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lix/tests/substitute-with-invalid-ca.sh
regnat 5985b8b527 Check the CA hash when importing stuff in the local store
When adding a path to the local store (via `LocalStore::addToStore`),
ensure that the `ca` field of the provided `ValidPathInfo` does indeed
correspond to the content of the path.
Otherwise any untrusted user (or any binary cache) can add arbitrary
content-addressed paths to the store (as content-addressed paths don’t
need a signature).
2021-06-01 15:09:24 +02:00

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source common.sh
BINARY_CACHE=file://$cacheDir
getHash() {
basename "$1" | cut -d '-' -f 1
}
getRemoteNarInfo () {
echo "$cacheDir/$(getHash "$1").narinfo"
}
cat <<EOF > $TEST_HOME/good.txt
Im a good path
EOF
cat <<EOF > $TEST_HOME/bad.txt
Im a bad path
EOF
good=$(nix-store --add $TEST_HOME/good.txt)
bad=$(nix-store --add $TEST_HOME/bad.txt)
nix copy --to "$BINARY_CACHE" "$good"
nix copy --to "$BINARY_CACHE" "$bad"
nix-collect-garbage >/dev/null 2>&1
# Falsifying the narinfo file for '$good'
goodPathNarInfo=$(getRemoteNarInfo "$good")
badPathNarInfo=$(getRemoteNarInfo "$bad")
for fieldName in URL FileHash FileSize NarHash NarSize; do
sed -i "/^$fieldName/d" "$goodPathNarInfo"
grep -E "^$fieldName" "$badPathNarInfo" >> "$goodPathNarInfo"
done
# Copying back '$good' from the binary cache. This should fail as it is
# corrupted
if nix copy --from "$BINARY_CACHE" "$good"; then
fail "Importing a path with a wrong CA field should fail"
fi