test/units/testsuite-54.sh

   1 #!/usr/bin/env bash
   2 # SPDX-License-Identifier: LGPL-2.1-or-later
   3 # shellcheck disable=SC2016
   4 set -eux
   5
   6 systemd-analyze log-level debug
   7
   8 run_with_cred_compare() {
   9     local cred="${1:?}"
  10     local exp="${2?}"
  11     shift 2
  12
  13     diff <(systemd-run -p SetCredential="$cred" --wait --pipe -- systemd-creds "$@") <(echo -ne "$exp")
  14 }
  15
  16 # Sanity checks
  17 #
  18 # Create a dummy "full" disk (similar to /dev/full) to check out-of-space
  19 # scenarios
  20 mkdir /tmp/full
  21 mount -t tmpfs -o size=1,nr_inodes=1 tmpfs /tmp/full
  22
  23 # verb: setup
  24 # Run this first, otherwise any encrypted credentials wouldn't be decryptable
  25 # as we regnerate the host key
  26 rm -fv /var/lib/systemd/credential.secret
  27 systemd-creds setup
  28 test -e /var/lib/systemd/credential.secret
  29 rm -fv /var/lib/systemd/credential.secret
  30
  31 # Prepare a couple of dummy credentials for the cat/list verbs
  32 CRED_DIR="$(mktemp -d)"
  33 ENC_CRED_DIR="$(mktemp -d)"
  34 echo foo >"$CRED_DIR/secure-or-weak"
  35 echo foo >"$CRED_DIR/insecure"
  36 echo foo | systemd-creds --name="encrypted" encrypt - - | base64 -d >"$ENC_CRED_DIR/encrypted"
  37 echo foo | systemd-creds encrypt - - | base64 -d >"$ENC_CRED_DIR/encrypted-unnamed"
  38 chmod -R 0400 "$CRED_DIR" "$ENC_CRED_DIR"
  39 chmod -R 0444 "$CRED_DIR/insecure"
  40 mkdir /tmp/empty/
  41
  42 systemd-creds --system
  43 systemd-creds --no-pager --help
  44 systemd-creds --version
  45 systemd-creds has-tpm2 || :
  46 systemd-creds has-tpm2 -q || :
  47
  48 # verb: list
  49 systemd-creds list --system
  50 ENCRYPTED_CREDENTIALS_DIRECTORY="$ENC_CRED_DIR" CREDENTIALS_DIRECTORY="$CRED_DIR" systemd-creds list --no-legend
  51 ENCRYPTED_CREDENTIALS_DIRECTORY="$ENC_CRED_DIR" CREDENTIALS_DIRECTORY="$CRED_DIR" systemd-creds list --json=pretty | jq
  52 ENCRYPTED_CREDENTIALS_DIRECTORY="$ENC_CRED_DIR" CREDENTIALS_DIRECTORY="$CRED_DIR" systemd-creds list --json=short | jq
  53 ENCRYPTED_CREDENTIALS_DIRECTORY="$ENC_CRED_DIR" CREDENTIALS_DIRECTORY="$CRED_DIR" systemd-creds list --json=off
  54 ENCRYPTED_CREDENTIALS_DIRECTORY="/tmp/empty/" CREDENTIALS_DIRECTORY="/tmp/empty/" systemd-creds list
  55
  56 # verb: cat
  57 for cred in secure-or-weak insecure encrypted encrypted-unnamed; do
  58     ENCRYPTED_CREDENTIALS_DIRECTORY="$ENC_CRED_DIR" CREDENTIALS_DIRECTORY="$CRED_DIR" systemd-creds cat "$cred"
  59 done
  60 run_with_cred_compare "mycred:" "" cat mycred
  61 run_with_cred_compare "mycred:\n" "\n" cat mycred
  62 run_with_cred_compare "mycred:foo" "foo" cat mycred
  63 run_with_cred_compare "mycred:foo" "foofoofoo" cat mycred mycred mycred
