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Code Issues Packages Projects Releases Wiki Activity

Logarithmic PIN failure delay of 3 seconds

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M66B
2021-12-21 08:56:39 +01:00
parent 105a9a2a92
commit 44b5d9120e
4 changed files with 18 additions and 8 deletions
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20
app/src/main/java/eu/faircode/email/Helper.java
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@@ -161,7 +161,7 @@ public class Helper {
static final long MIN_REQUIRED_SPACE = 250 * 1024L * 1024L;
static final int MAX_REDIRECTS = 5; // https://www.freesoft.org/CIE/RFC/1945/46.htm
static final int AUTOLOCK_GRACE = 7; // seconds
static final long PIN_FAILURE_DELAY = 10 * 1000L;
static final long PIN_FAILURE_DELAY = 3; // seconds
static final String PGP_BEGIN_MESSAGE = "-----BEGIN PGP MESSAGE-----";
static final String PGP_END_MESSAGE = "-----END PGP MESSAGE-----";
@@ -2053,11 +2053,18 @@ public class Helper {
Log.i("Authenticate PIN ok=" + pin.equals(entered));
if (pin.equals(entered)) {
prefs.edit().remove("pin_failure").apply();
prefs.edit()
.remove("pin_failure_at")
.remove("pin_failure_count")
.apply();
setAuthenticated(activity);
ApplicationEx.getMainHandler().post(authenticated);
} else {
prefs.edit().putLong("pin_failure", new Date().getTime()).apply();
int count = prefs.getInt("pin_failure_count", 0) + 1;
prefs.edit()
.putLong("pin_failure_at", new Date().getTime())
.putInt("pin_failure_count", count)
.apply();
ApplicationEx.getMainHandler().post(cancelled);
}
}
@@ -2102,8 +2109,11 @@ public class Helper {
dialog.show();
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
long pin_failure = prefs.getLong("pin_failure", 0);
long delay = pin_failure + PIN_FAILURE_DELAY - new Date().getTime();
long pin_failure_at = prefs.getLong("pin_failure_at", 0);
int pin_failure_count = prefs.getInt("pin_failure_count", 0);
long wait = (long) Math.pow(PIN_FAILURE_DELAY, pin_failure_count) * 1000L;
long delay = pin_failure_at + wait - new Date().getTime();
Log.i("PIN wait=" + wait + " delay=" + delay);
ApplicationEx.getMainHandler().postDelayed(new Runnable() {
@Override
public void run() {