CONFIG_CRYPTO_LIB_SHA1 (not configurable)

modulename: libsha1.ko

configname: CONFIG_CRYPTO_LIB_SHA1

Linux Kernel Configuration
└─>Library routines
└─>Crypto library routines
└─>CRYPTO_LIB_SHA1
In linux kernel since version 6 (release Date: 2022-10-02)  
source code:
lib/crypto/