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ca87601dd9
Fixes a bug whereby authentication of a commit *not* descending from the
introductory commit could succeed, provided the commit verifies the
authorization invariant.
In the example below, A is a common ancestor of the introductory commit
I and of commit X. Authentication of X would succeed, even though it is
not a descendant of I, as long as X is authorized according to the
'.guix-authorizations' in A:
X I
\ /
A
This is because, 'authenticate-repository' would not check whether X
descends from I, and the call (commit-difference X I) would return X.
In practice that only affects forks because it means that ancestors of
the introductory commit already contain a '.guix-authorizations' file.
* guix/git-authenticate.scm (authenticate-repository): Add call to
'commit-descendant?'.
* tests/channels.scm ("authenticate-channel, not a descendant of introductory commit"):
New test.
* tests/git-authenticate.scm ("authenticate-repository, target not a descendant of intro"):
New test.
* tests/guix-git-authenticate.sh: Expect earlier test to fail since
9549f0283a is not a descendant of
$intro_commit. Add new test targeting an ancestor of the introductory
commit, and another test targeting the v1.2.0 commit.
* doc/guix.texi (Specifying Channel Authorizations): Add a sentence.
68 lines
2.7 KiB
Bash
68 lines
2.7 KiB
Bash
# GNU Guix --- Functional package management for GNU
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# Copyright © 2020, 2022 Ludovic Courtès <ludo@gnu.org>
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#
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# This file is part of GNU Guix.
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#
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# GNU Guix is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or (at
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# your option) any later version.
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#
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# GNU Guix is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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#
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# Test the 'guix git authenticate' command-line utility.
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#
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# Skip if we're not in a Git checkout.
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[ -d "$abs_top_srcdir/.git" ] || exit 77
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# Skip if there's no 'keyring' branch.
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guile -c '(use-modules (git))
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(member "refs/heads/keyring" (branch-list (repository-open ".")))' || \
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exit 77
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# Keep in sync with '%default-channels' in (guix channels)!
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intro_commit="9edb3f66fd807b096b48283debdcddccfea34bad"
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intro_signer="BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA"
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cache_key="test-$$"
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# This must fail because the end commit is not a descendant of $intro_commit.
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! guix git authenticate "$intro_commit" "$intro_signer" \
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--cache-key="$cache_key" --stats \
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--end=9549f0283a78fe36f2d4ff2a04ef8ad6b0c02604
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# The v1.2.0 commit is a descendant of $intro_commit and it satisfies the
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# authorization invariant.
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v1_2_0_commit="a099685659b4bfa6b3218f84953cbb7ff9e88063"
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guix git authenticate "$intro_commit" "$intro_signer" \
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--cache-key="$cache_key" --stats \
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--end="$v1_2_0_commit"
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rm "$XDG_CACHE_HOME/guix/authentication/$cache_key"
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# Commit and signer of the 'v1.0.0' tag.
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v1_0_0_commit="6298c3ffd9654d3231a6f25390b056483e8f407c"
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v1_0_0_signer="3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5" # civodul
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v1_0_1_commit="d68de958b60426798ed62797ff7c96c327a672ac"
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# This should succeed because v1.0.0 is an ancestor of $intro_commit.
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guix git authenticate "$intro_commit" "$intro_signer" \
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--cache-key="$cache_key" --stats \
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--end="$v1_0_0_commit"
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# This should fail because these commits lack '.guix-authorizations'.
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! guix git authenticate "$v1_0_0_commit" "$v1_0_0_signer" \
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--cache-key="$cache_key" --end="$v1_0_1_commit"
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# This should work thanks to '--historical-authorizations'.
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guix git authenticate "$v1_0_0_commit" "$v1_0_0_signer" \
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--cache-key="$cache_key" --end="$v1_0_1_commit" --stats \
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--historical-authorizations="$abs_top_srcdir/etc/historical-authorizations"
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