rust-bitcoin-unsafe-fast/fuzz/fuzz_targets/uint128_fuzz.rs

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extern crate bitcoin;
use std::str::FromStr;
use std::convert::Into;
fn do_test(data: &[u8]) {
macro_rules! read_ints {
($start: expr) => { {
let mut native = 0;
for c in data[$start..$start + 16].iter() {
native <<= 8;
native |= (*c) as u128;
}
// Note BE:
let uint128 = bitcoin::util::uint::Uint128::from(&[native as u64, (native >> 8*8) as u64][..]);
// Checking two conversion methods against each other
let mut slice = [0u8; 16];
slice.copy_from_slice(&data[$start..$start + 16]);
assert_eq!(uint128, bitcoin::util::uint::Uint128::from_be_bytes(slice));
(native, uint128)
} }
}
macro_rules! check_eq {
($native: expr, $uint: expr) => { {
assert_eq!(&[$native as u64, ($native >> 8*8) as u64], $uint.as_bytes());
} }
}
if data.len() != 16*2 { return; }
let (a_native, a) = read_ints!(0);
// Checks using only a:
for i in 0..128 {
check_eq!(a_native << i, a << i);
check_eq!(a_native >> i, a >> i);
}
assert_eq!(a_native as u64, a.low_u64());
assert_eq!(a_native as u32, a.low_u32());
assert_eq!(128 - a_native.leading_zeros() as usize, a.bits());
assert_eq!(a_native as u64, bitcoin::util::uint::Uint128::from_u64(a_native as u64).unwrap().low_u64());
let mut a_inc = a.clone();
a_inc.increment();
check_eq!(a_native.wrapping_add(1), a_inc);
// Checks with two numbers:
let (b_native, b) = read_ints!(16);
check_eq!(a_native.wrapping_add(b_native), a + b);
check_eq!(a_native.wrapping_sub(b_native), a - b);
if b_native != 0 {
check_eq!(a_native.wrapping_div(b_native), a / b);
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check_eq!(a_native.wrapping_rem(b_native), a % b);
}
check_eq!(a_native.wrapping_mul(b_native), a * b);
check_eq!(a_native & b_native, a & b);
check_eq!(a_native | b_native, a | b);
check_eq!(a_native ^ b_native, a ^ b);
check_eq!(a_native.wrapping_mul((b_native as u32) as u128), a.mul_u32(b.low_u32()));
assert_eq!(a_native > b_native, a > b);
assert_eq!(a_native >= b_native, a >= b);
assert_eq!(a_native < b_native, a < b);
assert_eq!(a_native <= b_native, a <= b);
}
#[cfg(feature = "afl")]
#[macro_use] extern crate afl;
#[cfg(feature = "afl")]
fn main() {
fuzz!(|data| {
do_test(&data);
});
}
#[cfg(feature = "honggfuzz")]
#[macro_use] extern crate honggfuzz;
#[cfg(feature = "honggfuzz")]
fn main() {
loop {
fuzz!(|data| {
do_test(data);
});
}
}
#[cfg(test)]
mod tests {
fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
let mut b = 0;
for (idx, c) in hex.as_bytes().iter().enumerate() {
b <<= 4;
match *c {
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b'A'..=b'F' => b |= c - b'A' + 10,
b'a'..=b'f' => b |= c - b'a' + 10,
b'0'..=b'9' => b |= c - b'0',
_ => panic!("Bad hex"),
}
if (idx & 1) == 1 {
out.push(b);
b = 0;
}
}
}
#[test]
fn duplicate_crash() {
let mut a = Vec::new();
extend_vec_from_hex("100000a70000000000000000000000000000000000000000000000000000000054", &mut a);
super::do_test(&a);
}
}