CONFIG_CRYPTO_LIB_POLY1305 (not configurable)

modulename: libpoly1305.ko

configname: CONFIG_CRYPTO_LIB_POLY1305

Linux Kernel Configuration
└─>Library routines
└─>Crypto library routines
└─>CRYPTO_LIB_POLY1305
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
The Poly1305 library functions. Select this if your module uses any
of the functions from <crypto/poly1305.h>.

source code:
lib/crypto//