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Description of problem:

clevis (tang) in RHEL-8 does not recognize SHA-256 thumbprints when specified via the "thp" configuration option. Instead, it complains that the trusted JWK did not sign the advertisement.

Version-Release number of selected component (if applicable):
clevis-15-14.el8

How reproducible: Always


Steps to Reproduce:
1.Get a SHA-256 thumbprint from a tang server, e.g:

curl TANG_SERVER/adv | jose fmt -j- -g payload -y -o-  |  jose jwk use -i- -r -u verify -o- | jose jwk thp -i- -a S256


2. Try to use this thumbprint with clevis and the tang pin:

echo foo | clevis encrypt tang '{"url": "localhost", "thp": "uJzbiBZ6QYiYfTNiD9h6NZkNi5ZjvY2dgPuGvF0R2hA"}'


Actual results:

Trusted JWK 'uJzbiBZ6QYiYfTNiD9h6NZkNi5ZjvY2dgPuGvF0R2hA' did not sign the advertisement!


Expected results:

It works and the JWE is displayed.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (clevis bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:6971