README
1These testcases test the Integrity Measurement Architecture(IMA).
2
3Requirements
4------------
5
6A kernel with IMA configured, mount with i_version support, openssl
7and openssl-devel packages, and auditd, if enabled, with the integrity
8patch, are required to build and run the IMA testsuite.
9
10- Enabling IMA in .config will also enable CRYPTO, SECURITYFS, TCG_TPM,
11 and TPM_TIS.
12
13CONFIG_IMA=y
14CONFIG_IMA_MEASURE_PCR_IDX=10
15CONFIG_IMA_AUDIT=y
16CONFIG_IMA_LSM_RULES=y
17
18- Both sysfs and securityfs if not mounted, will be mounted.
19
20- The testsuite must be executed with root priveleges so that it
21 can access securityfs files, such as: security/ima/policy and
22 security/ima/ascii_runtime_measurement.
23
24- Both openssl and openssl-devel must be installed, to build the
25 testsuite. At runtime, if openssl is not installed, many of the
26 tests will skipped.
27
28- auditd, if enabled, requires the integrity patch, which is available
29 from https://www.redhat.com/archives/linux-audit/2009-March/msg00016.html.
30
31- In order to re-measure a file after it changes, the file system must
32 be mounted with i_version support(Bugzilla 471593).
33 [util-linux-ng-2.14.2-2.fc11.src.rpm]
34
35 Add 'iversion' in /etc/fstab as:
36 dev/hdb1 /home ext2 defaults,iversion 1 2
37
38 To mount the root partition with i_version support, 'iversion' must
39 be added on the remount line in /etc/rc.sysinit:
40 # Remount the root filesystem read-write.
41 update_boot_stage RCmountfs
42 if remount_needed ; then
43 action $"Remounting root filesystem in read-write mode: " mount -n -o remount,rw,iversion /
44 fi
45
46
47Dependency
48----------
49The testsuite is dependent on the default TCB policy being enabled, which
50measures all executables, all files mmapped for execute and all files
51open for read by root. For kernels 2.6.31 and greater, enable the
52trusted computing base(TCB) policy using the ima_tcb=1 boot parameter.
53If the TCB policy has been replaced, loading another measurement
54policy will fail, as the policy may only be replaced once per boot.
55Some of the policy dependency tests might also fail as well.
56
57ima_tpm.sh: test02, verifying the PCR-10 value, requires a hard reboot.
58[On Ubuntu, before running the ltp tests, disable /etc/init.d/kexec-load
59and reboot.]
60
61Run tests
62---------
63After doing 'make' and 'make install' from the top-level,
64- execute './ltp-full-<version>/runltp -f ima' to run the entire testsuite.
65- To run individual tests, cd into the IMA directory, and add testcases/bin
66 to PATH:
67 ./ltp-full-<version>/testcases/kernel/security/integrity/ima/tests/
68 and execute the individual scripts.
69
70System State after running the Testsuite
71----------------------------------------
72After running the testsuite, the default measurement policy has been
73replaced with an identical policy. If you want to install a different
74policy, such as an LSM specific one, a reboot is required.
75
76More Info to look at
77--------------------
78http://linux-ima.sourceforge.net/ is a good place to start.
79There's also IMA mailing lists
80http://sourceforge.net/projects/linux-ima
81--
82