#!/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}" "$TEST_ROOT/nix"
simple_nix="$TEST_ROOT/nix/simple.nix"
# N.B. redefine
config_nix="$TEST_ROOT/nix/config.nix"
removeBuildDirRef "${simple_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 "forbidden in restricted mode"
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"