nix/tests/functional/restricted.sh
2024-11-19 18:03:31 +01:00

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#!/usr/bin/env bash
source common.sh
clearStoreIfPossible
nix-instantiate --restrict-eval --eval -E '1 + 2'
(! nix-instantiate --eval --restrict-eval ./restricted.nix)
(! nix-instantiate --eval --restrict-eval <(echo '1 + 2'))
mkdir -p "$TEST_ROOT/nix"
cp ./simple.nix "$TEST_ROOT/nix"
cp ./simple.builder.sh "$TEST_ROOT/nix"
cp "${config_nix}" "$TEST_ROOT/nix"
cd "$TEST_ROOT/nix"
nix-instantiate --restrict-eval ./simple.nix -I src=.
nix-instantiate --restrict-eval ./simple.nix -I src1=./simple.nix -I src2=./config.nix -I src3=./simple.builder.sh
# no default NIX_PATH
(unset NIX_PATH; ! nix-instantiate --restrict-eval --find-file .)
(! nix-instantiate --restrict-eval --eval -E 'builtins.readFile ./simple.nix')
nix-instantiate --restrict-eval --eval -E 'builtins.readFile ./simple.nix' -I src=../..
expectStderr 1 nix-instantiate --restrict-eval --eval -E 'let __nixPath = [ { prefix = "foo"; path = ./.; } ]; in builtins.readFile <foo/simple.nix>' | grepQuiet "was not found in the Nix search path"
nix-instantiate --restrict-eval --eval -E 'let __nixPath = [ { prefix = "foo"; path = ./.; } ]; in builtins.readFile <foo/simple.nix>' -I src=.
p=$(nix eval --raw --expr "builtins.fetchurl file://${_NIX_TEST_SOURCE_DIR}/restricted.sh" --impure --restrict-eval --allowed-uris "file://${_NIX_TEST_SOURCE_DIR}")
cmp "$p" "${_NIX_TEST_SOURCE_DIR}/restricted.sh"
(! nix eval --raw --expr "builtins.fetchurl file://${_NIX_TEST_SOURCE_DIR}/restricted.sh" --impure --restrict-eval)
(! nix eval --raw --expr "builtins.fetchurl file://${_NIX_TEST_SOURCE_DIR}/restricted.sh" --impure --restrict-eval --allowed-uris "file://${_NIX_TEST_SOURCE_DIR}/restricted.sh/")
nix eval --raw --expr "builtins.fetchurl file://${_NIX_TEST_SOURCE_DIR}/restricted.sh" --impure --restrict-eval --allowed-uris "file://${_NIX_TEST_SOURCE_DIR}/restricted.sh"
(! nix eval --raw --expr "builtins.fetchurl https://github.com/NixOS/patchelf/archive/master.tar.gz" --impure --restrict-eval)
(! nix eval --raw --expr "builtins.fetchTarball https://github.com/NixOS/patchelf/archive/master.tar.gz" --impure --restrict-eval)
(! nix eval --raw --expr "fetchGit git://github.com/NixOS/patchelf.git" --impure --restrict-eval)
ln -sfn "${_NIX_TEST_SOURCE_DIR}/restricted.nix" "$TEST_ROOT/restricted.nix"
[[ $(nix-instantiate --eval $TEST_ROOT/restricted.nix) == 3 ]]
(! nix-instantiate --eval --restrict-eval $TEST_ROOT/restricted.nix)
(! nix-instantiate --eval --restrict-eval $TEST_ROOT/restricted.nix -I $TEST_ROOT)
(! nix-instantiate --eval --restrict-eval $TEST_ROOT/restricted.nix -I .)
nix-instantiate --eval --restrict-eval "$TEST_ROOT/restricted.nix" -I "$TEST_ROOT" -I "${_NIX_TEST_SOURCE_DIR}"
[[ $(nix eval --raw --impure --restrict-eval -I . --expr 'builtins.readFile "${import ./simple.nix}/hello"') == 'Hello World!' ]]
# Check that we can't follow a symlink outside of the allowed paths.
mkdir -p $TEST_ROOT/tunnel.d $TEST_ROOT/foo2
ln -sfn .. $TEST_ROOT/tunnel.d/tunnel
echo foo > $TEST_ROOT/bar
expectStderr 1 nix-instantiate --restrict-eval --eval -E "let __nixPath = [ { prefix = \"foo\"; path = $TEST_ROOT/tunnel.d; } ]; in builtins.readFile <foo/tunnel/bar>" -I $TEST_ROOT/tunnel.d | grepQuiet "forbidden in restricted mode"
expectStderr 1 nix-instantiate --restrict-eval --eval -E "let __nixPath = [ { prefix = \"foo\"; path = $TEST_ROOT/tunnel.d; } ]; in builtins.readDir <foo/tunnel/foo2>" -I $TEST_ROOT/tunnel.d | grepQuiet "forbidden in restricted mode"
# Reading the parents of allowed paths should show only the ancestors of the allowed paths.
[[ $(nix-instantiate --restrict-eval --eval -E "let __nixPath = [ { prefix = \"foo\"; path = $TEST_ROOT/tunnel.d; } ]; in builtins.readDir <foo/tunnel>" -I $TEST_ROOT/tunnel.d) == '{ "tunnel.d" = "directory"; }' ]]
# Check whether we can leak symlink information through directory traversal.
traverseDir="${_NIX_TEST_SOURCE_DIR}/restricted-traverse-me"
ln -sfn "${_NIX_TEST_SOURCE_DIR}/restricted-secret" "${_NIX_TEST_SOURCE_DIR}/restricted-innocent"
mkdir -p "$traverseDir"
goUp="..$(echo "$traverseDir" | sed -e 's,[^/]\+,..,g')"
output="$(nix eval --raw --restrict-eval -I "$traverseDir" \
--expr "builtins.readFile \"$traverseDir/$goUp${_NIX_TEST_SOURCE_DIR}/restricted-innocent\"" \
2>&1 || :)"
echo "$output" | grep "is forbidden"
echo "$output" | grepInverse -F restricted-secret
expectStderr 1 nix-instantiate --restrict-eval true ./dependencies.nix | grepQuiet "forbidden in restricted mode"