Move safe-chain package to packages/safe-chain

packages/safe-chain/src/scanning/audit/index.js

@@ -0,0 +1,56 @@
+import {
+  MALWARE_STATUS_MALWARE,
+  openMalwareDatabase,
+} from "../malwareDatabase.js";
+
+export async function auditChanges(changes) {
+  const allowedChanges = [];
+  const disallowedChanges = [];
+
+  var malwarePackages = await getPackagesWithMalware(
+    changes.filter(
+      (change) => change.type === "add" || change.type === "change"
+    )
+  );
+
+  for (const change of changes) {
+    const malwarePackage = malwarePackages.find(
+      (pkg) => pkg.name === change.name && pkg.version === change.version
+    );
+
+    if (malwarePackage) {
+      disallowedChanges.push({ ...change, reason: malwarePackage.status });
+    } else {
+      allowedChanges.push(change);
+    }
+  }
+
+  const auditResults = {
+    allowedChanges,
+    disallowedChanges,
+    isAllowed: disallowedChanges.length === 0,
+  };
+
+  return auditResults;
+}
+
+async function getPackagesWithMalware(changes) {
+  if (changes.length === 0) {
+    return [];
+  }
+
+  const malwareDb = await openMalwareDatabase();
+  let allVulnerablePackages = [];
+
+  for (const change of changes) {
+    if (malwareDb.isMalware(change.name, change.version)) {
+      allVulnerablePackages.push({
+        name: change.name,
+        version: change.version,
+        status: MALWARE_STATUS_MALWARE,
+      });
+    }
+  }
+
+  return allVulnerablePackages;
+}