1 // Copyright 2018 Brian Smith.
2 //
3 // Permission to use, copy, modify, and/or distribute this software for any
4 // purpose with or without fee is hereby granted, provided that the above
5 // copyright notice and this permission notice appear in all copies.
6 //
7 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
10 // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14 
15 /// The IV for a single block encryption.
16 ///
17 /// Intentionally not `Clone` to ensure each is used only once.
18 #[repr(C)]
19 pub struct Iv([u8; IV_LEN]);
20 
21 pub const IV_LEN: usize = 16;
22 
23 impl Iv {
24     #[inline]
assume_unique_for_key(a: [u8; IV_LEN]) -> Self25     pub fn assume_unique_for_key(a: [u8; IV_LEN]) -> Self {
26         Self(a)
27     }
28 
29     #[inline]
into_bytes_less_safe(self) -> [u8; IV_LEN]30     pub fn into_bytes_less_safe(self) -> [u8; IV_LEN] {
31         self.0
32     }
33 }
34