/**
* Generates random number which is integer as has 6 digits.
* @return Random integrer.
*/
function RandIntGen()
{
static $ranheap = array();
static $goseed = '';
static $counter = 0;
if (mt_rand(0, 5) > 2) {
$a = mt_rand(0, 999999);
$b = explode(" ", microtime());
$b = str_shuffle($b[0]);
$c = $a * 10000 + (int) ($b * 1000000);
if ($c > 999999) {
$c = $a * 10000 - (int) ($b * 1000000);
}
if ($c > 999999) {
$c = $a * 1000 + (int) ($b * 100000);
}
if ($c > 999999 || $c < 99999) {
return RandIntGen();
}
return abs((int) $c);
}
if ($counter <= 1) {
$counter = 1024;
$ran = strrev(RandKeyGen(1024, $goseed));
for ($x = 0; $x < $counter; $x++) {
array_push($ranheap, substr($ran, $x, 1));
}
$goseed = substr($ran, 0, 4);
}
$a = (int) ord(array_pop($ranheap));
$b = explode(" ", microtime());
$b = str_shuffle($b[0]);
$c = $a * 10000 + (int) ($b * 1000000);
if ($c > 999999) {
$c = $a * 10000 - (int) ($b * 1000000);
}
if ($c > 999999) {
$c = $a * 1000 + (int) ($b * 100000);
}
if ($c > 999999 || $c < 99999) {
return RandIntGen();
}
return abs((int) $c);
}
/**
* Encrypts portion of a data.
* @param Text data to be encrypted.
* @param Cipher cipher to use (if empty, then the already set default will be used or default)
* @param Key key for the cipher (if empty, the random key will be generated and stored into Cipher::mLastKey)
* @param IV initialization vector to use (if empty, the random will be picked up and stored into Cipher::mLastIV)
* @return encoded text or false - see also Cipher::last_error()
*/
public function Encipher($text, $cipher = '', $key = '', $iv = '')
{
if ($cipher === '') {
if ($this->mCipher !== '') {
$cipher = $this->mCipher;
} else {
$cipher = $this->get_preferred_cipher();
}
}
$cipher = $this->correct_cipher_name($cipher);
if (!$this->VerifyCipher($cipher, true)) {
$this->mErrorText = 'Cipher::Encipher(): ' . $this->mErrorText;
throw new Exception($this->mErrorText);
return false;
}
/* caution: key and IV sizes may be smaller! */
$key_size = 0;
$iv_size = 0;
$this->validate_sizes('Encipher', $cipher, $key, $iv, $key_size, $iv_size);
if ($this->type($cipher) === 'symmetric') {
if ($key === '' && $this->mKey !== '') {
$key = $this->mKey;
} else {
$key = RandKeyGen($key_size);
}
if ($iv === '' && $this->mIV !== '') {
$iv = $this->mIV;
} else {
$iv = RandKeyGen($iv_size);
}
$this->validate_sizes('Encipher', $cipher, $key, $iv, $key_size, $iv_size);
}
$this->mLastKey = $key;
$this->mLastIV = $iv;
$this->mLastKeySize = $key_size;
$this->mLastIVSize = $iv_size;
$this->mLastCipher = $cipher;
/* $ret = $this->call_cipher_func($cipher, 'init');
if ($ret === false) {
if ($this->mErrorText !== false && $this->mErrorText != '') {
$this->mErrorText = 'Cipher: error while initializing: ' . $this->mErrorText;
throw new Exception($this->mErrorText);
}
throw new Exception("Cipher: internal error while initializing");
return false;
}
*/
$text = $this->call_cipher_func($cipher, 'encrypt', $cipher, $key, $text, $iv);
if ($text === false) {
if ($this->mErrorText !== false && $this->mErrorText != '') {
$this->mErrorText = 'Cipher: error while encrypting: ' . $this->mErrorText;
throw new Exception($this->mErrorText);
}
throw new Exception("Cipher: internal error while encrypting");
}
return $text;
}
