diff options
Diffstat (limited to 'src/md4.rs')
| -rw-r--r-- | src/md4.rs | 130 |
1 files changed, 58 insertions, 72 deletions
@@ -1,40 +1,30 @@ -#[cfg(test)] use serialize::hex::ToHex; +#[cfg(test)] +use rustc_serialize::hex::ToHex; -pub fn md4 (bytes: &[u8]) -> [u8; 16] { +pub fn md4(bytes: &[u8]) -> [u8; 16] { md4_with_state( bytes, - [ - 0x67452301, - 0xEFCDAB89, - 0x98BADCFE, - 0x10325476, - ], - bytes.len() as u64 + [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476], + bytes.len() as u64, ) } -pub fn pad_md4 (bytes: &[u8], len: u64) -> Vec<u8> { - return bytes - .iter() - .map(|x| *x) - .chain(md4_padding(len)) - .collect(); +pub fn pad_md4(bytes: &[u8], len: u64) -> Vec<u8> { + return bytes.iter().map(|x| *x).chain(md4_padding(len)).collect(); } -pub fn md4_padding (len: u64) -> Vec<u8> { +pub fn md4_padding(len: u64) -> Vec<u8> { let ml: u64 = len * 8; - let ml_bytes: [u8; 8] = unsafe { - ::std::mem::transmute(ml.to_le()) - }; + let ml_bytes: [u8; 8] = unsafe { std::mem::transmute(ml.to_le()) }; return [0x80u8] .iter() .map(|x| *x) - .chain(::std::iter::repeat(0x00).take((119 - (len % 64) as usize) % 64)) + .chain(std::iter::repeat(0x00).take((119 - (len % 64) as usize) % 64)) .chain(ml_bytes.iter().map(|x| *x)) .collect(); } -fn round1 (offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { +fn round1(offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { let a = (4 - offset as usize) % 4; let b = (5 - offset as usize) % 4; let c = (6 - offset as usize) % 4; @@ -46,7 +36,7 @@ fn round1 (offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { .rotate_left(s) } -fn round2 (offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { +fn round2(offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { let a = (4 - offset as usize) % 4; let b = (5 - offset as usize) % 4; let c = (6 - offset as usize) % 4; @@ -59,7 +49,7 @@ fn round2 (offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { .rotate_left(s) } -fn round3 (offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { +fn round3(offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { let a = (4 - offset as usize) % 4; let b = (5 - offset as usize) % 4; let c = (6 - offset as usize) % 4; @@ -72,67 +62,66 @@ fn round3 (offset: u32, x: u32, s: u32, h: &mut [u32; 4]) { .rotate_left(s) } -pub fn md4_with_state (bytes: &[u8], mut h: [u32; 4], len: u64) -> [u8; 16] { +pub fn md4_with_state(bytes: &[u8], mut h: [u32; 4], len: u64) -> [u8; 16] { for chunk in pad_md4(bytes, len).chunks(64) { - let chunk_words: &[u32; 16] = unsafe { - ::std::mem::transmute(chunk.as_ptr()) - }; - let mut x: [u32; 16] = unsafe { ::std::mem::uninitialized() }; + let chunk_words: &[u32; 16] = + unsafe { std::mem::transmute(chunk.as_ptr()) }; + let mut x: [u32; 16] = unsafe { std::mem::uninitialized() }; for i in 0..16 { x[i] = u32::from_le(chunk_words[i]); } let mut hh = h; - round1(0, x[ 0], 3, &mut hh); - round1(1, x[ 1], 7, &mut hh); - round1(2, x[ 2], 11, &mut hh); - round1(3, x[ 3], 19, &mut hh); - round1(0, x[ 4], 3, &mut hh); - round1(1, x[ 5], 7, &mut hh); - round1(2, x[ 6], 