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fix(po2lmo): исправлена хеш-функция sfh_hash в po2lmo.js

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This commit is contained in:
Dushnilin
2026-08-01 18:43:22 +03:00
parent 1c535dd1b9
commit 7345515902
7 changed files with 262 additions and 35 deletions
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luci-app-tachyon/po/ru/tachyon.ru.lmo
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tools/debug_lmo.js
+93
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@@ -0,0 +1,93 @@
const fs = require('fs');
// LuCI uses this specific SuperFastHash from OpenWrt
// Let me try to match it against the reference lmo
// adblock.bg.lmo entry 1: keyId=0x1545b51f
// We need to know what string produces this hash
// Try the OpenWrt luci sfh_hash
function luci_sfh_hash(data) {
let hash = 0;
const len = data.length;
let i;
for (i = 0; i < len; i++) {
hash += data.charCodeAt(i);
hash = (hash << 10) + hash;
hash ^= hash >>> 6;
}
hash += hash << 3;
hash ^= hash >>> 11;
hash += hash << 15;
return hash >>> 0;
}
console.log('luci_sfh empty:', luci_sfh_hash('').toString(16));
console.log('luci_sfh Plural-Forms:', luci_sfh_hash('Plural-Forms').toString(16));
// Now check my po2lmo sfh_hash
function po2lmo_sfh(data) {
let hash = 0;
let i = data.length;
let k;
while (i >= 4) {
k = (data.charCodeAt(i - 4) & 0xff) |
((data.charCodeAt(i - 3) & 0xff) << 8) |
((data.charCodeAt(i - 2) & 0xff) << 16) |
((data.charCodeAt(i - 1) & 0xff) << 24);
k = Math.imul(k, 0x5bd1e995);
k = k >>> 0;
k ^= k >>> 24;
k = Math.imul(k, 0x5bd1e995);
k = k >>> 0;
hash = Math.imul(hash, 0x5bd1e995) + k;
hash = hash >>> 0;
i -= 4;
}
switch (i) {
case 3: hash ^= (data.charCodeAt(0) & 0xff) << 16;
case 2: hash ^= (data.charCodeAt(i - 2) & 0xff) << 8;
case 1: hash ^= (data.charCodeAt(i - 1) & 0xff);
hash = Math.imul(hash, 0x5bd1e995);
hash = hash >>> 0;
}
hash ^= hash >>> 13;
hash = Math.imul(hash, 0x5bd1e995);
hash = hash >>> 0;
hash ^= hash >>> 15;
return hash >>> 0;
}
console.log('po2lmo_sfh empty:', po2lmo_sfh('').toString(16));
console.log('po2lmo_sfh Plural-Forms:', po2lmo_sfh('Plural-Forms').toString(16));
// Read the reference LMO
const buf = fs.readFileSync('tools/test_ref.lmo');
const indexOffset = buf.readUInt32BE(buf.length - 4);
const entryCount = (buf.length - 4 - indexOffset) / 16;
console.log('\nReference LMO entries:');
for (let i = 0; i < Math.min(10, entryCount); i++) {
const off = indexOffset + i * 16;
const keyId = buf.readUInt32BE(off);
console.log(' keyId:', keyId.toString(16));
}
// Read payload to get actual strings
for (let i = 0; i < Math.min(10, entryCount); i++) {
const off = indexOffset + i * 16;
const keyId = buf.readUInt32BE(off);
const valId = buf.readUInt32BE(off + 4);
const offset = buf.readUInt32BE(off + 8);
const length = buf.readUInt32BE(off + 12);
// Read the payload at offset
const valBuf = buf.slice(offset, offset + length);
const valStr = valBuf.toString('utf8').replace(/\0/g, '');
console.log(` [${i}] keyId:${keyId.toString(16).padStart(8,'0')} off:${offset} len:${length} val:"${valStr}"`);
// If this is entry 1+, try to compute hash of the key
if (i > 0 && valStr.length > 0) {
console.log(` luci_sfh("${valStr}") = ${luci_sfh_hash(valStr).toString(16)}`);
console.log(` po2lmo_sfh("${valStr}") = ${po2lmo_sfh(valStr).toString(16)}`);
}
}
tools/hash_test.js
+26
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@@ -0,0 +1,26 @@
// OpenWrt luci-core uses this hash (from lmo.c):
function lmo_hash(s) {
let h = 0;
for (let i = 0; i < s.length; i++) {
h += s.charCodeAt(i);
h = (h + (h << 10)) >>> 0;
h ^= h >>> 6;
}
h = (h + (h << 3)) >>> 0;
h ^= h >>> 11;
h = (h + (h << 15)) >>> 0;
return h >>> 0;
}
// Reference: entry 1 keyId=0x1545b51f
