Remove MD4.
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Palmer Cox
parent
ca132006a0
commit
ff9e573a67
@ -74,7 +74,6 @@ pub mod url;
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pub mod ebml;
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pub mod getopts;
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pub mod json;
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pub mod md4;
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pub mod tempfile;
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pub mod glob;
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pub mod term;
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@ -1,150 +0,0 @@
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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[allow(missing_doc)];
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use std::vec;
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struct Quad {
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a: u32,
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b: u32,
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c: u32,
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d: u32
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}
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/// Calculates the md4 hash of the given slice of bytes, returning the 128-bit
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/// result as a quad of u32's
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pub fn md4(msg: &[u8]) -> Quad {
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// subtle: if orig_len is merely uint, then the code below
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// which performs shifts by 32 bits or more has undefined
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// results.
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let orig_len: u64 = (msg.len() * 8u) as u64;
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// pad message
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let mut msg = vec::append(msg.to_owned(), [0x80u8]);
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let mut bitlen = orig_len + 8u64;
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while (bitlen + 64u64) % 512u64 > 0u64 {
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msg.push(0u8);
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bitlen += 8u64;
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}
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// append length
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let mut i = 0u64;
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while i < 8u64 {
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msg.push((orig_len >> (i * 8u64)) as u8);
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i += 1u64;
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}
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let mut a = 0x67452301u32;
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let mut b = 0xefcdab89u32;
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let mut c = 0x98badcfeu32;
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let mut d = 0x10325476u32;
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fn rot(r: int, x: u32) -> u32 {
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let r = r as u32;
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(x << r) | (x >> (32u32 - r))
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}
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let mut i = 0u;
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let e = msg.len();
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let mut x = vec::from_elem(16u, 0u32);
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while i < e {
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let (aa, bb, cc, dd) = (a, b, c, d);
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let mut j = 0u;
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let mut base = i;
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while j < 16u {
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x[j] = (msg[base] as u32) + (msg[base + 1u] as u32 << 8u32) +
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(msg[base + 2u] as u32 << 16u32) +
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(msg[base + 3u] as u32 << 24u32);
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j += 1u; base += 4u;
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}
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let mut j = 0u;
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while j < 16u {
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a = rot(3, a + ((b & c) | (!b & d)) + x[j]);
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j += 1u;
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d = rot(7, d + ((a & b) | (!a & c)) + x[j]);
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j += 1u;
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c = rot(11, c + ((d & a) | (!d & b)) + x[j]);
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j += 1u;
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b = rot(19, b + ((c & d) | (!c & a)) + x[j]);
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j += 1u;
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}
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let mut j = 0u;
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let q = 0x5a827999u32;
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while j < 4u {
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a = rot(3, a + ((b & c) | ((b & d) | (c & d))) + x[j] + q);
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d = rot(5, d + ((a & b) | ((a & c) | (b & c))) + x[j + 4u] + q);
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c = rot(9, c + ((d & a) | ((d & b) | (a & b))) + x[j + 8u] + q);
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b = rot(13, b + ((c & d) | ((c & a) | (d & a))) + x[j + 12u] + q);
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j += 1u;
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}
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let mut j = 0u;
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let q = 0x6ed9eba1u32;
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while j < 8u {
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let jj = if j > 2u { j - 3u } else { j };
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a = rot(3, a + (b ^ c ^ d) + x[jj] + q);
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d = rot(9, d + (a ^ b ^ c) + x[jj + 8u] + q);
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c = rot(11, c + (d ^ a ^ b) + x[jj + 4u] + q);
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b = rot(15, b + (c ^ d ^ a) + x[jj + 12u] + q);
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j += 2u;
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}
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a += aa; b += bb; c += cc; d += dd;
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i += 64u;
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}
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return Quad {a: a, b: b, c: c, d: d};
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}
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/// Calculates the md4 hash of a slice of bytes, returning the hex-encoded
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/// version of the hash
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pub fn md4_str(msg: &[u8]) -> ~str {
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let Quad {a, b, c, d} = md4(msg);
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fn app(a: u32, b: u32, c: u32, d: u32, f: &fn(u32)) {
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f(a); f(b); f(c); f(d);
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}
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let mut result = ~"";
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do app(a, b, c, d) |u| {
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let mut i = 0u32;
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while i < 4u32 {
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let byte = (u >> (i * 8u32)) as u8;
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if byte <= 16u8 {
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result.push_char('0')
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}
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result.push_str((byte as uint).to_str_radix(16u));
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i += 1u32;
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}
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}
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result
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}
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/// Calculates the md4 hash of a string, returning the hex-encoded version of
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/// the hash
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pub fn md4_text(msg: &str) -> ~str { md4_str(msg.as_bytes()) }
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#[test]
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fn test_md4() {
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assert_eq!(md4_text(""), ~"31d6cfe0d16ae931b73c59d7e0c089c0");
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assert_eq!(md4_text("a"), ~"bde52cb31de33e46245e05fbdbd6fb24");
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assert_eq!(md4_text("abc"), ~"a448017aaf21d8525fc10ae87aa6729d");
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assert!(md4_text("message digest") ==
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~"d9130a8164549fe818874806e1c7014b");
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assert!(md4_text("abcdefghijklmnopqrstuvwxyz") ==
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~"d79e1c308aa5bbcdeea8ed63df412da9");
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assert!(md4_text(
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
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0123456789") == ~"043f8582f241db351ce627e153e7f0e4");
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assert!(md4_text("1234567890123456789012345678901234567890123456789\
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0123456789012345678901234567890") ==
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~"e33b4ddc9c38f2199c3e7b164fcc0536");
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}
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