Merge pull request #464 from Pushpit07/collect_xen

Collect xen

Author: Hritik14

pytest.ini

@@ -32,5 +32,6 @@ addopts =
 	--ignore=vulnerabilities/importers/ubuntu_usn.py
 	--ignore=vulnerabilities/importers/mozilla.py
 	--ignore=vulnerabilities/importers/mattermost.py
+	--ignore=vulnerabilities/importers/xen.py
 	--ignore=vulnerabilities/management/commands/create_cpe_to_purl_map.py
 	--ignore=vulnerabilities/lib_oval.py

vulnerabilities/fixtures/openssl.json

@@ -40764,5 +40764,19 @@
                 ]
             }
         }
+    },
+    {
+        "model": "vulnerabilities.importer",
+        "pk": 17,
+        "fields": {
+            "name": "xen",
+            "license": "gplv2",
+            "last_run": null,
+            "data_source": "XenDataSource",
+            "data_source_cfg": {
+                "etags": {},
+                "db_url": "https://xenbits.xen.org/xsa/xsa.json"
+            }
+        }
     }
 ]

vulnerabilities/importers/xen.py

@@ -0,0 +1,88 @@
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# http://nexb.com and https://github.com/nexB/vulnerablecode/
+# The VulnerableCode software is licensed under the Apache License version 2.0.
+# Data generated with VulnerableCode require an acknowledgment.
+#
+# You may not use this software except in compliance with the License.
+# You may obtain a copy of the License at: http://apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software distributed
+# under the License is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+# When you publish or redistribute any data created with VulnerableCode or any VulnerableCode
+# derivative work, you must accompany this data with the following acknowledgment:
+#
+#  Generated with VulnerableCode and provided on an 'AS IS' BASIS, WITHOUT WARRANTIES
+#  OR CONDITIONS OF ANY KIND, either express or implied. No content created from
+#  VulnerableCode should be considered or used as legal advice. Consult an Attorney
+#  for any legal advice.
+#  VulnerableCode is a free software code scanning tool from nexB Inc. and others.
+#  Visit https://github.com/nexB/vulnerablecode/ for support and download.
+
+import bz2
+import dataclasses
+import json
+
+import requests
+from packageurl import PackageURL
+
+from vulnerabilities.importer import Importer
+from vulnerabilities.importer import Advisory
+from vulnerabilities.importer import Reference
+from vulnerabilities.helpers import create_etag
+from vulnerabilities.helpers import is_cve
+
+
+class XenImporter(Importer):
+    CONFIG_CLASS = XenDBConfiguration
+
+    def updated_advisories(self):
+        advisories = []
+        if create_etag(data_src=self, url=self.config.db_url, etag_key="etag"):
+            advisories.extend(self.to_advisories(fetch(self.config.db_url)))
+
+        return self.batch_advisories(advisories)
+
+    def create_etag(self, url):
+        etag = requests.head(url).headers.get("etag")
+        if not etag:
+            return True
+
+        elif url in self.config.etags:
+            if self.config.etags[url] == etag:
+                return False
+
+        self.config.etags[url] = etag
+        return True
+
+    @staticmethod
+    def to_advisories(xen_db):
+        advisories = []
+        for xsa in xen_db[0]["xsas"]:
+            reference = get_xen_references(xsa["xsa"])
+            title = xsa.get("title", [""])
+            for cve in xsa.get("cve", [""]):
+                if not is_cve(cve):
+                    cve = ""
+
+                advisories.append(
+                    Advisory(
+                        vulnerability_id=cve,
+                        summary=title,
+                        references=[reference],
+                    )
+                )
+        return advisories
+
+
+def get_xen_references(xsa_id):
+    return Reference(
+        reference_id="XSA-" + xsa_id,
+        url="https://xenbits.xen.org/xsa/advisory-{}.html".format(xsa_id),
+    )
+
+
+def fetch(url):
+    response = requests.get(url).content
+    return json.loads(response)