nix-super/tests/functional/signing.sh

#!/usr/bin/env bash

source common.sh

clearStoreIfPossible
clearCache

nix-store --generate-binary-cache-key cache1.example.org $TEST_ROOT/sk1 $TEST_ROOT/pk1
pk1=$(cat $TEST_ROOT/pk1)
nix-store --generate-binary-cache-key cache2.example.org $TEST_ROOT/sk2 $TEST_ROOT/pk2
pk2=$(cat $TEST_ROOT/pk2)

# Build a path.
outPath=$(nix-build dependencies.nix --no-out-link --secret-key-files "$TEST_ROOT/sk1 $TEST_ROOT/sk2")

# Verify that the path got signed.
info=$(nix path-info --json $outPath)
echo $info | jq -e '.[] | .ultimate == true'
TODO_NixOS # looks like an actual bug? Following line fails on NixOS:
echo $info | jq -e '.[] | .signatures.[] | select(startswith("cache1.example.org"))'
echo $info | jq -e '.[] | .signatures.[] | select(startswith("cache2.example.org"))'

# Test "nix store verify".
nix store verify -r $outPath

expect 2 nix store verify -r $outPath --sigs-needed 1

nix store verify -r $outPath --sigs-needed 1 --trusted-public-keys $pk1

expect 2 nix store verify -r $outPath --sigs-needed 2 --trusted-public-keys $pk1

nix store verify -r $outPath --sigs-needed 2 --trusted-public-keys "$pk1 $pk2"

nix store verify --all --sigs-needed 2 --trusted-public-keys "$pk1 $pk2"

# Build something unsigned.
outPath2=$(nix-build simple.nix --no-out-link)

nix store verify -r $outPath

# Verify that the path did not get signed but does have the ultimate bit.
info=$(nix path-info --json $outPath2)
echo $info | jq -e '.[] | .ultimate == true'
echo $info | jq -e '.[] | .signatures == []'

# Test "nix store verify".
nix store verify -r $outPath2

expect 2 nix store verify -r $outPath2 --sigs-needed 1

expect 2 nix store verify -r $outPath2 --sigs-needed 1 --trusted-public-keys $pk1

# Test "nix store sign".
nix store sign --key-file $TEST_ROOT/sk1 $outPath2

nix store verify -r $outPath2 --sigs-needed 1 --trusted-public-keys $pk1

# Build something content-addressed.
outPathCA=$(IMPURE_VAR1=foo IMPURE_VAR2=bar nix-build ./fixed.nix -A good.0 --no-out-link)

nix path-info --json $outPathCA | jq -e '.[] | .ca | startswith("fixed:md5:")'

# Content-addressed paths don't need signatures, so they verify
# regardless of --sigs-needed.
nix store verify $outPathCA
nix store verify $outPathCA --sigs-needed 1000

# Check that signing a content-addressed path doesn't overflow validSigs
nix store sign --key-file $TEST_ROOT/sk1 $outPathCA
nix store verify -r $outPathCA --sigs-needed 1000 --trusted-public-keys $pk1

# Copy to a binary cache.
nix copy --to file://$cacheDir $outPath2

# Verify that signatures got copied.
info=$(nix path-info --store file://$cacheDir --json $outPath2)
echo $info | jq -e '.[] | .ultimate == false'
echo $info | jq -e '.[] | .signatures.[] | select(startswith("cache1.example.org"))'
echo $info | expect 4 jq -e '.[] | .signatures.[] | select(startswith("cache2.example.org"))'

# Verify that adding a signature to a path in a binary cache works.
nix store sign --store file://$cacheDir --key-file $TEST_ROOT/sk2 $outPath2
info=$(nix path-info --store file://$cacheDir --json $outPath2)
echo $info | jq -e '.[] | .signatures.[] | select(startswith("cache1.example.org"))'
echo $info | jq -e '.[] | .signatures.[] | select(startswith("cache2.example.org"))'

# Copying to a diverted store should fail due to a lack of signatures by trusted keys.
chmod -R u+w $TEST_ROOT/store0 || true
rm -rf $TEST_ROOT/store0

# Fails or very flaky only on GHA + macOS:
#     expectStderr 1 nix copy --to $TEST_ROOT/store0 $outPath | grepQuiet -E 'cannot add path .* because it lacks a signature by a trusted key'
# but this works:
(! nix copy --to $TEST_ROOT/store0 $outPath)

# But succeed if we supply the public keys.
nix copy --to $TEST_ROOT/store0 $outPath --trusted-public-keys $pk1

expect 2 nix store verify --store $TEST_ROOT/store0 -r $outPath

nix store verify --store $TEST_ROOT/store0 -r $outPath --trusted-public-keys $pk1
nix store verify --store $TEST_ROOT/store0 -r $outPath --sigs-needed 2 --trusted-public-keys "$pk1 $pk2"

# It should also succeed if we disable signature checking.
(! nix copy --to $TEST_ROOT/store0 $outPath2)
nix copy --to $TEST_ROOT/store0?require-sigs=false $outPath2

# But signatures should still get copied.
nix store verify --store $TEST_ROOT/store0 -r $outPath2 --trusted-public-keys $pk1

# Content-addressed stuff can be copied without signatures.
nix copy --to $TEST_ROOT/store0 $outPathCA