PHP Soap fill header credentials - php

Question

I'm connecting by Soap to a webservice and I need to fill the header credentials in order to login.
$user_id = 'MyUserId';
$unique_key = $this->getUniqueKey();
$base_password = $this->getFieldBase('MyPassword', $uniqueKey);
$base_date = $this->getFieldBase(gmdate('Y-m-d\TH:i:s\.00\Z'), $unique_key);
$nonce = $this->getFieldNonce($unique_key, '.myPemFile.pem');
<wss:UsernameToken>
<wss:Username>' . $user_id . '</wss:Username>
<wss:Password>' . $base_password . '</wss:Password>
<wss:Nonce>' . $nonce . '</wss:Nonce>
<wss:Created>' . $base_date . '</wss:Created>
</wss:UsernameToken>
All values (except username) as to follow a structure.
I have this working for a 5.6 PHP project but now I need to adapt it to a PHP 7 project, and that means I can no longer use mcrypt_encrypt() because it's deprecated and therefore I need to use openssl_encrypt()
My current functions are:
private function getFieldBase($data, $key)
{
$ivsize = openssl_cipher_iv_length('AES-128-ECB');
$iv = openssl_random_pseudo_bytes($ivsize);
$ciphertext = openssl_encrypt($data, 'AES-128-ECB', $key, 0, $iv);
return trim(base64_encode($ciphertext));
}
private function getFieldNonce($data, $pbkey)
{
openssl_public_encrypt($data, $crypttext, openssl_pkey_get_public(file_get_contents($pbkey)));
return base64_encode($crypttext);
}
private function getUniqueKey()
{
return substr(md5(uniqid(microtime())), 0, 16);
}
The problem is that when connecting to the Webservice I receive the error:
Rejected: Error: The key session is invalid. It was not
possible to decipher the field Created
Which tells me that my getFieldBase() function is wrong.

Answer 1

Solved.
The parameter RAW_OUTPUT must be true within the function openssl_encrypt.
private function getFieldBase($data, $key)
{
$ivsize = openssl_cipher_iv_length('AES-128-ECB');
$iv = openssl_random_pseudo_bytes($ivsize);
$ciphertext = openssl_encrypt($data, 'AES-128-ECB', $key, TRUE, $iv);
return base64_encode($ciphertext);
}