PHP 8.1.0 RC 2 available for testing

sodium_crypto_aead_xchacha20poly1305_ietf_decrypt

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_xchacha20poly1305_ietf_decrypt(Preferred) Verify then decrypt with XChaCha20-Poly1305

Descrição

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.

Parâmetros

ciphertext

Must be in the format provided by sodium_crypto_aead_chacha20poly1305_ietf_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. 24 bytes long. This is a large enough bound to generate randomly (i.e. random_bytes()).

key

Encryption key (256-bit).

Valor Retornado

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

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