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 # Verify that the creds are properly loaded and we can read them from the service's unpriv user
   9 systemd-run -p LoadCredential=passwd:/etc/passwd \
  10             -p LoadCredential=shadow:/etc/shadow \
  11             -p SetCredential=dog:wuff \
  12             -p DynamicUser=1 \
  13             --wait \
  14             --pipe \
  15             cat '${CREDENTIALS_DIRECTORY}/passwd' '${CREDENTIALS_DIRECTORY}/shadow' '${CREDENTIALS_DIRECTORY}/dog' >/tmp/ts54-concat
  16 ( cat /etc/passwd /etc/shadow && echo -n wuff ) | cmp /tmp/ts54-concat
  17 rm /tmp/ts54-concat
  18
  19 # Test that SetCredential= acts as fallback for LoadCredential=
  20 echo piff > /tmp/ts54-fallback
  21 [ "$(systemd-run -p LoadCredential=paff:/tmp/ts54-fallback -p SetCredential=paff:poff --pipe --wait systemd-creds cat paff)" = "piff" ]
  22 rm /tmp/ts54-fallback
  23 [ "$(systemd-run -p LoadCredential=paff:/tmp/ts54-fallback -p SetCredential=paff:poff --pipe --wait systemd-creds cat paff)" = "poff" ]
  24
  25 if systemd-detect-virt -q -c ; then
  26     expected_credential=mynspawncredential
  27     expected_value=strangevalue
  28 elif [ -d /sys/firmware/qemu_fw_cfg/by_name ]; then
  29     # Verify that passing creds through kernel cmdline works
  30     [ "$(systemd-creds --system cat kernelcmdlinecred)" = "uff" ]
  31
  32     # And that it also works via SMBIOS
  33     [ "$(systemd-creds --system cat smbioscredential)" = "magicdata" ]
  34     [ "$(systemd-creds --system cat binarysmbioscredential)" = "magicbinarydata" ]
  35
  36     # If we aren't run in nspawn, we are run in qemu
  37     systemd-detect-virt -q -v
  38     expected_credential=myqemucredential
  39     expected_value=othervalue
  40
  41     # Verify that writing a sysctl via the kernel cmdline worked
  42     [ "$(cat /proc/sys/kernel/domainname)" = "sysctltest" ]
  43
  44     # Verify that creating a user via sysusers via the kernel cmdline worked
  45     grep -q ^credtestuser: /etc/passwd
  46 else
  47     echo "qemu_fw_cfg support missing in kernel. Sniff!"
  48     expected_credential=""
  49     expected_value=""
  50 fi
  51
  52 if [ "$expected_credential" != "" ] ; then
  53     # If this test is run in nspawn a credential should have been passed to us. See test/TEST-54-CREDS/test.sh
  54     [ "$(systemd-creds --system cat "$expected_credential")" = "$expected_value" ]
  55
  56     # Test that propagation from system credential to service credential works
  57     [ "$(systemd-run -p LoadCredential="$expected_credential" --pipe --wait systemd-creds cat "$expected_credential")" = "$expected_value" ]
  58
  59     # Check it also works, if we rename it while propagating it
  60     [ "$(systemd-run -p LoadCredential=miau:"$expected_credential" --pipe --wait systemd-creds cat miau)" = "$expected_value" ]
  61
  62     # Combine it with a fallback (which should have no effect, given the cred should be passed down)
  63     [ "$(systemd-run -p LoadCredential="$expected_credential" -p SetCredential="$expected_credential":zzz --pipe --wait systemd-creds cat "$expected_credential")" = "$expected_value" ]
  64
  65     # This should succeed
  66     systemd-run -p AssertCredential="$expected_credential" -p Type=oneshot true
  67
  68     # And this should fail
  69     systemd-run -p AssertCredential="undefinedcredential" -p Type=oneshot true && { echo 'unexpected success'; exit 1; }
  70 fi
  71
  72 # Verify that the creds are immutable
  73 systemd-run -p LoadCredential=passwd:/etc/passwd \
  74             -p DynamicUser=1 \
  75             --wait \
  76             touch '${CREDENTIALS_DIRECTORY}/passwd' \
  77     && { echo 'unexpected success'; exit 1; }
  78 systemd-run -p LoadCredential=passwd:/etc/passwd \
  79             -p DynamicUser=1 \
  80             --wait \
  81             rm '${CREDENTIALS_DIRECTORY}/passwd' \
  82     && { echo 'unexpected success'; exit 1; }
  83
  84 # Check directory-based loading
  85 mkdir -p /tmp/ts54-creds/sub
  86 echo -n a >/tmp/ts54-creds/foo
  87 echo -n b >/tmp/ts54-creds/bar
  88 echo -n c >/tmp/ts54-creds/baz
  89 echo -n d >/tmp/ts54-creds/sub/qux
  90 systemd-run -p LoadCredential=cred:/tmp/ts54-creds \
  91             -p DynamicUser=1 \
  92             --wait \
  93             --pipe \
  94             cat '${CREDENTIALS_DIRECTORY}/cred_foo' \
  95                 '${CREDENTIALS_DIRECTORY}/cred_bar' \
  96                 '${CREDENTIALS_DIRECTORY}/cred_baz' \
  97                 '${CREDENTIALS_DIRECTORY}/cred_sub_qux' >/tmp/ts54-concat
  98 ( echo -n abcd ) | cmp /tmp/ts54-concat
  99 rm /tmp/ts54-concat
 100 rm -rf /tmp/ts54-creds
 101
 102 # Now test encrypted credentials (only supported when built with OpenSSL though)
 103 if systemctl --version | grep -q -- +OPENSSL ; then
 104     echo -n $RANDOM >/tmp/test-54-plaintext
 105     systemd-creds encrypt --name=test-54 /tmp/test-54-plaintext /tmp/test-54-ciphertext
 106     systemd-creds decrypt --name=test-54 /tmp/test-54-ciphertext | cmp /tmp/test-54-plaintext
 107
 108     systemd-run -p LoadCredentialEncrypted=test-54:/tmp/test-54-ciphertext \
 109                 --wait \
 110                 --pipe \
 111                 cat '${CREDENTIALS_DIRECTORY}/test-54' | cmp /tmp/test-54-plaintext
 112
 113     echo -n $RANDOM >/tmp/test-54-plaintext
 114     systemd-creds encrypt --name=test-54 /tmp/test-54-plaintext /tmp/test-54-ciphertext
 115     systemd-creds decrypt --name=test-54 /tmp/test-54-ciphertext | cmp /tmp/test-54-plaintext
 116
 117     systemd-run -p SetCredentialEncrypted=test-54:"$(cat /tmp/test-54-ciphertext)" \
 118                 --wait \
 119                 --pipe \
 120                 cat '${CREDENTIALS_DIRECTORY}/test-54' | cmp /tmp/test-54-plaintext
 121
 122     rm /tmp/test-54-plaintext /tmp/test-54-ciphertext
 123 fi
 124
 125 systemd-analyze log-level info
 126
 127 echo OK >/testok
 128
 129 exit 0