fix: IBANs im Logbuch maskieren

backend/tests/historySanitization.test.ts

@@ -0,0 +1,55 @@
+import test from "node:test"
+import assert from "node:assert/strict"
+
+import {
+    maskIban,
+    sanitizeHistoryItem,
+    sanitizeHistoryText,
+    sanitizeHistoryValue,
+} from "../src/utils/historySanitization"
+
+const IBAN = "DE89370400440532013000"
+
+test("masks all but the first and last four IBAN characters", () => {
+    assert.equal(maskIban(IBAN), "DE89 **** **** 3000")
+    assert.equal(maskIban("DE89 3704 0044 0532 0130 00"), "DE89 **** **** 3000")
+})
+
+test("masks IBAN values in nested history data", () => {
+    const sanitized = sanitizeHistoryValue({
+        name: "Beispielkunde",
+        infoData: {
+            bankingIban: IBAN,
+            bankingIbans: [IBAN, "AT61 1904 3002 3457 3201"],
+        },
+    })
+
+    assert.deepEqual(sanitized, {
+        name: "Beispielkunde",
+        infoData: {
+            bankingIban: "DE89 **** **** 3000",
+            bankingIbans: ["DE89 **** **** 3000", "AT61 **** **** 3201"],
+        },
+    })
+})
+
+test("masks IBANs embedded in generated history text", () => {
+    const text = `Kunden: Info Daten geändert von "{\"bankingIbans\":[\"${IBAN}\"]}"`
+    const sanitized = sanitizeHistoryText(text)
+
+    assert.equal(sanitized.includes(IBAN), false)
+    assert.equal(sanitized.includes("DE89 **** **** 3000"), true)
+})
+
+test("sanitizes existing history items before they are returned", () => {
+    const sanitized = sanitizeHistoryItem({
+        text: `IBAN: ${IBAN}.`,
+        oldVal: JSON.stringify({ bankingIban: IBAN }),
+        newVal: { iban: IBAN },
+        config: null,
+    })
+
+    assert.equal(sanitized.text, "IBAN: DE89 **** **** 3000.")
+    assert.equal(sanitized.oldVal.includes(IBAN), false)
+    assert.deepEqual(sanitized.newVal, { iban: "DE89 **** **** 3000" })
+})