Know how shared_secret and identity_secret generate the verification code needed to log in to steam

[Aurora15304]

If I know identity_secret and shared_secret, what should I do to generate steam login verification code

[dyc3]

This is the format of an maFile. You can replace the fields in it with your own information, and then use steamguard import --files <path to file> to import it.

{
    "account_name": "hydrastar2",
    "steam_id": 76561199155706900,
    "serial_number": "5958223490807687449",
    "revocation_code": "R12345",
    "shared_secret": "E2jwbqbphb3ddAAgPaU+ZFqDZFA=",
    "token_gid": "2de62c507a1fb878",
    "identity_secret": "DaW/TQJeh1vzq4FHr0a57HgS6EA=",
    "uri": "otpauth://totp/Steam:hydrastar2?secret=CNUPA3VG5GC33XLUAAQD3JJ6MRNIGZCQ&issuer=Steam",
    "device_id": "android:eaf2f3a4-7828-4f03-9182-9a7f1ae44d22",
    "secret_1": "7DLxRiDJLirJdTmRiu+IIXZlQKA=",
    "tokens": null,
}

Alternatively, if you have an maFile from SDA, you can import it with steamguard import --sda --files <path to file>

If you're looking for a more technical explanation, this is how 2fa codes are generated and this is how the identity_secret is used for confirmations.