The easiest way to deal with self-signed certificates is to expect exactly this certificate. This can be done with the SSL_fingerprint argument of IO::Socket::SSL which you can set using ssl_opts in LWP. With this argument all other checks (subject matches hostname, expiration...) are disabled.
You need at least IO::Socket::SSL version 1.980 for this (released 04/2014). See the documentation of SSL_fingerprint for details but in short:

To get the current fingerprint analyze the servers certificate or get the fingerprint from a trusted location with:

use IO::Socket::SSL;
my $cl = IO::Socket::SSL->new(
    PeerAddr => "ip:port", 
    SSL_verify_mode => 0
);
print $cl->get_fingerprint."\n"; # sha256$b64d26746ca1cd5403....

[download]

And to use it:

my $ua = LWP::UserAgent->new...
$ua->ssl_opts(SSL_fingerprint => 'sha256$b64...');

[download]

In reply to Re^3: https using lwp (WWW::Mechanize) by noxxi
in thread https using lwp by Gorby

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.