dder, a portable der-encoded file display program
=================================================
Date: 2016-01-05 22:07 +0100
Contents:
I. WHAT IS DDER?
II. WHY DDER?
III. LICENCE
IV. COMPILATION AND INSTALLATION
I. WHAT IS DDER?
It is a minimalistic program to display the content of DER (Distinguished
Encoding Rules) encoded files.
See URL
https://en.wikipedia.org/wiki/X.690#DER_encoding
for details about DER encoding.
II. WHY DDER?
It displays der content in a very detailed way. It is meant to be didactic.
The command
openssl asn1parse
does a perfect job but without displaying the low level file content (and it
is not its job to do that.)
dder displays der content with low level file content in hexadecimal.
III. LICENCE
See COPYING file that comes along with the package the program belongs to.
IV. COMPILATION AND INSTALLATION
By default the generation is done with linking against openssl library.
This allows dder to display the object names after their OID.
Under Linux the link is dynamic, under Windows it is static.
* LINUX
To compile under Linux, execute in the extracted archive root:
./configure
make
make install (or 'sudo make install')
Note about SSL
The SSL feature requires SSL development library to be available on the
system you compile on. The package name is libssl-dev for DEB packages and
openssl-devel (not tested) in RPM ones. For example under Ubuntu, execute:
sudo apt-get install libssl-dev
* WINDOWS
1) Generation with Microsoft Visual C++
This generation was checked with msvc version 2015, 32-bit compilation.
1.1) Compilation of the openssl library with msvc
See
http://developer.covenanteyes.com/building-openssl-for-visual-studio/
As compilation is done from MSVC command-line shell, you need a PERL
interpreter installed on Windows to proceed.
ActiveState or Strawberry are fine while ActiveState is said by the URL above
to be more stable.
From msvc command-line and after CDing to the extracted openssl archive, run
(for 32-bit)
perl Configure VC-WIN32 --prefix=C:\openssl-msvc
or (for 64-bit)
perl Configure VC-WIN64 --prefix=C:\openssl-msvc
Then
ms\do_ms (for 32-bit) or ms\do_win64a (for 64-bit)
Then
nmake -f ms\nt.mak
nmake -f ms\nt.mak install
1.2) dder.exe generation
To compile under Windows with Microsoft Visual C++ 2015, launch MSVC
command-line and, in the extracted archive root, execute:
nmake -f makefile.vc
You may need to update makefile.vc depending on where you built openssl lib
in.
2) Generation with Mingw
This generation was checked using Mingw 32-bit.
2.1) Compiling the openssl library with mingw
To build a static version of openssl with mingw, see the following URLs:
http://stackoverflow.com/questions/9379363/how-to-build-openssl-with-mingw-in-windows
http://www.wagner.pp.ru/~vitus/articles/openssl-mingw.html
http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-February/001644.html
Instructions:
1. Download the source from there and extract it:
http://www.openssl.org/source/openssl-1.0.2e.tar.gz
(select the last version ; as of January 5th, 2016, it is 1.0.2e)
2. Open a MSYS window (from MinGW\msys\1.0\msys.bat)
3. Run the command (32 bits)
perl Configure mingw no-shared no-asm --prefix=/c/openssl
Or (64 bits)
perl Configure mingw64 no-shared no-asm --prefix=/c/openssl-x64
4. Run
make
make install
5. Under the directory you built openssl in, you will find the libraries, example:
C:\openssl\lib\libcrypto.a
2.2) dder.exe generation
To compile under Windows with mingw, in the extracted archive root, execute:
mingw32-make -f makefile.mingw
You may need to update makefile.mingw depending on where you built openssl lib
in.
Sébastien Millet, February 2015-January 2016