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lix/tests/binary-cache.sh

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source common.sh
clearStore
clearManifests
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clearCache
# Create the binary cache.
outPath=$(nix-build dependencies.nix --no-out-link)
nix-push --dest $cacheDir $outPath
# By default, a binary cache doesn't support "nix-env -qas", but does
# support installation.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
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export _NIX_CACHE_FILE_URLS=1
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nix-env --option binary-caches "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "---"
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nix-store --option binary-caches "file://$cacheDir" -r $outPath
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[ -x $outPath/program ]
# But with the right configuration, "nix-env -qas" should also work.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
echo "WantMassQuery: 1" >> $cacheDir/nix-cache-info
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nix-env --option binary-caches "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "--S"
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x=$(nix-env -f dependencies.nix -qas \* --prebuilt-only)
[ -z "$x" ]
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nix-store --option binary-caches "file://$cacheDir" -r $outPath
nix-store --check-validity $outPath
nix-store -qR $outPath | grep input-2
# Test whether Nix notices if the NAR doesn't match the hash in the NAR info.
clearStore
nar=$(ls $cacheDir/*.nar.xz | head -n1)
mv $nar $nar.good
mkdir -p $TEST_ROOT/empty
nix-store --dump $TEST_ROOT/empty | xz > $nar
nix-build --option binary-caches "file://$cacheDir" dependencies.nix -o $TEST_ROOT/result 2>&1 | tee $TEST_ROOT/log
grep -q "hash mismatch in downloaded path" $TEST_ROOT/log
mv $nar.good $nar
Support cryptographically signed binary caches NAR info files in binary caches can now have a cryptographic signature that Nix will verify before using the corresponding NAR file. To create a private/public key pair for signing and verifying a binary cache, do: $ openssl genrsa -out ./cache-key.sec 2048 $ openssl rsa -in ./cache-key.sec -pubout > ./cache-key.pub You should also come up with a symbolic name for the key, such as "cache.example.org-1". This will be used by clients to look up the public key. (It's a good idea to number keys, in case you ever need to revoke/replace one.) To create a binary cache signed with the private key: $ nix-push --dest /path/to/binary-cache --key ./cache-key.sec --key-name cache.example.org-1 The public key (cache-key.pub) should be distributed to the clients. They should have a nix.conf should contain something like: signed-binary-caches = * binary-cache-public-key-cache.example.org-1 = /path/to/cache-key.pub If all works well, then if Nix fetches something from the signed binary cache, you will see a message like: *** Downloading ‘http://cache.example.org/nar/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’ (signed by ‘cache.example.org-1’) to ‘/nix/store/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’... On the other hand, if the signature is wrong, you get a message like NAR info file `http://cache.example.org/7dppcj5sc1nda7l54rjc0g5l1hamj09j.narinfo' has an invalid signature; ignoring Signatures are implemented as a single line appended to the NAR info file, which looks like this: Signature: 1;cache.example.org-1;HQ9Xzyanq9iV...muQ== Thus the signature has 3 fields: a version (currently "1"), the ID of key, and the base64-encoded signature of the SHA-256 hash of the contents of the NAR info file up to but not including the Signature line. Issue #75.
