diff --git a/CHANGELOG.md b/CHANGELOG.md index 6f42376..3844f7d 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,34 +1,34 @@ -# Changelog - -All notable changes to this project will be documented in this file. - -The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), -and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). - -## [0.2.1] - 2023-05-04 - -### Fixed - -- Fix overflow panic in debug builds when total length of data exceeds 1408534 bytes - (~1.34MB). See [fcdf710](https://github.com/vthib/tlsh/commit/fcdf710ac5730e68f4e4bf987623bc0e9b8e0819). - -## [0.2.0] - 2023-01-01 - -### Added - -- Added TLSH difference computation (with the `diff` feature). -- The crate is now `no_std`. -- Tests now use reference files from the original TLSH repo to check conformance. -- `TlshCore` renamed to `TlshBuilder`, new `Tlsh` object to compute hashes and differences. - -### Fixed - -- Fixed tests when run on Windows. - -### Removed - -- Remove `showvers` parameter in hash function. Hashes now always return the `T1` prefix. - -## [0.1.0] - 2022-12-30 - -Initial release +# Changelog + +All notable changes to this project will be documented in this file. + +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). + +## [0.2.1] - 2023-05-04 + +### Fixed + +- Fix overflow panic in debug builds when total length of data exceeds 1408534 bytes + (~1.34MB). See [fcdf710](https://github.com/vthib/tlsh/commit/fcdf710ac5730e68f4e4bf987623bc0e9b8e0819). + +## [0.2.0] - 2023-01-01 + +### Added + +- Added TLSH difference computation (with the `diff` feature). +- The crate is now `no_std`. +- Tests now use reference files from the original TLSH repo to check conformance. +- `TlshCore` renamed to `TlshBuilder`, new `Tlsh` object to compute hashes and differences. + +### Fixed + +- Fixed tests when run on Windows. + +### Removed + +- Remove `showvers` parameter in hash function. Hashes now always return the `T1` prefix. + +## [0.1.0] - 2022-12-30 + +Initial release diff --git a/src/quartile.rs b/src/quartile.rs index 54796de..8f62add 100644 --- a/src/quartile.rs +++ b/src/quartile.rs @@ -1,132 +1,132 @@ -use core::cmp::Ordering; - -use crate::BUCKETS; - -pub fn get_quartiles(bucket: &[u32; BUCKETS]) -> (u32, u32, u32) { - let mut short_cut_left = [0; EFF_BUCKETS]; - let mut short_cut_right = [0; EFF_BUCKETS]; - let p1 = EFF_BUCKETS / 4 - 1; - let p2 = EFF_BUCKETS / 2 - 1; - let p3 = EFF_BUCKETS - EFF_BUCKETS / 4 - 1; - let end = EFF_BUCKETS - 1; - let mut q1 = 0; - let q2; - let mut q3 = 0; - - // Safety: this expect is eliminated at compile time, as the compiler can - // trivially verify that EFF_BUCKETS <= BUCKETS. - let mut bucket_copy: [u32; EFF_BUCKETS] = bucket[..EFF_BUCKETS] - .try_into() - .expect("EFF_BUCKETS is bigger than BUCKETS"); - - let mut spl = 0; - let mut spr = 0; - let mut l = 0; - let mut r = end; - loop { - let ret = partition(&mut bucket_copy, l, r); - match ret.cmp(&p2) { - Ordering::Greater => { - r = ret - 1; - short_cut_right[spr] = ret; - spr += 1; - } - Ordering::Less => { - l = ret + 1; - short_cut_left[spl] = ret; - spl += 1; - } - Ordering::Equal => { - q2 = bucket_copy[p2]; - break; - } - } - } - - short_cut_left[spl] = p2 - 1; - short_cut_right[spr] = p2 + 1; - - let mut l = 0; - for mut r in short_cut_left.iter().take(spl + 1).copied() { - match r.cmp(&p1) { - Ordering::Greater => { - loop { - let ret = partition(&mut bucket_copy, l, r); - match ret.cmp(&p1) { - Ordering::Greater => r = ret - 1, - Ordering::Less => l = ret + 1, - Ordering::Equal => { - q1 = bucket_copy[p1]; - break; - } - } - } - break; - } - Ordering::Less => { - l = r; - } - Ordering::Equal => { - q1 = bucket_copy[p1]; - break; - } - } - } - - let mut r = end; - for mut l in short_cut_right.iter().take(spr + 1).copied() { - match l.cmp(&p3) { - Ordering::Less => { - loop { - let ret = partition(&mut bucket_copy, l, r); - match