After some reading and samples I've been trying to use libsodium in an Azure website.
Since I read that sodium would be part of the php core since 7.2 and php site shows
no additional configuration is needed
tried Windows with fastcgi and Linux
phpinfo() shows sodium in both of them yet i cannot use it , as exampled in https://paragonie.com/book/pecl-libsodium/read/08-advanced.md#crypto-aead-aes256gcm because all i get is
Fatal error: Uncaught Error: Call to undefined function sodium_crypto_aead_aes256gcm_is_available()
my phpinfo ->
PHP Version 7.2.1
System Linux 737d7217d54e 4.4.0-119-generic #143-Ubuntu SMP Mon Apr 2 16:08:24 UTC 2018 x86_64
Server API Apache 2.0 Handler
PHP API 20170718
PHP Extension 20170718
Zend Extension 320170718
Zend Extension Build API320170718,NTS
PHP Extension Build API20170718,NTS
....
Sodium Frank Denis
....
thank you all for the help
I had this same problem -- Azure support sent me this fix and it seems to fix libsodium issue in PHP 7.3 (7.2 is likely the same fix) -
You need to create a settings.ini file and the .ini file should include the following:
extension=sodium
And add the PHP_INI_SCAN_DIR app setting in the azure portal to load the .ini files.