  64 # Note: --newline= does nothing when stdout is not a tty, which is the case here
  65 run_with_cred_compare "mycred:foo" "foo" --newline=yes cat mycred
  66 run_with_cred_compare "mycred:foo" "foo" --newline=no cat mycred
  67 run_with_cred_compare "mycred:foo" "foo" --newline=auto cat mycred
  68 run_with_cred_compare "mycred:foo" "foo" --transcode=no cat mycred
  69 run_with_cred_compare "mycred:foo" "foo" --transcode=0 cat mycred
  70 run_with_cred_compare "mycred:foo" "foo" --transcode=false cat mycred
  71 run_with_cred_compare "mycred:foo" "Zm9v" --transcode=base64 cat mycred
  72 run_with_cred_compare "mycred:Zm9v" "foo" --transcode=unbase64 cat mycred
  73 run_with_cred_compare "mycred:Zm9v" "foofoofoo" --transcode=unbase64 cat mycred mycred mycred
  74 run_with_cred_compare "mycred:Zm9vCg==" "foo\n" --transcode=unbase64 cat mycred
  75 run_with_cred_compare "mycred:hello world" "68656c6c6f20776f726c64" --transcode=hex cat mycred
  76 run_with_cred_compare "mycred:68656c6c6f20776f726c64" "hello world" --transcode=unhex cat mycred
  77 run_with_cred_compare "mycred:68656c6c6f20776f726c64" "hello worldhello world" --transcode=unhex cat mycred mycred
  78 run_with_cred_compare "mycred:68656c6c6f0a776f726c64" "hello\nworld" --transcode=unhex cat mycred
  79 run_with_cred_compare 'mycred:{ "foo" : "bar", "baz" : [ 3, 4 ] }' '{"foo":"bar","baz":[3,4]}\n' --json=short cat mycred
  80 systemd-run -p SetCredential='mycred:{ "foo" : "bar", "baz" : [ 3, 4 ] }' --wait --pipe -- systemd-creds --json=pretty cat mycred | jq
  81
  82 # verb: encrypt/decrypt
  83 echo "According to all known laws of aviation..." >/tmp/cred.orig
  84 systemd-creds --with-key=host encrypt /tmp/cred.orig /tmp/cred.enc
  85 systemd-creds decrypt /tmp/cred.enc /tmp/cred.dec
  86 diff /tmp/cred.orig /tmp/cred.dec
  87 rm -f /tmp/cred.{enc,dec}
  88 # --pretty
  89 cred_name="fo'''o''bar"
  90 cred_option="$(systemd-creds --pretty --name="$cred_name" encrypt /tmp/cred.orig -)"
  91 mkdir -p /run/systemd/system
  92 cat >/run/systemd/system/test-54-pretty-cred.service <<EOF
  93 [Service]
  94 Type=oneshot
  95 ${cred_option:?}
  96 ExecStart=bash -c "diff <(systemd-creds cat \"$cred_name\") /tmp/cred.orig"
  97 EOF
  98 systemctl daemon-reload
  99 systemctl start test-54-pretty-cred
 100 rm /run/systemd/system/test-54-pretty-cred.service
 101 # Credential validation: name
 102 systemd-creds --name="foo" -H encrypt /tmp/cred.orig /tmp/cred.enc
 103 (! systemd-creds decrypt /tmp/cred.enc /tmp/cred.dec)
 104 (! systemd-creds --name="bar" decrypt /tmp/cred.enc /tmp/cred.dec)
 105 systemd-creds --name="" decrypt /tmp/cred.enc /tmp/cred.dec
