Added DNF package manager parser Resolves #6

Signed-off-by: Anshu Kumar <[email protected]>

Author: anshuca0743

code/parsers/__init__.py

@@ -12,6 +12,7 @@
 from parsers.goget import GoGetParser
 from parsers.maven import MavenParser
 from parsers.nuget import NuGetParser
+from parsers.dnf import DNFParser
 
 # TODO: Figure out dynamic loading of parsers
 ALL_PARSERS = {
@@ -25,5 +26,6 @@
     "CurlParser": CurlParser,
     "GoGetParser": GoGetParser,
     "MavenParser": MavenParser,
-    "NuGetParser": NuGetParser
+    "NuGetParser": NuGetParser,
+    "DNFParser": DNFParser
 }

code/parsers/dnf.py

@@ -0,0 +1,61 @@
+# Copyright 2020-2023 VMware, Inc.
+# SPDX-License-Identifier: BSD-2-Clause
+
+from typing import List
+from parsers.base import ParserBase
+from models import DependencyRelation, ExtractedDependency, ExtractedFinding
+import re
+
+
+class DNFParser(ParserBase):
+
+    yara_rule = """
+        rule yum
+        {
+        meta:
+            description = "detects dnf being run and provides package and version extraction"
+            parser = "DNFParser"
+        strings:
+            $install_or_update = /\\bdnf(\\b|\\b.*\\b)(update|install)\\b/
+        condition:
+            any of them
+        }
+        """
+    parser_name = "DNFParser"
+    parser_description = "This parser is designed to extract dependencies brought in through the DNF package installer."
+
+    def on_load(self) -> None:
+        # self.dependency_extractor_regex = re.compile(r"Installed:(.*?)(?=Complete.)")
+        self.dependency_extractor_regex = re.compile(
+            r"\s+(\S+-\S+-\S+(-\d+)?\.\S+)+"
+        )
+
+    def get_document_dependencies(self, document: str) -> List[ExtractedDependency]:
+        dependencies = []
+        print("%%%%%%is it coming in dnf parser%%%%%%%%%")
+        dependency_matches = self.dependency_extractor_regex.findall(document)
+        packages = []
+        for match in dependency_matches:
+            package_pattern = r"([a-zA-Z-]+)-([\d\.\-a-zA-Z]+)\.(\S+)\s*"
+            package_matches = re.findall(package_pattern, match[0])
+            packages.extend(package_matches)
+
+        for package in packages:
+                print("$$$$$$$$$$$$$$$$$$$$")
+                pack = ''.join(package)
+                dependencies.append(
+                    ExtractedDependency(
+                        name=f"{package[0]}",
+                        version=f"{package[1]}",
+                        type="Fedora",
+                        extraction_source=f"{''.join(package)+'.rpm'}",
+                        download_location="Fedora",
+                        result=DependencyRelation.CONSUMED,
+                    )
+                )
+        return dependencies
+
+    def get_document_findings(self, document: str) -> List[ExtractedFinding]:
+        findings = []
+
+        return findings