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Convert DSA DER Private Key to PEM

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Converts a DSA private key from DER format to PEM. Demonstrates how to write both encrypted and unencrypted PEM formatted private keys. Zig

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

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

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

    const dsa = try chilkat.Dsa.init();
    defer dsa.deinit();

    // Load a DER private key.
    dsa.fromDerFile("dsa_priv.der") catch {
        std.debug.print("{s}\n", .{try dsa.getLastErrorText(alloc)});
        return;
    };

    var pem_str: [:0]const u8 = "";

    // Save to unencrypted PEM:
    pem_str = try dsa.toPem(alloc);
    dsa.saveText(pem_str, "dsa_priv.pem") catch {
        std.debug.print("{s}\n", .{try dsa.getLastErrorText(alloc)});
        return;
    };

    // Save to encrypted PEM:
    pem_str = try dsa.toEncryptedPem(alloc, "myPassword");
    dsa.saveText(pem_str, "dsa_privEncrypted.pem") catch {
        std.debug.print("{s}\n", .{try dsa.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Finished!\n", .{});
}