Zig Requires Chilkat v11.0.0+

RSA Signature SHA256withRSA, iso-8859-1, base64

See more RSA Examples

RSA sign the iso-8859-1 byte representation of a string with SHA256withRSA, and return the signature in the base64 encoding. 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.

    // This example will duplicate the following Java code:
    //
    // Signature sign = Signature.getInstance("SHA256withRSA");
    // sign.initSign(privateKey);
    // sign.update(original.getBytes(Charset.forName("ISO-8859-1")));
    //
    // ...
    // byte[] resultado = sign.sign();
    // sello = encodeByteArrayToBase64(resultado);
    //

    // Load an RSA private key for signing.
    // You can load any format file.  This example loads a .pem, but you can provide path to any type of file holding a private key.
    const priv_key = try chilkat.PrivateKey.init();
    defer priv_key.deinit();
    priv_key.loadAnyFormatFile("qa_data/pem/rsa_passwd.pem", "passwd") catch {
        std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
        return;
    };

    const rsa = try chilkat.Rsa.init();
    defer rsa.deinit();
    rsa.usePrivateKey(priv_key) catch {};

    const original_data = "This is the string to be hashed an RSA signed.";

    // Indicate that we want the iso-8859-1 byte representation of the string to be signed
    rsa.setCharset("iso-8859-1");

    // We want the RSA signature in base64 format
    rsa.setEncodingMode("base64");

    const sig_base64 = try rsa.signStringENC(alloc, original_data, "sha256");
    std.debug.print("{s}\n", .{sig_base64});
}