sodium_crypto_aead_chacha20poly1305_ietf_decrypt

sodium_crypto_aead_chacha20poly1305_ietf_decrypt

Verify that the ciphertext includes a valid tag

 **sodium_crypto_aead_chacha20poly1305_ietf_decrypt** string $ciphertext string $additional_data string $nonce string $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 (ciphertext and tag, concatenated). sodium_crypto_aead_chacha20poly1305_ietf_encrypt

additional_dataAdditional, 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.

nonceA number that must be only used once, per message. 12 bytes long.

keyEncryption key (256-bit).

Returns the plaintext on success, return.falseforfailure.