ret.cmp(&p3) { - Ordering::Greater => r = ret - 1, - Ordering::Less => l = ret + 1, - Ordering::Equal => { - q3 = bucket_copy[p3]; - break; - } - } - } - break; - } - Ordering::Greater => { - r = l; - } - Ordering::Equal => { - q3 = bucket_copy[p3]; - break; - } - } - } - - (q1, q2, q3) -} - -fn partition(buf: &mut [u32], left: usize, right: usize) -> usize { - if left == right { - return left; - } - if left + 1 == right { - if buf[left] > buf[right] { - buf.swap(left, right); - } - return left; - } - - let mut ret = left; - let pivot = (left + right) >> 1; - let val = buf[pivot]; - buf.swap(pivot, right); - - for i in left..right { - if buf[i] < val { - buf.swap(ret, i); - ret += 1; - } - } - buf[right] = buf[ret]; - buf[ret] = val; - - ret -} +use core::cmp::Ordering; + +use crate::BUCKETS; + +pub fn get_quartiles(bucket: &[u32; BUCKETS]) -> (u32, u32, u32) { + let mut short_cut_left = [0; EFF_BUCKETS]; + let mut short_cut_right = [0; EFF_BUCKETS]; + let p1 = EFF_BUCKETS / 4 - 1; + let p2 = EFF_BUCKETS / 2 - 1; + let p3 = EFF_BUCKETS - EFF_BUCKETS / 4 - 1; + let end = EFF_BUCKETS - 1; + let mut q1 = 0; + let q2; + let mut q3 = 0; + + // Safety: this expect is eliminated at compile time, as the compiler can + // trivially verify that EFF_BUCKETS <= BUCKETS. + let mut bucket_copy: [u32; EFF_BUCKETS] = bucket[..EFF_BUCKETS] + .try_into() + .expect("EFF_BUCKETS is bigger than BUCKETS"); + + let mut spl = 0; + let mut spr = 0; + let mut l = 0; + let mut r = end; + loop { + let ret = partition(&mut bucket_copy, l, r); + match ret.cmp(&p2) { + Ordering::Greater => { + r = ret - 1; + short_cut_right[spr] = ret; + spr += 1; + } + Ordering::Less => { + l = ret + 1; + short_cut_left[spl] = ret; + spl += 1; + } + Ordering::Equal => { + q2 = bucket_copy[p2]; + break; + } + } + } + + short_cut_left[spl] = p2 - 1; + short_cut_right[spr] = p2 + 1; + + let mut l = 0; + for mut r in short_cut_left.iter().take(spl + 1).copied() { + match r.cmp(&p1) { + Ordering::Greater => { + loop { + let ret = partition(&mut bucket_copy, l, r); + match ret.cmp(&p1) { + Ordering::Greater => r = ret - 1, + Ordering::Less => l = ret + 1, + Ordering::Equal => { + q1 = bucket_copy[p1]; + break; + } + } + } + break; + } + Ordering::Less => { + l = r; + } + Ordering::Equal => { + q1 = bucket_copy[p1]; + break; + } + } + } + + let mut r = end; + for mut l in short_cut_right.iter().take(spr + 1).copied() { + match l.cmp(&p3) { + Ordering::Less => { + loop { + let ret = partition(&mut bucket_copy, l, r); + match ret.cmp(&p3) { + Ordering::Greater => r = ret - 1, + Ordering::Less => l = ret + 1, + Ordering::Equal => { + q3 = bucket_copy[p3]; + break; + } + } + } + break; + } + Ordering::Greater => { + r = l; + } + Ordering::Equal => { + q3 = bucket_copy[p3]; + break; + } + } + } + + (q1, q2, q3) +} + +fn partition(buf: &mut [u32], left: usize, right: usize) -> usize { + if left == right { + return left; + } + if left + 1 == right { + if buf[left] > buf[right] { + buf.swap(left, right); + } + return left; + } + + let mut ret = left; + let pivot = (left + right) >> 1; + let val = buf[pivot]; + buf.swap(pivot, right); + + for i in left..right { + if buf[i] < val { + buf.swap(ret, i); + ret += 1; + } + } + buf[right] = buf[ret]; + buf[ret] = val; + + ret +} diff --git a/src/util.rs b/src/util.rs index 6c9dfc4..68717b0 100644 --- a/src/util.rs +++ b/src/util.rs @@ -1,2998 +1,2998 @@ -const TOPVAL: [u32; 170] = [ - 1, 2, 3, 5, 7, 11, 17, 25, 38, 57, 86, 129, 194, 291, 437, 656, 854, 1110, 1443, 1876, 2439, - 3171, 3475, 3823, 4205, 4626, 5088, 5597, 6157, 6772, 7450, 8195, 9014, 9916, 10907, 11998, - 13198, 14518, 15970, 17567, 19323, 21256, 23382, 25720, 28292, 31121, 34233, 37656, 41422, - 45564, 50121, 55133, 60646, 66711, 73382, 80721, 88793, 97672, 107439, 118183, 130002, 143002, - 157302, 173032, 190335, 209369, 230306, 253337, 278670, 306538, 