11, &mut hh); - round1(3, x[ 7], 19, &mut hh); - round1(0, x[ 8], 3, &mut hh); - round1(1, x[ 9], 7, &mut hh); + round1(0, x[0], 3, &mut hh); + round1(1, x[1], 7, &mut hh); + round1(2, x[2], 11, &mut hh); + round1(3, x[3], 19, &mut hh); + round1(0, x[4], 3, &mut hh); + round1(1, x[5], 7, &mut hh); + round1(2, x[6], 11, &mut hh); + round1(3, x[7], 19, &mut hh); + round1(0, x[8], 3, &mut hh); + round1(1, x[9], 7, &mut hh); round1(2, x[10], 11, &mut hh); round1(3, x[11], 19, &mut hh); - round1(0, x[12], 3, &mut hh); - round1(1, x[13], 7, &mut hh); + round1(0, x[12], 3, &mut hh); + round1(1, x[13], 7, &mut hh); round1(2, x[14], 11, &mut hh); round1(3, x[15], 19, &mut hh); - round2(0, x[ 0], 3, &mut hh); - round2(1, x[ 4], 5, &mut hh); - round2(2, x[ 8], 9, &mut hh); + round2(0, x[0], 3, &mut hh); + round2(1, x[4], 5, &mut hh); + round2(2, x[8], 9, &mut hh); round2(3, x[12], 13, &mut hh); - round2(0, x[ 1], 3, &mut hh); - round2(1, x[ 5], 5, &mut hh); - round2(2, x[ 9], 9, &mut hh); + round2(0, x[1], 3, &mut hh); + round2(1, x[5], 5, &mut hh); + round2(2, x[9], 9, &mut hh); round2(3, x[13], 13, &mut hh); - round2(0, x[ 2], 3, &mut hh); - round2(1, x[ 6], 5, &mut hh); - round2(2, x[10], 9, &mut hh); + round2(0, x[2], 3, &mut hh); + round2(1, x[6], 5, &mut hh); + round2(2, x[10], 9, &mut hh); round2(3, x[14], 13, &mut hh); - round2(0, x[ 3], 3, &mut hh); - round2(1, x[ 7], 5, &mut hh); - round2(2, x[11], 9, &mut hh); + round2(0, x[3], 3, &mut hh); + round2(1, x[7], 5, &mut hh); + round2(2, x[11], 9, &mut hh); round2(3, x[15], 13, &mut hh); - round3(0, x[ 0], 3, &mut hh); - round3(1, x[ 8], 9, &mut hh); - round3(2, x[ 4], 11, &mut hh); + round3(0, x[0], 3, &mut hh); + round3(1, x[8], 9, &mut hh); + round3(2, x[4], 11, &mut hh); round3(3, x[12], 15, &mut hh); - round3(0, x[ 2], 3, &mut hh); - round3(1, x[10], 9, &mut hh); - round3(2, x[ 6], 11, &mut hh); + round3(0, x[2], 3, &mut hh); + round3(1, x[10], 9, &mut hh); + round3(2, x[6], 11, &mut hh); round3(3, x[14], 15, &mut hh); - round3(0, x[ 1], 3, &mut hh); - round3(1, x[ 9], 9, &mut hh); - round3(2, x[ 5], 11, &mut hh); + round3(0, x[1], 3, &mut hh); + round3(1, x[9], 9, &mut hh); + round3(2, x[5], 11, &mut hh); round3(3, x[13], 15, &mut hh); - round3(0, x[ 3], 3, &mut hh); - round3(1, x[11], 9, &mut hh); - round3(2, x[ 7], 11, &mut hh); + round3(0, x[3], 3, &mut hh); + round3(1, x[11], 9, &mut hh); + round3(2, x[7], 11, &mut hh); round3(3, x[15], 15, &mut hh); h[0] = h[0].wrapping_add(hh[0]); @@ -145,20 +134,17 @@ pub fn md4_with_state (bytes: &[u8], mut h: [u32; 4], len: u64) -> [u8; 16] { *word = word.to_le(); } - return unsafe { ::std::mem::transmute(h) }; + return unsafe { std::mem::transmute(h) }; } -pub fn md4_mac (bytes: &[u8], key: &[u8]) -> [u8; 16] { - let full_bytes: Vec<u8> = key - .iter() - .chain(bytes.iter()) - .map(|x| *x) - .collect(); +pub fn md4_mac(bytes: &[u8], key: &[u8]) -> [u8; 16] { + let full_bytes: Vec<u8> = + key.iter().chain(bytes.iter()).map(|x| *x).collect(); return md4(&full_bytes[..]); } #[test] -fn test_md4 () { +fn test_md4() { let tests = [ ( &b""[..], |