International PHP Conference Munich 2021


(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_xchacha20poly1305_ietf_decrypt(Preferred) Verify then decrypt with XChaCha20-Poly1305


sodium_crypto_aead_xchacha20poly1305_ietf_decrypt ( string $ciphertext , string $additional_data , string $nonce , string $key ) : string|false

Verify then decrypt with ChaCha20-Poly1305 (eXtended-nonce variant).

Generally, XChaCha20-Poly1305 is the best of the provided AEAD modes to use.



Must be in the format provided by sodium_crypto_aead_chacha20poly1305_ietf_encrypt() (ciphertext and tag, concatenated).


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.


A number that must be only used once, per message. 24 bytes long. This is a large enough bound to generate randomly (i.e. random_bytes()).


Encryption key (256-bit).

Valor Retornado

Returns the plaintext on success, ou false em caso de falha.

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