ima: define a new template field named 'd-ngv2' and templates

In preparation to differentiate between unsigned regular IMA file
hashes and fs-verity's file digests in the IMA measurement list,
define a new template field named 'd-ngv2'.

Also define two new templates named 'ima-ngv2' and 'ima-sigv2', which
include the new 'd-ngv2' field.

Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/security/IMA-templates.rst b/Documentation/security/IMA-templates.rst
index cab97f49971d..eafc4e34f890 100644
--- a/Documentation/security/IMA-templates.rst
+++ b/Documentation/security/IMA-templates.rst
@@ -67,6 +67,8 @@ descriptors by adding their identifier to the format string
  - 'n': the name of the event (i.e. the file name), with size up to 255 bytes;
  - 'd-ng': the digest of the event, calculated with an arbitrary hash
    algorithm (field format: <hash algo>:digest);
+ - 'd-ngv2': same as d-ng, but prefixed with the "ima" digest type
+   (field format: <digest type>:<hash algo>:digest);
  - 'd-modsig': the digest of the event without the appended modsig;
  - 'n-ng': the name of the event, without size limitations;
  - 'sig': the file signature, or the EVM portable signature if the file
@@ -87,7 +89,9 @@ Below, there is the list of defined template descriptors:
 
  - "ima": its format is ``d|n``;
  - "ima-ng" (default): its format is ``d-ng|n-ng``;
+ - "ima-ngv2": its format is ``d-ngv2|n-ng``;
  - "ima-sig": its format is ``d-ng|n-ng|sig``;
+ - "ima-sigv2": its format is ``d-ngv2|n-ng|sig``;
  - "ima-buf": its format is ``d-ng|n-ng|buf``;
  - "ima-modsig": its format is ``d-ng|n-ng|sig|d-modsig|modsig``;
  - "evm-sig": its format is ``d-ng|n-ng|evmsig|xattrnames|xattrlengths|xattrvalues|iuid|igid|imode``;