Crypt(3)
NAME
Crypt::SSLeay - OpenSSL glue that provides LWP https support
SYNOPSIS
lwp-request https://www.nodeworks.com
use LWP::UserAgent;
my $ua = new LWP::UserAgent;
my $req = new HTTP::Request('GET', 'https://www.nodeworks.com');
my $res = $ua->request($req);
print $res->code."\n";
# PROXY SUPPORT
$ENV{HTTPS_PROXY} = 'http://proxy_hostname_or_ip:port';
# PROXY_BASIC_AUTH
$ENV{HTTPS_PROXY_USERNAME} = 'username';
$ENV{HTTPS_PROXY_PASSWORD} = 'password';
# DEFAULT SSL VERSION
$ENV{HTTPS_VERSION} = '3';
# CLIENT CERT SUPPORT
$ENV{HTTPS_CERT_FILE} = 'certs/notacacert.pem';
$ENV{HTTPS_KEY_FILE} = 'certs/notacakeynopass.pem';
# CA CERT PEER VERIFICATION
$ENV{HTTPS_CA_FILE} = 'certs/ca-bundle.crt';
$ENV{HTTPS_CA_DIR} = 'certs/';
# CLIENT PKCS12 CERT SUPPORT
$ENV{HTTPS_PKCS12_FILE} = 'certs/pkcs12.pkcs12';
$ENV{HTTPS_PKCS12_PASSWORD} = 'PKCS12_PASSWORD';
DESCRIPTION
This perl module provides support for the https protocol under LWP, so
that a LWP::UserAgent can make https GET & HEAD & POST requests. Please
see perldoc LWP for more information on POST requests.
The Crypt::SSLeay package contains Net::SSL, which is automatically
loaded by LWP::Protocol::https on https requests, and provides the nec-
essary SSL glue for that module to work via these deprecated modules:
Crypt::SSLeay::CTX
Crypt::SSLeay::Conn
Crypt::SSLeay::X509
Work on Crypt::SSLeay has been continued only to provide https support
for the LWP - libwww perl libraries. If you want access to the OpenSSL
API via perl, check out Sampo's Net::SSLeay.
INSTALL
OpenSSL
You must have OpenSSL or SSLeay installed before compiling this module.
You can get the latest OpenSSL package from:
http://www.openssl.org
When installing openssl make sure your config looks like:
> ./config --openssldir=/usr/local/openssl
or
> ./config --openssldir=/usr/local/ssl
then
> make
> make test
> make install
This way Crypt::SSLeay will pick up the includes and libraries automat-
ically. If your includes end up going into a separate directory like
/usr/local/include, then you may need to symlink
/usr/local/openssl/include to /usr/local/include
Crypt::SSLeay
The latest Crypt::SSLeay can be found at your nearest CPAN, and also:
http://www.perl.com/CPAN-local/modules/by-module/Crypt/
Once you have downloaded it, Crypt::SSLeay installs easily using the
make or nmake commands as shown below.
> perl Makefile.PL
> make
> make test
> make install
* use nmake for win32
!!! NOTE for Win32 users, few people seem to be able to build
W Crypt::SSLeay successfully on that platform. You don't need
I to because ActiveState has already compiled it for you,
N and is available for their perl builds 618 & 522 as a ppm
3 install. It may also be available for their latest build.
2 Keywords: WinNT, Win95, Win98, 95, 98, NT, 2000
!!! Please see http://www.activestate.com/
PROXY SUPPORT
LWP::UserAgent and Crypt::SSLeay have their own versions of proxy sup-
port. Please read these sections to see which one may be right for
you.
LWP::UserAgent Proxy Support
LWP::UserAgent has its own methods of proxying which may work for you
and is likely incompatible with Crypt::SSLeay proxy support. To use
LWP::UserAgent proxy support, try something like:
my $ua = new LWP::UserAgent;
$ua->proxy([qw( https http )], "$proxy_ip:$proxy_port");
At the time of this writing, libwww v5.6 seems to proxy https requests
fine with an Apache mod_proxy server. It sends a line like:
GET https://www.nodeworks.com HTTP/1.1
to the proxy server, which is not the CONNECT request that some proxies
would expect, so this may not work with other proxy servers than
mod_proxy. The CONNECT method is used by Crypt::SSLeay's internal
proxy support.
Crypt::SSLeay Proxy Support
For native Crypt::SSLeay proxy support of https requests, you need to
set an environment variable HTTPS_PROXY to your proxy server & port, as
in:
# PROXY SUPPORT
$ENV{HTTPS_PROXY} = 'http://proxy_hostname_or_ip:port';
$ENV{HTTPS_PROXY} = '127.0.0.1:8080';
Use of the HTTPS_PROXY environment variable in this way is similar to
LWP::UserAgent->env_proxy() usage, but calling that method will likely
override or break the Crypt::SSLeay support, so do not mix the two.
