(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_aead_chacha20poly1305_decrypt — Verify then decrypt with ChaCha20-Poly1305
$ciphertext
,$additional_data
,$nonce
,$key
Verify then decrypt with ChaCha20-Poly1305.
ciphertext
Must be in the format provided by sodium_crypto_aead_chacha20poly1305_encrypt() (ciphertext and tag, concatenated).
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 plaintext on success, or false
on failure.