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lucianonapoli at yahoo dot it
8 years ago
The parameter string $password must be in binary form and is derived from the exadecimal key value.

Example:

encrypting in command line console with openssl
openssl AES-256-CBC -K 5ae1b8a17bad4da4fdac796f64c16ecd -iv 34857d973953e44afb49ea9d61104d8c -in doc.txt -out doc.enc.txt

decripting in php
$key = hex2bin('5ae1b8a17bad4da4fdac796f64c16ecd');
$iv = hex2bin('34857d973953e44afb49ea9d61104d8c');

$output = openssl_decrypt($encstr, 'AES-256-CBC', $key, OPENSSL_RAW_DATA, $iv);

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