tests : fix intel trust authority quote generation tests (#290)

The version 1.6.1 for 24.10 change the output format for the generated
quote, we have to modify the tests to take into account this API change

tests/tests/test_guest_ita.py

@@ -23,15 +23,15 @@
 import Qemu
 import util
 
+ubuntu_codename = None
+
 def test_guest_measurement_trust_authority_success():
     """
     Trust Authority CLI quote generation success
     """
     change_qgsd_state('start')
     quote_str = run_trust_authority()
-    quote = json.loads(quote_str.replace(' ', ','))
-    assert len(quote) > 0, "Quote not valid: %s" % (quote_str)
-
+    check_ita_output(quote_str, for_success = True)
 
 def test_guest_measurement_trust_authority_failure():
     """
@@ -40,18 +40,44 @@ def test_guest_measurement_trust_authority_failure():
     change_qgsd_state('stop')
     quote_str = run_trust_authority()
     change_qgsd_state('start')
-    quote = json.loads(quote_str.replace(' ', ','))
-    assert len(quote) == 0, "Quote not valid: %s" % (quote_str)
-
+    check_ita_output(quote_str, for_success = False)
 
 def change_qgsd_state(state):
     cmd = ['systemctl', state, 'qgsd']
     subprocess.run(cmd)
     rc = subprocess.run(cmd, stderr=subprocess.STDOUT, timeout=30)
     assert 0 == rc.returncode, 'Failed change state of qgsd'
 
+def check_ita_output(quote_str : str, for_success : bool = True):
+    """
+    Check the validity of ITA quote output
+    Depending on the version of the ITA client, the output
+    may vary:
+    - Ubuntu 24.04 (ITA 1.5.0)
+      On success: [4 0 2 0 129 0 0 ... 0 0 0 0 0 ]
+      On failure: []
+    - Ubuntu 24.10 (ITA 1.6.1)
+      On success:
+        Quote: <base64_encoded_quote>
+        runtime_data: base64_encoded_runtime_data <- Optional
+        user_data: base64_encoded_user_data <- Optional
+      On failure:
+        Quote:
+    """
+    # regex to check the output of ITA quote command, the regex depends on ITA version
+    # for the moment, we extract the ITA version from the ubuntu release
+    # {10,0}: check for at least 10 characters to declare the quote valid
+    ita_output_regexp = {
+        'noble' : '\\[[0-9 ]{10,}\\]',
+        'oracular' : 'Quote: [-A-Za-z0-9+/]{10,}'
+    }
+    import re
+    pattern = re.compile(ita_output_regexp[ubuntu_codename])
+    assert (bool(pattern.match(quote_str)) == for_success), f'Error for code name : {codename}'
 
 def run_trust_authority():
+    global ubuntu_codename
+
     quote_str = ""
     with Qemu.QemuMachine() as qm:
         machine = qm.qcmd.plugins['machine']
@@ -61,6 +87,9 @@ def run_trust_authority():
 
         ssh = Qemu.QemuSSH(qm)
 
+        stdout, _ = ssh.check_exec('lsb_release -cs')
+        ubuntu_codename = stdout.read().decode().strip()
+
         stdout, stderr = ssh.check_exec('trustauthority-cli quote')
         quote_str = stdout.read().decode()
     return quote_str