getSteamGuardDetails() gives false info

[npabisz]

If there is 2fa enabled on account and you login it having no auth file getSteamGuardDetails() returns canTrade equal to false based on steam guard enabled time on this machine, but if you have mobile auth you can freely trade on new machines having secret keys? So it gives false info, am I right?

[Ne3tCode]

I can confirm false-negative result if the Steam Guard was activated before Steam began to remember the date of activation. Example:
SteamUser.getSteamGuardDetails() result:

enabled: true
enabledTime: 2012-12-21 18:29:57 // can be 'null'
machineTime: null
canTrade: false // WRONG!

Raw data:

{
  "is_steamguard_enabled": true,
  "timestamp_steamguard_enabled": 1356103797, // can be '0'
  "deprecated_newauthentication": [],
  "deprecated_machine_name_userchosen": "",
  "deprecated_timestamp_machine_steamguard_enabled": 0,
  "deprecated_authentication_exists_from_geoloc_before_mintime": null,
  "deprecated_machine_id": <redacted>,
  "session_data": [
    {
      "machine_id": <redacted>,
      "machine_name_userchosen": "",
      "timestamp_machine_steamguard_enabled": 0,
      "authentication_exists_from_geoloc_before_mintime": null,
      "newauthentication": [],
      "authentication_exists_from_same_ip_before_mintime": null,
      "public_ipv4": <redacted>
    }
  ],
  "is_twofactor_enabled": true,
  "timestamp_twofactor_enabled": 1449281153,
  "is_phone_verified": null
}

[Ne3tCode]

Not fixed. Incorrect result for:
timestamp_steamguard_enabled == 0
or
2FA disabled or less than 7 days and timestamp_machine_steamguard_enabled == 0

[DoctorMcKay]

If it's 0, does that always mean that it was enabled before they started tracking?

[Ne3tCode]

I think so. I dont know what result for disabled SteamGuard.

[DoctorMcKay]

I ask (and am hesitant to change it) as I've seen a value of 0 in timestamp_machine_steamguard_enabled when the sentry is brand-new.