 106 diff /tmp/cred.orig /tmp/cred.dec
 107 rm -f /tmp/cred.dec
 108 systemd-creds --name="foo" decrypt /tmp/cred.enc /tmp/cred.dec
 109 diff /tmp/cred.orig /tmp/cred.dec
 110 rm -f /tmp/cred.{enc,dec}
 111 # Credential validation: time
 112 systemd-creds --not-after="+1d" encrypt /tmp/cred.orig /tmp/cred.enc
 113 (! systemd-creds --timestamp="+2d" decrypt /tmp/cred.enc /tmp/cred.dec)
 114 systemd-creds decrypt /tmp/cred.enc /tmp/cred.dec
 115 diff /tmp/cred.orig /tmp/cred.dec
 116 rm -f /tmp/cred.{enc,dec}
 117
 118 (! unshare -m bash -exc "mount -t tmpfs tmpfs /run/credentials && systemd-creds list")
 119 (! unshare -m bash -exc "mount -t tmpfs tmpfs /run/credentials && systemd-creds --system list")
 120 (! CREDENTIALS_DIRECTORY="" systemd-creds list)
 121 (! systemd-creds --system --foo)
 122 (! systemd-creds --system -@)
 123 (! systemd-creds --system --json=)
 124 (! systemd-creds --system --json="")
 125 (! systemd-creds --system --json=foo)
 126 (! systemd-creds --system cat)
 127 (! systemd-creds --system cat "")
 128 (! systemd-creds --system cat this-should-not-exist)
 129 (! systemd-run -p SetCredential=mycred:foo --wait --pipe -- systemd-creds --transcode= cat mycred)
 130 (! systemd-run -p SetCredential=mycred:foo --wait --pipe -- systemd-creds --transcode="" cat mycred)
 131 (! systemd-run -p SetCredential=mycred:foo --wait --pipe -- systemd-creds --transcode=foo cat mycred)
 132 (! systemd-run -p SetCredential=mycred:foo --wait --pipe -- systemd-creds --newline=foo cat mycred)
 133 (! systemd-run -p SetCredential=mycred:notbase64 --wait --pipe -- systemd-creds --transcode=unbase64 cat mycred)
 134 (! systemd-run -p SetCredential=mycred:nothex --wait --pipe -- systemd-creds --transcode=unhex cat mycred)
 135 (! systemd-run -p SetCredential=mycred:a --wait --pipe -- systemd-creds --transcode=unhex cat mycred)
 136 (! systemd-run -p SetCredential=mycred:notjson --wait --pipe -- systemd-creds --json=short cat mycred)
 137 (! systemd-run -p SetCredential=mycred:notjson --wait --pipe -- systemd-creds --json=pretty cat mycred)
 138 (! systemd-creds encrypt /foo/bar/baz -)
 139 (! systemd-creds decrypt /foo/bar/baz -)
 140 (! systemd-creds decrypt / -)
 141 (! systemd-creds encrypt / -)
 142 (! echo foo | systemd-creds --with-key=foo encrypt - -)
 143 (! echo {0..20} | systemd-creds decrypt - -)
 144 (! systemd-creds --not-after= encrypt /tmp/cred.orig /tmp/cred.enc)
 145 (! systemd-creds --not-after="" encrypt /tmp/cred.orig /tmp/cred.enc)
 146 (! systemd-creds --not-after="-1d" encrypt /tmp/cred.orig /tmp/cred.enc)
 147 (! systemd-creds --timestamp= encrypt /tmp/cred.orig /tmp/cred.enc)
 148 (! systemd-creds --timestamp="" encrypt /tmp/cred.orig /tmp/cred.enc)
