third_party/rust_crates/vendor/nom-8.0.0/tests/overflow.rs

#![allow(clippy::unreadable_literal)]
#![cfg(target_pointer_width = "64")]

use nom::bytes::streaming::take;
#[cfg(feature = "alloc")]
use nom::multi::{length_data, many};
#[cfg(feature = "alloc")]
use nom::number::streaming::be_u64;
use nom::{Err, IResult, Needed, Parser};

// Parser definition

// We request a length that would trigger an overflow if computing consumed + requested
fn parser02(i: &[u8]) -> IResult<&[u8], (&[u8], &[u8])> {
  (take(1_usize), take(18446744073709551615_usize)).parse(i)
}

#[test]
fn overflow_incomplete_tuple() {
  assert_eq!(
    parser02(&b"3"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551615)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_length_bytes() {
  fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    many(0.., length_data(be_u64)).parse(i)
  }

  // Trigger an overflow in length_data
  assert_eq!(
    multi(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xff"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551615)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many0() {
  fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    many(0.., length_data(be_u64)).parse(i)
  }

  // Trigger an overflow in many0
  assert_eq!(
    multi(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many1() {
  fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    many(1.., length_data(be_u64)).parse(i)
  }

  // Trigger an overflow in many1
  assert_eq!(
    multi(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many_till() {
  use nom::{bytes::complete::tag, multi::many_till};

  #[allow(clippy::type_complexity)]
  fn multi(i: &[u8]) -> IResult<&[u8], (Vec<&[u8]>, &[u8])> {
    many_till(length_data(be_u64), tag("abc")).parse(i)
  }

  // Trigger an overflow in many_till
  assert_eq!(
    multi(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many_m_n() {
  fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    many(2..=4, length_data(be_u64)).parse(i)
  }

  // Trigger an overflow in many_m_n
  assert_eq!(
    multi(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_count() {
  use nom::multi::count;

  fn counter(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    count(length_data(be_u64), 2).parse(i)
  }

  assert_eq!(
    counter(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_length_count() {
  use nom::multi::length_count;
  use nom::number::streaming::be_u8;

  fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    length_count(be_u8, length_data(be_u64)).parse(i)
  }

  assert_eq!(
    multi(&b"\x04\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xee"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551598)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_length_data() {
  fn multi(i: &[u8]) -> IResult<&[u8], Vec<&[u8]>> {
    many(0.., length_data(be_u64)).parse(i)
  }

  assert_eq!(
    multi(&b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xff"[..]),
    Err(Err::Incomplete(Needed::new(18446744073709551615)))
  );
}