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Manpage of SSLeay

SSLeay

Section: User Contributed Perl Documentation (3)
Updated: perl v5.6.1
Index
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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';
 

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 necessary 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 automatically. 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

For proxying web requests, like with LWP::UserAgent->proxy(), or lwp-request "-p" ..., 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 compatible with LWP::UserAgent->env_proxy() usage.

If we could find the current LWP object executing while in Net::SSL context, then we could support proxy() method too, but it does not seem feasible to do so at this time.

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';
 

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
 --------       ---     ---             ----     ---    ----            ---
 Solaris 2.7    SPARC   OpenSSL 0.9.6   5.00503  .22    2001-03-01      Dave Paris
 Linux 2.2.14   x86     OpenSSL 0.9.6   5.00503  .21    2001-01-10      Joshua Chamas
 WinNT SP6      x86     OpenSSL 0.9.4   5.00404  .21    2001-01-10      Joshua Chamas
 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 during 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 building 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.  

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.  

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 maintaining it.  

COPYRIGHT

 Copyright (c) 1999-2001 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.

 

Index

NAME
SYNOPSIS
DESCRIPTION
INSTALL
OpenSSL
Crypt::SSLeay
PROXY SUPPORT
SSL VERSIONS
COMPATIBILITY
BUILD NOTES
Win32, WinNT, Win2000, can't build
AIX 4.3.2 - Symbol Error: __umoddi3 : referenced symbol not found
Solaris x86 - Symbol Error: __umoddi3 : referenced symbol not found
FreeBSD 2.x.x / Solaris - ... des.h:96 #error _ is defined ...
NOTES
SUPPORT
COPYRIGHT
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