Zig

Check if a MIME Tree Contains Signed Parts

Demonstrates the Chilkat Mime.ContainsSignedParts method, which returns whether the currently visible MIME tree contains a complete detached or opaque CMS/PKCS #7 signed entity. It takes no arguments.

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 file.

Background: Where IsSigned asks whether the top entity is a signature wrapper, this scans the whole tree for a signed part nested anywhere inside — useful when signing is applied to a sub-part rather than the outermost entity. It is the discovery step before deciding whether verification is needed.

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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 Mime.ContainsSignedParts method, which returns whether the MIME tree contains a complete CMS/PKCS #7 signed entity.  It takes no arguments.

    const mime = try chilkat.Mime.init();
    defer mime.deinit();
    mime.loadMimeFile("qa_data/message.eml") catch {
        std.debug.print("{s}\n", .{try mime.getLastErrorText(alloc)});
        return;
    };

    if (mime.containsSignedParts()) {
        std.debug.print("The message tree contains a signed part.\n", .{});
    } else {
        std.debug.print("The message tree contains no signed part.\n", .{});
    }
}