src/sys/pkg/bin/omaha-client/test_data/key_config.json

{
    "https://example.com": {
        "latest": {
            "id": 123456789,
            "key": "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEHKz/tV8vLO/YnYnrN0smgRUkUoAt\n7qCZFgaBN9g5z3/EgaREkjBNfvZqwRe+/oOo0I8VXytS+fYY3URwKQSODw==\n-----END PUBLIC KEY-----"
        },
        "historical": []
    }
}