function aes_encrypt in AES encryption 5

Same name and namespace in other branches

1. 6 aes.module \aes_encrypt()
2. 7 aes.module \aes_encrypt()

Encrypts a string.

Parameters

string $string The string to encrypt.:

bool $base64encode Whether to return the string base64 encoded (recommended for database insertion).:

string $custom_key Use this as the key rather than the stored one for this operation.:

string $custom_cipher Use this cipher rather than the default one.:

string $custom_iv Use this initialization vector instead of the default one.:

Return value

string The encrypted string.

2 calls to aes_encrypt()

aes_config_submit in ./aes.module

aes_user in ./aes.module

File

./aes.module, line 458

Code

function aes_encrypt($string, $base64encode = true, $custom_key = null, $custom_cipher = null, $custom_iv = null) {
  if ($custom_cipher != null) {
    $cipher = $custom_cipher;
  }
  else {
    $cipher = variable_get("aes_cipher", "rijndael-128");
  }
  $td = mcrypt_module_open($cipher, "", MCRYPT_MODE_CBC, "");
  if ($custom_iv == null) {
    $iv = base64_decode(variable_get("aes_encryption_iv", ""));
  }
  else {
    $iv = base64_decode($custom_iv);
  }
  if (empty($iv)) {
    aes_make_iv();
    $iv = base64_decode(variable_get("aes_encryption_iv", ""));
    watchdog("aes", "No initialization vector found while trying to encrypt! This could be a bit of a pain since you might have to reset all the passwords for all users. I've created a new one now and will try to carry on as normal.", array(), WATCHDOG_WARNING);
  }
  $ks = mcrypt_enc_get_key_size($td);
  if (!empty($custom_key)) {
    $key = $custom_key;
  }
  else {
    $key = aes_get_key();
  }
  $key = substr(sha1($key), 0, $ks);
  mcrypt_generic_init($td, $key, $iv);
  $encrypted = mcrypt_generic($td, $string);
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
  if ($base64encode) {
    return base64_encode($encrypted);
  }
  else {
    return $encrypted;
  }
}