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Diffstat (limited to 'vendor/zeroize/tests/zeroize.rs')
-rw-r--r-- | vendor/zeroize/tests/zeroize.rs | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/vendor/zeroize/tests/zeroize.rs b/vendor/zeroize/tests/zeroize.rs deleted file mode 100644 index 32281c1..0000000 --- a/vendor/zeroize/tests/zeroize.rs +++ /dev/null @@ -1,210 +0,0 @@ -//! zeroize integration tests. - -use std::{ - marker::{PhantomData, PhantomPinned}, - mem::{size_of, MaybeUninit}, - num::*, -}; -use zeroize::*; - -#[cfg(feature = "std")] -use std::ffi::CString; - -#[derive(Clone, Debug, PartialEq)] -struct ZeroizedOnDrop(u64); - -impl Drop for ZeroizedOnDrop { - fn drop(&mut self) { - self.0.zeroize(); - } -} - -#[test] -fn non_zero() { - macro_rules! non_zero_test { - ($($type:ty),+) => { - $(let mut value = <$type>::new(42).unwrap(); - value.zeroize(); - assert_eq!(value.get(), 1);)+ - }; - } - - non_zero_test!( - NonZeroI8, - NonZeroI16, - NonZeroI32, - NonZeroI64, - NonZeroI128, - NonZeroIsize, - NonZeroU8, - NonZeroU16, - NonZeroU32, - NonZeroU64, - NonZeroU128, - NonZeroUsize - ); -} - -#[test] -fn zeroize_byte_arrays() { - let mut arr = [42u8; 137]; - arr.zeroize(); - assert_eq!(arr.as_ref(), [0u8; 137].as_ref()); -} - -#[test] -fn zeroize_on_drop_byte_arrays() { - let mut arr = [ZeroizedOnDrop(42); 1]; - unsafe { core::ptr::drop_in_place(&mut arr) }; - assert_eq!(arr.as_ref(), [ZeroizedOnDrop(0); 1].as_ref()); -} - -#[test] -fn zeroize_maybeuninit_byte_arrays() { - let mut arr = [MaybeUninit::new(42u64); 64]; - arr.zeroize(); - let arr_init: [u64; 64] = unsafe { core::mem::transmute(arr) }; - assert_eq!(arr_init, [0u64; 64]); -} - -#[test] -fn zeroize_check_zerosize_types() { - // Since we assume these types have zero size, we test this holds for - // the current version of Rust. - assert_eq!(size_of::<()>(), 0); - assert_eq!(size_of::<PhantomPinned>(), 0); - assert_eq!(size_of::<PhantomData<usize>>(), 0); -} - -#[test] -fn zeroize_check_tuple() { - let mut tup1 = (42u8,); - tup1.zeroize(); - assert_eq!(tup1, (0u8,)); - - let mut tup2 = (42u8, 42u8); - tup2.zeroize(); - assert_eq!(tup2, (0u8, 0u8)); -} - -#[test] -fn zeroize_on_drop_check_tuple() { - let mut tup1 = (ZeroizedOnDrop(42),); - unsafe { core::ptr::drop_in_place(&mut tup1) }; - assert_eq!(tup1, (ZeroizedOnDrop(0),)); - - let mut tup2 = (ZeroizedOnDrop(42), ZeroizedOnDrop(42)); - unsafe { core::ptr::drop_in_place(&mut tup2) }; - assert_eq!(tup2, (ZeroizedOnDrop(0), ZeroizedOnDrop(0))); -} - -#[cfg(feature = "alloc")] -#[test] -fn zeroize_vec() { - let mut vec = vec![42; 3]; - vec.zeroize(); - assert!(vec.is_empty()); -} - -#[cfg(feature = "alloc")] -#[test] -fn zeroize_vec_entire_capacity() { - #[derive(Clone)] - struct PanicOnNonZeroDrop(u64); - - impl Zeroize for PanicOnNonZeroDrop { - fn zeroize(&mut self) { - self.0 = 0; - } - } - - impl Drop for PanicOnNonZeroDrop { - fn drop(&mut self) { - if self.0 != 0 { - panic!("dropped non-zeroized data"); - } - } - } - - // Ensure that the entire capacity of the vec is zeroized and that no unitinialized data - // is ever interpreted as initialized - let mut vec = vec![PanicOnNonZeroDrop(42); 2]; - - unsafe { - vec.set_len(1); - } - - vec.zeroize(); - - unsafe { - vec.set_len(2); - } - - drop(vec); -} - -#[cfg(feature = "alloc")] -#[test] -fn zeroize_string() { - let mut string = String::from("Hello, world!"); - string.zeroize(); - assert!(string.is_empty()); -} - -#[cfg(feature = "alloc")] -#[test] -fn zeroize_string_entire_capacity() { - let mut string = String::from("Hello, world!"); - string.truncate(5); - - string.zeroize(); - - // convert the string to a vec to easily access the unused capacity - let mut as_vec = string.into_bytes(); - unsafe { as_vec.set_len(as_vec.capacity()) }; - - assert!(as_vec.iter().all(|byte| *byte == 0)); -} - -// TODO(tarcieri): debug flaky test (with potential UB?) See: RustCrypto/utils#774 -#[cfg(feature = "std")] -#[ignore] -#[test] -fn zeroize_c_string() { - let mut cstring = CString::new("Hello, world!").expect("CString::new failed"); - let orig_len = cstring.as_bytes().len(); - let orig_ptr = cstring.as_bytes().as_ptr(); - cstring.zeroize(); - // This doesn't quite test that the original memory has been cleared, but only that - // cstring now owns an empty buffer - assert!(cstring.as_bytes().is_empty()); - for i in 0..orig_len { - unsafe { - // Using a simple deref, only one iteration of the loop is performed - // presumably because after zeroize, the internal buffer has a length of one/ - // `read_volatile` seems to "fix" this - // Note that this is very likely UB - assert_eq!(orig_ptr.add(i).read_volatile(), 0); - } - } -} - -#[cfg(feature = "alloc")] -#[test] -fn zeroize_box() { - let mut boxed_arr = Box::new([42u8; 3]); - boxed_arr.zeroize(); - assert_eq!(boxed_arr.as_ref(), &[0u8; 3]); -} - -#[cfg(feature = "alloc")] -#[test] -fn asref() { - let mut buffer: Zeroizing<Vec<u8>> = Default::default(); - let _asmut: &mut [u8] = buffer.as_mut(); - let _asref: &[u8] = buffer.as_ref(); - - let mut buffer: Zeroizing<Box<[u8]>> = Default::default(); - let _asmut: &mut [u8] = buffer.as_mut(); - let _asref: &[u8] = buffer.as_ref(); -} |