PR: 732
Submitted by: Ilya Zakharevich <nospam-abuse@ilyaz.org>
Submitter's comment:
This patch:
a) Introduces a new file os2/backwardify.pl.
b) Introduces a new mk1mf.pl variable $preamble. As you can see, it may
be used also to move some OS-specific code to VC-CE too (the the
first chunk of the patch);
c) The DESCRIPTION specifier of the .def file is made more informative:
now it contains the version number too. On OS/2 it is made conformant
to OS/2 conventions; in particular, when one runs the standard command
BLDLEVEL this.DLL
one can see:
Vendor: www.openssl.org/
Revision: 0.9.7c
Description: OpenSSL: implementation of Secure Socket Layer; DLL for library crypto. Build for EMX -Zmtd
[I did not make Win32 descriptions as informative as this - I'm afraid to
break something. Be welcome to fix this.]
d) On OS/2 the generated DLL was hardly usable (it had a shared initialized
data segment).
e) On OS/2 the generated DLLs had names like ssl.dll. However, DLL names on
OS/2 are "global data". It is hard to have several DLLs with the same
name on the system. Thus this precluded coexistence of OpenSSL with DLLs
for other SLL implementations - or other name clashes. I transparently
changed the names of the DLLs to open_ssl.dll and cryptssl.dll.
f) The file added in (a) is used to create "forwarder" DLLs, so the
applications expecting the "old" DLL names may use the new DLLs
transparently. (A presence of these DLLs on the system nullifies (e),
but makes old applications work. This is a stopgap measure until the
old applications are relinked. Systems with no old applications do not
need these DLLs, so may enjoy all the benefits of (e).)
The new DLLs are placed in os2/ and os2/noname subdirectories.
g) The makefiles created with os2/OS2-EMX.cmd did not work (some mysterious
meaningless failures). The change to util/pl/OS2-EMX.pl uses the
variable introduced in (b) to switch the Makefiles to SHELL=sh syntax.
All these backslashes are removed, and the generated Makefiles started to
work.
h) Running os2/OS2-EMX.cmd now prints out what to do next.
crypto/rijndael. Additionally, I applied the AES integration patch
from Stephen Sprunk <stephen@sprunk.org> and fiddled it to work
properly with the normal EVP constructs (and incidently work the same
way as all other symmetric cipher implementations).
This results in an API that looks a lot like the rest of the OpenSSL
cipher suite.
libdes (which is still used out there) or other des implementations,
the OpenSSL DES functions are renamed to begin with DES_ instead of
des_. Compatibility routines are provided and declared by including
openssl/des_old.h. Those declarations are the same as were in des.h
when the OpenSSL project started, which is exactly how libdes looked
at that time, and hopefully still looks today.
The compatibility functions will be removed in some future release, at
the latest in version 1.0.
1. if there are several symbols with the same entry number, sort those
symbols in ASCII order.
2. Do not stop reading the header files when "BEGIN ERROR CODES" is
found, since mkerr.pl will add a function declaration after that
comment. Instead, trigger on "Error codes for the \w+ function",
which is the actual start of the error code macros.
Additionally, a few more debugging printouts that helped.
like des_read_password and friends (backward compatibility functions
using this new API are provided). The purpose is to remove prompting
functions from the DES code section as well as provide for prompting
through dialog boxes in a window system and the like.
functions on platform were that's the best way to handle exporting
global variables in shared libraries. To enable this functionality,
one must configure with "EXPORT_VAR_AS_FN" or defined the C macro
"OPENSSL_EXPORT_VAR_AS_FUNCTION" in crypto/opensslconf.h (the latter
is normally done by Configure or something similar).
To implement a global variable, use the macro OPENSSL_IMPLEMENT_GLOBAL
in the source file (foo.c) like this:
OPENSSL_IMPLEMENT_GLOBAL(int,foo)=1;
OPENSSL_IMPLEMENT_GLOBAL(double,bar);
To declare a global variable, use the macros OPENSSL_DECLARE_GLOBAL
and OPENSSL_GLOBAL_REF in the header file (foo.h) like this:
OPENSSL_DECLARE_GLOBAL(int,foo);
#define foo OPENSSL_GLOBAL_REF(foo)
OPENSSL_DECLARE_GLOBAL(double,bar);
#define bar OPENSSL_GLOBAL_REF(bar)
The #defines are very important, and therefore so is including the
header file everywere where the defined globals are used.
