@whiskeysockets/baileys
Version:
A WebSockets library for interacting with WhatsApp Web
266 lines (265 loc) • 9.19 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodeBinaryNode = exports.decodeDecompressedBinaryNode = exports.decompressingIfRequired = void 0;
const util_1 = require("util");
const zlib_1 = require("zlib");
const constants = __importStar(require("./constants"));
const jid_utils_1 = require("./jid-utils");
const inflatePromise = (0, util_1.promisify)(zlib_1.inflate);
const decompressingIfRequired = async (buffer) => {
if (2 & buffer.readUInt8()) {
buffer = await inflatePromise(buffer.slice(1));
}
else { // nodes with no compression have a 0x00 prefix, we remove that
buffer = buffer.slice(1);
}
return buffer;
};
exports.decompressingIfRequired = decompressingIfRequired;
const decodeDecompressedBinaryNode = (buffer, opts, indexRef = { index: 0 }) => {
const { DOUBLE_BYTE_TOKENS, SINGLE_BYTE_TOKENS, TAGS } = opts;
const checkEOS = (length) => {
if (indexRef.index + length > buffer.length) {
throw new Error('end of stream');
}
};
const next = () => {
const value = buffer[indexRef.index];
indexRef.index += 1;
return value;
};
const readByte = () => {
checkEOS(1);
return next();
};
const readBytes = (n) => {
checkEOS(n);
const value = buffer.slice(indexRef.index, indexRef.index + n);
indexRef.index += n;
return value;
};
const readStringFromChars = (length) => {
return readBytes(length).toString('utf-8');
};
const readInt = (n, littleEndian = false) => {
checkEOS(n);
let val = 0;
for (let i = 0; i < n; i++) {
const shift = littleEndian ? i : n - 1 - i;
val |= next() << (shift * 8);
}
return val;
};
const readInt20 = () => {
checkEOS(3);
return ((next() & 15) << 16) + (next() << 8) + next();
};
const unpackHex = (value) => {
if (value >= 0 && value < 16) {
return value < 10 ? '0'.charCodeAt(0) + value : 'A'.charCodeAt(0) + value - 10;
}
throw new Error('invalid hex: ' + value);
};
const unpackNibble = (value) => {
if (value >= 0 && value <= 9) {
return '0'.charCodeAt(0) + value;
}
switch (value) {
case 10:
return '-'.charCodeAt(0);
case 11:
return '.'.charCodeAt(0);
case 15:
return '\0'.charCodeAt(0);
default:
throw new Error('invalid nibble: ' + value);
}
};
const unpackByte = (tag, value) => {
if (tag === TAGS.NIBBLE_8) {
return unpackNibble(value);
}
else if (tag === TAGS.HEX_8) {
return unpackHex(value);
}
else {
throw new Error('unknown tag: ' + tag);
}
};
const readPacked8 = (tag) => {
const startByte = readByte();
let value = '';
for (let i = 0; i < (startByte & 127); i++) {
const curByte = readByte();
value += String.fromCharCode(unpackByte(tag, (curByte & 0xf0) >> 4));
value += String.fromCharCode(unpackByte(tag, curByte & 0x0f));
}
if (startByte >> 7 !== 0) {
value = value.slice(0, -1);
}
return value;
};
const isListTag = (tag) => {
return tag === TAGS.LIST_EMPTY || tag === TAGS.LIST_8 || tag === TAGS.LIST_16;
};
const readListSize = (tag) => {
switch (tag) {
case TAGS.LIST_EMPTY:
return 0;
case TAGS.LIST_8:
return readByte();
case TAGS.LIST_16:
return readInt(2);
default:
throw new Error('invalid tag for list size: ' + tag);
}
};
const readJidPair = () => {
const i = readString(readByte());
const j = readString(readByte());
if (j) {
return (i || '') + '@' + j;
}
throw new Error('invalid jid pair: ' + i + ', ' + j);
};
const readAdJid = () => {
const rawDomainType = readByte();
const domainType = Number(rawDomainType);
const device = readByte();
const user = readString(readByte());
return (0, jid_utils_1.jidEncode)(user, domainType === 0 || domainType === 128 ? 's.whatsapp.net' : 'lid', device);
};
const readString = (tag) => {
if (tag >= 1 && tag < SINGLE_BYTE_TOKENS.length) {
return SINGLE_BYTE_TOKENS[tag] || '';
}
switch (tag) {
case TAGS.DICTIONARY_0:
case TAGS.DICTIONARY_1:
case TAGS.DICTIONARY_2:
case TAGS.DICTIONARY_3:
return getTokenDouble(tag - TAGS.DICTIONARY_0, readByte());
case TAGS.LIST_EMPTY:
return '';
case TAGS.BINARY_8:
return readStringFromChars(readByte());
case TAGS.BINARY_20:
return readStringFromChars(readInt20());
case TAGS.BINARY_32:
return readStringFromChars(readInt(4));
case TAGS.JID_PAIR:
return readJidPair();
case TAGS.AD_JID:
return readAdJid();
case TAGS.HEX_8:
case TAGS.NIBBLE_8:
return readPacked8(tag);
default:
throw new Error('invalid string with tag: ' + tag);
}
};
const readList = (tag) => {
const items = [];
const size = readListSize(tag);
for (let i = 0; i < size; i++) {
items.push((0, exports.decodeDecompressedBinaryNode)(buffer, opts, indexRef));
}
return items;
};
const getTokenDouble = (index1, index2) => {
const dict = DOUBLE_BYTE_TOKENS[index1];
if (!dict) {
throw new Error(`Invalid double token dict (${index1})`);
}
const value = dict[index2];
if (typeof value === 'undefined') {
throw new Error(`Invalid double token (${index2})`);
}
return value;
};
const listSize = readListSize(readByte());
const header = readString(readByte());
if (!listSize || !header.length) {
throw new Error('invalid node');
}
const attrs = {};
let data;
if (listSize === 0 || !header) {
throw new Error('invalid node');
}
// read the attributes in
const attributesLength = (listSize - 1) >> 1;
for (let i = 0; i < attributesLength; i++) {
const key = readString(readByte());
const value = readString(readByte());
attrs[key] = value;
}
if (listSize % 2 === 0) {
const tag = readByte();
if (isListTag(tag)) {
data = readList(tag);
}
else {
let decoded;
switch (tag) {
case TAGS.BINARY_8:
decoded = readBytes(readByte());
break;
case TAGS.BINARY_20:
decoded = readBytes(readInt20());
break;
case TAGS.BINARY_32:
decoded = readBytes(readInt(4));
break;
default:
decoded = readString(tag);
break;
}
data = decoded;
}
}
return {
tag: header,
attrs,
content: data
};
};
exports.decodeDecompressedBinaryNode = decodeDecompressedBinaryNode;
const decodeBinaryNode = async (buff) => {
const decompBuff = await (0, exports.decompressingIfRequired)(buff);
return (0, exports.decodeDecompressedBinaryNode)(decompBuff, constants);
};
exports.decodeBinaryNode = decodeBinaryNode;