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authorRoberto Sassu2021-06-03 15:17:05 +0200
committerMimi Zohar2021-06-03 10:02:37 -0400
commit88016de3ab075790e1f1bf047576e9b557c22d19 (patch)
treea524078fa7c6266bc65081f4882217f996b7bc70 /crypto/md5.c
parent8314b6732ae4e600bb933e108f96ce0176acb09c (diff)
ima: Define new template evm-sig
With the recent introduction of the evmsig template field, remote verifiers can obtain the EVM portable signature instead of the IMA signature, to verify file metadata. After introducing the new fields to include file metadata in the measurement list, this patch finally defines the evm-sig template, whose format is: d-ng|n-ng|evmsig|xattrnames|xattrlengths|xattrvalues|iuid|igid|imode xattrnames, xattrlengths and xattrvalues are populated only from defined EVM protected xattrs, i.e. the ones that EVM considers to verify the portable signature. xattrnames and xattrlengths are populated only if the xattr is present. xattrnames and xattrlengths are not necessary for verifying the EVM portable signature, but they are included for completeness of information, if a remote verifier wants to infer more from file metadata. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
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