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# Test whether this unsigned cache is rejected if the user requires signed caches.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
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if nix-store --option binary-caches "file://$cacheDir" --option signed-binary-caches '*' -r $outPath; then
echo "unsigned binary cache incorrectly accepted"
exit 1
fi
Support cryptographically signed binary caches NAR info files in binary caches can now have a cryptographic signature that Nix will verify before using the corresponding NAR file. To create a private/public key pair for signing and verifying a binary cache, do: $ openssl genrsa -out ./cache-key.sec 2048 $ openssl rsa -in ./cache-key.sec -pubout > ./cache-key.pub You should also come up with a symbolic name for the key, such as "cache.example.org-1". This will be used by clients to look up the public key. (It's a good idea to number keys, in case you ever need to revoke/replace one.) To create a binary cache signed with the private key: $ nix-push --dest /path/to/binary-cache --key ./cache-key.sec --key-name cache.example.org-1 The public key (cache-key.pub) should be distributed to the clients. They should have a nix.conf should contain something like: signed-binary-caches = * binary-cache-public-key-cache.example.org-1 = /path/to/cache-key.pub If all works well, then if Nix fetches something from the signed binary cache, you will see a message like: *** Downloading ‘http://cache.example.org/nar/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’ (signed by ‘cache.example.org-1’) to ‘/nix/store/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’... On the other hand, if the signature is wrong, you get a message like NAR info file `http://cache.example.org/7dppcj5sc1nda7l54rjc0g5l1hamj09j.narinfo' has an invalid signature; ignoring Signatures are implemented as a single line appended to the NAR info file, which looks like this: Signature: 1;cache.example.org-1;HQ9Xzyanq9iV...muQ== Thus the signature has 3 fields: a version (currently "1"), the ID of key, and the base64-encoded signature of the SHA-256 hash of the contents of the NAR info file up to but not including the Signature line. Issue #75.
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# Test whether fallback works if we have cached info but the
# corresponding NAR has disappeared.
clearStore
nix-build --option binary-caches "file://$cacheDir" dependencies.nix --dry-run # get info
mkdir $cacheDir/tmp
mv $cacheDir/*.nar* $cacheDir/tmp/
NIX_DEBUG_SUBST=1 nix-build --option binary-caches "file://$cacheDir" dependencies.nix -o $TEST_ROOT/result --fallback
mv $cacheDir/tmp/* $cacheDir/
# Test whether building works if the binary cache contains an
# incomplete closure.
clearStore
rm $(grep -l "StorePath:.*dependencies-input-2" $cacheDir/*.narinfo)
nix-build --option binary-caches "file://$cacheDir" dependencies.nix -o $TEST_ROOT/result 2>&1 | tee $TEST_ROOT/log
grep -q "Downloading" $TEST_ROOT/log
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if [ -n "$HAVE_SODIUM" ]; then
# Create a signed binary cache.
clearCache
declare -a res=($(nix-store --generate-binary-cache-key test.nixos.org-1 $TEST_ROOT/sk1 $TEST_ROOT/pk1 ))
publicKey="$(cat $TEST_ROOT/pk1)"
res=($(nix-store --generate-binary-cache-key test.nixos.org-1 $TEST_ROOT/sk2 $TEST_ROOT/pk2))
badKey="$(cat $TEST_ROOT/pk2)"
res=($(nix-store --generate-binary-cache-key foo.nixos.org-1 $TEST_ROOT/sk3 $TEST_ROOT/pk3))
otherKey="$(cat $TEST_ROOT/pk3)"
nix-push --dest $cacheDir --key-file $TEST_ROOT/sk1 $outPath
# Downloading should fail if we don't provide a key.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
(! nix-store -r $outPath --option binary-caches "file://$cacheDir" --option signed-binary-caches '*' )
# And it should fail if we provide an incorrect key.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
(! nix-store -r $outPath --option binary-caches "file://$cacheDir" --option signed-binary-caches '*' --option binary-cache-public-keys "$badKey")
# It should succeed if we provide the correct key.
nix-store -r $outPath --option binary-caches "file://$cacheDir" --option signed-binary-caches '*' --option binary-cache-public-keys "$otherKey $publicKey"
# It should fail if we corrupt the .narinfo.
clearStore
for i in $cacheDir/*.narinfo; do
grep -v References $i > $i.tmp
mv $i.tmp $i
done
rm -f $NIX_STATE_DIR/binary-cache*
(! nix-store -r $outPath --option binary-caches "file://$cacheDir" --option signed-binary-caches '*' --option binary-cache-public-keys "$publicKey")
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fi # HAVE_LIBSODIUM