console.log('lmo_hash(Client):', lmo_hash('Client').toString(16), '(target: 1545b51f)');
console.log('lmo_hash(Download):', lmo_hash('Download').toString(16));
console.log('lmo_hash(Save):', lmo_hash('Save').toString(16));
console.log('lmo_hash(Action):', lmo_hash('Action').toString(16));
console.log('lmo_hash(Enabled):', lmo_hash('Enabled').toString(16));
console.log('lmo_hash(General):', lmo_hash('General').toString(16));
console.log('lmo_hash(Email):', lmo_hash('Email').toString(16));
console.log('lmo_hash(Subject):', lmo_hash('Subject').toString(16));
console.log('lmo_hash(Enable detailed logs):', lmo_hash('Enable detailed logs').toString(16));
console.log('lmo_hash(Enable):', lmo_hash('Enable').toString(16));
console.log('lmo_hash(Close):', lmo_hash('Close').toString(16));
console.log('lmo_hash(Save & Apply):', lmo_hash('Save & Apply').toString(16));
tools/po2lmo.js
+51 -35
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@@ -3,31 +3,58 @@
const fs = require('fs');
// Paul Hsieh's SuperFastHash
function sfh_hash(data) {
let hash = 0;
let i = data.length;
let k;
while (i >= 4) {
k = (data.charCodeAt(i - 4) & 0xff) |
((data.charCodeAt(i - 3) & 0xff) << 8) |
((data.charCodeAt(i - 2) & 0xff) << 16) |
((data.charCodeAt(i - 1) & 0xff) << 24);
k = (k * 0x5bd1e995) >>> 0;
k ^= k >>> 24;
k = (k * 0x5bd1e995) >>> 0;
hash = (hash * 0x5bd1e995 + k) >>> 0;
i -= 4;
// OpenWrt LuCI SuperFastHash (from LMO.md / template_lmo.c)
// sfh_get16 reads uint16 in little-endian
function sfh_get16(d, off) {
return (d[off] & 0xff) + ((d[off + 1] & 0xff) << 8);
}
function sfh_hash(str) {
const data = Buffer.from(str, 'utf8');
const len = data.length;
if (len <= 0) return 0;
let hash = len;
let rem = len & 3;
let offset = 0;
const words = len >> 2;
// Main loop
for (let i = 0; i < words; i++) {
hash += sfh_get16(data, offset);
let tmp = (sfh_get16(data, offset + 2) << 11) ^ hash;
hash = (hash << 16) ^ tmp;
offset += 4;
hash += hash >>> 11;
}
switch (i) {
case 3: hash ^= (data.charCodeAt(i - 3) & 0xff) << 16;
case 2: hash ^= (data.charCodeAt(i - 2) & 0xff) << 8;
case 1: hash ^= (data.charCodeAt(i - 1) & 0xff);
hash = (hash * 0x5bd1e995) >>> 0;
// Handle end cases
switch (rem) {
case 3:
hash += sfh_get16(data, offset);
hash ^= hash << 16;
hash ^= data[offset + 2] << 18;
hash += hash >>> 11;
break;
case 2:
hash += sfh_get16(data, offset);
hash ^= hash << 11;
hash += hash >>> 17;
break;
case 1:
hash += data[offset];
hash ^= hash << 10;
hash += hash >>> 1;
}
hash ^= hash >>> 13;
hash = (hash * 0x5bd1e995) >>> 0;
hash ^= hash >>> 15;
// Force "avalanching" of final 127 bits
hash ^= hash << 3;
hash += hash >>> 5;
hash ^= hash << 4;
hash += hash >>> 17;
hash ^= hash << 25;
hash += hash >>> 6;
return hash >>> 0;
}
@@ -41,7 +68,6 @@ function parsePo(content) {
let state = null;
let msgid = '';
let msgstr = '';
let key = '';
function flush() {
if (state === 'msgstr' && msgid !== '' && msgstr !== '') {
@@ -83,23 +109,15 @@ function compileLmo(entries) {
const keyId = sfh_hash(entry.key);
const valId = sfh_hash(entry.value);
// Write value to payload
const paddedLen = valBuf.length + pad4(valBuf.length);
const padded = Buffer.alloc(paddedLen, 0);
valBuf.copy(padded);
payload.push(padded);
index.push({
keyId,
valId,
offset,
length: valBuf.length,
});
index.push({ keyId, valId, offset, length: valBuf.length });
offset += paddedLen;
}
// Build index section
const indexBuf = Buffer.alloc(index.length * 16);
for (let i = 0; i < index.length; i++) {
indexBuf.writeUInt32BE(index[i].keyId, i * 16);
@@ -108,7 +126,6 @@ function compileLmo(entries) {
indexBuf.writeUInt32BE(index[i].length, i * 16 + 12);
}
// Total: payload + index + 4 bytes for index offset
const payloadData = Buffer.concat(payload);
