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Load an Encrypted Private Key from a PEM File

Demonstrates the Chilkat PrivateKey.LoadEncryptedPemFile method, which loads a private key from a file, using a password when the key is encrypted. The first argument is the file path and the second is the password.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own key file.

Background: The file-based encrypted loader — the natural choice for a .pem key stored with a passphrase, as most deployment keys are. It decrypts encrypted PKCS #8 PEM and also accepts unencrypted files, so it works whether or not the specific file is protected. Supply the passphrase from a secure source.

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

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

    // Demonstrates the PrivateKey.LoadEncryptedPemFile method, which loads a private key from a file,
    // using a password when the key is encrypted.  The 1st argument is the file path and the 2nd is
    // the password.

    const priv_key = try chilkat.PrivateKey.init();
    defer priv_key.deinit();

    // The key password is not hard-coded in a real application; obtain it from an interactive
    // prompt, environment variable, or a secrets vault.
    const password = "myKeyPassword";

    priv_key.loadEncryptedPemFile("qa_data/private_encrypted.pem", password) catch {
        std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Loaded a {s} private key.\n", .{try priv_key.getKeyType(alloc)});
}