The macro OPENSSL_EXPORT_VAR_AS_FUNCTION also affects the definition
of ASN.1 items, but that structure is a bt different.
The largest change is in util/mkdef.pl which has been enhanced with
better and easier to understand logic to choose which symbols should
go into the Windows .def files as well as a number of fixes and code
cleanup (among others, algorithm keywords are now sorted
lexicographically to avoid constant rewrites).
form '#if defined(...) || defined(...) || ...' and '#if !defined(...)
&& !defined(...) && ...'. This also avoids the growing number of
special cases it was previously handling (some of them wrongly).
sure they are available in opensslconf.h, by giving them names starting
with "OPENSSL_" to avoid conflicts with other packages and by making
sure e_os2.h will cover all platform-specific cases together with
opensslconf.h.
I've checked fairly well that nothing breaks with this (apart from
external software that will adapt if they have used something like
NO_KRB5), but I can't guarantee it completely, so a review of this
change would be a good thing.
* detect "unknown" algorithms (any C macro starting with NO_ that is
not explicitely mentioned in mkdef.pl as a known algorithm) and
report.
* add a number of algorithms that can be deselected.
* look in ssl/kssl.h as well.
* accept multiple whitespace (not just one SPC) in preprocessor lines.
Win32 but it is getting there...
Update mkdef.pl to handle ASN1_ANY and fix headers.
Stop various VC++ warnings.
Include some fixes from "Peter 'Luna' Runestig"
<peter@runestig.com>
Remove external declaration for des_set_weak_key_flag:
it doesn't exist.
process when some symbols are missing. Instead, all needed info is
saved in the .num files, including what conditions are needed for a
specific symbol to exist.
This was needed for the work I'm doing with shared libraries under
VMS.
existing functions, but really all functions that exist in libeay.num
and ssleay.num. This is a good check on how much we should actually
clean up the number files.
This is mostly a work around for the old VC++ problem
that it treats func() as func(void).
Various prototypes had been added to 'compare' function
pointers that triggered this. This could be fixed by removing
the prototype, adding function pointer casts to every call or
changing the passed function to use the expected arguments.
I mostly did the latter.
The mkdef.pl script was modified to remove the typesafe
functions which no longer exist.
Oh and some functions called OPENSSL_freeLibrary() were
changed back to FreeLibrary(), wonder how that happened :-)
structures and functions for each stack type. The previous behaviour
can be enabled by configuring with the "-DDEBUG_SAFESTACK" option.
This will also cause "make update" (mkdef.pl in particular) to
update the libeay.num and ssleay.num symbol tables with the number of
extra functions DEBUG_SAFESTACK creates.
The way this change works is to accompany each DECLARE_STACK_OF()
macro with a set of "#define"d versions of the sk_##type##_***
functions that ensures all the existing "type-safe" stack calls are
precompiled into the underlying stack calls. The presence or abscence
of the DEBUG_SAFESTACK symbol controls whether this block of
"#define"s or the DECLARE_STACK_OF() macro is taking effect. The
block of "#define"s is in turn generated and maintained by a perl
script (util/mkstack.pl) that encompasses the block with delimiting
C comments. This works in a similar way to the auto-generated error
codes and, like the other such maintenance utilities, is invoked
by the "make update" target.
A long (but mundane) commit will follow this with the results of
"make update" - this will include all the "#define" blocks for
each DECLARE_STACK_OF() statement, along with stripped down
libeay.num and ssleay.num files.
variety of platforms. A few are missing, and they will be added in
eventually, but as this is new stuff, it was better to not break lots of
platforms in one go that we can't easily test. The changes to "Configure"
should illustrate how to add support to other systems if you feel like
having a go.
NB: I'll add something shortly to allow you to add "dlfcn.h" support on
those platforms that don't have (or need) a dlfcn.h header file. (The
symbol for Configure will probably by "dlfcn_no_h").
Thanks to Richard Levitte, who is responsible for the dso_dl.c support,
understanding the trickier aspects of the build process, and giving great
feedback on everything else.
[Don't use this stuff if you're easily offended by changes to the
interface or behaviour - it's still work in progress.]
PR:
