Zig

Add a PFX Source to MailMan for Decryption

Demonstrates the Chilkat MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the MailMan object's internal list of sources used for locating certificates and private keys — for example, to decrypt S/MIME email downloaded from the server. The second argument is the PFX password. This example configures a POP3 connection and registers a PFX source.

Background: When MailMan downloads an encrypted (S/MIME) message, it needs the recipient's private key to decrypt it. On Windows and macOS the OS certificate stores are searched automatically, but when the key lives in a standalone PFX file — common on Linux or in server deployments — AddPfxSourceFile tells MailMan where to find it. A PFX bundles the certificate and its private key in one password-protected file.

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Zig

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

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

    // Demonstrates the MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the
    // MailMan object's internal list of sources used for locating certificates and private
    // keys (for example, to decrypt downloaded S/MIME email).  The 2nd argument is the PFX
    // password.

    const mailman = try chilkat.MailMan.init();
    defer mailman.deinit();

    // Configure the POP3 server connection.
    mailman.setMailHost("pop.example.com");
    mailman.setMailPort(995);
    mailman.setPopSsl(true);
    mailman.setPopUsername("user@example.com");
    mailman.setPopPassword("myPassword");

    // Provide a PFX so that encrypted emails downloaded from the server can be decrypted.

    mailman.addPfxSourceFile("qa_data/certs/decryption.pfx", "pfx_password") catch {
        std.debug.print("{s}\n", .{try mailman.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Added the PFX certificate/private-key source.\n", .{});

    // Note: The path "qa_data/certs/decryption.pfx" is a relative local filesystem path,
    // relative to the current working directory of the running application.
}