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<?php function insecureEncryptDoNotUse(string $plaintext, string $key): string { return \openssl_encrypt( $plaintext, 'aes-128-ctr', $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, str_repeat("\x00", 16) ); } function insecureDecryptDoNotUse(string $ciphertext, string $key): string { return \openssl_decrypt( $ciphertext, 'aes-128-ctr', $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, str_repeat("\x00", 16) ); } $key = str_repeat("3.14", 4); $ciphertextA = insecureEncryptDoNotUse('0000000000000001', $key); $xor = str_repeat("\x00", mb_strlen($ciphertextA, '8bit') - 1) . "\x40"; $ciphertextB = $ciphertextA ^ $xor; var_dump(\bin2hex(insecureDecryptDoNotUse($ciphertextB, $key)));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Call to undefined function openssl_encrypt() in /in/1XAGa:6 Stack trace: #0 /in/1XAGa(28): insecureEncryptDoNotUse('000000000000000...', '3.143.143.143.1...') #1 {main} thrown in /in/1XAGa on line 6
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught Error: Call to undefined function openssl_encrypt() in /in/1XAGa:6 Stack trace: #0 /in/1XAGa(28): insecureEncryptDoNotUse('000000000000000...', '3.143.143.143.1...') #1 {main} thrown in /in/1XAGa on line 6
Process exited with code 255.
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/1XAGa on line 4
Process exited with code 255.
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191.8 ms | 401 KiB | 291 Q