/ 
Crypt-DSA-1.17
River stage one • 2 direct dependents • 6 total dependents
/ Crypt::DSA::Util
Security Advisories (1)
CVE-2011-3599 (2011-10-10)

The Crypt::DSA (aka Crypt-DSA) module 1.17 and earlier for Perl, when /dev/random is absent, uses the Data::Random module, which makes it easier for remote attackers to spoof a signature, or determine the signing key of a signed message, via a brute-force attack.

NAME

Crypt::DSA::Util - DSA Utility functions

SYNOPSIS

use Crypt::DSA::Util qw( func1 func2 ... );

DESCRIPTION

Crypt::DSA::Util contains a set of exportable utility functions used through the Crypt::DSA set of libraries.

bitsize($n)

Returns the number of bits in the Math::Pari integer object $n.

bin2mp($string)

Given a string $string of any length, treats the string as a base-256 representation of an integer, and returns that integer, a Math::Pari object.

mp2bin($int)

Given a biginteger $int (a Math::Pari object), linearizes the integer into an octet string, and returns the octet string.

mod_exp($a, $exp, $n)

Computes $a ^ $exp mod $n and returns the value. The calculations are done using Math::Pari, and the return value is a Math::Pari object.

mod_inverse($a, $n)

Computes the multiplicative inverse of $a mod $n and returns the value. The calculations are done using Math::Pari, and the return value is a Math::Pari object.

AUTHOR & COPYRIGHTS

Please see the Crypt::DSA manpage for author, copyright, and license information.