vuke 0.3.0

Research tool for studying vulnerable Bitcoin key generation practices
Documentation 
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//! Double SHA256 transform - SHA256(SHA256(input)).

use sha2::{Digest, Sha256};
use super::{Input, Key, Transform};

pub struct DoubleSha256Transform;

impl Transform for DoubleSha256Transform {
    fn name(&self) -> &'static str {
        "double_sha256"
    }

    fn apply_batch(&self, inputs: &[Input], output: &mut Vec<(String, Key)>) {
        for input in inputs {
            // Double hash string representation
            let hash1 = Sha256::digest(input.string_val.as_bytes());
            let hash2 = Sha256::digest(&hash1);
            output.push((input.string_val.clone(), hash2.into()));

            // Double hash big-endian bytes
            if let Some(be) = input.bytes_be {
                let h1 = Sha256::digest(be);
                let h2 = Sha256::digest(&h1);
                output.push((input.string_val.clone(), h2.into()));
            }

            // Double hash little-endian bytes
            if let Some(le) = input.bytes_le {
                let h1 = Sha256::digest(le);
                let h2 = Sha256::digest(&h1);
                output.push((input.string_val.clone(), h2.into()));
            }
        }
    }
}