337191, 370911, 408002, 448802, - 493682, 543050, 597356, 657091, 722800, 795081, 874589, 962048, 1058252, 1164078, 1280486, - 1408534, 1549388, 1704327, 1874759, 2062236, 2268459, 2495305, 2744836, 3019320, 3321252, - 3653374, 4018711, 4420582, 4862641, 5348905, 5883796, 6472176, 7119394, 7831333, 8614467, - 9475909, 10423501, 11465851, 12612437, 13873681, 15261050, 16787154, 18465870, 20312458, - 22343706, 24578077, 27035886, 29739474, 32713425, 35984770, 39583245, 43541573, 47895730, - 52685306, 57953837, 63749221, 70124148, 77136564, 84850228, 93335252, 102668779, 112935659, - 124229227, 136652151, 150317384, 165349128, 181884040, 200072456, 220079703, 242087671, - 266296456, 292926096, 322218735, 354440623, 389884688, 428873168, 471760495, 518936559, - 570830240, 627913311, 690704607, 759775136, 835752671, 919327967, 1011260767, 1112386880, - 1223623232, 1345985727, 1480584256, 1628642751, 1791507135, 1970657856, 2167723648, 2384496256, - 2622945920, 2885240448, 3173764736, 3491141248, 3840255616, 4224281216, -]; - -pub fn l_capturing(len: u32) -> u8 { - let mut idx: u8 = 85; - let mut bottom = 0; - let mut top = 170; - - loop { - if idx == 0 { - return idx; - } - if (len <= TOPVAL[usize::from(idx)]) && (len > TOPVAL[usize::from(idx - 1)]) { - return idx; - } - if len < TOPVAL[usize::from(idx)] { - top = idx - 1; - } else { - bottom = idx + 1; - } - idx = (((bottom as u16) + (top as u16)) / 2) as u8; - } -} - -pub fn swap_byte(c: u8) -> u8 { - let mut byte = ((c & 0xF0) >> 4) & 0x0F; - byte |= ((c & 0x0F) << 4) & 0xF0; - byte -} - -#[cfg(feature = "diff")] -pub fn mod_diff(x: u8, y: u8, r: u32) -> i32 { - let dl: i32; - let dr: i32; - - let x = x as u32; - let y = y as u32; - if y > x { - dl = (y - x) as i32; - dr = (x + r - y) as i32; - } else { - dl = (x - y) as i32; - dr = (y + r - x) as i32; - } - core::cmp::min(dl, dr) -} - -#[cfg(feature = "diff")] -pub fn h_distance(x: &[u8], y: &[u8]) -> i32 { - x.iter() - .zip(y.iter()) - .map(|(a, b)| i32::from(BIT_PAIRS_DIFF_TABLE[usize::from(*a)][usize::from(*b)])) - .sum() -} - -#[cfg(feature = "diff")] -const BIT_PAIRS_DIFF_TABLE: [[u8; 256]; 256] = [ - [ - 0, 1, 2, 6, 1, 2, 3, 7, 2, 3, 4, 8, 6, 7, 8, 12, 1, 2, 3, 7, 2, 3, 4, 8, 3, 4, 5, 9, 7, 8, - 9, 13, 2, 3, 4, 8, 3, 4, 5, 9, 4, 5, 6, 10, 8, 9, 10, 14, 6, 7, 8, 12, 7, 8, 9, 13, 8, 9, - 10, 14, 12, 13, 14, 18, 1, 2, 3, 7, 2, 3, 4, 8, 3, 4, 5, 9, 7, 8, 9, 13, 2, 3, 4, 8, 3, 4, - 5, 9, 4, 5, 6, 10, 8, 9, 10, 14, 3, 4, 5, 9, 4, 5, 6, 10, 5, 6, 7, 11, 9, 10, 11, 15, 7, 8, - 9, 13, 8, 9, 10, 14, 9, 10, 11, 15, 13, 14, 15, 19, 2, 3, 4, 8, 3, 4, 5, 9, 4, 5, 6, 10, 8, - 9, 10, 14, 3, 4, 5, 9, 4, 5, 6, 10, 5, 6, 7, 11, 9, 10, 11, 15, 4, 5, 6, 10, 5, 6, 7, 11, - 6, 7, 8, 12, 10, 11, 12, 16, 8, 9, 10, 14, 9, 10, 11, 15, 10, 11, 12, 16, 14, 15, 16, 20, - 6, 7, 8, 12, 7, 8, 9, 13, 8, 9, 10, 14, 12, 13, 14, 18, 7, 8, 9, 13, 8, 9, 10, 14, 9, 10, - 11, 15, 13, 14, 15, 19, 8, 9, 10, 14, 9, 10, 11, 15, 10, 11, 12, 16, 14, 15, 16, 20, 12, - 13, 14, 18, 13, 14, 15, 19, 14, 15, 16, 20, 18, 19, 20, 24, - ], - [ - 1, 0, 1, 2, 2, 1, 2, 3, 3, 2, 3, 4, 7, 6, 7, 8, 2, 1, 2, 3, 3, 2, 3, 4, 4, 3, 4, 5, 8, 7, - 8, 9, 3, 2, 3, 4, 4, 3, 4, 5, 5, 4, 5, 6, 9, 8, 9, 10, 7, 6, 7, 8, 8, 7, 8, 9, 9, 8, 9, 10, - 13, 12, 13, 14, 2, 1, 2, 3, 3, 2, 3, 4, 4, 3, 4, 5, 8, 7, 8, 9, 3, 2, 3, 4, 4, 3, 4, 5, 5, - 4, 5, 6, 9, 8, 9, 10, 4, 3, 4, 5, 5, 4, 5, 6, 6, 5, 6, 7, 10, 9, 10, 11, 8, 7, 8, 9, 9, 8, - 9, 10, 10, 9, 10, 11, 14, 13, 14, 15, 3, 2, 3, 4, 4, 3, 4, 5, 5, 4, 5, 6, 9, 8, 9, 10, 4, - 3, 4, 5, 5, 4, 5, 6, 6, 5, 6, 7, 10, 9, 10, 11, 5, 4, 5, 6, 6, 5, 6, 7, 7, 6, 7, 8, 11, 10, - 11, 12, 9, 8, 9, 10, 10, 9, 10, 11, 11, 10, 11, 12, 15, 14, 15, 16, 7, 6, 7, 8, 8, 7, 8, 9, - 9, 8, 9, 10, 13, 12, 13, 14, 8, 7, 8, 9, 9, 8, 9, 10, 10, 9, 10, 11, 14, 13, 14, 15, 9, 8, - 9, 10, 10, 9, 10, 11, 11, 10, 11, 12, 15, 14, 15, 16, 13, 12, 13, 14, 14, 13, 14, 15, 