Encrypts a message using a nonce and a secret key (no authentication)

# sodium_crypto_stream_xchacha20_xor

(PHP 8 >= 8.1.0)

sodium_crypto_stream_xchacha20_xor — Encrypts a message using a nonce and a secret key (no authentication)

### Description

sodium_crypto_stream_xchacha20_xor(#[\SensitiveParameter] string `$message`, string `$nonce`, #[\SensitiveParameter] string `$key`): string

Encrypts a `message` using a `nonce` and a secret `key` (no authentication).

Caution

This encryption is unauthenticated, and does not prevent chosen-ciphertext attacks. Make sure to combine the ciphertext with a Message Authentication Code, for example with sodium_crypto_aead_xchacha20poly1305_ietf_encrypt() function, or sodium_crypto_auth().

### Parameters

`message`
  The message to encrypt.
`nonce`
  24-byte nonce.
`key`
  Key, possibly generated from sodium_crypto_stream_xchacha20_keygen().

### Return Values

Encrypted message.

### See Also

- sodium_crypto_stream_xchacha20_xor_ic() - Encrypts a message using a nonce and a secret key (no authentication)

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