Apeaksoft Android Toolkit Registration Code Review

// 5️⃣ Optional: verify signature (HMAC) for tamper‑proofing // The server also sends a `signature` field which is HMAC‑SHA256 // of the payload using a secret known only to the server. val signature = json.getString("signature") if (!verifySignature(payload, signature)) throw LicenseException("License response signature mismatch.")

/** Helper: verify server‑side HMAC signature */ private fun verifySignature(data: String, signature: String): Boolean val secret = "s3cr3t_server_key".toByteArray(Charsets.UTF_8) // not really hard‑coded in production val mac = javax.crypto.Mac.getInstance("HmacSHA256") mac.init(javax.crypto.spec.SecretKeySpec(secret, "HmacSHA256")) val expected = Base64.getEncoder().encodeToString(mac.doFinal(data.toByteArray())) return expected == signature apeaksoft android toolkit registration code

dependencies // Core (free) components implementation "com.apeaksoft:android-toolkit-ui:1.4.2" apeaksoft android toolkit registration code

package com.apeaksoft.toolkit.license

// 4️⃣ Parse JSON response val json = JSONObject(response.body?.string() ?: "") val valid = json.getBoolean("valid") if (!valid) throw LicenseException("License key is invalid or expired.") apeaksoft android toolkit registration code

// 2️⃣ Build request body val payload = JSONObject().apply put("key", key) put("machineId", machineId) .toString()