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integer overflow checks for defense

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This commit is contained in:
Aravinth Manivannan 2021-06-07 17:17:48 +05:30
parent d0b3416a54
commit 285be4d936
Signed by: realaravinth
GPG key ID: AD9F0F08E855ED88
2 changed files with 57 additions and 7 deletions
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62
src/defense.rs
View file

@ -206,12 +206,8 @@ impl Defense {
}
/// Get current level's visitor threshold
pub fn visitor_threshold(&self) -> Option<u32> {
if let Some(level) = self.levels.get(self.current_visitor_threshold) {
Some(level.visitor_threshold)
} else {
None
}
pub fn visitor_threshold(&self) -> u32 {
self.levels[self.current_visitor_threshold].difficulty_factor
}
}
@ -299,6 +295,60 @@ mod tests {
assert_eq!(err, Err(CaptchaError::DecreaseingDifficultyFactor));
}
#[test]
fn checking_for_integer_overflow() {
let mut defense = DefenseBuilder::default()
.add_level(
LevelBuilder::default()
.visitor_threshold(5)
.difficulty_factor(5)
.unwrap()
.build()
.unwrap(),
)
.unwrap()
.add_level(
LevelBuilder::default()
.visitor_threshold(10)
.difficulty_factor(50)
.unwrap()
.build()
.unwrap(),
)
.unwrap()
.add_level(
LevelBuilder::default()
.visitor_threshold(20)
.difficulty_factor(60)
.unwrap()
.build()
.unwrap(),
)
.unwrap()
.add_level(
LevelBuilder::default()
.visitor_threshold(30)
.difficulty_factor(65)
.unwrap()
.build()
.unwrap(),
)
.unwrap()
.build()
.unwrap();
for _ in 0..500 {
defense.tighten_up();
}
defense.get_difficulty();
for _ in 0..500000 {
defense.tighten_up();
}
defense.get_difficulty();
}
fn get_defense() -> Defense {
DefenseBuilder::default()
.add_level(

2
src/mcaptcha.rs
View file

@ -83,7 +83,7 @@ impl MCaptcha {
#[inline]
pub fn add_visitor(&mut self) {
self.visitor_threshold += 1;
if self.visitor_threshold > self.defense.visitor_threshold().unwrap() {
if self.visitor_threshold > self.defense.visitor_threshold() {
self.defense.tighten_up();
} else {
self.defense.loosen_up();