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README.pod

NAME

Crypt::NSS::X509 - Perl interface for the certificate handling parts of the NSS api.

SYNOPSIS

  use 5.10.1;
  use Perl6::Slurp;

  use Crypt::NSS::X509;

  my $cert = Crypt::NSS::X509::Certificate->new(slurp('derfile'));

  say $cert->subject();
  say $cert->issuer();

  my $valid = $cert->verify_cert();

  if ( ! $cert->match_name('www.testdomain') ) {
    # Domain does not match certificate information
    exit(1);
  }

ABSTRACT

Perl interface for the certificate handling parts of the NSS API.

DESCRIPTION

This library exposes a relatively simple API to a the NSS certificate API. It allows a user to load certificates, examine them by getting e.g. the subject, issuer, validity times and other information.

Furthermore, a user can validate a certificate with several of the verification functions provided by NSS.

Please note that this is a very early version of the library, the interface API will change.

This document just describes the NSS class and how to load it; for certificate parsing you probably want to refer to Crypt::NSS::X509::Certificate

EXPORT

None.

INITIALIZATION

The NSS module can be loaded in two different ways. The simplest way is to load the module without any options.

  use NSS;

In this case, the NSS library is initialized without any disk based database. It is not possible to load certificates and store them permanently. This mode is primarily useful when no certificate verification is desired.

The second way to load NSS is to specify the path to a database directory at load time. The directory has to exist. If no NSS database exists in the specified directory, it is automatically generated

  use NSS (':dpath', $dbdir);

A third option for loading NSS without any initialization is also offered. It should however not be used in normal operation - about the only reason to use it is if you have to switch between several different root-stores while running a script. If you absolutely need it, examine the source :).

FUNCTIONS

Note that all functions are called as functions, not methods.

Crypt::NSS::X509::load_rootlist($filename)

This function reads a list of pem-formatted certificates from $filename. The certificates are then loaded into the NSS database and marked as valid, trusted root-certificates.

Note that this function requires a NSS database.

Crypt::NSS::X509::add_cert_to_db($cert, $nick)

This function adds a specified Crypt::NSS::X509::Certificate to the active NSS database and stores it using the nickname $nick.

Crypt::NSS::X509::add_trusted_cert_to_db($cert, $nick)

This function adds a specified Crypt::NSS::X509::Certificate to the active NSS database and stores it using the nickname c<$nick>. The certificate is marked as trusted for all purposes. Used by Crypt::NSS::X509::load_rootlist to add the certificates.

Crypt::NSS::X509::dump_certificate_cache_info()

This function dumps the current contents of the NSS certificate cache and the NSS temporary certificate store to the standard output

Crypt::NSS::X509::_reinit()

This function shuts down the NSS library and reinitialized it again with the exact same parameters. Do not use this if you do not absolutely know what this encompasses / why it might be necessary.

Certificate usages

You can specify several different certificate usages for the verify functions in Crypt::NSS::X509::Certificate.

certUsageAnyCA

CA certificate of any kind.

certUsageEmailRecipient

Used to encrypt S/MIME mails.

certUsageEmailSigner

Used to verify S/MIME email signatures.

certUsageObjectSigner

Certificate allowed to sign executable code files like jar files.

certUsageSSLCA

SSL Certificate Authority certificate.

certUsageSSLClient

SSL Client certificate.

certUsageSSLServer

SSL Server certificate.

certUsageSSLServerWithStepUp

SSL Server certificate, which allows export clients to use strong cryptography.

certUsageStatusResponder

Used for OCSP responders.

certUsageProtectedObjectSigner =item certUsageUserCertImport =item certUsageVerifyCA

TODO: Find out what those do.

SEE ALSO

OpenSSL(1), Crypt::X509, Crypt::NSS

AUTHOR

Johanna Amann, <johanna@icir.org>

COPYRIGHT AND LICENSE

Copyright 2012 by Johanna Amann

This Library is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

The library contains source code of the Mozilla Network Security Services; for NSS license information please see http://www.mozilla.org/projects/security/pki/nss/.

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