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Delphi import unit for OpenSSL DLL

OpenSSL is a collaborative project to develop an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.
To use OpenSSL software on Microsoft Windows 32 bit systems, you can get DDLs from the GNU Win32 project site.

Borland Delphi and OpenSSL

Delphi can use OpenSSL library invoking DLL.
OpenSSL toolkit is divided in two modules: libssl, implementing SSLv2/v3 and TLS for network communications and libcrypto, that implements cryptography functions.
To use SLv2/v3 and TLS network function with Delphi, you can use components from Indy project.
CSITA has developed a unit to import some function about X.509 certificate.

Required files

Gnu Win32 libeay32.dll
OpenSSL DLL. Present unit has been developed for 0.9.6b version. Version 0.9.6g compiled by Intelicom for Indy project seem to work correctly;
libeay32.pas v. 0.7m
DLL functions prototypes. Not all libeay32.dll functions have a prototype there; all functions that use C-style file pointer are not defined;

What's new in 0.7m version, 05/11/2010 What's new in 0.7d version, 12/15/2006 What's new in 0.7 version, 09/14/2006 What's new in 0.6 version, 07/15/2003 What's new in 0.4 version, 03/17/2003
OpenSSLUtils.pas v. 0.5
Utility functions and classes. This unit is a "technological exercise" and not a production grade component.
New in 0.5 version, 06/01/2010 New examples in 0.3 version, 03/24/2003
Functions documentation are included with OpenSSL distribution.



Any suggestion, contribution and comment are appreciated. You can write to marco@csita.unige.it

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