Call to undefined function sodium_randombytes_buf()

Question

Hello I want to use the sodium_randombytes_buf function on a project that I'm working on. On my machine (docker image) I have installed php 7.2

PHP 7.2.9 (cli) (built: Aug 26 2018 05:23:42) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
    with Xdebug v2.6.1, Copyright (c) 2002-2018, by Derick Rethans
    with Zend OPcache v7.2.9, Copyright (c) 1999-2018, by Zend Technologies

pear

PEAR Version: 1.10.5
PHP Version: 7.2.9
Zend Engine Version: 3.2.0

sodium

sodium support => enabled
libsodium headers version => 1.0.15
libsodium library version => 1.0.15

and added the following line on composer.json of my project on the section require

"ext-sodium": "*"

If I run any other sodium function like

sodium_crypto_aead_aes256gcm_is_available

is working fine. If i try to run the following code

var_dump(sodium_randombytes_buf(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES));
exit;

I get the following error

Call to undefined function sodium_randombytes_buf()

Does anyone had similar issue?

Answer 1

When Sodium was added to PHP as a core extension, sodium_randombytes_buf was not brought along. Instead, you can use random_bytes which does the same thing.

random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES)