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.\"
.IX Title "Crypt::DSA::Util 3pm"
.TH Crypt::DSA::Util 3pm "2022-06-12" "perl v5.34.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Crypt::DSA::Util \- DSA Utility functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Crypt::DSA::Util qw( func1 func2 ... );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fICrypt::DSA::Util\fR contains a set of exportable utility functions
used through the \fICrypt::DSA\fR set of libraries.
.SS "bitsize($n)"
.IX Subsection "bitsize($n)"
Returns the number of bits in the \fIMath::Pari\fR integer object
\&\fI\f(CI$n\fI\fR.
.SS "bin2mp($string)"
.IX Subsection "bin2mp($string)"
Given a string \fI\f(CI$string\fI\fR of any length, treats the string as a
base\-256 representation of an integer, and returns that integer,
a \fIMath::Pari\fR object.
.SS "mp2bin($int)"
.IX Subsection "mp2bin($int)"
Given a biginteger \fI\f(CI$int\fI\fR (a \fIMath::Pari\fR object), linearizes
the integer into an octet string, and returns the octet string.
.ie n .SS "mod_exp($a, $exp, $n)"
.el .SS "mod_exp($a, \f(CW$exp\fP, \f(CW$n\fP)"
.IX Subsection "mod_exp($a, $exp, $n)"
Computes \f(CW$a\fR ^ \f(CW$exp\fR mod \f(CW$n\fR and returns the value. The calculations
are done using \fIMath::Pari\fR, and the return value is a \fIMath::Pari\fR
object.
.ie n .SS "mod_inverse($a, $n)"
.el .SS "mod_inverse($a, \f(CW$n\fP)"
.IX Subsection "mod_inverse($a, $n)"
Computes the multiplicative inverse of \f(CW$a\fR mod \f(CW$n\fR and returns the
value. The calculations are done using \fIMath::Pari\fR, and the
return value is a \fIMath::Pari\fR object.
.SH "AUTHOR & COPYRIGHTS"
.IX Header "AUTHOR & COPYRIGHTS"
Please see the Crypt::DSA manpage for author, copyright,
and license information.