Zig Requires Chilkat v11.0.0+

RSA Decrypt using PEM

See more RSA Examples

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file. Zig

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

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

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

    const rsa = try chilkat.Rsa.init();
    defer rsa.deinit();

    const key = try chilkat.PrivateKey.init();
    defer key.deinit();

    // Load an RSA private key from an unencrypted PEM file:
    // (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

    key.loadPemFile("qa_data/rsa/decryptTest/priv.pem") catch {
        std.debug.print("{s}\n", .{try key.getLastErrorText(alloc)});
        return;
    };

    // Make the key available to the RSA object
    rsa.usePrivateKey(key) catch {
        std.debug.print("{s}\n", .{try rsa.getLastErrorText(alloc)});
        return;
    };

    const encrypted_str = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA==";

    rsa.setEncodingMode("base64");

    const use_private_key = true;
    const decrypted_str = try rsa.decryptStringENC(alloc, encrypted_str, use_private_key);

    std.debug.print("Decrypted:\n", .{});
    std.debug.print("{s}\n", .{decrypted_str});
}