云转码密钥算法

php算法示范：

<?php
$time=time().'000';
$ip=get_real_ip();
$sign=bin2hex(aes128Encrypt('91flv',"timestamp=".$time."&ip=".$ip));
function aes128Encrypt($key, $data) {
    $padding = 16 - (strlen($data) % 16);
    $data .= str_repeat(chr($padding), $padding);
    $keySize   = 16;
    $ivSize    = 16;
    $rawKey = $key;
    $genKeyData = '';
    do
    {
        $genKeyData = $genKeyData.md5( $genKeyData.$rawKey, true );
    } while( strlen( $genKeyData ) < ($keySize + $ivSize) );
    $generatedKey = substr( $genKeyData, 0, $keySize );
    $generatedIV  = substr( $genKeyData, $keySize, $ivSize );
    return mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $generatedKey, $data, MCRYPT_MODE_CBC, $generatedIV);
}
function get_real_ip(){
	$ip=false;
	if(!empty($_SERVER["HTTP_CLIENT_IP"])){
		$ip = $_SERVER["HTTP_CLIENT_IP"];
	}
	if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
		$ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
		if ($ip) { array_unshift($ips, $ip); $ip = FALSE; }
		for ($i = 0; $i < count($ips); $i++) {
			if (!eregi ("^(10|172\.16|192\.168)\.", $ips[$i])) {
				$ip = $ips[$i];
				break;
			}
		}
	}
	return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);
}
?>

把以上算法放在动态页面，然后在播放下面的index.m3u8地址这里加上

?sign=<?php echo $sgin; ?>