What are the best practices for passing arguments to openssl functions in PHP?

When passing arguments to openssl functions in PHP, it is important to properly format and validate the input to prevent security vulnerabilities such as injection attacks. To ensure safe usage, it is recommended to use the `escapeshellarg()` function to escape special characters in the arguments before passing them to openssl functions. 

// Example of passing arguments to openssl functions using escapeshellarg()

// Input arguments
$file = '/path/to/file.txt';
$passphrase = 'my_secure_passphrase';

// Escape special characters in arguments
$file = escapeshellarg($file);
$passphrase = escapeshellarg($passphrase);

// Call openssl function with escaped arguments
$output = shell_exec("openssl enc -aes-256-cbc -in $file -pass pass:$passphrase");

Keywords

openssl functions arguments PHP security

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