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<?php $cipher = 'AES-256-CBC'; $cipher = 'AES-256-CFB8'; $mode = strtolower(substr($cipher, strrpos($cipher, '-') - strlen($cipher))); $ivSize = openssl_cipher_iv_length($cipher); $blockSize = $ivSize > 0 ? $ivSize : openssl_cipher_iv_length(str_ireplace('-' . $mode, '', $cipher)); var_dump($mode); var_dump($ivSize); var_dump($blockSize);
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Call to undefined function openssl_cipher_iv_length() in /in/iX0DF:6 Stack trace: #0 {main} thrown in /in/iX0DF on line 6
Process exited with code 255.
Output for 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.0
string(5) "-cfb8" int(16) int(16)
preferences:
161.14 ms | 402 KiB | 184 Q