Basic auth credentials to the proxy server can be provided this way:
# PROXY_BASIC_AUTH
$ENV{HTTPS_PROXY_USERNAME} = 'username';
$ENV{HTTPS_PROXY_PASSWORD} = 'password';
For an example of LWP scripting with Crypt::SSLeay native proxy sup-
port, please see the source of the ./lwp-ssl-test script in the
Crypt::SSLeay distribution.
CLIENT CERTIFICATE SUPPORT
Certificate support is new provided by patches from Tobias Manthey. Is
ALPHA as of .25, but looking pretty stable as of .29.
PEM encoded certificate and private key files may be used like this:
$ENV{HTTPS_CERT_FILE} = 'certs/notacacert.pem';
$ENV{HTTPS_KEY_FILE} = 'certs/notacakeynopass.pem';
You may test your files with the ./net_ssl_test program by issuing a
command like:
./net_ssl_test -cert=certs/notacacert.pem -key=certs/notacakeynopass.pem -d GET $HOST_NAME
Additionally, if you would like to tell the client where the CA file
is, you may set these. These *CA* configs are ALPHA as of version .29.
$ENV{HTTPS_CA_FILE} = "some_file";
$ENV{HTTPS_CA_DIR} = "some_dir";
There is no sample CA cert file at this time for testing, but you may
configure ./net_ssl_test to use your CA cert with the -CAfile option.
Creating a Test Certificate
To create simple test certificates with openssl, you may:
/usr/local/openssl/bin/openssl req -config /usr/local/openssl/openssl.cnf -new -days 365 -newkey rsa:1024 -x509 -keyout notacakey.pem -out notacacert.pem
To remove the pass phrase from the key file, execute this:
/usr/local/openssl/bin/openssl rsa -in notacakey.pem -out nota-
cakeynopass.pem
PKCS12
New as of version .45 is PKCS12 certificate support thanks to Daisuke
Kuroda The directives for enabling use of these certificates is:
$ENV{HTTPS_PKCS12_FILE} = 'certs/pkcs12.pkcs12';
$ENV{HTTPS_PKCS12_PASSWORD} = 'PKCS12_PASSWORD';
Use of this type of certificate will take precedence over previous cer-
tificate settings described.
SSL VERSIONS
Crypt::SSLeay tries very hard to connect to ANY SSL web server trying
to accomodate servers that are buggy, old or simply not standards
compliant. To this effect, this module will try SSL connections in
this order:
SSL v23 - should allow v2 & v3 servers to pick their best type
SSL v3 - best connection type
SSL v2 - old connection type
Unfortunately, some servers seem not to handle a reconnect to SSL v3
after a failed connect of SSL v23 is tried, so you may set before using
LWP or Net::SSL:
$ENV{HTTPS_VERSION} = 3;
so that a SSL v3 connection is tried first. At this time only a SSL v2
connection will be tried after this, as the connection attempt order
remains unchanged by this setting.
COMPATIBILITY
This module has been compiled on the following platforms:
PLATFORM CPU SSL PERL VER DATE WHO
-------- --- --- ---- --- ---- ---
WinNT SP6 x86 OpenSSL 0.9.6a 5.00601 .45 2002-08-01 Joshua Chamas
Linux 2.4.7 x86 OpenSSL 0.9.6d 5.00800 .45 2002-08-01 Joshua Chamas
Linux 2.4.7 x86 OpenSSL 0.9.6 5.00601 .39 2002-06-23 Joshua Chamas
Solaris 2.8 Sparc ? 5.00503 .37 2002-05-31 Christopher Biow
OpenBSD 2.8 Sparc ? 5.00600 .25 2001-04-11 Tim Ayers
Linux 2.2.14 x86 OpenSSL 0.9.6 5.00503 .25 2001-04-10 Joshua Chamas
WinNT SP6 x86 OpenSSL 0.9.4 5.00404 .25 2001-04-10 Joshua Chamas
Solaris 2.7 Sparc OpenSSL 0.9.6 5.00503 .22 2001-03-01 Dave Paris
AIX 4.3.2 RS/6000 OpenSSL 0.9.6 5.6.0 .19 2001-01-08 Peter Heimann
Solaris 2.6 x86 OpenSSL 0.9.5a 5.00501 .17 2000-09-04 Joshua Chamas
Linux 2.2.12 x86 OpenSSL 0.9.5a 5.00503 .16 2000-07-13 David Harris
FreeBSD 3.2 ?x86 OpenSSL 0.9.2b 5.00503 ? 1999-09-29 Rip Toren
Solaris 2.6 ?Sparc OpenSSL 0.9.4 5.00404 ? 1999-08-24 Patrick Killelea
FreeBSD 2.2.5 x86 OpenSSL 0.9.3 5.00404 ? 1999-08-19 Andy Lee
Solaris 2.5.1 USparc OpenSSL 0.9.4 5.00503 ? 1999-08-18 Marek Rouchal
Solaris 2.6 x86 SSLeay 0.8.0 5.00501 ? 1999-08-12 Joshua Chamas
Linux 2.2.10 x86 OpenSSL 0.9.4 5.00503 ? 1999-08-11 John Barrett
WinNT SP4 x86 SSLeay 0.9.2 5.00404 ? 1999-08-10 Joshua Chamas
BUILD NOTES
Win32, WinNT, Win2000, can't build
If you cannot get it to build on your windows box, try ActiveState
perl, at least their builds 522 & 618 are known to have a ppm install
of Crypt::SSLeay available. Please see http://www.activestate.com for
more info.
