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Crypt::RSA::Errorhandler.3pm
Langue: en
Version: 2008-07-06 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
Crypt::RSA::Errorhandler - Error handling mechanism for Crypt::RSA.SYNOPSIS
package Foo; use Crypt::RSA::Errorhandler; @ISA = qw(Crypt::RSA::Errorhandler); sub alive { .. .. return $self->error ("Awake, awake! Ring the alarum bell. \ Murther and treason!", $dagger) if $self->murdered($king); } package main; use Foo; my $foo = new Foo; $foo->alive($king) or print $foo->errstr(); # prints "Awake, awake! ... "
DESCRIPTION
Crypt::RSA::Errorhandler encapsulates the error handling mechanism used by the modules in Crypt::RSA bundle. Crypt::RSA::Errorhandler doesn't have a constructor and is meant to be inherited. The derived modules use its two methods, error() and errstr(), to communicate error messages to the caller.When a method of the derived module fails, it calls $self->error() and returns undef to the caller. The error message passed to error() is made available to the caller through the errstr() accessor. error() also accepts a list of sensitive data that it wipes out (undef'es) before returning.
The caller should never call errstr() to check for errors. errstr() should be called only when a method indicates (usually through an undef return value) that an error has occured. This is because errstr() is never overwritten and will always contain a value after the occurance of first error.
METHODS
- new()
- Barebones constructor.
- error($mesage, ($wipeme, $wipemetoo))
- The first argument to error() is $message which is placed in $self- >{errstr} and the remaining arguments are interpretted as variables containing sensitive data that are wiped out from the memory. error() always returns undef.
- errstr()
- errstr() is an accessor method for $self->{errstr}.
- errstrrst()
- This method sets $self->{errstr} to an empty string.
AUTHOR
Vipul Ved Prakash, <mail@vipul.net>SEE ALSO
Crypt::RSA(3)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre