Need help to convert mcrypt to openssl


I need help to convert mcrypt code to openssl. Currently I am using mcrypt but that is not supported anymore with php 7.3, I need help to convert it to openssl. Any help is appericiated.

The code is following:

	protected function encryptAndEncode($strIn) {
		$strIn = $this->pkcs5_pad($strIn, 16);
		return "@".bin2hex(@mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $this->encryptPassword, $strIn, MCRYPT_MODE_CBC, $this->encryptPassword));

	protected function decodeAndDecrypt($strIn) {
		$strIn = substr($strIn, 1);
		$strIn = pack('H*', $strIn);
		return @mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $this->encryptPassword, $strIn, MCRYPT_MODE_CBC, $this->encryptPassword);

Thanks in advance.

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