lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

This is new

$ lwp-download "https://google.com"
lwp-download: 500 Can't verify SSL peers without knowning which Certif
+icate Authorities to trust
[download]

$ perl -d:Modlist -S lwp-download "https://google.com"

lwp-download: 500 Can't verify SSL peers without knowning which Certif
+icate Authorities to trust

AutoLoader             5.71
Carp                   1.17
Config
Config_git.pl
Config_heavy.pl
DynaLoader             1.10
Encode                 2.42
Encode::Alias          2.13
Encode::Byte           2.04
Encode::Config         2.05
Encode::Encoding       2.05
Encode::Locale         1.01
Errno                  1.11
Exporter             5.64_01
Exporter::Heavy      5.64_01
Fcntl                  1.06
File::Spec             3.33
File::Spec::Unix       3.33
File::Spec::Win32      3.33
FileHandle             2.02
Getopt::Std            1.06
HTTP::Config           6.00
HTTP::Date             6.00
HTTP::Headers          6.00
HTTP::Message          6.01
HTTP::Request          6.00
HTTP::Response         6.01
HTTP::Status           6.00
IO                   1.25_02
IO::File               1.14
IO::Handle             1.28
IO::Seekable            1.1
IO::Socket             1.31
IO::Socket::INET       1.31
IO::Socket::SSL        1.39
IO::Socket::UNIX       1.23
LWP                    6.00
LWP::ConnCache         6.00
LWP::MediaTypes        6.01
LWP::MemberMixin
LWP::Protocol          6.00
LWP::Protocol::http
LWP::Protocol::https
LWP::UserAgent         6.00
List::Util             1.23
Net::HTTP              6.00
Net::HTTP::Methods     6.00
Net::HTTPS             6.00
Net::IDN::Encode        1.1
Net::IDN::Nameprep      1.1
Net::IDN::Punycode    1.000
Net::IDN::Punycode::PP  1.000
Net::SSLeay            1.36
Scalar::Util           1.23
SelectSaver            1.02
Socket                 1.87
Storable               2.25
Symbol                 1.07
Time::Local          1.2000
URI                    1.58
URI::Escape            3.30
URI::_generic
URI::_idna
URI::_punycode         0.03
URI::_query
URI::_server
URI::http
URI::https
Unicode::Normalize     1.10
Unicode::Stringprep   1.103
Unicode::Stringprep::BiDi   1.10
Unicode::Stringprep::Mapping   1.10
Unicode::Stringprep::Prohibited   1.10
Unicode::Stringprep::Unassigned   1.10
Unicode::Stringprep::_Common   1.10
XSLoader               0.10
base                   2.15
bytes                  1.04
constant               1.20
integer                1.00
overload               1.10
unicore::Heavy.pl
unicore::To::Lower.pl
unicore::lib::Perl::SpacePer.pl
utf8                   1.08
utf8_heavy.pl
vars                   1.01
warnings               1.09
warnings::register     1.01
[download]

What do I do?

Comment on lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust Select or Download Code

Replies are listed 'Best First'.
Re: lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust by Corion (Patriarch) on Mar 09, 2011 at 11:30 UTC
Install Mozilla::CA, see Changes for LWP::UserAgent 6.00.	[reply]
Re^2: lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust by Anonymous Monk on Mar 09, 2011 at 11:41 UTC
Thank you thank you thank you. Usually I'm keen check to Changes, etc etc Now I feel the error message should mention Mozilla::CA / PERL_LWP_SSL_VERIFY_HOSTNAME explicitly	[reply]
Re^2: lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust by Anonymous Monk on Mar 11, 2011 at 18:50 UTC
Thank you from the bottom of my heart. I hope you earn much good karma for posting the solution!	[reply]
Re^2: lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust by superl (Initiate) on Oct 21, 2014 at 07:25 UTC
Thank you! This helped get Net::Twitter::Lite working with Net::OAuth and SSL. Adding comment to aid searching.	[reply]
Re: lwp-download: 500 Can't verify SSL peers without knowning which Certificate Authorities to trust by gideondsouza (Pilgrim) on Dec 29, 2012 at 07:40 UTC
I was getting this error while doing twitter authentication with Dancer. So for the total perl newbies like me, what the answer post is saying i, you need to reinstall/update LWP::UserAgent and install/update Mozilla::CA. `sudo cpan install LMP::UserAgen Mozilla::CA` [download] This is what fixed it for me.	[reply] [d/l]

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