cryptocol 0.19.10

A cryptographic library that includes big number arithmetic operations, hash algorithms, symmetric-key encryption/decryption algorithms, asymmetric-key (public-key) 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 2024, 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 crate::hash::SHA1_Generic;
use crate::random::{ PRNG_Engine, SALT };


impl<const H0: u32, const H1: u32, const H2: u32, const H3: u32,
    const H4: u32, const ROUND: usize, const K0: u32, const K1: u32,
    const K2: u32, const K3: u32, const RL1: u32, const RL5: u32, const RL30: u32>
PRNG_Engine for SHA1_Generic<5, H0, H1, H2, H3, H4,
                                ROUND, K0, K1, K2, K3, RL1, RL5, RL30>
{
    fn sow_array(&mut self, message: &[u64; 8], original: &[u64; 8])
    {
        let mut m = [0_u64; 8];
        for i in 0..8
            { m[i] = message[i] ^ original[i]; }
        self.digest_array(&m);
    }

    fn harvest(&mut self, count: u64, message: &[u64; 8]) -> [u64; 8]
    {
        self.digest_array(message);
        let mut salt = [0_u64; 4];
        if count == 0
        {
            for i in 0..4
                { salt[i] = SALT.rotate_left(i as u32); }
        }

        self.tangle(salt[0]);
        let a: [u32; 5] = self.get_hash_value_in_array();
        self.tangle(salt[1]);
        let b: [u32; 5] = self.get_hash_value_in_array();
        self.tangle(salt[2]);
        let c: [u32; 5] = self.get_hash_value_in_array();
        self.tangle(salt[3]);
        let d: [u32; 5] = self.get_hash_value_in_array();
        
        let mut res = [0_u64; 8];
        for i in 0..5
            { res[i] = ((a[i] as u64) << 32) | (b[i] as u64); }
        for i in 0..3
            { res[i+5] = ((c[i] as u64) << 32) | (d[i] as u64); }
        res
    }
}