devela::_dep::orion::util

Function secure_cmp

pub fn secure_cmp(a: &[u8], b: &[u8]) -> Result<(), UnknownCryptoError> ⓘ
Available on crate feature dep_orion only.
Expand description

Compare two equal length slices in constant time.

§About:

Compare two equal length slices, in constant time, using the subtle crate.

§Parameters:

  • a: The first slice used in the comparison.
  • b: The second slice used in the comparison.

§Errors:

An error will be returned if:

  • a and b do not have the same length.
  • a is not equal to b.

§Example:

use orion::util;

let mut rnd_bytes = [0u8; 64];
assert!(util::secure_cmp(&rnd_bytes, &[0u8; 64]).is_ok());

util::secure_rand_bytes(&mut rnd_bytes)?;
assert!(util::secure_cmp(&rnd_bytes, &[0u8; 64]).is_err());