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check: improve logging for TAM issues, fixes #7797

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Thomas Waldmann 2023-09-01 15:00:51 +02:00
parent 270f33b7ed
commit 1338646b9d
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GPG key ID: 243ACFA951F78E01
1 changed files with 6 additions and 1 deletions
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7
src/borg/archive.py
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@ -1999,13 +1999,17 @@ def valid_archive(obj):
# are likely looking at an archive item here, also check the TAM authentication:
try:
archive, verified, _ = self.key.unpack_and_verify_archive(data, force_tam_not_required=False)
except IntegrityError:
except IntegrityError as integrity_error:
# TAM issues - do not accept this archive!
# either somebody is trying to attack us with a fake archive data or
# we have an ancient archive made before TAM was a thing (borg < 1.0.9) **and** this repo
# was not correctly upgraded to borg 1.2.5 (see advisory at top of the changelog).
# borg can't tell the difference, so it has to assume this archive might be an attack
# and drops this archive.
name = archive.get(b"name", b"<unknown>").decode("ascii", "replace")
logger.error("Archive TAM authentication issue for archive %s: %s", name, integrity_error)
logger.error("This archive will *not* be added to the rebuilt manifest! It will be deleted.")
self.error_found = True
continue
# note: if we get here and verified is False, a TAM is not required.
archive = ArchiveItem(internal_dict=archive)
@ -2271,6 +2275,7 @@ def valid_item(obj):
# when upgrading to borg 1.2.5, users are expected to TAM-authenticate all archives they
# trust, so there shouldn't be any without TAM.
logger.error("Archive TAM authentication issue for archive %s: %s", info.name, integrity_error)
logger.error("This archive will be *removed* from the manifest! It will be deleted.")
self.error_found = True
del self.manifest.archives[info.name]
continue