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digest::hmac(3) [centos man page]

Digest::HMAC(3) 					User Contributed Perl Documentation					   Digest::HMAC(3)

Digest::HMAC - Keyed-Hashing for Message Authentication SYNOPSIS
# Functional style use Digest::HMAC qw(hmac hmac_hex); $digest = hmac($data, $key, &myhash); print hmac_hex($data, $key, &myhash); # OO style use Digest::HMAC; $hmac = Digest::HMAC->new($key, "Digest::MyHash"); $hmac->add($data); $hmac->addfile(*FILE); $digest = $hmac->digest; $digest = $hmac->hexdigest; $digest = $hmac->b64digest; DESCRIPTION
HMAC is used for message integrity checks between two parties that share a secret key, and works in combination with some other Digest algorithm, usually MD5 or SHA-1. The HMAC mechanism is described in RFC 2104. HMAC follow the common "Digest::" interface, but the constructor takes the secret key and the name of some other simple "Digest::" as argument. The hmac() and hmac_hex() functions and the Digest::HMAC->new() constructor takes an optional $blocksize argument as well. The HMAC algorithm assumes the digester to hash by iterating a basic compression function on blocks of data and the $blocksize should match the byte-length of such blocks. The default $blocksize is 64 which is suitable for the MD5 and SHA-1 digest functions. For stronger algorithms the blocksize probably needs to be increased. SEE ALSO
Digest::HMAC_MD5, Digest::HMAC_SHA1 RFC 2104 AUTHORS
Graham Barr <>, Gisle Aas <> perl v5.16.3 2011-07-25 Digest::HMAC(3)

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SHA1(3) 						User Contributed Perl Documentation						   SHA1(3)

Digest::SHA1 - Perl interface to the SHA-1 Algorithm SYNOPSIS
# Functional style use Digest::SHA1 qw(sha1 sha1_hex sha1_base64); $digest = sha1($data); $digest = sha1_hex($data); $digest = sha1_base64($data); # OO style use Digest::SHA1; $ctx = Digest::SHA1->new; $ctx->add($data); $ctx->addfile(*FILE); $digest = $ctx->digest; $digest = $ctx->hexdigest; $digest = $ctx->b64digest; DESCRIPTION
The "Digest::SHA1" module allows you to use the NIST SHA-1 message digest algorithm from within Perl programs. The algorithm takes as input a message of arbitrary length and produces as output a 160-bit "fingerprint" or "message digest" of the input. The "Digest::SHA1" module provide a procedural interface for simple use, as well as an object oriented interface that can handle messages of arbitrary length and which can read files directly. A binary digest will be 20 bytes long. A hex digest will be 40 characters long. A base64 digest will be 27 characters long. FUNCTIONS
The following functions can be exported from the "Digest::SHA1" module. No functions are exported by default. sha1($data,...) This function will concatenate all arguments, calculate the SHA-1 digest of this "message", and return it in binary form. sha1_hex($data,...) Same as sha1(), but will return the digest in hexadecimal form. sha1_base64($data,...) Same as sha1(), but will return the digest as a base64 encoded string. METHODS
The "Digest::SHA1" module provide the standard "Digest" OO-interface. The constructor looks like this: $sha1 = Digest->new('SHA-1') $sha1 = Digest::SHA1->new The constructor returns a new "Digest::SHA1" object which encapsulate the state of the SHA-1 message-digest algorithm. You can add data to the object and finally ask for the digest using the methods described in Digest. SEE ALSO
Digest, Digest::HMAC_SHA1, Digest::MD5 COPYRIGHT
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Copyright 1999-2001 Gisle Aas. Copyright 1997 Uwe Hollerbach. AUTHORS
Peter C. Gutmann, Uwe Hollerbach <>, Gisle Aas <> perl v5.8.0 2001-12-30 SHA1(3)
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