authfs: FUSE to serve file with fs-verity verification
The filesystem can currently serve local files specified via command
line flags, with verification using manually specified Merkle tree dump.
It also allows regular read without verification.
The change currently only supports local files for debug only. We will
need to add new configuration for remote file access with our own server
and protocol.
See tools/test.sh for the example setup.
BYPASS_INCLUSIVE_LANGUAGE_REASON=man page
Bug: 173507504
Test: atest --host authfs_host_test_src_lib
Test: tools/test.sh (on workstation)
Change-Id: I0ec14559fe8b4df2bd6fe5888018c12963958dc2
diff --git a/authfs/tools/test.sh b/authfs/tools/test.sh
new file mode 100755
index 0000000..9ed3a99
--- /dev/null
+++ b/authfs/tools/test.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Run with -u to enter new namespace.
+if [[ $1 == "-u" ]]; then
+ exec unshare -m -U -r $0
+fi
+
+trap "umount /tmp/mnt" EXIT;
+mkdir -p /tmp/mnt
+
+echo "Mounting authfs in background ..."
+strace -o authfs.strace target/debug/authfs \
+ /tmp/mnt \
+ --local-verified-file 2:testdata/input.4m:testdata/input.4m.merkle_dump:testdata/input.4m.fsv_sig \
+ --local-verified-file 3:testdata/input.4k1:testdata/input.4k1.merkle_dump:testdata/input.4k1.fsv_sig \
+ --local-verified-file 4:testdata/input.4k:testdata/input.4k.merkle_dump:testdata/input.4k.fsv_sig \
+ --local-unverified-file 5:testdata/input.4k \
+ &
+sleep 0.1
+
+echo "Accessing files in authfs ..."
+echo
+md5sum /tmp/mnt/2 testdata/input.4m
+echo
+md5sum /tmp/mnt/3 testdata/input.4k1
+echo
+md5sum /tmp/mnt/4 /tmp/mnt/5 testdata/input.4k
+echo
+dd if=/tmp/mnt/2 bs=1000 skip=100 count=50 status=none |md5sum
+dd if=testdata/input.4m bs=1000 skip=100 count=50 status=none |md5sum
+echo
+tac /tmp/mnt/4 |md5sum
+tac /tmp/mnt/5 |md5sum
+tac testdata/input.4k |md5sum
+echo
+test -f /tmp/mnt/2 || echo 'FAIL: an expected file is missing'
+test -f /tmp/mnt/0 && echo 'FAIL: unexpected file presents'
+test -f /tmp/mnt/1 && echo 'FAIL: unexpected file presents, 1 is root dir'
+test -f /tmp/mnt/100 && echo 'FAIL: unexpected file presents'
+test -f /tmp/mnt/foo && echo 'FAIL: unexpected file presents'
+test -f /tmp/mnt/dir/3 && echo 'FAIL: unexpected file presents'
+echo "Done!"