Zig

Load an SSH Key from a File (Many Formats Supported)

Demonstrates how to load an SSH public or private key object from a file. The file can be in any of the following formats:

• OpenSSH private key
• OpenSSH public key
• PuTTY private key
• RFC 4716 public key

Zig

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

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

    var success: bool = false;

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

    // First, use the LoadText convenience method to load a text file (of any SSH key format)
    // into a string:
    const str_key = try sshkey.loadText(alloc, "../mySshKeys/myKey.txt");

    // Next, load the key into the SSH key object.

    // If the key is an OpenSSH private key:
    // (In actuality, the From* methods will automatically detect the format and load
    // the key correctly.  For example, if a PuTTY private key is passed to FromOpenSshPrivateKey,
    // it  will still load correctly.)
    success = if (sshkey.fromOpenSshPrivateKey(str_key)) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try sshkey.getLastErrorText(alloc)});
    } else {
        std.debug.print("Loaded OpenSSH private key.\n", .{});
        return;
    }

    // If the key is an OpenSSH public key:
    success = if (sshkey.fromOpenSshPublicKey(str_key)) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try sshkey.getLastErrorText(alloc)});
    } else {
        std.debug.print("Loaded OpenSSH public key.\n", .{});
        return;
    }

    // If the key is a PuTTY private key:
    success = if (sshkey.fromPuttyPrivateKey(str_key)) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try sshkey.getLastErrorText(alloc)});
    } else {
        std.debug.print("Loaded PuTTY private key.\n", .{});
        return;
    }

    // If the key is an RFC 4716 public key:
    success = if (sshkey.fromRfc4716PublicKey(str_key)) true else |_| false;
    if (!success) {
        std.debug.print("{s}\n", .{try sshkey.getLastErrorText(alloc)});
    } else {
        std.debug.print("Loaded RFC 4716 public key.\n", .{});
    }
}