1 <?php

     2 

     3 if (!is_callable('sodium_crypto_stream_xchacha20')) {

     4     /**

     5      * @see ParagonIE_Sodium_Compat::crypto_stream_xchacha20()

     6      * @param int $len

     7      * @param string $nonce

     8      * @param string $key

     9      * @return string

    10      * @throws SodiumException

    11      * @throws TypeError

    12      */

    13     function sodium_crypto_stream_xchacha20($len, $nonce, $key)

    14     {

    15         return ParagonIE_Sodium_Compat::crypto_stream_xchacha20($len, $nonce, $key, true);

    16     }

    17 }

    18 if (!is_callable('sodium_crypto_stream_xchacha20_keygen')) {

    19     /**

    20      * @see ParagonIE_Sodium_Compat::crypto_stream_xchacha20_keygen()

    21      * @return string

    22      * @throws Exception

    23      */

    24     function sodium_crypto_stream_xchacha20_keygen()

    25     {

    26         return ParagonIE_Sodium_Compat::crypto_stream_xchacha20_keygen();

    27     }

    28 }

    29 if (!is_callable('sodium_crypto_stream_xchacha20_xor')) {

    30     /**

    31      * @see ParagonIE_Sodium_Compat::crypto_stream_xchacha20_xor()

    32      * @param string $message

    33      * @param string $nonce

    34      * @param string $key

    35      * @return string

    36      * @throws SodiumException

    37      * @throws TypeError

    38      */

    39     function sodium_crypto_stream_xchacha20_xor($message, $nonce, $key)

    40     {

    41         return ParagonIE_Sodium_Compat::crypto_stream_xchacha20_xor($message, $nonce, $key, true);

    42     }

    43 }