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4c34106 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | /*
* This file is part of WPPConnect.
*
* WPPConnect is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WPPConnect is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with WPPConnect. If not, see <https://www.gnu.org/licenses/>.
*/
import * as crypto from 'crypto';
import hkdf from 'futoin-hkdf';
import atob from 'atob';
import { ResponseType } from 'axios';
import { Transform } from 'stream';
export const makeOptions = (
useragentOverride: string,
responseType: ResponseType = 'arraybuffer'
) => ({
responseType: responseType,
headers: {
'User-Agent': processUA(useragentOverride),
DNT: '1',
'Upgrade-Insecure-Requests': '1',
origin: 'https://web.whatsapp.com/',
referer: 'https://web.whatsapp.com/',
},
});
export const timeout = (ms: number) =>
new Promise((res) => setTimeout(res, ms));
export const mediaTypes = {
IMAGE: 'Image',
VIDEO: 'Video',
AUDIO: 'Audio',
PTT: 'Audio',
DOCUMENT: 'Document',
STICKER: 'Image',
};
const processUA = (userAgent: string) => {
let ua =
userAgent ||
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36';
if (!ua.includes('WhatsApp')) ua = 'WhatsApp/2.16.352 ' + ua;
return ua;
};
export const magix = (
fileData: any,
mediaKeyBase64: any,
mediaType: any,
expectedSize?: number
) => {
const encodedHex = fileData.toString('hex');
const encodedBytes = hexToBytes(encodedHex);
const mediaKeyBytes: any = base64ToBytes(mediaKeyBase64);
const info = `WhatsApp ${mediaTypes[mediaType.toUpperCase()]} Keys`;
const hash: string = 'sha256';
const salt: any = new Uint8Array(32);
const expandedSize = 112;
const mediaKeyExpanded = hkdf(mediaKeyBytes, expandedSize, {
salt,
info,
hash,
});
const iv = mediaKeyExpanded.slice(0, 16);
const cipherKey = mediaKeyExpanded.slice(16, 48);
const decipher = crypto.createDecipheriv('aes-256-cbc', cipherKey, iv);
const decoded: Buffer = decipher.update(encodedBytes);
const mediaDataBuffer = expectedSize
? fixPadding(decoded, expectedSize)
: decoded;
return mediaDataBuffer;
};
const fixPadding = (data: Buffer, expectedSize: number) => {
let padding = (16 - (expectedSize % 16)) & 0xf;
if (padding > 0) {
if (expectedSize + padding == data.length) {
// console.log(`trimmed: ${padding} bytes`);
data = data.slice(0, data.length - padding);
} else if (data.length + padding == expectedSize) {
// console.log(`adding: ${padding} bytes`);
let arr = new Uint16Array(padding).map((b) => padding);
data = Buffer.concat([data, Buffer.from(arr as any)]);
}
}
//@ts-ignore
return Buffer.from(data, 'utf-8');
};
const hexToBytes = (hexStr: any) => {
const intArray = [];
for (let i = 0; i < hexStr.length; i += 2) {
intArray.push(parseInt(hexStr.substr(i, 2), 16));
}
return new Uint8Array(intArray);
};
const base64ToBytes = (base64Str: any) => {
const binaryStr = atob(base64Str);
const byteArray = new Uint8Array(binaryStr.length);
for (let i = 0; i < binaryStr.length; i++) {
byteArray[i] = binaryStr.charCodeAt(i);
}
return byteArray;
};
export const newMagix = (
mediaKeyBase64: string,
mediaType: string,
expectedSize: number
) => {
const mediaKeyBytes = newBase64ToBytes(mediaKeyBase64);
const info = `WhatsApp ${mediaTypes[mediaType.toUpperCase()]} Keys`;
const hash = 'sha256';
const salt = Buffer.alloc(32);
const expandedSize = 112;
const mediaKeyExpanded = hkdf(mediaKeyBytes, expandedSize, {
salt,
info,
hash,
});
const iv = mediaKeyExpanded.slice(0, 16);
const cipherKey = mediaKeyExpanded.slice(16, 48);
const decipher = crypto.createDecipheriv('aes-256-cbc', cipherKey, iv);
let processedBytes: number = 0;
let buffer = Buffer.alloc(0);
const transformStream = new Transform({
transform(chunk, encoding, callback) {
try {
const decryptedChunk = decipher.update(chunk);
processedBytes += decryptedChunk.length;
if (processedBytes > expectedSize) {
const paddedChunk = Buffer.from(decryptedChunk).slice(
0,
buffer.length - (processedBytes - expectedSize)
);
callback(null, paddedChunk);
} else {
callback(null, decryptedChunk);
}
} catch (error: any) {
callback(error);
}
},
});
transformStream.on('error', (error) => {
console.error('Error during decryption:', error);
});
return transformStream;
};
const newBase64ToBytes = (base64Str: string) =>
Buffer.from(base64Str, 'base64');
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