Zig

Generate new DSA Key from OpenSSL Parameters File

See more DSA Examples

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

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();

    dsa.genKeyFromParamsDerFile("dsaparam.der") catch {
        std.debug.print("{s}\n", .{try dsa.getLastErrorText(alloc)});
        return;
    };

    // To generate a key from PEM, call GenKeyFromParamsPem
    // (for an in-memory PEM string) or GenKeyFromParamsFilePem
    // for a PEM file.

    // The public and private keys may now be exported to PEM, DER,
    // and XML formatted files.

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

    // First for the public key...
    // The public key never needs to be encrypted.

    // Save the public key in PEM format:
    pem_str = try dsa.toPublicPem(alloc);
    // This example will not check the return value of SaveText...
    try dsa.saveText(pem_str, "dsa_pub.pem");

    // Save the public key in DER format:
    try dsa.toPublicDerFile("dsa_pub.der");

    var b_public_only: bool = true;
    // Save to XML
    xml_str = try dsa.toXml(alloc, b_public_only);
    try dsa.saveText(pem_str, "dsa_pub.xml");

    // ------------------------------------
    // Now for the private key....
    // ------------------------------------

    // Unencrypted PEM:
    pem_str = try dsa.toPem(alloc);
    try dsa.saveText(pem_str, "dsa_priv.pem");

    // Encrypted PEM:
    pem_str = try dsa.toEncryptedPem(alloc, "myPassword");
    try dsa.saveText(pem_str, "dsa_privEncrypted.pem");

    // DER:
    try dsa.toDerFile("dsa_priv.der");

    // XML:
    b_public_only = false;
    xml_str = try dsa.toXml(alloc, b_public_only);
    try dsa.saveText(pem_str, "dsa_priv.xml");

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