array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'function.sodium-crypto-aead-chacha20poly1305-ietf-decrypt.php', 1 => 'sodium_crypto_aead_chacha20poly1305_ietf_decrypt', ), 'up' => array ( 0 => 'ref.sodium.php', 1 => 'Sodium 函数', ), 'prev' => array ( 0 => 'function.sodium-crypto-aead-chacha20poly1305-encrypt.php', 1 => 'sodium_crypto_aead_chacha20poly1305_encrypt', ), 'next' => array ( 0 => 'function.sodium-crypto-aead-chacha20poly1305-ietf-encrypt.php', 1 => 'sodium_crypto_aead_chacha20poly1305_ietf_encrypt', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/sodium/functions/sodium-crypto-aead-chacha20poly1305-ietf-decrypt.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_aead_chacha20poly1305_ietf_decrypt — Verify that the ciphertext includes a valid tag
$ciphertext
,$additional_data
,$nonce
,$key
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.
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).
Returns the plaintext on success, 或者在失败时返回 false
.