systems that use them as Smack does. -The current git repositories for Smack user space are: +The current git repository for Smack user space is: - git@gitorious.org:meego-platform-security/smackutil.git - git@gitorious.org:meego-platform-security/libsmack.git + git://github.com/smack-team/smack.git -These should make and install on most modern distributions. +This should make and install on most modern distributions. There are three commands included in smackutil: smackload - properly formats data for writing to /smack/load @@ -118,6 +117,17 @@ access2 ambient This contains the Smack label applied to unlabeled network packets. +change-rule + This interface allows modification of existing access control rules. + The format accepted on write is: + "%s %s %s %s" + where the first string is the subject label, the second the + object label, the third the access to allow and the fourth the + access to deny. The access strings may contain only the characters + "rwxat-". If a rule for a given subject and object exists it will be + modified by enabling the permissions in the third string and disabling + those in the fourth string. If there is no such rule it will be + created using the access specified in the third and the fourth strings. cipso This interface allows a specific CIPSO header to be assigned to a Smack label. The format accepted on write is: @@ -194,6 +204,19 @@ onlycap these capabilities are effective at for processes with any label. The value is set by writing the desired label to the file or cleared by writing "-" to the file. +ptrace + This is used to define the current ptrace policy + 0 - default: this is the policy that relies on smack access rules. + For the PTRACE_READ a subject needs to have a read access on + object. For the PTRACE_ATTACH a read-write access is required. + 1 - exact: this is the policy that limits PTRACE_ATTACH. Attach is + only allowed when subject's and object's labels are equal. + PTRACE_READ is not affected. Can be overriden with CAP_SYS_PTRACE. + 2 - draconian: this policy behaves like the 'exact' above with an + exception that it can't be overriden with CAP_SYS_PTRACE. +revoke-subject + Writing a Smack label here sets the access to '-' for all access + rules with that subject label. You can add access rules in /etc/smack/accesses. They take the form: |