Zig

Blowfish Encryption to Match PHP's Mcrypt Extension

See more Encryption Examples

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

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 crypt = try chilkat.Crypt2.init();
    defer crypt.deinit();

    // Use "blowfish2" to get proper results:
    crypt.setCryptAlgorithm("blowfish2");

    // CipherMode may be "ecb" or "cbc"
    crypt.setCipherMode("cbc");

    // KeyLength (in bits) may be a number between 32 and 448.
    // 128-bits is usually sufficient.  The KeyLength must be a
    // multiple of 8.
    crypt.setKeyLength(256);

    // Pad with NULL bytes (PHP pads with NULL bytes)
    crypt.setPaddingScheme(3);

    // EncodingMode specifies the encoding of the output for
    // encryption, and the input for decryption.
    // It may be "hex", "url", "base64", or "quoted-printable".
    crypt.setEncodingMode("hex");

    // The blowfish algorithm uses a 64-bit block size,
    // therefore the IV must be 8 bytes:
    const iv_ascii = "12345678";
    crypt.setEncodedIV(iv_ascii, "ascii");

    // For 256-bit encryption, the key is 32 bytes:
    var key_ascii: [:0]const u8 = "1234567890123456ABCDEFGHIJKLMNOP";
    crypt.setEncodedKey(key_ascii, "ascii");

    const plain_text = "The quick brown fox jumped over the lazy dog";

    var cipher_text: [:0]const u8 = try crypt.encryptStringENC(alloc, plain_text);
    std.debug.print("{s}\n", .{cipher_text});
    // Output should be (case insensitive):
    // 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

    // Do 128-bit Blowfish encryption:
    crypt.setKeyLength(128);
    key_ascii = "1234567890123456";
    crypt.setEncodedKey(key_ascii, "ascii");

    cipher_text = try crypt.encryptStringENC(alloc, plain_text);
    std.debug.print("{s}\n", .{cipher_text});
    // Output should be (case insensitive):
    // d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca0
}