gnome-shell-extension-totp/totp.js at master · dkosmari/gnome-shell-extension-totp · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
/*  totp.js
 * Copyright (C) 2025  Daniel K. O.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

// See RFC 6238

import * as OTP from './otp.js';


// strings will be translated by gettext in the frontend
const _ = x => x;


function now()
{
    return new Date().getTime() / 1000;
}


export default
class TOTP extends OTP.OTP {

    constructor({
        issuer = '',
        name = '',
        secret = '',
        digits = 6,
        period = 30,
        algorithm = 'SHA-1',
        uri = null
    } = {})
    {
        super();

        this.type = 'TOTP';

        if (uri) {
            let {
                host = null,
                issuer = '',
                name = '',
                secret = '',
                digits = 6,
                period = 30,
                algorithm = 'SHA-1'
            } = OTP.parseURI(uri);
            if (host.toLowerCase() != "totp")
                throw new Error(_('URI host should be "totp"'));
            this.issuer    = issuer;
            this.name      = name;
            this.secret    = secret;
            this.digits    = parseInt(digits);
            this.period    = parseInt(period);
            this.algorithm = OTP.normalized_algorithm(algorithm);
        } else {
            this.issuer    = issuer;
            this.name      = name;
            this.secret    = secret;
            this.digits    = parseInt(digits);
            this.period    = parseInt(period);
            this.algorithm = OTP.normalized_algorithm(algorithm);
        }
    }


    code(time = now())
    {
        const counter = Math.trunc(time / this.period);
        return super.code(counter);
    }


    // return code and expiry
    code_and_expiry()
    {
        const t = now();
        const code = this.code(t);
        const expiry = (Math.trunc(t / this.period) + 1) * this.period;
        return [code, expiry];
    }


    uri()
    {
        let args = {};
        if (this.period != 30)
            args.period = this.period;
        return super.uri(args);
    }


    // return all members as strings, as required by libsecret
    fields_non_destructive()
    {
        let result = super.fields_non_destructive();
        result.period = this.period.toString();
        return result;
    }

}; // class TOTP