timeglyph 0.1.0

Forensic timestamp decipherment — decode, encode, and identify the many ways systems inscribe time, with scored, cited, ambiguity-first interpretation.
Documentation 
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

//! Hostile-input hardening (from an adversarial code review). The cardinal sin
//! for a forensic tool is silently turning invalid input into a plausible date.
#![allow(clippy::unwrap_used, clippy::expect_used)]

use timeglyph::{format, interpret};

#[test]
fn float_decode_rejects_non_finite_and_out_of_range() {
    let ole = format("ole").unwrap();
    assert!(ole.decode_float(f64::NAN).is_err(), "NaN must not decode");
    assert!(
        ole.decode_float(f64::INFINITY).is_err(),
        "inf must not decode"
    );
    assert!(
        ole.decode_float(1.0e30).is_err(),
        "absurd magnitude must not silently saturate to a date"
    );
    // a real value still works
    assert!(ole.decode_float(44197.0).unwrap().to_rfc3339().is_some());
}

#[test]
fn asn1_rejects_out_of_range_offset() {
    // +1260 has minute field 60 — not a valid offset; must NOT be silently
    // accepted (it would otherwise normalise to ~+13:00 and fabricate an instant).
    let cands = interpret::interpret_string("20200101000000+1260");
    assert!(
        !cands.iter().any(|c| c.format_id == "asn1_generalizedtime"),
        "invalid offset must not yield a GeneralizedTime reading: {cands:?}"
    );
    // a valid offset still parses
    let ok = interpret::interpret_string("20200101000000+0100");
    assert!(ok.iter().any(|c| c.format_id == "asn1_generalizedtime"));
}