README

Generate the passphrase once and save it securely in your configuration

IMPORTANT: Ensure this passphrase is stored in a secure location (e.g., environment variables, secrets manager)

PHP:

$algo       = "aes-256-cfb";
$key_length = openssl_cipher_key_length();
$passphrase = openssl_random_pseudo_bytes($key_length);

// if you're planing to save this to the environment, better to make base64
$passphrase_base64 = base64_encode($passphrase);

Bash:

echo $(openssl rand -base64 32)

Use cases:

Algorithm	Integrity Check	Overhead	Usage Example
AES-256-GCM	✅ Yes	16-28 bytes, IV 12 bytes + Tag 4-12 bytes	Encrypting sensitive messages where data integrity is critical, e.g., API tokens. Storing sensitive configuration data with integrity protection. Optional authenticated additional data (AAD), not included in ciphertext but verified.
AES-256-CFB	❌ No	16 bytes, IV only	Streaming data encryption where low latency is required, e.g., video streaming.

anton-panfilov/cryptographer

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README 文档

README

Generate the passphrase once and save it securely in your configuration

PHP:

Bash:

Use cases:

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