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https://github.com/linux-apfs/apfstests.git
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generic: add test for non-root use of fscrypt API additions
Test non-root use of the fscrypt filesystem-level encryption keyring and v2 encryption policies. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Eric Biggers
Eryu Guan
Executable
+144
@@ -0,0 +1,144 @@
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#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright 2019 Google LLC
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#
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# FS QA Test No. generic/581
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#
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# Test non-root use of the fscrypt filesystem-level encryption keyring
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# and v2 encryption policies.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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echo
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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orig_maxkeys=
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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if [ -n "$orig_maxkeys" ]; then
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echo "$orig_maxkeys" > /proc/sys/kernel/keys/maxkeys
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fi
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/encrypt
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_user
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_require_scratch_encryption -v 2
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_scratch_mkfs_encrypted &>> $seqres.full
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_scratch_mount
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# Set the fsgqa user's key quota to their current number of keys plus 5.
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orig_keys=$(_user_do "awk '/^[[:space:]]*$(id -u fsgqa):/{print \$4}' /proc/key-users | cut -d/ -f1")
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: ${orig_keys:=0}
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echo "orig_keys=$orig_keys" >> $seqres.full
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orig_maxkeys=$(</proc/sys/kernel/keys/maxkeys)
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keys_to_add=5
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echo $((orig_keys + keys_to_add)) > /proc/sys/kernel/keys/maxkeys
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dir=$SCRATCH_MNT/dir
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raw_key=""
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for i in `seq 64`; do
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raw_key+="\\x$(printf "%02x" $i)"
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done
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keydesc="0000111122223333"
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keyid="69b2f6edeee720cce0577937eb8a6751"
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chmod 777 $SCRATCH_MNT
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_user_do "mkdir $dir"
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echo "# Setting v1 policy as regular user (should succeed)"
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_user_do_set_encpolicy $dir $keydesc
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echo "# Getting v1 policy as regular user (should succeed)"
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_user_do_get_encpolicy $dir | _filter_scratch
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echo "# Adding v1 policy key as regular user (should fail with EACCES)"
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_user_do_add_enckey $SCRATCH_MNT "$raw_key" -d $keydesc
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rm -rf $dir
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echo
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_user_do "mkdir $dir"
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echo "# Setting v2 policy as regular user without key already added (should fail with ENOKEY)"
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_user_do_set_encpolicy $dir $keyid |& _filter_scratch
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echo "# Adding v2 policy key as regular user (should succeed)"
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_user_do_add_enckey $SCRATCH_MNT "$raw_key"
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echo "# Setting v2 policy as regular user with key added (should succeed)"
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_user_do_set_encpolicy $dir $keyid
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echo "# Getting v2 policy as regular user (should succeed)"
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_user_do_get_encpolicy $dir | _filter_scratch
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echo "# Creating encrypted file as regular user (should succeed)"
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_user_do "echo contents > $dir/file"
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echo "# Removing v2 policy key as regular user (should succeed)"
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_user_do_rm_enckey $SCRATCH_MNT $keyid
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_scratch_cycle_mount # Clear all keys
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echo
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echo "# Testing user key quota"
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for i in `seq $((keys_to_add + 1))`; do
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rand_raw_key=$(_generate_raw_encryption_key)
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_user_do_add_enckey $SCRATCH_MNT "$rand_raw_key" \
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| sed 's/ with identifier .*$//'
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done
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rm -rf $dir
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echo
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_user_do "mkdir $dir"
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_scratch_cycle_mount # Clear all keys
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# Test multiple users adding the same key.
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echo "# Adding key as root"
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_add_enckey $SCRATCH_MNT "$raw_key"
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echo "# Getting key status as regular user"
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_user_do_enckey_status $SCRATCH_MNT $keyid
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echo "# Removing key only added by another user (should fail with ENOKEY)"
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_user_do_rm_enckey $SCRATCH_MNT $keyid
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echo "# Setting v2 encryption policy with key only added by another user (should fail with ENOKEY)"
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_user_do_set_encpolicy $dir $keyid |& _filter_scratch
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echo "# Adding second user of key"
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_user_do_add_enckey $SCRATCH_MNT "$raw_key"
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echo "# Getting key status as regular user"
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_user_do_enckey_status $SCRATCH_MNT $keyid
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echo "# Setting v2 encryption policy as regular user"
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_user_do_set_encpolicy $dir $keyid
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echo "# Removing this user's claim to the key"
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_user_do_rm_enckey $SCRATCH_MNT $keyid
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echo "# Getting key status as regular user"
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_user_do_enckey_status $SCRATCH_MNT $keyid
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echo "# Adding back second user of key"
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_user_do_add_enckey $SCRATCH_MNT "$raw_key"
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echo "# Remove key for \"all users\", as regular user (should fail with EACCES)"
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_user_do_rm_enckey $SCRATCH_MNT $keyid -a |& _filter_scratch
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_enckey_status $SCRATCH_MNT $keyid
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echo "# Remove key for \"all users\", as root"
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_rm_enckey $SCRATCH_MNT $keyid -a
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_enckey_status $SCRATCH_MNT $keyid
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# success, all done
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status=0
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exit
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@@ -0,0 +1,62 @@
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QA output created by 581
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# Setting v1 policy as regular user (should succeed)
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# Getting v1 policy as regular user (should succeed)
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Encryption policy for SCRATCH_MNT/dir:
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Policy version: 0
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Master key descriptor: 0000111122223333
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Contents encryption mode: 1 (AES-256-XTS)
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Filenames encryption mode: 4 (AES-256-CTS)
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Flags: 0x02
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# Adding v1 policy key as regular user (should fail with EACCES)
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Permission denied
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# Setting v2 policy as regular user without key already added (should fail with ENOKEY)
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SCRATCH_MNT/dir: failed to set encryption policy: Required key not available
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# Adding v2 policy key as regular user (should succeed)
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Added encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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# Setting v2 policy as regular user with key added (should succeed)
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# Getting v2 policy as regular user (should succeed)
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Encryption policy for SCRATCH_MNT/dir:
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Policy version: 2
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Master key identifier: 69b2f6edeee720cce0577937eb8a6751
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Contents encryption mode: 1 (AES-256-XTS)
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Filenames encryption mode: 4 (AES-256-CTS)
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Flags: 0x02
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# Creating encrypted file as regular user (should succeed)
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# Removing v2 policy key as regular user (should succeed)
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Removed encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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# Testing user key quota
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Added encryption key
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Added encryption key
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Added encryption key
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Added encryption key
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Added encryption key
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Error adding encryption key: Disk quota exceeded
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# Adding key as root
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Added encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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# Getting key status as regular user
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Present (user_count=1)
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# Removing key only added by another user (should fail with ENOKEY)
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Error removing encryption key: Required key not available
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# Setting v2 encryption policy with key only added by another user (should fail with ENOKEY)
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SCRATCH_MNT/dir: failed to set encryption policy: Required key not available
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# Adding second user of key
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Added encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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# Getting key status as regular user
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Present (user_count=2, added_by_self)
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# Setting v2 encryption policy as regular user
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# Removing this user's claim to the key
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Removed user's claim to encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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# Getting key status as regular user
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Present (user_count=1)
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# Adding back second user of key
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Added encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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# Remove key for "all users", as regular user (should fail with EACCES)
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Permission denied
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Present (user_count=2, added_by_self)
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# Remove key for "all users", as root
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Removed encryption key with identifier 69b2f6edeee720cce0577937eb8a6751
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Absent
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@@ -583,3 +583,4 @@
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578 auto quick rw clone
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579 auto stress verity
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580 auto quick encrypt
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581 auto quick encrypt
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