ssh2 node js sftp protocol Error Handshake failed

Question

Hello i have a little problem, i developped a script sftp client with node js that connect to an sftp server and grab some files, i tested it with my local server its working, but when i tried to use it with production server i received this error :

Error: Handshake failed: no matching key exchange algorithm

i already generated the rsa key using ssh-keygen

here is the relevant part of the script :

var Client = require('ssh2').Client;
var fs = require('fs');
var path = require('path');

var args = process.argv.slice(2);

var connSettings = {
    host: args[0] || '127.0.0.1',
    port: args[1] || 22,
    username: args[2] || 'karim',
    password: args[3] || 'karimos',
    algorithms: {
        hmac: ['hmac-sha2-256', 'hmac-sha2-512', 'hmac-sha1', 'hmac-sha1-96']
    }

};

Answer 1

I also had the same problem and solved it by adding the following:

algorithms: {
        kex: [
          "diffie-hellman-group1-sha1",
          "ecdh-sha2-nistp256",
          "ecdh-sha2-nistp384",
          "ecdh-sha2-nistp521",
          "diffie-hellman-group-exchange-sha256",
          "diffie-hellman-group14-sha1"
        ],
        cipher: [
          "3des-cbc",
          "aes128-ctr",
          "aes192-ctr",
          "aes256-ctr",
          "aes128-gcm",
          "[email protected]",
          "aes256-gcm",
          "[email protected]"
        ],
        serverHostKey: [
          "ssh-rsa",
          "ecdsa-sha2-nistp256",
          "ecdsa-sha2-nistp384",
          "ecdsa-sha2-nistp521"
        ],
        hmac: [
          "hmac-sha2-256",
          "hmac-sha2-512",
          "hmac-sha1"
        ]
    }