 149 (! dd if=/dev/zero count=2M | systemd-creds --with-key=tpm2-absent encrypt - /dev/null)
 150 (! dd if=/dev/zero count=2M | systemd-creds --with-key=tpm2-absent decrypt - /dev/null)
 151 (! echo foo | systemd-creds encrypt - /tmp/full/foo)
 152 (! echo foo | systemd-creds encrypt - - | systemd-creds decrypt - /tmp/full/foo)
 153
 154 # Verify that the creds are properly loaded and we can read them from the service's unpriv user
 155 systemd-run -p LoadCredential=passwd:/etc/passwd \
 156     -p LoadCredential=shadow:/etc/shadow \
 157     -p SetCredential=dog:wuff \
 158     -p DynamicUser=1 \
 159     --unit=test-54-unpriv.service \
 160     --wait \
 161     --pipe \
 162     cat '${CREDENTIALS_DIRECTORY}/passwd' '${CREDENTIALS_DIRECTORY}/shadow' '${CREDENTIALS_DIRECTORY}/dog' \
 163     >/tmp/ts54-concat
 164 (cat /etc/passwd /etc/shadow && echo -n wuff) | cmp /tmp/ts54-concat
 165 rm /tmp/ts54-concat
 166
 167 # Test that SetCredential= acts as fallback for LoadCredential=
 168 echo piff >/tmp/ts54-fallback
 169 [ "$(systemd-run -p LoadCredential=paff:/tmp/ts54-fallback -p SetCredential=paff:poff --pipe --wait systemd-creds cat paff)" = "piff" ]
 170 rm /tmp/ts54-fallback
 171 [ "$(systemd-run -p LoadCredential=paff:/tmp/ts54-fallback -p SetCredential=paff:poff --pipe --wait systemd-creds cat paff)" = "poff" ]
 172
 173 if systemd-detect-virt -q -c ; then
 174     expected_credential=mynspawncredential
 175     expected_value=strangevalue
 176 elif [ -d /sys/firmware/qemu_fw_cfg/by_name ]; then
 177     # Verify that passing creds through kernel cmdline works
 178     [ "$(systemd-creds --system cat kernelcmdlinecred)" = "uff" ]
 179
 180     # And that it also works via SMBIOS
 181     [ "$(systemd-creds --system cat smbioscredential)" = "magicdata" ]
 182     [ "$(systemd-creds --system cat binarysmbioscredential)" = "magicbinarydata" ]
 183
 184     # If we aren't run in nspawn, we are run in qemu
 185     systemd-detect-virt -q -v
 186     expected_credential=myqemucredential
 187     expected_value=othervalue
 188
 189     # Verify that writing a sysctl via the kernel cmdline worked
 190     [ "$(cat /proc/sys/kernel/domainname)" = "sysctltest" ]
 191
 192     # Verify that creating a user via sysusers via the kernel cmdline worked
 193     grep -q ^credtestuser: /etc/passwd
 194
 195     # Verify that writing a file via tmpfiles worked
 196     [ "$(cat /tmp/sourcedfromcredential)" = "tmpfilessecret" ]
 197     [ "$(cat /etc/motd.d/50-provision.conf)" = "hello" ]
 198     [ "$(cat /etc/issue.d/50-provision.conf)" = "welcome" ]
 199 else
 200     echo "qemu_fw_cfg support missing in kernel. Sniff!"