15, - 14, 15, 16, 19, 18, 19, 20, - ], - [ - 2, 1, 0, 1, 3, 2, 1, 2, 4, 3, 2, 3, 8, 7, 6, 7, 3, 2, 1, 2, 4, 3, 2, 3, 5, 4, 3, 4, 9, 8, - 7, 8, 4, 3, 2, 3, 5, 4, 3, 4, 6, 5, 4, 5, 10, 9, 8, 9, 8, 7, 6, 7, 9, 8, 7, 8, 10, 9, 8, 9, - 14, 13, 12, 13, 3, 2, 1, 2, 4, 3, 2, 3, 5, 4, 3, 4, 9, 8, 7, 8, 4, 3, 2, 3, 5, 4, 3, 4, 6, - 5, 4, 5, 10, 9, 8, 9, 5, 4, 3, 4, 6, 5, 4, 5, 7, 6, 5, 6, 11, 10, 9, 10, 9, 8, 7, 8, 10, 9, - 8, 9, 11, 10, 9, 10, 15, 14, 13, 14, 4, 3, 2, 3, 5, 4, 3, 4, 6, 5, 4, 5, 10, 9, 8, 9, 5, 4, - 3, 4, 6, 5, 4, 5, 7, 6, 5, 6, 11, 10, 9, 10, 6, 5, 4, 5, 7, 6, 5, 6, 8, 7, 6, 7, 12, 11, - 10, 11, 10, 9, 8, 9, 11, 10, 9, 10, 12, 11, 10, 11, 16, 15, 14, 15, 8, 7, 6, 7, 9, 8, 7, 8, - 10, 9, 8, 9, 14, 13, 12, 13, 9, 8, 7, 8, 10, 9, 8, 9, 11, 10, 9, 10, 15, 14, 13, 14, 10, 9, - 8, 9, 11, 10, 9, 10, 12, 11, 10, 11, 16, 15, 14, 15, 14, 13, 12, 13, 15, 14, 13, 14, 16, - 15, 14, 15, 20, 19, 18, 19, - ], - [ - 6, 2, 1, 0, 7, 3, 2, 1, 8, 4, 3, 2, 12, 8, 7, 6, 7, 3, 2, 1, 8, 4, 3, 2, 9, 5, 4, 3, 13, 9, - 8, 7, 8, 4, 3, 2, 9, 5, 4, 3, 10, 6, 5, 4, 14, 10, 9, 8, 12, 8, 7, 6, 13, 9, 8, 7, 14, 10, - 9, 8, 18, 14, 13, 12, 7, 3, 2, 1, 8, 4, 3, 2, 9, 5, 4, 3, 13, 9, 8, 7, 8, 4, 3, 2, 9, 5, 4, - 3, 10, 6, 5, 4, 14, 10, 9, 8, 9, 5, 4, 3, 10, 6, 5, 4, 11, 7, 6, 5, 15, 11, 10, 9, 13, 9, - 8, 7, 14, 10, 9, 8, 15, 11, 10, 9, 19, 15, 14, 13, 8, 4, 3, 2, 9, 5, 4, 3, 10, 6, 5, 4, 14, - 10, 9, 8, 9, 5, 4, 3, 10, 6, 5, 4, 11, 7, 6, 5, 15, 11, 10, 9, 10, 6, 5, 4, 11, 7, 6, 5, - 12, 8, 7, 6, 16, 12, 11, 10, 14, 10, 9, 8, 15, 11, 10, 9, 16, 12, 11, 10, 20, 16, 15, 14, - 12, 8, 7, 6, 13, 9, 8, 7, 14, 10, 9, 8, 18, 14, 13, 12, 13, 9, 8, 7, 14, 10, 9, 8, 15, 11, - 10, 9, 19, 15, 14, 13, 14, 10, 9, 8, 15, 11, 10, 9, 16, 12, 11, 10, 20, 16, 15, 14, 18, 14, - 13, 12, 19, 15, 14, 13, 20, 16, 15, 14, 24, 20, 19, 18, - ], - [ - 1, 2, 3, 7, 0, 1, 2, 6, 1, 2, 3, 7, 2, 3, 4, 8, 2, 3, 4, 8, 1, 2, 3, 7, 2, 3, 4, 8, 3, 4, - 5, 9, 3, 4, 5, 9, 2, 3, 4, 8, 3, 4, 5, 9, 4, 5, 6, 10, 7, 8, 9, 13, 6, 7, 8, 12, 7, 8, 9, - 13, 8, 9, 10, 14, 2, 3, 4, 8, 1, 2, 3, 7, 2, 3, 4, 8, 3, 4, 5, 9, 3, 4, 5, 9, 2, 3, 4, 8, - 3, 4, 5, 9, 4, 5, 6, 10, 4, 5, 6, 10, 3, 4, 5, 9, 4, 5, 6, 10, 5, 6, 7, 11, 8, 9, 10, 14, - 7, 8, 9, 13, 8, 9, 10, 14, 9, 10, 11, 15, 3, 4, 5, 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5, 4, 5, 6, 4, 3, 4, 5, 3, 2, 3, 4, 4, 3, 4, 5, 10, 9, 10, 11, 9, 8, 9, 10, - 8, 7, 8, 9, 9, 8, 9, 10, 6, 5, 6, 7, 5, 4, 5, 6, 4, 3, 4, 5, 5, 4, 5, 6, 5, 4, 5, 6, 4, 3, - 4, 5, 3, 2, 3, 4, 4, 3, 4, 5, 4, 3, 4, 5, 3, 2, 3, 4, 2, 1, 2, 3, 3, 2, 3, 4, 9, 8, 9, 10, - 8, 7, 8, 9, 7, 6, 7, 8, 8, 7, 8, 9, 5, 4, 5, 6, 4, 3, 4, 5, 3, 2, 3, 4, 4, 3, 4, 5, 4, 3, - 4, 5, 3, 2, 3, 4, 2, 1, 2, 3, 3, 2, 3, 4, 3, 2, 3, 4, 2, 1, 2, 3, 1, 0, 1, 2, 2, 1, 2, 3, - ], - [ - 16, 15, 14, 15, 15, 14, 13, 14, 14, 13, 12, 13, 15, 14, 13, 14, 12, 11, 10, 11, 11, 10, 9, - 10, 10, 9, 8, 9, 11, 10, 9, 10, 11, 10, 9, 10, 10, 9, 8, 9, 9, 8, 7, 8, 10, 9, 8, 9, 10, 9, - 8, 9, 9, 8, 7, 8, 8, 7, 6, 7, 9, 8, 7, 8, 12, 11, 10, 11, 11, 10, 9, 10, 10, 9, 8, 9, 11, - 10, 9, 10, 8, 7, 6, 7, 7, 6, 5, 6, 6, 5, 4, 5, 7, 6, 5, 6, 7, 6, 5, 6, 6, 5, 4, 5, 5, 4, 3, - 4, 6, 5, 4, 5, 6, 5, 4, 5, 5, 4, 3, 4, 4, 3, 2, 3, 5, 4, 3, 4, 11, 10, 9, 10, 10, 9, 8, 9, - 9, 8, 7, 8, 10, 9, 8, 9, 7, 6, 5, 6, 6, 5, 4, 5, 5, 4, 3, 4, 6, 5, 4, 5, 6, 5, 4, 5, 5, 4, - 3, 4, 4, 3, 2, 3, 5, 4, 3, 4, 5, 4, 3, 4, 4, 3, 2, 3, 3, 2, 1, 2, 4, 3, 2, 3, 10, 9, 8, 9, - 9, 8, 7, 8, 8, 7, 6, 7, 9, 8, 7, 8, 6, 5, 4, 5, 5, 4, 3, 4, 4, 3, 2, 3, 5, 4, 3, 4, 5, 4, - 3, 4, 4, 3, 2, 3, 3, 2, 1, 2, 4, 3, 2, 3, 4, 3, 2, 3, 3, 2, 1, 2, 2, 1, 0, 1, 3, 2, 1, 2, - ], - [ - 20, 16, 15, 14, 19, 15, 14, 13, 18, 14, 13, 12, 19, 15, 14, 13, 16, 12, 11, 10, 15, 11, 10, - 9, 14, 10, 9, 8, 15, 11, 10, 9, 15, 11, 10, 9, 14, 10, 9, 8, 13, 9, 8, 7, 14, 10, 9, 8, 14, - 10, 9, 8, 13, 9, 8, 7, 12, 8, 7, 6, 13, 9, 8, 7, 16, 12, 11, 10, 15, 11, 10, 9, 14, 10, 9, - 