feat(checker): add libevent checker (#3587)

Replace #1027, #1124, #2501 and #2760
Close #977

Signed-off-by: Fabrice Fontaine <[email protected]>

Author: ffontaine

cve_bin_tool/checkers/__init__.py

@@ -149,6 +149,7 @@
     "libcurl",
     "libdb",
     "libebml",
+    "libevent",
     "libexpat",
     "libgcrypt",
     "libgd",

cve_bin_tool/checkers/libevent.py

@@ -0,0 +1,24 @@
+# Copyright (C) 2023 Orange
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+
+"""
+CVE checker for libevent:
+
+https://www.cvedetails.com/product/10398/Niels-Provos-Libevent.html?vendor_id=2382
+https://www.cvedetails.com/product/32303/Libevent-Project-Libevent.html?vendor_id=15590
+
+"""
+from __future__ import annotations
+
+from cve_bin_tool.checkers import Checker
+
+
+class LibeventChecker(Checker):
+    CONTAINS_PATTERNS: list[str] = []
+    FILENAME_PATTERNS: list[str] = []
+    VERSION_PATTERNS = [
+        r"libevent using: %s[a-zA-Z%:. \r\n]*([0-9]+\.[0-9]+\.[0-9]+)-stable",
+        r"([0-9]+\.[0-9]+\.[0-9]+)-stable[0-9a-zA-Z|~,;!&+=*%_<>():'. \[\]\-\r\n]*libevent using:",
+    ]
+    VENDOR_PRODUCT = [("libevent_project", "libevent"), ("niels_provos", "libevent")]

test/condensed-downloads/libevent-2.0-5_2.0.21-stable-3_amd64.deb.tar.gz

@@ -0,0 +1,30 @@
+# Copyright (C) 2023 Orange
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+mapping_test_data = [
+    {
+        "product": "libevent",
+        "version": "2.0.21",
+        "version_strings": ["2.0.21-stable\nlibevent using:"],
+    },
+]
+package_test_data = [
+    {
+        "url": "http://rpmfind.net/linux/fedora/linux/development/rawhide/Everything/aarch64/os/Packages/l/",
+        "package_name": "libevent-2.1.12-7.fc37.aarch64.rpm",
+        "product": "libevent",
+        "version": "2.1.12",
+    },
+    {
+        "url": "http://ftp.fr.debian.org/debian/pool/main/libe/libevent/",
+        "package_name": "libevent-2.0-5_2.0.21-stable-3_amd64.deb",
+        "product": "libevent",
+        "version": "2.0.21",
+    },
+    {
+        "url": "https://downloads.openwrt.org/releases/packages-19.07/x86_64/base/",
+        "package_name": "libevent2-7_2.1.11-1_x86_64.ipk",
+        "product": "libevent",
+        "version": "2.1.11",
+    },
+]