Zig

SFTP Public-Key Authentication (id_ed25519)

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Demonstrates how to authenticate with an SSH/SFTP server using publickey authentication with an Ed25519 private key (id_ed25519). Zig

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

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

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

    const key = try chilkat.SshKey.init();
    defer key.deinit();

    // The id_ed25519 file should contain something like this:
    // (You can open it in a text editor..)

    // -----BEGIN OPENSSH PRIVATE KEY-----
    // b3BlbnNzaC1rZXktdjEAAAAACmFlczI1Ni1jdHIAAAAGYmNyeXB0AAAAGAAAABDIeK9+Xw
    // 6Do9gnhtrJu5iJAAAAZAAAAAEAAAAzAAAAC3NzaC1lZDI1NTE5AAAAIMh/Ge7fjQCssmVd
    // BqjYZbRAI0pY8IrnB6J1yLetq34OAAAAoMVP7cvy4hTiAINA3I4v55OonkpKza8mzfUW18
    // RDQeYL3ovCVaAYOGcCpf/SW3QiY6tnXq+5WDEfJ7Z/kQ0nl2+1wSLOytxpyO+IY0rRtLrX
    // 6e/agR4nbZpt/MFG6xqcNASbtDgg+9IWGvDrtXOLFofx07/zml+UjFL0tXRpCjOxeqKyXH
    // t8SRgdT97d9/bYPwapaXY+b2DVVy5/LVx4Sq8=
    // -----END OPENSSH PRIVATE KEY-----

    const priv_key_text = key.loadText(alloc, "c:/temp/id_ed25519") catch {
        std.debug.print("{s}\n", .{try key.getLastErrorText(alloc)});
        return;
    };

    // If your private key was saved encrypted, then you'll need the password.
    // In this example, the password "blahblah" is valid for the above key -- which is a real Ed25519 key generated/saved from puttygen.
    key.setPassword("blahblah");

    key.fromOpenSshPrivateKey(priv_key_text) catch {
        std.debug.print("{s}\n", .{try key.getLastErrorText(alloc)});
        return;
    };

    const sftp = try chilkat.SFtp.init();
    defer sftp.deinit();

    // Set some timeouts, in milliseconds:
    sftp.setConnectTimeoutMs(5000);
    sftp.setIdleTimeoutMs(15000);

    const hostname = "sftp.example.com";
    const port = 22;
    sftp.connect(hostname, port) catch {
        std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
        return;
    };

    // Authenticate with the SSH server.  Chilkat SFTP supports
    // both password-based authenication as well as public-key
    // authentication.
    sftp.authenticatePk("myLogin", key) catch {
        std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
    std.debug.print("Public-Key Authentication Successful!\n", .{});

    // Now go do whatever you're app needs to do...
}