Zig

Continue SSH Keyboard-Interactive Authentication

Demonstrates the Chilkat Ssh.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request containing multiple prompts, an XML response is supplied instead. It returns XML indicating the next prompt or the final result.

Background: This is the second half of the keyboard-interactive exchange started by StartKeyboardAuth. A server may issue several rounds of prompts, so a robust client loops: submit answers, read the returned XML, and continue until authentication succeeds or fails. Prompt responses are typically secrets, so obtain them from interactive input rather than embedding them in code.

Chilkat Zig Downloads

Download Chilkat for Zig

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Demonstrates the Ssh.ContinueKeyboardAuth method, which submits a response to a
    // keyboard-interactive prompt.  The only argument is the response.  For multiple prompts, an
    // XML response is supplied instead.

    const ssh = try chilkat.Ssh.init();
    defer ssh.deinit();

    // Connect to the SSH server.  Port 22 is the usual SSH port.
    const ssh_port = 22;
    ssh.connect("ssh.example.com", ssh_port) catch {
        std.debug.print("{s}\n", .{try ssh.getLastErrorText(alloc)});
        return;
    };

    // Begin keyboard-interactive authentication to receive the server's prompt(s).
    _ = ssh.startKeyboardAuth(alloc, "mySshLogin") catch {
        std.debug.print("{s}\n", .{try ssh.getLastErrorText(alloc)});
        return;
    };

    // Normally you would not hard-code the response (typically the password) in source.  You
    // should instead obtain it from an interactive prompt.
    const response = "mySshPassword";

    // Submit the response.  The returned XML indicates the next prompt or the final result.
    const result = ssh.continueKeyboardAuth(alloc, response) catch {
        std.debug.print("{s}\n", .{try ssh.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("{s}\n", .{result});

    ssh.disconnect();
}