(Swift 3,4,5...) SFTP Host Key Fingerprint

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Demonstrates how to get the SSH server's host key fingerprint after connecting.

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

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

    let sftp = CkoSFtp()!

    var hostname: String? = "sftp.example.com"
    var port: Int = 22
    var success: Bool = sftp.connect(hostname, port: port)
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    // Get the classic MD5 fingeprint
    var md5_fingerprint: String? = sftp.hostKeyFingerprint
    print("\(md5_fingerprint!)")

    // Sample output:
    // ssh-rsa 3072 21:b0:d8:41:4e:ef:78:10:20:af:01:b7:71:5d:eb:94

    // Starting in Chilkat v9.5.0.92, we can also get the SHA256 fingerprint.
    // (it is also possible to get fingerprints using other hash algorithms such as SHA384, SHA512, etc.)

    var includeKeyType: Bool = true
    var includeHashName: Bool = true
    var sha256_fingerprint: String? = sftp.getHostKeyFP("SHA256", includeKeyType: includeKeyType, includeHashName: includeHashName)
    print("\(sha256_fingerprint!)")

    // Sample output:
    // ssh-rsa SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    // The key type and hash name can be optionally included or not.
    includeKeyType = false
    includeHashName = true
    sha256_fingerprint = sftp.getHostKeyFP("SHA256", includeKeyType: includeKeyType, includeHashName: includeHashName)
    print("\(sha256_fingerprint!)")

    // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = true
    includeHashName = false
    sha256_fingerprint = sftp.getHostKeyFP("SHA256", includeKeyType: includeKeyType, includeHashName: includeHashName)
    print("\(sha256_fingerprint!)")

    // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = false
    includeHashName = false
    sha256_fingerprint = sftp.getHostKeyFP("SHA256", includeKeyType: includeKeyType, includeHashName: includeHashName)
    print("\(sha256_fingerprint!)")

    // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

}