AIX 4.3.2 - Symbol Error: __umoddi3 : referenced symbol not found
The __umoddi3 problem applies here as well when compiling with gcc.
Alternative solution: In Makefile.PL, prepend "-L"/usr/local/<path to
your gcc lib>/<version> to the $LIBS value. Add after line 82:
$LIBS = '-L' . dirname(`gcc -print-libgcc-file-name`) . ' ' . $LIBS;
Solaris x86 - Symbol Error: __umoddi3 : referenced symbol not found
Problem:
On Solaris x86, the default PERL configuration, and preferred, is to
use the ld linker that comes with the OS, not gcc. Unfortunately dur-
ing the OpenSSL build process, gcc generates in libcrypto.a, from
bn_word.c, the undefined symbol __umoddi3, which is supposed to be
later resolved by gcc from libgcc.a
The system ld linker does not know about libgcc.a by default, so when
building Crypt::SSLeay, there is a linker error for __umoddi3
Solution:
The fix for this symlink your libgcc.a to some standard directory like
/usr/local/lib, so that the system linker, ld, can find it when build-
ing Crypt::SSLeay.
FreeBSD 2.x.x / Solaris - ... des.h:96 #error _ is defined ...
If you encounter this error: "...des.h:96: #error _ is defined, but
some strange definition the DES library cannot handle that...," then
you need to edit the des.h file and comment out the "#error" line.
Its looks like this error might be common to other operating systems,
and that occurs with OpenSSL 0.9.3. Upgrades to 0.9.4 seem to fix this
problem.
SunOS 4.1.4, Perl 5.004_04 - ld.so: Undefined symbol: _CRYPT_mem_ctrl
Problems: (initial build was fine, but execution of Perl scripts had
problems)
Got a message "ld.so: Undefined symbol: _CRYPT_mem_ctrl" solution: In
the Makefile, comment out the line with "-fpic" (also try changing to
"-fPIC", and this works also, not sure if one is preferred).
NOTES
Many thanks to Gisle Aas for the original writing of this module and
many others including libwww for perl. The web will never be the same
:)
Ben Laurie deserves kudos for his excellent patches for better error
handling, SSL information inspection, and random seeding.
James Woodyatt is a champ for finding a ridiculous memory leak that has
been the bane of many a Crypt::SSLeay user.
Thanks to Bryan Hart for his patch adding proxy support, and thanks to
Tobias Manthey for submitting another approach.
Thanks to Alex Rhomberg for Alpha linux ccc patch.
Thanks to Tobias Manthey for his patches for client certificate sup-
port.
Thanks to Gamid Isayev for CA cert support and insight into error mes-
saging.
Thanks to Jeff Long for working through a tricky CA cert SSLClientVer-
ify issue.
Thanks to Chip Turner for patch to build under perl 5.8.0
SUPPORT
For OpenSSL and Crypt::SSLeay support, please email the openssl user
mailing list at openssl-users@openssl.org
Emails to the list sent with at least Crypt::SSLeay in the subject line
will be responded to more quickly by myself. Please make the subject
line informative like
Subject: [Crypt::SSLeay] compile problems on Solaris
This module was originally written by Gisle Aas, and I am now maintain-
ing it.
COPYRIGHT
Copyright (c) 1999-2002 Joshua Chamas.
Copyright (c) 1998 Gisle Aas.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.8.0 2002-08-02 SSLeay(3)
Man(1) output converted with
man2html