8, 15, 11, 10, 9, 12, 8, 7, 6, 11, 7, 6, 5, 10, 6, 5, 4, 11, 7, 6, 5, 11, 7, 6, 5, 10, 6, - 5, 4, 9, 5, 4, 3, 10, 6, 5, 4, 10, 6, 5, 4, 9, 5, 4, 3, 8, 4, 3, 2, 9, 5, 4, 3, 15, 11, 10, - 9, 14, 10, 9, 8, 13, 9, 8, 7, 14, 10, 9, 8, 11, 7, 6, 5, 10, 6, 5, 4, 9, 5, 4, 3, 10, 6, 5, - 4, 10, 6, 5, 4, 9, 5, 4, 3, 8, 4, 3, 2, 9, 5, 4, 3, 9, 5, 4, 3, 8, 4, 3, 2, 7, 3, 2, 1, 8, - 4, 3, 2, 14, 10, 9, 8, 13, 9, 8, 7, 12, 8, 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3, 4, 8, 1, 2, 3, - 7, 6, 7, 8, 12, 2, 3, 4, 8, 1, 2, 3, 7, 0, 1, 2, 6, - ], - [ - 19, 18, 19, 20, 15, 14, 15, 16, 14, 13, 14, 15, 13, 12, 13, 14, 15, 14, 15, 16, 11, 10, 11, - 12, 10, 9, 10, 11, 9, 8, 9, 10, 14, 13, 14, 15, 10, 9, 10, 11, 9, 8, 9, 10, 8, 7, 8, 9, 13, - 12, 13, 14, 9, 8, 9, 10, 8, 7, 8, 9, 7, 6, 7, 8, 15, 14, 15, 16, 11, 10, 11, 12, 10, 9, 10, - 11, 9, 8, 9, 10, 11, 10, 11, 12, 7, 6, 7, 8, 6, 5, 6, 7, 5, 4, 5, 6, 10, 9, 10, 11, 6, 5, - 6, 7, 5, 4, 5, 6, 4, 3, 4, 5, 9, 8, 9, 10, 5, 4, 5, 6, 4, 3, 4, 5, 3, 2, 3, 4, 14, 13, 14, - 15, 10, 9, 10, 11, 9, 8, 9, 10, 8, 7, 8, 9, 10, 9, 10, 11, 6, 5, 6, 7, 5, 4, 5, 6, 4, 3, 4, - 5, 9, 8, 9, 10, 5, 4, 5, 6, 4, 3, 4, 5, 3, 2, 3, 4, 8, 7, 8, 9, 4, 3, 4, 5, 3, 2, 3, 4, 2, - 1, 2, 3, 13, 12, 13, 14, 9, 8, 9, 10, 8, 7, 8, 9, 7, 6, 7, 8, 9, 8, 9, 10, 5, 4, 5, 6, 4, - 3, 4, 5, 3, 2, 3, 4, 8, 7, 8, 9, 4, 3, 4, 5, 3, 2, 3, 4, 2, 1, 2, 3, 7, 6, 7, 8, 3, 2, 3, - 4, 2, 1, 2, 3, 1, 0, 1, 2, - ], - [ - 20, 19, 18, 19, 16, 15, 14, 15, 15, 14, 13, 14, 14, 13, 12, 13, 16, 15, 14, 15, 12, 11, 10, - 11, 11, 10, 9, 10, 10, 9, 8, 9, 15, 14, 13, 14, 11, 10, 9, 10, 10, 9, 8, 9, 9, 8, 7, 8, 14, - 13, 12, 13, 10, 9, 8, 9, 9, 8, 7, 8, 8, 7, 6, 7, 16, 15, 14, 15, 12, 11, 10, 11, 11, 10, 9, - 10, 10, 9, 8, 9, 12, 11, 10, 11, 8, 7, 6, 7, 7, 6, 5, 6, 6, 5, 4, 5, 11, 10, 9, 10, 7, 6, - 5, 6, 6, 5, 4, 5, 5, 4, 3, 4, 10, 9, 8, 9, 6, 5, 4, 5, 5, 4, 3, 4, 4, 3, 2, 3, 15, 14, 13, - 14, 11, 10, 9, 10, 10, 9, 8, 9, 9, 8, 7, 8, 11, 10, 9, 10, 7, 6, 5, 6, 6, 5, 4, 5, 5, 4, 3, - 4, 10, 9, 8, 9, 6, 5, 4, 5, 5, 4, 3, 4, 4, 3, 2, 3, 9, 8, 7, 8, 5, 4, 3, 4, 4, 3, 2, 3, 3, - 2, 1, 2, 14, 13, 12, 13, 10, 9, 8, 9, 9, 8, 7, 8, 8, 7, 6, 7, 10, 9, 8, 9, 6, 5, 4, 5, 5, - 4, 3, 4, 4, 3, 2, 3, 9, 8, 7, 8, 5, 4, 3, 4, 4, 3, 2, 3, 3, 2, 1, 2, 8, 7, 6, 7, 4, 3, 2, - 3, 3, 2, 1, 2, 2, 1, 0, 1, - ], - [ - 24, 20, 19, 18, 20, 16, 15, 14, 19, 15, 14, 13, 18, 14, 13, 12, 20, 16, 15, 14, 16, 12, 11, - 10, 15, 11, 10, 9, 14, 10, 9, 8, 19, 15, 14, 13, 15, 11, 10, 9, 14, 10, 9, 8, 13, 9, 8, 7, - 18, 14, 13, 12, 14, 10, 9, 8, 13, 9, 8, 7, 12, 8, 7, 6, 20, 16, 15, 14, 16, 12, 11, 10, 15, - 11, 10, 9, 14, 10, 9, 8, 16, 12, 11, 10, 12, 8, 7, 6, 11, 7, 6, 5, 10, 6, 5, 4, 15, 11, 10, - 9, 11, 7, 6, 5, 10, 6, 5, 4, 9, 5, 4, 3, 14, 10, 9, 8, 10, 6, 5, 4, 9, 5, 4, 3, 8, 4, 3, 2, - 19, 15, 14, 13, 15, 11, 10, 9, 14, 10, 9, 8, 13, 9, 8, 7, 15, 11, 10, 9, 11, 7, 6, 5, 10, - 6, 5, 4, 9, 5, 4, 3, 14, 10, 9, 8, 10, 6, 5, 4, 9, 5, 4, 3, 8, 4, 3, 2, 13, 9, 8, 7, 9, 5, - 4, 3, 8, 4, 3, 2, 7, 3, 2, 1, 18, 14, 13, 12, 14, 10, 9, 8, 13, 9, 8, 7, 12, 8, 7, 6, 14, - 10, 9, 8, 10, 6, 5, 4, 9, 5, 4, 3, 8, 4, 3, 2, 13, 9, 8, 7, 9, 5, 4, 3, 8, 4, 3, 2, 7, 3, - 2, 1, 12, 8, 7, 6, 8, 4, 3, 2, 7, 3, 2, 1, 6, 2, 1, 0, - ], -]; +const TOPVAL: [u32; 170] = [ + 1, 2, 3, 5, 7, 11, 17, 25, 38, 57, 86, 129, 194, 291, 437, 656, 854, 1110, 1443, 1876, 2439, + 3171, 3475, 3823, 4205, 4626, 5088, 5597, 6157, 6772, 7450, 8195, 9014, 9916, 10907, 11998, + 13198, 14518, 15970, 17567, 19323, 21256, 23382, 25720, 28292, 31121, 34233, 37656, 41422, + 45564, 50121, 55133, 60646, 66711, 73382, 80721, 88793, 97672, 107439, 118183, 130002, 143002, + 157302, 173032, 190335, 209369, 230306, 253337, 278670, 306538, 337191, 370911, 408002, 448802, + 493682, 543050, 597356, 657091, 722800, 795081, 874589, 962048, 1058252, 1164078, 1280486, + 1408534, 1549388, 1704327, 1874759, 2062236, 2268459, 2495305, 2744836, 