Offline Request Schema

Overview

As part of our ongoing efforts to strengthen security, we have introduced Schema Version 2 (v2) for offline requests. This update enhances request integrity by ensuring the entire payload is signed and verifiable.

Schema Version 2 (v2) – Changes

Schema v2 introduces full payload signing and request versioning.

Key Changes

• Schema Version Field

  • Every request now includes a schema_version field.

  • Allows License API to detect and handle the request format.

• HMAC-SHA256 Signature

  • The entire request JSON is signed using HMAC-SHA256 with the client secret or shared key.

  • Ensures all fields are protected from tampering.

• Nested Request Object

  • The signed request is wrapped in an outer JSON object.

  • The request field must remain a proper JSON object (not a string) to allow correct parsing and signature verification on the License API side.

Example (v2)

offline-request-v2.json

{
  "request": {
    "schema_version": 2,
    "api_key": "apikey",
    "date": "Fri, 29 Aug 2025 07:22:37 GMT",
    "hardware_id": "8b06c6053b7a2040f07c60b62f17f378ccc5030e21676f8a100a97ab36303ad0",
    "ip_local": "192.168.1.226",
    "license_key": "BSK8-CLCY-PB5E-BXFO",
    "mac_address": "5A-8A-90-08-13-84",
    "os_hostname": "Mac",
    "os_ver": "Darwin 24.6.0",
    "product": "fooapp",
    "request": "activation",
    "request_id": "D010714E-72DD-E4CF-BEBB-4105EC1B2A0F",
    "sdk_lang": "cpp",
    "sdk_ver": "7.41.1",
    "signature": "A7Tg3dBCc3OsegkPdPc6I1/sRqHj1uSuBR3ad8uaEnk="
  },
  "signature": "aad1693bf8b394719b695e916e07aee29d4ddf2afb24cc43febd4d43a660b703"
}

Benefits of v2

• Full payload integrity: all fields are signed, including previously optional fields.

• Backward-compatible: older SDKs using v1 requests will still work while v2 enables enhanced security.

• Simplifies License API parsing and signature verification.

Enabling Schema Version 2

1

Step

Log in to the Vendor Platform.

2

Step

In the left sidebar, go to Settings → Preferences.

3

Step

Locate the Minimum Offline Request Schema Version section.

4

Step

Select V2 from the dropdown list.

By default, this setting is Version 1, so you must switch it to Version 2 to start generating v2 offline requests.

Schema Version Selection

Offline schema v2 requires an SDK version that supports v2. Check your SDK documentation (and changelogs) under SDKs before enabling.