(Swift 2) Generate DSA SSH Key

Generates a DSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY).

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    let key = CkoSshKey()

    var success: Bool

    var numBits: Int

    // numBits should be a minimum of 1024 and
    // a multiple of 64.  Typical values are
    // 1024 or 2048. 
    numBits = 2048
    success = key.GenerateDsaKey(numBits)
    if success != true {
        print("Invalid numBits passed to DSA key generation method.")
        return
    }

    // Note: Generating a public/private key pair is CPU intensive
    // and may take a short amount of time (more than few seconds,
    // but less than a minute).

    var exportedKey: String?
    var exportEncrypted: Bool

    // Export the DSA private key to OpenSSH, PuTTY, and XML and save. 
    exportEncrypted = false
    exportedKey = key.ToOpenSshPrivateKey(exportEncrypted)
    // Chilkat provides a SaveText method for convenience...
    success = key.SaveText(exportedKey, path: "privkey_openssh_unencrypted.pem")

    // Export with encryption to OpenSSH private key format:
    key.Password = "secret"
    exportEncrypted = true
    exportedKey = key.ToOpenSshPrivateKey(exportEncrypted)
    success = key.SaveText(exportedKey, path: "privkey_openssh_encrypted.pem")

    // Export the DSA private key to unencrypted PuTTY format:
    exportEncrypted = false
    exportedKey = key.ToPuttyPrivateKey(exportEncrypted)
    success = key.SaveText(exportedKey, path: "privkey_putty_unencrypted.ppk")

    // Export the DSA private key to encrypted PuTTY format:
    key.Password = "secret"
    exportEncrypted = true
    exportedKey = key.ToPuttyPrivateKey(exportEncrypted)
    success = key.SaveText(exportedKey, path: "privkey_putty_encrypted.ppk")

    // Export private key to XML:
    exportedKey = key.ToXml()
    success = key.SaveText(exportedKey, path: "privkey.xml")

    // ----------------------------------------------------
    // Now for the public key....
    // ----------------------------------------------------

    // The Secure Shell (SSH) Public Key File Format
    // is documented in RFC 4716.
    exportedKey = key.ToRfc4716PublicKey()
    success = key.SaveText(exportedKey, path: "pubkey_rfc4716.pub")

    // OpenSSH has a separate public-key file format, which 
    // is also supported by Chilkat SshKey:
    exportedKey = key.ToOpenSshPublicKey()
    success = key.SaveText(exportedKey, path: "pubkey_openSsh.pub")

    print("Finished.")

}