# phpman > man > Digest::HMAC_SHA1

## NAME
    [Digest::HMAC_SHA1](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3AHMACSHA1/markdown) - Keyed-Hashing for Message Authentication

## SYNOPSIS
     # Functional style
     use [Digest::HMAC_SHA1](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3AHMACSHA1/markdown) qw(hmac_sha1 hmac_sha1_hex);
     $digest = hmac_sha1($data, $key);
     print hmac_sha1_hex($data, $key);

     # OO style
     use [Digest::HMAC_SHA1](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3AHMACSHA1/markdown);
     $hmac = [Digest::HMAC_SHA1](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3AHMACSHA1/markdown)->new($key);

     $hmac->add($data);
     $hmac->addfile(*FILE);

     $digest = $hmac->digest;
     $digest = $hmac->hexdigest;
     $digest = $hmac->b64digest;

## DESCRIPTION
    This module provide HMAC-SHA-1 hashing.

## SEE ALSO
    [Digest::HMAC](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3AHMAC/markdown), [Digest::SHA](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3ASHA/markdown), [Digest::HMAC_MD5](https://www.chedong.com/phpMan.php/perldoc/Digest%3A%3AHMACMD5/markdown)

## MAINTAINER
    Andrew Rodland <<arodland@cpan.org>>

## ORIGINAL AUTHOR
    Gisle Aas <<gisle@aas.no>>