3019320, 3321252, + 3653374, 4018711, 4420582, 4862641, 5348905, 5883796, 6472176, 7119394, 7831333, 8614467, + 9475909, 10423501, 11465851, 12612437, 13873681, 15261050, 16787154, 18465870, 20312458, + 22343706, 24578077, 27035886, 29739474, 32713425, 35984770, 39583245, 43541573, 47895730, + 52685306, 57953837, 63749221, 70124148, 77136564, 84850228, 93335252, 102668779, 112935659, + 124229227, 136652151, 150317384, 165349128, 181884040, 200072456, 220079703, 242087671, + 266296456, 292926096, 322218735, 354440623, 389884688, 428873168, 471760495, 518936559, + 570830240, 627913311, 690704607, 759775136, 835752671, 919327967, 1011260767, 1112386880, + 1223623232, 1345985727, 1480584256, 1628642751, 1791507135, 1970657856, 2167723648, 2384496256, + 2622945920, 2885240448, 3173764736, 3491141248, 3840255616, 4224281216, +]; + +pub fn l_capturing(len: u32) -> u8 { + let mut idx: u8 = 85; + let mut bottom = 0; + let mut top = 170; + + loop { + if idx == 0 { + return idx; + } + if (len <= TOPVAL[usize::from(idx)]) && (len > TOPVAL[usize::from(idx - 1)]) { + return idx; + } + if len < TOPVAL[usize::from(idx)] { + top = idx - 1; + } else { + bottom = idx + 1; + } + idx = (((bottom as u16) + (top as u16)) / 2) as u8; + } +} + +pub fn swap_byte(c: u8) -> u8 { + let mut byte = ((c & 0xF0) >> 4) & 0x0F; + byte |= ((c & 0x0F) << 4) & 0xF0; + byte +} + +#[cfg(feature = "diff")] +pub fn mod_diff(x: u8, y: u8, r: u32) -> i32 { + let dl: i32; + let dr: i32; + + let x = x as u32; + let y = y as u32; + if y > x { + dl = (y - x) as i32; + dr = (x + r - y) as i32; + } else { + dl = (x - y) as i32; + dr = (y + r - x) as i32; + } + core::cmp::min(dl, dr) +} + +#[cfg(feature = "diff")] +pub fn h_distance(x: &[u8], y: &[u8]) -> i32 { + x.iter() + .zip(y.iter()) + .map(|(a, b)| i32::from(BIT_PAIRS_DIFF_TABLE[usize::from(*a)][usize::from(*b)])) + .sum() +} + +#[cfg(feature = "diff")] +const BIT_PAIRS_DIFF_TABLE: [[u8; 256]; 256] = [ + [ + 0, 1, 2, 6, 1, 2, 3, 7, 2, 3, 4, 8, 6, 7, 8, 12, 1, 2, 3, 7, 2, 3, 4, 8, 3, 4, 5, 9, 7, 8, + 9, 13, 2, 3, 4, 8, 3, 4, 5, 9, 4, 5, 6, 10, 8, 9, 10, 14, 6, 7, 8, 12, 7, 8, 9, 13, 8, 9, + 10, 14, 12, 13, 14, 18, 1, 2, 3, 7, 2, 3, 4, 8, 3, 4, 5, 9, 7, 8, 9, 13, 2, 3, 4, 8, 3, 4, + 5, 9, 4, 5, 6, 10, 8, 9, 10, 14, 3, 4, 5, 9, 4, 5, 6, 10, 5, 6, 7, 11, 9, 10, 11, 15, 7, 8, + 9, 13, 8, 9, 10, 14, 9, 10, 11, 15, 13, 14, 15, 19, 2, 3, 4, 8, 3, 4, 5, 9, 4, 5, 6, 10, 8, + 9, 10, 14, 3, 4, 5, 9, 4, 5, 6, 10, 5, 6, 7, 11, 9, 10, 11, 15, 4, 5, 6, 10, 5, 6, 7, 11, + 6, 7, 8, 12, 10, 11, 12, 16, 8, 9, 10, 14, 9, 10, 11, 15, 10, 11, 12, 16, 14, 15, 16, 20, + 6, 7, 8, 12, 7, 8, 9, 13, 8, 9, 10, 14, 12, 13, 14, 18, 7, 8, 9, 13, 8, 9, 10, 14, 9, 10, + 11, 15, 13, 14, 15, 19, 8, 9, 10, 14, 9, 10, 11, 15, 10, 11, 12, 16, 14, 15, 16, 20, 12, + 13, 14, 18, 13, 14, 15, 19, 14, 15, 16, 20, 18, 19, 20, 24, + ], + [ + 1, 0, 1, 2, 2, 1, 2, 3, 3, 2, 3, 4, 7, 6, 7, 8, 2, 1, 2, 3, 3, 2, 3, 4, 4, 3, 4, 5, 8, 7, + 8, 9, 3, 2, 3, 4, 4, 3, 4, 5, 5, 4, 5, 6, 9, 8, 9, 10, 7, 6, 7, 8, 8, 7, 8, 9, 9, 8, 9, 10, + 13, 12, 13, 14, 2, 1, 2, 3, 3, 2, 3, 4, 4, 3, 4, 5, 8, 7, 8, 9, 3, 2, 3, 4, 4, 3, 4, 5, 5, + 4, 5, 6, 9, 8, 9, 10, 4, 3, 4, 5, 5, 4, 5, 6, 6, 5, 6, 7, 10, 9, 10, 11, 8, 7, 8, 9, 9, 8, + 9, 10, 10, 9, 10, 11, 14, 13, 14, 15, 3, 2, 3, 4, 4, 3, 4, 5, 5, 4, 5, 6, 9, 8, 9, 10, 4, + 3, 4, 5, 5, 4, 5, 6, 6, 5, 6, 7, 10, 9, 10, 11, 5, 4, 5, 6, 6, 5, 6, 7, 7, 6, 7, 8, 11, 10, + 11, 12, 9, 8, 9, 10, 10, 9, 10, 11, 11, 10, 11, 12, 15, 14, 15, 16, 7, 6, 7, 8, 8, 7, 8, 9, + 9, 8, 9, 10, 13, 12, 13, 14, 8, 7, 8, 9, 9, 8, 9, 10, 10, 9, 10, 11, 14, 13, 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7, 9, 5, 4, 3, 8, 4, 3, 2, 7, 3, + 2, 1, 12, 8, 7, 6, 8, 4, 3, 2, 7, 3, 2, 1, 6, 2, 1, 0, + ], +]; diff --git a/tests/it/diff.rs b/tests/it/diff.rs index 506d5e5..4a0b6dd 100644 --- a/tests/it/diff.rs +++ b/tests/it/diff.rs @@ -1,123 +1,123 @@ -use std::collections::HashMap; -use std::io::BufRead; -use std::path::{Path, PathBuf}; - -fn test_diff(path: &str, compute_diff: F) -where - F: Fn(&Path, &Path) -> i32, -{ - let f = std::fs::File::open(path).unwrap(); - let reader = std::io::BufReader::new(f); - for line in reader.lines() { - let line = line.unwrap(); - let mut line = line.split('\t'); - let path1 = line.next().unwrap(); - let path2 = line.next().unwrap(); - let expected_score = line.next().unwrap().parse::().unwrap(); - - assert_eq!