The technical reference manual covers the design and internals of cryptlib itself. cryptlib features 11 Performance cryptlib is re-entrant and completely thread-safe . This interface is more “Delphi-like” than , which is “C-like”. for DelphiCryptlib, but you should have read Peter Gutman’s cryptlib manual before. The cryptlib manual [23, page 35] states that the programmer is required to check that each function returns CRYPT_OK, and that the wrong code shown above.

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The GPL-compatible license a. And you know, if you download the source, you do it on your own risk.

In addition logical errors such as, for example, a key exchange function being called in the wrong sequence, are checked for and identified. You may use the “F1”-key when editing your source to popup online help on any DelphiCryptlib object, method or property.

Most of the core algorithms used in cryptlib have been implemented in assembly language in order to provide the maximum possible performance, and will take advantage of crypto hardware acceleration facilities present in some CPUs such as the Via C3 family. In addition cryptlkb author reserves the right to grant free licenses for commercial use in special cases for example where there maanual a general benefit to the publiccontact the author for details if you think you ctyptlib.

Wolfgang Gothier has a web page with Visual Basic and Delphi add-ons for cryptlib that provide more VB- and Delphi-like interfaces than the standard one, as well as sample code in VB and Delphi. DelphiCryptlib is an objectoriented wrapper for the functions cryptllb in cryptlib.

If you’re unable to comply with the above license then the following, alternate usage conditions apply:. You don’t have to check the return codes after every cryptlib call. Cfyptlib addition, cryptlib is free for ceyptlib in low-cost, non-open-source applications such crypptlib shareware, and for personal and research use.

These routines provide an unprecedented level of performance, in most cases running faster than expensive, specialised encryption hardware designed to perform the same task. For information on commercial use, there is a cryptlib brochure available in PDF format. Peter Gutman ‘s Cryptlib binaries version 3. Because it is thread-safe, lengthy cryptlib operations can be run in the background if required while other processing is performed in the foreground.


In addition cryptlib itself is cruptlib so that computationally intensive internal operations take place in the background without impacting the performance of the calling application.

Note that decoupling the software from the user, for example by running in a SaaS configuration, does not exempt you from these requirements. Any software you create with this code may not be merely a set or subset of cryptlib, with or without minor added functionality or a different interface. Most cryptlib attributes are defined as properties in DelphiCryptlib.

Delphi interface file generated from cryptlib. An archive of older mailing-list postings is also available.

Peter Gutman ‘s Cryptlib version 3. Peter Gutman ‘s cryptlib manual for version 3. This is to stop people adding their own wrappers and selling it as “their” encryption product.

– Objectoriented Delphi interface for Peter Gutman’s Cryptlib library

A good overview and background behind the Sleepycat licensewhich also applies for cryptlib, is also available. The user manual concludes with a reference section covering the various cryptlib API functions, constants, and cryltlib types. This interface is more “Delphi-like” than cryptlib.

This allows cryptlib to be used in freeware and shareware applications, for evaluation and research purposes, and for non-revenue-generating or personal use without charge. The standardised API allows any of the algorithms and modes supported by cryptlib to be used with a minimum of coding effort.

In particular you can’t distribute cryptlib or any modified form of it as your own encryption product. In addition the easy-to-use high-level routines allow for the exchange of encrypted or signed messages or the establishment of secure communications channels with a minimum of programming overhead.

The current cryptlib release is cryptlib 3.

Look for sample code showing how to use Cryptlib. You can also get the documentation in Windows help format conversion performed by David Kelvin. Please use this with the latest CL Before working with it, you should read at least the Installation cdyptlib of the manual, which covers details on installing the software on different platforms under Unix you need to unzip with the -a option.


The technical reference manual covers the design and internals of cryptlib itself, including the cryptlib security model and security mechanisms that protect every part of cryptlib. Any large-scale ,anual use of cryptlib requires a license.

General questions on cryptlib are answered in the cryptlib FAQ. This is to allow a central consistent version to be maintained. Exact terms are given at the bottom of this page. All standard error handling from cryptlib is done via Exception handling in Delphi.

To subscribe, send mail to the list administrator with the word “subscribe” in the message body. If you make any changes to the code, you should send a copy of the changes to the author to allow them to be integrated into the code. On initialisation it performs extensive self-testing against test data from encryption standards documents, and the APIs check each parameter and function call for errors before any actions are performed, with error reporting down to the level of individual parameters.


The user manual is intended for everyday cryptlib use and contains detailed documentation on every aspect of cryptlib’s functionality. There is a very low volume mailing list available that covers cryptlib development and usage and implementation details.

The application programming interface API serves as an interface to a range of plug-in encryption modules that allow encryption algorithms to be added in a fairly transparent manner, so that adding a new algorithm or replacing an existing software implementation with custom encryption hardware can be done without any trouble.

I can’t give you any support and any warranties are explicitly disclaimed. If Cert is a TCryptCert variable, you may use:. In most cases the code needed to secure an application can be cut and pasted directly from the appropriate section of the manual, avoiding the need to learn yet another programming API.