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Under GNU General Public License
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Crypt::KeyDerivation(3pm) User Contributed Perl Documentation Crypt::KeyDerivation(3pm)
NAME
Crypt::KeyDerivation - PBKDF1, PBKDF2 and HKDF key derivation functions
SYNOPSIS
use Crypt::KeyDerivation ':all';
### PBKDF1/2
$derived_key1 = pbkdf1($password, $salt, $iteration_count, $hash_name, $len);
$derived_key2 = pbkdf2($password, $salt, $iteration_count, $hash_name, $len);
### HKDF & co.
$derived_key3 = hkdf($keying_material, $salt, $hash_name, $len, $info);
$prk = hkdf_extract($keying_material, $salt, $hash_name);
$okm1 = hkdf_expand($prk, $hash_name, $len, $info);
DESCRIPTION
Provides an interface to Key derivation functions:
o PBKDF1 and PBKDF according to PKCS#5 v2.0 <https://tools.ietf.org/html/rfc2898>
o HKDF (+ related) according to <https://tools.ietf.org/html/rfc5869>
FUNCTIONS
pbkdf1
BEWARE: if you are not sure, do not use "pbkdf1" but rather choose "pbkdf2".
$derived_key = pbkdf1($password, $salt, $iteration_count, $hash_name, $len);
#or
$derived_key = pbkdf1($password, $salt, $iteration_count, $hash_name);
#or
$derived_key = pbkdf1($password, $salt, $iteration_count);
#or
$derived_key = pbkdf1($password, $salt);
# $password ......... input keying material (password)
# $salt ............. salt/nonce (expected length: 8)
# $iteration_count .. optional, DEFAULT: 5000
# $hash_name ........ optional, DEFAULT: 'SHA256'
# $len .............. optional, derived key len, DEFAULT: 32
pbkdf2
$derived_key = pbkdf2($password, $salt, $iteration_count, $hash_name, $len);
#or
$derived_key = pbkdf2($password, $salt, $iteration_count, $hash_name);
#or
$derived_key = pbkdf2($password, $salt, $iteration_count);
#or
$derived_key = pbkdf2($password, $salt);
# $password ......... input keying material (password)
# $salt ............. salt/nonce
# $iteration_count .. optional, DEFAULT: 5000
# $hash_name ........ optional, DEFAULT: 'SHA256'
# $len .............. optional, derived key len, DEFAULT: 32
hkdf
$okm2 = hkdf($password, $salt, $hash_name, $len, $info);
#or
$okm2 = hkdf($password, $salt, $hash_name, $len);
#or
$okm2 = hkdf($password, $salt, $hash_name);
#or
$okm2 = hkdf($password, $salt);
# $password ... input keying material (password)
# $salt ....... salt/nonce, if undef defaults to HashLen zero octets
# $hash_name .. optional, DEFAULT: 'SHA256'
# $len ........ optional, derived key len, DEFAULT: 32
# $info ....... optional context and application specific information, DEFAULT: ''
hkdf_extract
$prk = hkdf_extract($password, $salt, $hash_name);
#or
$prk = hkdf_extract($password, $salt, $hash_name);
# $password ... input keying material (password)
# $salt ....... salt/nonce, if undef defaults to HashLen zero octets
# $hash_name .. optional, DEFAULT: 'SHA256'
hkdf_expand
$okm = hkdf_expand($pseudokey, $hash_name, $len, $info);
#or
$okm = hkdf_expand($pseudokey, $hash_name, $len);
#or
$okm = hkdf_expand($pseudokey, $hash_name);
#or
$okm = hkdf_expand($pseudokey);
# $pseudokey .. input keying material
# $hash_name .. optional, DEFAULT: 'SHA256'
# $len ........ optional, derived key len, DEFAULT: 32
# $info ....... optional context and application specific information, DEFAULT: ''
perl v5.34.0 2022-02-06 Crypt::KeyDerivation(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2025-01-03 00:05 @18.221.116.226 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)