( - compute_diff(Path::new(path1), Path::new(path2)), - expected_score - ); - } -} - -fn build_cache(f: F) -> HashMap -where - F: Fn(&[u8]) -> T, -{ - glob::glob("tests/assets/tlsh/example_data/*") - .unwrap() - .map(|path| { - let path = path.unwrap(); - let contents = std::fs::read(&path).unwrap(); - ( - path.strip_prefix("tests/assets/tlsh") - .unwrap() - .to_path_buf(), - f(&contents), - ) - }) - .collect() -} - -macro_rules! do_diff_test { - ($testname:ident, $name:expr, $type:ty, $len_diff:expr) => { - #[test] - fn $testname() { - let cache = build_cache(|contents| { - let mut tlsh = <$type>::new(); - tlsh.update(contents); - tlsh.build().unwrap() - }); - - test_diff( - &format!( - "tests/assets/tlsh/exp/example_data.{}.xref.scores_EXP", - $name - ), - |path1, path2| { - let tlsh1 = cache.get(path1).unwrap(); - let tlsh2 = cache.get(path2).unwrap(); - tlsh1.diff(&tlsh2, $len_diff) - }, - ) - } - }; -} - -do_diff_test!(test_diff_48_1_len, "48.1.len", tlsh2::TlshBuilder48_1, true); -do_diff_test!( - test_diff_48_1_xlen, - "48.1.xlen", - tlsh2::TlshBuilder48_1, - false -); -do_diff_test!( - test_diff_128_1_len, - "128.1.len", - tlsh2::TlshBuilder128_1, - true -); -do_diff_test!( - test_diff_128_1_xlen, - "128.1.xlen", - tlsh2::TlshBuilder128_1, - false -); -do_diff_test!( - test_diff_128_3_len, - "128.3.len", - tlsh2::TlshBuilder128_3, - true -); -do_diff_test!( - test_diff_128_3_xlen, - "128.3.xlen", - tlsh2::TlshBuilder128_3, - false -); -do_diff_test!( - test_diff_256_1_len, - "256.1.len", - tlsh2::TlshBuilder256_1, - true -); -do_diff_test!( - test_diff_256_1_xlen, - "256.1.xlen", - tlsh2::TlshBuilder256_1, - false -); -do_diff_test!( - test_diff_256_3_len, - "256.3.len", - tlsh2::TlshBuilder256_3, - true -); -do_diff_test!( - test_diff_256_3_xlen, - "256.3.xlen", - tlsh2::TlshBuilder256_3, - false -); +use std::collections::HashMap; +use std::io::BufRead; +use std::path::{Path, PathBuf}; + +fn test_diff(path: &str, compute_diff: F) +where + F: Fn(&Path, &Path) -> i32, +{ + let f = std::fs::File::open(path).unwrap(); + let reader = std::io::BufReader::new(f); + for line in reader.lines() { + let line = line.unwrap(); + let mut line = line.split('\t'); + let path1 = line.next().unwrap(); + let path2 = line.next().unwrap(); + let expected_score = line.next().unwrap().parse::().unwrap(); + + assert_eq!( + compute_diff(Path::new(path1), Path::new(path2)), + expected_score + ); + } +} + +fn build_cache(f: F) -> HashMap +where + F: Fn(&[u8]) -> T, +{ + glob::glob("tests/assets/tlsh/example_data/*") + .unwrap() + .map(|path| { + let path = path.unwrap(); + let contents = std::fs::read(&path).unwrap(); + ( + path.strip_prefix("tests/assets/tlsh") + .unwrap() + .to_path_buf(), + f(&contents), + ) + }) + .collect() +} + +macro_rules! do_diff_test { + ($testname:ident, $name:expr, $type:ty, $len_diff:expr) => { + #[test] + fn $testname() { + let cache = build_cache(|contents| { + let mut tlsh = <$type>::new(); + tlsh.update(contents); + tlsh.build().unwrap() + }); + + test_diff( + &format!( + "tests/assets/tlsh/exp/example_data.{}.xref.scores_EXP", + $name + ), + |path1, path2| { + let tlsh1 = cache.get(path1).unwrap(); + let tlsh2 = cache.get(path2).unwrap(); + tlsh1.diff(&tlsh2, $len_diff) + }, + ) + } + }; +} + +do_diff_test!(test_diff_48_1_len, "48.1.len", tlsh2::TlshBuilder48_1, true); +do_diff_test!