(Swift) SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

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func chilkatTest() {
    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    var success: Bool

    //  Imagine we've previously saved our encrypted login and password within a JSON config file
    //  that contains this:

    //  {
    //    "ssh_login": "2+qylFfC56Ck7OQQt/U2/w==",
    //    "ssh_password": "5neIq9Jmn0E3p71N6Yc8TA=="
    //  }

    let json = CkoJsonObject()
    json.LoadFile("qa_data/passwords/ssh.json")

    let crypt = CkoCrypt2()

    //  These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
    crypt.CryptAlgorithm = "aes"
    crypt.CipherMode = "cbc"
    crypt.KeyLength = 128
    crypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F", encoding: "hex")
    crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F", encoding: "hex")
    crypt.EncodingMode = "base64"

    let ssLogin = CkoSecureString()
    let ssPassword = CkoSecureString()

    //  Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
    //  a randomly generated session key.)
    crypt.DecryptSecureENC(json.StringOf("ssh_login"), secureStr: ssLogin)
    crypt.DecryptSecureENC(json.StringOf("ssh_password"), secureStr: ssPassword)

    let sftp = CkoSFtp()

    success = sftp.Connect("MY-SSH-SERVER-DOMAIN-OR-IP", port: 22)
    if success != true {
        print("\(sftp.LastErrorText)")
        return
    }

    //  Authenticate using secure strings
    success = sftp.AuthenticateSecPw(ssLogin, password: ssPassword)
    if success != true {
        print("\(sftp.LastErrorText)")
        return
    }

    print("SFTP Authentication successful.")

    sftp.Disconnect()

}