Man pages matching name digest::hmac_sha1 in section 3pm:

Digest::HMAC_SHA1.3pm.en	debian 10 / libdigest-hmac-perl
Digest::HMAC_SHA1.3pm.en	debian 11 / libdigest-hmac-perl
Digest::HMAC_SHA1.3pm.en	debian 12 / libdigest-hmac-perl