Curve25519 scalar multiplication library

modulename: libcurve25519.ko

configname: CONFIG_CRYPTO_LIB_CURVE25519

Linux Kernel Configuration
└─>Cryptographic API
└─>Curve25519 scalar multiplication library
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Enable the Curve25519 library interface. This interface may be
fulfilled by either the generic implementation or an arch-specific
one, if one is available and enabled.

source code: