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sodium_crypto_aead_chacha20poly1305_ietf_decrypt

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_chacha20poly1305_ietf_decrypt — Verify that the ciphertext includes a valid tag

说明

sodium_crypto_aead_chacha20poly1305_ietf_decrypt(
    string $ciphertext,
    string $additional_data,
    string $nonce,
    #[\SensitiveParameter] string $key
): string|false

Verify then decrypt with ChaCha20-Poly1305 (IETF variant).

The IETF variant uses 96-bit nonces and 32-bit internal counters, instead of 64-bit for both.

参数

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. 12 bytes long.

key

Encryption key (256-bit).

返回值

Returns the plaintext on success, 或者在失败时返回 false.