Erykai\Cryption\TraitCryption::decryption()

Complexity

Conditions	3
Paths	3

Size

Total Lines	20
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	2	Features	0

<?php
    protected function decryption(string $encryption): ?string
    {
        if (!ctype_xdigit($encryption)) {
            return null;
        }
        if (strlen($encryption) % 2 !== 0) {
            return null;
        }

        $encryption = hex2bin($encryption);

        $encryption = base64_decode($encryption);
        [$encrypted_data, $decryption_key, $encryption_iv] = explode(".", $encryption);

        $encryption_iv = hex2bin($encryption_iv);

        $combined_key = CRYPTION_KEY . hex2bin($decryption_key);

        return openssl_decrypt($encrypted_data, CRYPTION_CIPHERING,
            $combined_key, 0, $encryption_iv);
    }