AES Encryption

AES encryption. The Chilkat encryption component supports 128-bit, 192-bit, and 256-bit AES encryption in both ECB (Electronic Cookbook) and CBC (Cipher-Block Chaining) modes.

 Chilkat Perl Module Downloads for Windows, Linux, and MAC OS X

use chilkat();

$crypt = new chilkat::CkCrypt2();

$success = $crypt->UnlockComponent("Anything for 30-day trial");
if ($success != 1) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

#  AES is also known as Rijndael.
$crypt->put_CryptAlgorithm("aes");

#  CipherMode may be "ecb" or "cbc"
$crypt->put_CipherMode("cbc");

#  KeyLength may be 128, 192, 256
$crypt->put_KeyLength(256);

#  The padding scheme determines the contents of the bytes
#  that are added to pad the result to a multiple of the
#  encryption algorithm's block size.  AES has a block
#  size of 16 bytes, so encrypted output is always
#  a multiple of 16.
$crypt->put_PaddingScheme(0);

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

#  An initialization vector is required if using CBC mode.
#  ECB mode does not use an IV.
#  The length of the IV is equal to the algorithm's block size.
#  It is NOT equal to the length of the key.
$ivHex = "000102030405060708090A0B0C0D0E0F";
$crypt->SetEncodedIV($ivHex,"hex");

#  The secret key must equal the size of the key.  For
#  256-bit encryption, the binary secret key is 32 bytes.
#  For 128-bit encryption, the binary secret key is 16 bytes.
$keyHex = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F";
$crypt->SetEncodedKey($keyHex,"hex");

#  Encrypt a string...
#  The input string is 44 ANSI characters (i.e. 44 bytes), so
#  the output should be 48 bytes (a multiple of 16).
#  Because the output is a hex string, it should
#  be 96 characters long (2 chars per byte).
$encStr = $crypt->encryptStringENC("The quick brown fox jumps over the lazy dog.");
print $encStr . "\n";

#  Now decrypt:
$decStr = $crypt->decryptStringENC($encStr);
print $decStr . "\n";