(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_aead_chacha20poly1305_ietf_encrypt — Encrypt a message
$message
,$additional_data
,$nonce
,$key
Encrypt then authenticate with ChaCha20-Poly1305 (IETF variant).
The IETF variant uses 96-bit nonces and 32-bit internal counters, instead of 64-bit for both.
message
The plaintext message to encrypt.
additional_data
Additional, authenticated data. This is used in the verification of the authentication tag appended to the ciphertext, but it is not encrypted or stored in the ciphertext.
nonce
A number that must be only used once, per message. 12 bytes long.
key
Encryption key (256-bit).
Returns the ciphertext and tag on success, or false
on failure.