sodium_crypto_aead_chacha20poly1305_ietf_encrypt

sodium_crypto_aead_chacha20poly1305_ietf_encrypt

Encrypt a message

string **sodium_crypto_aead_chacha20poly1305_ietf_encrypt** string $message string $additional_data string $nonce string $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.

messageThe plaintext message to encrypt.

additional_dataAdditional, 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.

nonceA number that must be only used once, per message. 12 bytes long.

keyEncryption key (256-bit).

Returns the ciphertext and tag on success, return.falseforfailure.