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 4.14.326 (release Date: 2023-09-23)  
The SHA-1 and HMAC-SHA1 library functions. Select this if your module
uses any of the functions from <crypto/sha1.h>.

source code:
lib/crypto//