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45 lines
1.5 KiB
45 lines
1.5 KiB
import { IAuthChallenge } from '../../types/AuthChallenge';
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export class PAPChallenge implements IAuthChallenge {
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// i couldn't find any documentation about it, therefore best guess how this is processed...
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// http://www.networksorcery.com/enp/rfc/rfc1334.txt ?
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decode(data: Buffer) {
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const usrNameLength = data.slice(7, 8).readUInt8(0);
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const user = data.slice(8, usrNameLength);
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console.log('user', user, user.toString().trim());
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let pwdStart = usrNameLength; // data.slice(usrNameLength);
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const passwordDelimeter = Buffer.from([0x02, 0x40, 0x00, 0x00]);
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let found = false;
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let pwd: Buffer;
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do {
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const possibleDelimieter = data.slice(pwdStart, pwdStart + passwordDelimeter.length);
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if (possibleDelimieter.equals(passwordDelimeter)) {
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found = true;
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}
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if (!found) {
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pwdStart++;
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}
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} while (!found && pwdStart < data.length);
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if (!found) {
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throw new Error("couldn't extract password");
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}
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// console.log('pwdStart+passwordDelimeter.length', pwdStart+passwordDelimeter.length);
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// console.log('length', pwdStart + data.readUInt8(pwdStart+passwordDelimeter.length));
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// first byte is a length property.. we ignore for now
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pwd = data.slice(pwdStart + passwordDelimeter.length + 1); // , pwdStart+ data.readUInt8(pwdStart+passwordDelimeter.length));
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// trim pwd
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pwd = pwd.slice(0, pwd.indexOf(0x00));
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console.log('pwd', pwd, pwd.toString().trim().length, pwd.toString());
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return {
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username: user.toString(),
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password: pwd.toString()
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};
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}
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}
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