sanctum/tests/upgrade_security_test.rs

use sanctum::upgrade::{
    run_upgrade, verify_minisign_signature, UpgradeOptions, SANCTUM_RELEASE_PUBKEY,
};

#[test]
fn test_minisign_signature_valid() {
    let payload = b"Hello Sanctum Release 0.7.0 Security Testing\n";
    let sig_text = "\
untrusted comment: signature from minisign secret key\n\
RUSsVphPgr8155LCucDq8RzDmWMzWElzhBmHrS5p+qJlOCGU4AQpn2F28MVPFrnoGPYEHx7/6TlKg2b45DlYuBQ0+ASeLIzMLwc=\n\
trusted comment: timestamp:1789750897\tfile:test_payload.txt\thashed\n\
0l7KsNJkDTo2uOKL8UAiaJOWuhwhGTVZ5fn0JFMdxXE9riYixQO9YnBpSVqz8iCDhWrz8hJBnmUrIWnaRaXVCA==\n";

    let res = verify_minisign_signature(payload, sig_text, SANCTUM_RELEASE_PUBKEY);
    assert!(
        res.is_ok(),
        "Gültige Minisign-Signatur muss erfolgreich verifiziert werden: {:?}",
        res.err()
    );
}

#[test]
fn test_minisign_signature_tampered_payload() {
    let tampered_payload = b"Hello Sanctum Release 0.7.0 Tampered Payload!\n";
    let sig_text = "\
untrusted comment: signature from minisign secret key\n\
RUSsVphPgr8155LCucDq8RzDmWMzWElzhBmHrS5p+qJlOCGU4AQpn2F28MVPFrnoGPYEHx7/6TlKg2b45DlYuBQ0+ASeLIzMLwc=\n\
trusted comment: timestamp:1789750897\tfile:test_payload.txt\thashed\n\
0l7KsNJkDTo2uOKL8UAiaJOWuhwhGTVZ5fn0JFMdxXE9riYixQO9YnBpSVqz8iCDhWrz8hJBnmUrIWnaRaXVCA==\n";

    let res = verify_minisign_signature(tampered_payload, sig_text, SANCTUM_RELEASE_PUBKEY);
    assert!(
        res.is_err(),
        "Manipulierte Binärdaten müssen die Minisign-Prüfung verfehlen"
    );
    assert!(res.unwrap_err().to_string().contains("FEHLGESCHLAGEN"));
}

#[test]
fn test_minisign_signature_wrong_key() {
    let payload = b"Hello Sanctum Release 0.7.0 Security Testing\n";
    let sig_text = "\
untrusted comment: signature from minisign secret key\n\
RUSsVphPgr8155LCucDq8RzDmWMzWElzhBmHrS5p+qJlOCGU4AQpn2F28MVPFrnoGPYEHx7/6TlKg2b45DlYuBQ0+ASeLIzMLwc=\n\
trusted comment: timestamp:1789750897\tfile:test_payload.txt\thashed\n\
0l7KsNJkDTo2uOKL8UAiaJOWuhwhGTVZ5fn0JFMdxXE9riYixQO9YnBpSVqz8iCDhWrz8hJBnmUrIWnaRaXVCA==\n";

    // Ein anderer, unautorisierter Public Key
    let other_key = "RWSb0a70vF1X8qIjc7xi28Gmw+cIWbMipOy4L6ToJEUPkWDw3c0qIjc7";
    let res = verify_minisign_signature(payload, sig_text, other_key);
    assert!(
        res.is_err(),
        "Signaturprüfung mit fremdem Schlüssel muss fehlschlagen"
    );
}

#[test]
fn test_upgrade_blocks_unofficial_url_without_insecure_flag() {
    let options = UpgradeOptions {
        check_only: true,
        yes: false,
        force: false,
        base_url: "https://evil-attacker.org/sanctum".into(),
        insecure_url: false,
    };

    let res = run_upgrade(&options);
    assert!(
        res.is_err(),
        "Inoffizielle Server-URL ohne --insecure-url muss blockiert werden"
    );
    let err_msg = res.unwrap_err().to_string();
    assert!(
        err_msg.contains("Sicherheitsverstoß") || err_msg.contains("nicht vertrauenswürdig"),
        "Fehler muss Sicherheitsverstoß anzeigen: {err_msg}"
    );
}

#[test]
fn test_u01_reject_legacy_unhashed_signature() {
    let payload = b"Hello Sanctum Release 0.7.0 Security Testing\n";
    let sig_text = "\
untrusted comment: signature from minisign secret key\n\
RUSsVphPgr8155LCucDq8RzDmWMzWElzhBmHrS5p+qJlOCGU4AQpn2F28MVPFrnoGPYEHx7/6TlKg2b45DlYuBQ0+ASeLIzMLwc=\n\
trusted comment: timestamp:1789750897\tfile:test_payload.txt\thashed\n\
0l7KsNJkDTo2uOKL8UAiaJOWuhwhGTVZ5fn0JFMdxXE9riYixQO9YnBpSVqz8iCDhWrz8hJBnmUrIWnaRaXVCA==\n";

    // Gültige pre-hashed Signatur muss weiterhin erfolgreich geprüft werden
    assert!(verify_minisign_signature(payload, sig_text, SANCTUM_RELEASE_PUBKEY).is_ok());

    // Modifiziere die Signatur, um eine Legacy-Signatur (Ed statt ED) zu simulieren
    // In Base64 entspricht 'ED' (0x45, 0x44) dem Präfix 'RU'
    // 'Ed' (0x45, 0x64) entspricht in Base64 dem Präfix 'RW'
    let lines: Vec<&str> = sig_text.lines().collect();
    let mut sig_line = lines[1].to_string();
    assert!(sig_line.starts_with("RU"));
    sig_line.replace_range(0..2, "RW");

    let legacy_sig_text = format!(
        "{}\n{}\n{}\n{}\n",
        lines[0], sig_line, lines[2], lines[3]
    );

    let res = verify_minisign_signature(payload, &legacy_sig_text, SANCTUM_RELEASE_PUBKEY);
    assert!(
        res.is_err(),
        "U-01: Legacy-Signaturen (ohne Pre-Hashing) müssen strikt abgewiesen werden"
    );
}