pub struct RawMd4;
use crate::hashes::{AttackModeType, HashModule, HashPattern, ParsedHash};
impl HashModule for RawMd4 {
fn name(&self) -> &'static str { "md4" }
fn mode(&self) -> u32 { 900 }
fn digest_words(&self) -> u32 { 4 }
fn needs_int64(&self) -> bool { false }
fn cpu_verify(&self, password: &str, _salt: &[u8], hash: &[u32]) -> bool {
let computed = raw_md4(password.as_bytes());
let mut computed_words = [0u32; 4];
for i in 0..4 {
computed_words[i] = u32::from_le_bytes(computed[i * 4..i * 4 + 4].try_into().unwrap());
}
computed_words == hash[..4]
}
fn shader_source(&self, mode: &AttackModeType) -> &'static str {
match mode {
AttackModeType::BruteForce => include_str!("../md4_crack.wgsl"),
AttackModeType::Mask => include_str!("../md4_mask.wgsl"),
AttackModeType::Wordlist => include_str!("../md4_wordlist.wgsl"),
}
}
fn detect_patterns(&self) -> &[HashPattern] {
&[HashPattern { prefix: None, hex_len: Some(32), priority: 95 }]
}
fn parse_hash_string(&self, s: &str) -> Result<ParsedHash, String> {
let clean = s.trim().strip_prefix("0x").unwrap_or(s.trim());
if clean.len() != 32 {
return Err(format!("Expected 32 hex chars for MD4, got {}", clean.len()));
}
let mut target = [0u32; 8];
for i in 0..4 {
let word = u32::from_str_radix(&clean[i * 8..i * 8 + 8], 16)
.map_err(|_| format!("Invalid hex at position {}", i * 8))?;
target[i] = word.swap_bytes();
}
Ok(ParsedHash {
hash_words: target,
extra_words: [0u32; 8],
salt: Vec::new(),
digest_words: 4,
})
}
}
pub fn raw_md4(data: &[u8]) -> [u8; 16] {
use md4::{Md4, Digest};
let mut hasher = Md4::new();
hasher.update(data);
let result = hasher.finalize();
let mut out = [0u8; 16];
out.copy_from_slice(&result);
out
}
#[test]
fn test_md4_hash_known() {
let hash = raw_md4(b"");
assert_eq!(hex::encode(hash), "31d6cfe0d16ae931b73c59d7e0c089c0");
}
#[test]
fn test_md4_hash_abc() {
let hash = raw_md4(b"abc");
assert_eq!(hex::encode(hash), "a448017aaf21d8525fc10ae87aa6729d");
}
#[test]
fn test_md4_hash_password() {
let hash = raw_md4(b"password");
assert_eq!(hex::encode(hash), "8a9d093f14f8701df17732b2bb182c74");
}