Possibly another way to get username and password: If database and "secret" C++ code run or can run on different machines, connect both machines with a hub (or a managed switch with a "monitor" port), connect a third machine running wireshark, trace packages send from the client to the database. My guess is that the database does not encrypt communication, at least not by default. Probably, wireshark knows the database protocol. In the best case, username and password are send in plain text over the wire.

Alexander

Hum the thing is getting old but by the way I've to need the right to access it:

cpan> install DBD::Oracle
CPAN::SQLite not installed, trying to work without
Reading 'C:\STRAWB~1\cpan\Metadata'
  Database was generated on Sun, 01 Jan 2023 22:54:07 GMT
Running install for module 'DBD::Oracle'
Fetching with LWP:
http://cpan.strawberryperl.com/authors/id/Z/ZA/ZARQUON/DBD-Oracle-1.83
+.tar.gz
LWP failed with code[501] message[Can't load 'C:\xampp\perl\vendor\lib
+/auto/Net/SSLeay/SSLeay.xs.dll' for module Net::SSLeay: load_file:Le 
+module spÚcifiÚ est introuvable (LWP::Protocol::https not installed)]
Warning: no success downloading 'C:\STRAWB~1\cpan\sources\authors\id\Z
+\ZA\ZARQUON\DBD-Oracle-1.83.tar.gz.tmp4192'. Giving up on it.
Fetching with LWP:
http://www.cpan.org/authors/id/Z/ZA/ZARQUON/DBD-Oracle-1.83.tar.gz
Fetching with LWP:
http://www.cpan.org/authors/id/Z/ZA/ZARQUON/CHECKSUMS
Checksum for C:\STRAWB~1\cpan\sources\authors\id\Z\ZA\ZARQUON\DBD-Orac
+le-1.83.tar.gz ok
Scanning cache C:\STRAWB~1\cpan\build for sizes
......................................................................
+......DONE
Configuring Z/ZA/ZARQUON/DBD-Oracle-1.83.tar.gz with Makefile.PL
Can't locate DBI.pm in @INC (you may need to install the DBI module) (
+@INC contains: C:/xampp/perl/site/lib C:/xampp/perl/vendor/lib C:/xam
+pp/perl/lib .) at Makefile.PL line 20.
BEGIN failed--compilation aborted at Makefile.PL line 20.
Warning: No success on command[C:\xampp\perl\bin\perl.exe Makefile.PL]
  ZARQUON/DBD-Oracle-1.83.tar.gz
  C:\xampp\perl\bin\perl.exe Makefile.PL -- NOT OK
Stopping: 'install' failed for 'DBD::Oracle'.
Failed during this command:
 ZARQUON/DBD-Oracle-1.83.tar.gz               : writemakefile NO 'C:\x
+ampp\perl\bin\perl.exe Makefile.PL' returned status 512

cpan>
[download]

The error message contains (LWP::Protocol::https not installed) - most likely, you don't have that module installed. This is weird since Strawberry Perl usually contains it, and also contains SSLeay.xs.dll.

How did you install Strawberry Perl? Is there such a file SSLeay.xs.dll on your harddisk somewhere?