const totalLen = payloadData.length + indexBuf.length + 4;
const out = Buffer.alloc(totalLen);
@@ -119,7 +136,6 @@ function compileLmo(entries) {
return out;
}
// Main
const [input, output] = process.argv.slice(2);
if (!input || !output) {
console.error('Usage: node po2lmo.js input.po output.lmo');
tools/test_hash.js
+26
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@@ -0,0 +1,26 @@
function sfh_hash(data) {
let hash = 0;
let i = data.length;
let k;
while (i >= 4) {
k = (data.charCodeAt(i - 4) & 0xff) | ((data.charCodeAt(i - 3) & 0xff) << 8) | ((data.charCodeAt(i - 2) & 0xff) << 16) | ((data.charCodeAt(i - 1) & 0xff) << 24);
k = (k * 0x5bd1e995) >>> 0;
k ^= k >>> 24;
k = (k * 0x5bd1e995) >>> 0;
hash = (hash * 0x5bd1e995 + k) >>> 0;
i -= 4;
}
switch (i) {
case 3: hash ^= (data.charCodeAt(i - 3) & 0xff) << 16;
case 2: hash ^= (data.charCodeAt(i - 2) & 0xff) << 8;
case 1: hash ^= (data.charCodeAt(i - 1) & 0xff);
hash = (hash * 0x5bd1e995) >>> 0;
}
hash ^= hash >>> 13;
hash = (hash * 0x5bd1e995) >>> 0;
hash ^= hash >>> 15;
return hash >>> 0;
}
console.log('Empty:', sfh_hash('').toString(16));
console.log('Plural-Forms:', sfh_hash('Plural-Forms').toString(16));
console.log('Test str:', sfh_hash('Hello').toString(16));
tools/test_ref.lmo
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tools/verify_hash.js
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const fs = require('fs');
function sfh_get16(d, off) {
return (d[off] & 0xff) + ((d[off + 1] & 0xff) << 8);
}
function sfh_hash(str) {
const data = Buffer.from(str, 'utf8');
const len = data.length;
if (len <= 0) return 0;
let hash = len;
let rem = len & 3;
let offset = 0;
const words = len >> 2;
for (let i = 0; i < words; i++) {
hash += sfh_get16(data, offset);
let tmp = (sfh_get16(data, offset + 2) << 11) ^ hash;
hash = (hash << 16) ^ tmp;
offset += 4;
hash += hash >>> 11;
}
switch (rem) {
case 3:
hash += sfh_get16(data, offset);
hash ^= hash << 16;
hash ^= data[offset + 2] << 18;
hash += hash >>> 11;
break;
case 2:
hash += sfh_get16(data, offset);
hash ^= hash << 11;
hash += hash >>> 17;
break;
case 1:
hash += data[offset];
hash ^= hash << 10;
hash += hash >>> 1;
}
hash ^= hash << 3;
hash += hash >>> 5;
hash ^= hash << 4;
hash += hash >>> 17;
hash ^= hash << 25;
hash += hash >>> 6;
return hash >>> 0;
}
// Reference: adblock.bg.lmo entry 1 keyId=0x1545b51f
// msgid for "Клиент" in adblock bg is likely "Client"
console.log('sfh_hash(Client):', sfh_hash('Client').toString(16), '(target: 1545b51f)');
console.log('sfh_hash(Save):', sfh_hash('Save').toString(16));
console.log('sfh_hash(Close):', sfh_hash('Close').toString(16));
console.log('sfh_hash(Enable):', sfh_hash('Enable').toString(16));
console.log('sfh_hash(Enabled):', sfh_hash('Enabled').toString(16));
console.log('sfh_hash(General settings):', sfh_hash('General settings').toString(16));
console.log('sfh_hash(Action):', sfh_hash('Action').toString(16));
console.log('sfh_hash(Download):', sfh_hash('Download').toString(16));
console.log('sfh_hash(Email):', sfh_hash('Email').toString(16));
console.log('sfh_hash(Subject):', sfh_hash('Subject').toString(16));
console.log('sfh_hash(Enable detailed logs):', sfh_hash('Enable detailed logs').toString(16));
console.log('sfh_hash(Save & Apply):', sfh_hash('Save & Apply').toString(16));
// Now test with some of our tachyon strings
console.log('\nTachyon strings:');
console.log('sfh_hash(Periodically checks if the proxy is responding. Restarts Tachyon after consecutive failures.):', sfh_hash('Periodically checks if the proxy is responding. Restarts Tachyon after consecutive failures.').toString(16));
console.log('sfh_hash(Enable Proxy Health Monitor):', sfh_hash('Enable Proxy Health Monitor').toString(16));