( + test_diff_48_1_xlen, + "48.1.xlen", + tlsh2::TlshBuilder48_1, + false +); +do_diff_test!( + test_diff_128_1_len, + "128.1.len", + tlsh2::TlshBuilder128_1, + true +); +do_diff_test!( + test_diff_128_1_xlen, + "128.1.xlen", + tlsh2::TlshBuilder128_1, + false +); +do_diff_test!( + test_diff_128_3_len, + "128.3.len", + tlsh2::TlshBuilder128_3, + true +); +do_diff_test!( + test_diff_128_3_xlen, + "128.3.xlen", + tlsh2::TlshBuilder128_3, + false +); +do_diff_test!( + test_diff_256_1_len, + "256.1.len", + tlsh2::TlshBuilder256_1, + true +); +do_diff_test!( + test_diff_256_1_xlen, + "256.1.xlen", + tlsh2::TlshBuilder256_1, + false +); +do_diff_test!( + test_diff_256_3_len, + "256.3.len", + tlsh2::TlshBuilder256_3, + true +); +do_diff_test!( + test_diff_256_3_xlen, + "256.3.xlen", + tlsh2::TlshBuilder256_3, + false +); diff --git a/tests/it/hash.rs b/tests/it/hash.rs index 1347e89..4d3458e 100644 --- a/tests/it/hash.rs +++ b/tests/it/hash.rs @@ -1,45 +1,45 @@ -use std::io::BufRead; - -fn test_hash(path: &str, compute_hash: F) -where - F: Fn(&[u8]) -> String, -{ - let f = std::fs::File::open(path).unwrap(); - let reader = std::io::BufReader::new(f); - for line in reader.lines() { - let line = line.unwrap(); - let mut line = line.split('\t'); - let expected_hash = line.next().unwrap(); - let filepath = line.next().unwrap(); - - let fullpath = format!("tests/assets/tlsh/{filepath}"); - let contents = std::fs::read(&fullpath) - .unwrap_or_else(|e| panic!("cannot read file {fullpath:?}: {e}")); - - assert_eq!(&compute_hash(&contents), expected_hash); - } -} - -macro_rules! do_hash_test { - ($testname:ident, $name:expr, $type:ty) => { - #[test] - fn $testname() { - test_hash( - &format!("tests/assets/tlsh/exp/example_data.{}.len.out_EXP", $name), - |contents| { - let mut tlsh = <$type>::new(); - tlsh.update(contents); - tlsh.build() - .map(|v| String::from_utf8(v.hash().to_vec()).unwrap()) - .unwrap_or_default() - }, - ) - } - }; -} - -do_hash_test!(test_hash_48_1, "48.1", tlsh2::TlshBuilder48_1); -do_hash_test!(test_hash_128_1, "128.1", tlsh2::TlshBuilder128_1); -do_hash_test!(test_hash_128_3, "128.3", tlsh2::TlshBuilder128_3); -do_hash_test!(test_hash_256_1, "256.1", tlsh2::TlshBuilder256_1); -do_hash_test!(test_hash_256_3, "256.3", tlsh2::TlshBuilder256_3); +use std::io::BufRead; + +fn test_hash(path: &str, compute_hash: F) +where + F: Fn(&[u8]) -> String, +{ + let f = std::fs::File::open(path).unwrap(); + let reader = std::io::BufReader::new(f); + for line in reader.lines() { + let line = line.unwrap(); + let mut line = line.split('\t'); + let expected_hash = line.next().unwrap(); + let filepath = line.next().unwrap(); + + let fullpath = format!("tests/assets/tlsh/{filepath}"); + let contents = std::fs::read(&fullpath) + .unwrap_or_else(|e| panic!("cannot read file {fullpath:?}: {e}")); + + assert_eq!(&compute_hash(&contents), expected_hash); + } +} + +macro_rules! do_hash_test { + ($testname:ident, $name:expr, $type:ty) => { + #[test] + fn $testname() { + test_hash( + &format!("tests/assets/tlsh/exp/example_data.{}.len.out_EXP", $name), + |contents| { + let mut tlsh = <$type>::new(); + tlsh.update(contents); + tlsh.build() + .map(|v| String::from_utf8(v.hash().to_vec()).unwrap()) + .unwrap_or_default() + }, + ) + } + }; +} + +do_hash_test!(test_hash_48_1, "48.1", tlsh2::TlshBuilder48_1); +do_hash_test!(test_hash_128_1, "128.1", tlsh2::TlshBuilder128_1); +do_hash_test!(test_hash_128_3, "128.3", tlsh2::TlshBuilder128_3); +do_hash_test!(test_hash_256_1, "256.1", tlsh2::TlshBuilder256_1); +do_hash_test!(test_hash_256_3, "256.3", tlsh2::TlshBuilder256_3); diff --git a/tests/it/main.rs b/tests/it/main.rs index a815e38..5158180 100644 --- a/tests/it/main.rs +++ b/tests/it/main.rs @@ -1,5 +1,5 @@ -#[cfg(feature = "diff")] -mod diff; -mod hash; -mod misc; -mod tlshc; +#[cfg(feature = "diff")] +mod diff; +mod hash; +mod misc; +mod tlshc;