In addition to verifying the published releases with the `pub` command,
the verifybinaries script is updated to take a `bin` command where the
user specifies the local files, sums, and sigs to verify.
This commit adds the functionality necessary to transition from
doing binary verification on the basis of a single signature to
requiring a minimum threshold of trusted signatures.
A signature can appear as "good" from GPG output, but it may not come
from an identity the user trusts. We call these "good, untrusted"
signatures.
We report bad signatures but do not necessarily fail in their presence,
since a bad signature might coexist with enough good, trusted signatures
to fulfill our criteria.
If "--import-keys" is enabled, we will prompt the user to
optionally try to retrieve unknown keys. Marking them as trusted locally
is a WIP, but keys which are retrieved successfully and appear on the
builder-keys list will immediately count as being useful towards
fulfilling the threshold.
Logging is improved and an option to output JSON that summarizes the
whole sum signature and binary verification processes has been added.
Co-authored-by: Russ Yanofsky <russ@yanofsky.org>
Co-authored-by: willcl-ark <will8clark@gmail.com>
1ac454a384 Enable ShellCheck rules (Hennadii Stepanov)
Pull request description:
Enable some simple ShellCheck rules.
Note for reviewers: `bash` and `shellcheck` on macOS are different from ones on Ubuntu.
For local tests the latest `shellcheck` version 0.6.0 should be used (see #15166).
ACKs for top commit:
practicalswift:
utACK 1ac454a384
dongcarl:
utACK 1ac454a
fanquake:
ACK 1ac454a384
Tree-SHA512: 8d0a3a5c09fe1a0c22120178f5e6b80f81f746f8c3356b7701ff301c117acb2edea8fe08f08fb54ed73f94b1617515fb239fa28e7ab4121f74872e6494b6f20e
Downloading all the binaries of all platforms can take quite long,
especially for slow connections, which may deter people from using
this script and, therefore, to disregard security altogether.
This change introduces the new possibility of specifying the
platform along with the version number, so that only the binaries
that contain the platform name are downloaded.
