Cannot get encryption class to work
I cannot get an encryption class to work (it's in a seperate file in the classes folder). The code for the class is:
class SymmetricCrypt
{
// Encryption/decryption key.
private static $msSecretKey = "Hello";
// The initialisation vector.
private static $msHexaIv = "c7098adc8d6128b5d4b4f7b2fe7f7f05";
// Use the Rijndael Algorithm.
private static $msCipherAlgorithm = MCRYPT_RIJNDAEL_128;
public static function Encrypt($plainString)
{
$binary_iv = pack("H*", SymmetricCrypt::$msHexaIv);
// Encrypt source.
$binary_encrypted_string = mcrypt_encrypt(SymmetricCrypt::$msCipherAlgorithm, SymmetricCrypt::$msSecretKey, $plainString, MCRYPT_MODE_CBC, $binary_iv);
// Convert $binary_encrypted_string to hexadeciaml format.
$hexa_encrypted_string = bin2hex($binary_encrypted_string);
return $hexa_encrypted_string;
}
public static function Decrypt($e开发者_如何学GoncryptedString)
{
$binary_iv = pack("H*", SymmetricCrypt::$msHexaIv);
// Convert string in hexadecimal to byte array.
$binary_encrypted_string = pack("H*", $encryptedString);
// Decrypt $binary_encrypted_string,
$decrypted_string = mcrypt_decrypt(SymmetricCrypt::$msCipherAlgorithm, SymmetricCrypt::$msSecretKey, $binary_encrypted_string, MCRYPT_MODE_CBC, $binary_iv);
return $decrypted_string;
}
}
This is how I am calling the class:
require_once 'classes/symmetric_crypt.php';
$sc = new SymmetricCrypt();
$password = "password";
$ec_password = $sc->Encrypt($password);
... insert into database.
If I echo the contents of $password, then it displays "password". If I echo $ec_password, it returns nothing.
I've used it before on a different project on a different server. Could it be something server-related? Any other ideas?
Thanks,
Adrian
Works here.
Two notes:
- Your initialization vectors should not be reused. Otherwise, it gets easier to find the encryption key (see WEP).
- Like premiso saids, you should not stored store passwords as decryptable strings. Use salted hashes with strong hash functions (not MD5!).
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