cryptocol 0.19.7

A cryptographic library that includes big number arithmetic operations, hash algorithms, symmetric-key cryptographic encryption/decryption algorithms, asymmetric-key (public-key) cryptographic encryption/decryption algorithms, pseudo random number generators, etc. Hash algorithms includes MD4, MD5, SHA224, SHA256, SHA384, SHA512, SHA3, etc. Symmetric key encryption algorithms include DES, AES, etc. Public key encryption algorithms include RSA, ECC, etc.
Documentation 
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// Copyright 2025 PARK Youngho.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
// This file may not be copied, modified, or distributed
// except according to those terms.



use std::ptr::copy_nonoverlapping;

use crate::symmetric::Rijndael_Generic;
use crate::random::Key;


impl <const ROUND: usize, const NB: usize, const NK: usize, const IRREDUCIBLE: u8, const AFFINE_MUL: u64,
        const AFFINE_ADD: u8, const SR0: usize, const SR1: usize, const SR2: usize, const SR3: usize,
        const MC00: u8, const MC01: u8, const MC02: u8, const MC03: u8,
        const MC10: u8, const MC11: u8, const MC12: u8, const MC13: u8,
        const MC20: u8, const MC21: u8, const MC22: u8, const MC23: u8,
        const MC30: u8, const MC31: u8, const MC32: u8, const MC33: u8,
        const RC0: u32, const RC1: u32, const RC2: u32, const RC3: u32, const RC4: u32,
        const RC5: u32, const RC6: u32, const RC7: u32, const RC8: u32, const RC9: u32, const ROT: u32>
Key for Rijndael_Generic<ROUND, NB, NK, IRREDUCIBLE, AFFINE_MUL, AFFINE_ADD, SR0, SR1, SR2, SR3,
        MC00, MC01, MC02, MC03, MC10, MC11, MC12, MC13, MC20, MC21, MC22, MC23, MC30, MC31, MC32, MC33,
        RC0, RC1, RC2, RC3, RC4, RC5, RC6, RC7, RC8, RC9, ROT>
{
    fn change_key(&mut self, sugar: &[u64; 8])
    {
        let mut key = self.get_key();
        let mut seed = [0_u32; NK];
        let len = if NK < 16 {NK} else {16};
        unsafe { copy_nonoverlapping(sugar.as_ptr() as *const u32, seed.as_mut_ptr() as *mut u32, len); }
        let mut carry = 0_u32;
        let mut old: u32;
        for i in 0..NK
        {
            old = key[i];
            key[i] = key[i].wrapping_add(carry);
            carry = if key[i] < old {1} else {0};
            key[i] = key[i].wrapping_add(seed[i]);
            if carry == 0
                { carry = if key[i] < old {1} else {0}; }
        }
        self.set_original_key(&key);
    }
}