 201     expected_credential=""
 202     expected_value=""
 203 fi
 204
 205 if [ "$expected_credential" != "" ] ; then
 206     # If this test is run in nspawn a credential should have been passed to us. See test/TEST-54-CREDS/test.sh
 207     [ "$(systemd-creds --system cat "$expected_credential")" = "$expected_value" ]
 208
 209     # Test that propagation from system credential to service credential works
 210     [ "$(systemd-run -p LoadCredential="$expected_credential" --pipe --wait systemd-creds cat "$expected_credential")" = "$expected_value" ]
 211
 212     # Check it also works, if we rename it while propagating it
 213     [ "$(systemd-run -p LoadCredential=miau:"$expected_credential" --pipe --wait systemd-creds cat miau)" = "$expected_value" ]
 214
 215     # Combine it with a fallback (which should have no effect, given the cred should be passed down)
 216     [ "$(systemd-run -p LoadCredential="$expected_credential" -p SetCredential="$expected_credential":zzz --pipe --wait systemd-creds cat "$expected_credential")" = "$expected_value" ]
 217
 218     # This should succeed
 219     systemd-run -p AssertCredential="$expected_credential" -p Type=oneshot true
 220
 221     # And this should fail
 222     (! systemd-run -p AssertCredential="undefinedcredential" -p Type=oneshot true)
 223 fi
 224
 225 # Verify that the creds are immutable
 226 (! systemd-run -p LoadCredential=passwd:/etc/passwd \
 227     -p DynamicUser=1 \
 228     --unit=test-54-immutable-touch.service \
 229     --wait \
 230     touch '${CREDENTIALS_DIRECTORY}/passwd')
 231 (! systemd-run -p LoadCredential=passwd:/etc/passwd \
 232     -p DynamicUser=1 \
 233     --unit=test-54-immutable-rm.service \
 234     --wait \
 235     rm '${CREDENTIALS_DIRECTORY}/passwd')
 236
 237 # Check directory-based loading
 238 mkdir -p /tmp/ts54-creds/sub
 239 echo -n a >/tmp/ts54-creds/foo
 240 echo -n b >/tmp/ts54-creds/bar
 241 echo -n c >/tmp/ts54-creds/baz
 242 echo -n d >/tmp/ts54-creds/sub/qux
 243 systemd-run -p LoadCredential=cred:/tmp/ts54-creds \
 244     -p DynamicUser=1 \
 245     --unit=test-54-dir.service \
 246     --wait \
 247     --pipe \
 248     cat '${CREDENTIALS_DIRECTORY}/cred_foo' \
 249         '${CREDENTIALS_DIRECTORY}/cred_bar' \
 250         '${CREDENTIALS_DIRECTORY}/cred_baz' \
 251         '${CREDENTIALS_DIRECTORY}/cred_sub_qux' >/tmp/ts54-concat
 252 cmp /tmp/ts54-concat <(echo -n abcd)
 253 rm /tmp/ts54-concat
 254 rm -rf /tmp/ts54-creds
 255
 256 # Now test encrypted credentials (only supported when built with OpenSSL though)
 257 if systemctl --version | grep -q -- +OPENSSL ; then
 258     echo -n $RANDOM >/tmp/test-54-plaintext
 259     systemd-creds encrypt --name=test-54 /tmp/test-54-plaintext /tmp/test-54-ciphertext
 260     systemd-creds decrypt --name=test-54 /tmp/test-54-ciphertext | cmp /tmp/test-54-plaintext
 261
 262     systemd-run -p LoadCredentialEncrypted=test-54:/tmp/test-54-ciphertext \
 263         --wait \
 264         --pipe \
 265         cat '${CREDENTIALS_DIRECTORY}/test-54' | cmp /tmp/test-54-plaintext
 266
 267     echo -n $RANDOM >/tmp/test-54-plaintext
 268     systemd-creds encrypt --name=test-54 /tmp/test-54-plaintext /tmp/test-54-ciphertext
 269     systemd-creds decrypt --name=test-54 /tmp/test-54-ciphertext | cmp /tmp/test-54-plaintext
 270
 271     systemd-run -p SetCredentialEncrypted=test-54:"$(cat /tmp/test-54-ciphertext)" \
 272         --wait \
 273         --pipe \
 274         cat '${CREDENTIALS_DIRECTORY}/test-54' | cmp /tmp/test-54-plaintext
 275
 276     rm /tmp/test-54-plaintext /tmp/test-54-ciphertext
 277 fi
 278
 279 # https://github.com/systemd/systemd/issues/27275
 280 systemd-run -p DynamicUser=yes -p 'LoadCredential=os:/etc/os-release' \
 281             -p 'ExecStartPre=true' \
 282             -p 'ExecStartPre=systemd-creds cat os' \
 283             --unit=test-54-exec-start.service \
 284             --wait \
 285             --pipe \
 286             true | cmp /etc/os-release
 287
 288 systemd-analyze log-level info
 289
 290 echo OK >/testok
 291
 292 exit 0