Struct botan::FPE

pub struct FPE { /* fields omitted */ }

Represents an instance of format preserving encryption

Examples

use std::str::FromStr;
let modulus = botan::MPI::from_str("1000000000").unwrap();
let key = vec![0; 32];
let rounds = 16;
let compat_mode = false;
let fpe = botan::FPE::new_fe1(&modulus, &key, rounds, compat_mode).unwrap();
let input = botan::MPI::from_str("9392024").unwrap();
let tweak = vec![1,2,3,4,5];
let ctext = fpe.encrypt(&input, &tweak).unwrap();
assert!(ctext < modulus);
let ptext = fpe.decrypt(&ctext, &tweak).unwrap();
assert_eq!(ptext, input);

Implementations

impl FPE

pub fn new_fe1(
    modulus: &MPI,
    key: &[u8],
    rounds: usize,
    compat_mode: bool
) -> Result<FPE>

Create a new FPE instance, FE1 scheme Rounds should be 16 or higher for best security

pub fn encrypt(&self, x: &MPI, tweak: &[u8]) -> Result<MPI>

Encrypt value under the FPE scheme using provided tweak

pub fn decrypt(&self, x: &MPI, tweak: &[u8]) -> Result<MPI>

Decrypt value under the FPE scheme using provided tweak

Trait Implementations

impl Debug for FPE

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for FPE

fn drop(&mut self)

Executes the destructor for this type.