sodium_crypto_aead_chacha20poly1305_decrypt	sodium_crypto_aead_chacha20poly1305_ietf_decrypt

Sodium Functions	Last updated: Mon, 26 Oct 2026

sodium_crypto_aead_chacha20poly1305_encrypt

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_chacha20poly1305_encrypt — Encrypt then authenticate with ChaCha20-Poly1305

function sodium_crypto_aead_chacha20poly1305_encrypt(
    #[\SensitiveParameter] string $message,
    string $additional_data,
    string $nonce,
    #[\SensitiveParameter] string $key
): string

Encrypt then authenticate with ChaCha20-Poly1305.

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. 8 bytes long.
key: Encryption key (256-bit).

Returns the ciphertext and authentication tag as a string of raw binary bytes.

sodium_crypto_aead_chacha20poly1305_decrypt	sodium_crypto_aead_chacha20poly1305_ietf_decrypt

Sodium Functions	Last updated: Mon, 26 Oct 2026