PHP-SHA1PRNG

You can use this php code to generate the 128bit AES KEY from the password

$key = substr(openssl_digest(openssl_digest($password, 'sha1', true), 'sha1', true), 0, 16);

like this java code.

        KeyGenerator _generator = KeyGenerator.getInstance("AES");
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        secureRandom.setSeed(strPassword.getBytes());
        _generator.init(128, secureRandom);
        return _generator.generateKey();

Notes

• It's not a complete implemention.
• reference [https://github.com/bombworm/SHA1PRNG]