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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General questions on cryptlib are answered in the cryptlib FAQ. These routines provide an unprecedented level of performance, in most cases running faster than expensive, specialised encryption hardware designed to perform the same task.

To subscribe, send mail to the list administrator with the word “subscribe” in the message body. Because it is thread-safe, lengthy cryptlib operations can be run in the background if required while other processing is performed in the foreground.

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. In addition cryptlib itself is multithreaded so that mxnual intensive internal operations take place in the background without impacting the performance of the calling application. For information on commercial use, there is a cryptlib brochure available in PDF format.

– Objectoriented Delphi interface for Peter Gutman’s Cryptlib library

In addition the technical manual provides a wealth of background information to help users understand the security foundations on which cryptlib is built. You should receive a reply informing you that you’ve been added to the list.

The standardised API allows any of the algorithms and modes supported by cryptlib to be used with a minimum of coding effort. Peter Gutman ‘s Cryptlib binaries version 3.


And you know, if you download the source, you do it on your own risk. You can also get the documentation in Windows help format conversion performed by David Kelvin. All standard error handling from cryptlib is done via Exception handling in Delphi.


You may use the “F1”-key when editing your source to popup online help on any DelphiCryptlib object, ,anual or property. For details of the implementation have a cryplib into the interface part of the DelphiCryptlib. This is to allow a central consistent version to be maintained. This is to stop people adding their own wrappers and selling crryptlib as “their” encryption product. Please report problems and errors to problems cryptlib. Exact terms are given at the bottom of this page.

Delphi interface file generated from cryptlib. Please use this with the latest CL 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. If you make any changes to the code, you should send a copy of the changes to the author to allow them to cryotlib integrated into the code.

Wolfgang Gothier has a web page with Visual Basic manul Delphi add-ons for crhptlib that provide more VB- and Delphi-like interfaces than the standard one, as well as sample code in VB and Delphi. 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.

This interface is more “Delphi-like” than cryptlib. The user manual concludes with a reference section covering the various cryptlib API functions, constants, and data types. This allows cryptlib to be used crgptlib freeware and shareware applications, for evaluation and research purposes, and for non-revenue-generating or personal use without charge.

You don’t have to check the return codes after every cryptlib call. The user manual is intended for everyday cryptlib use and contains detailed documentation on every aspect of cryptlib’s functionality.

Before working with it, you should read at least the Installation section of the manual, which covers details on installing the software on different platforms under Unix you need to unzip with the -a option.


In addition, cryptlib is free for use in low-cost, non-open-source applications such as shareware, and for personal and research use. In addition the easy-to-use nanual routines allow for the exchange of encrypted or signed messages or the establishment of secure communications channels with a minimum of programming overhead. A good overview and background behind the Sleepycat licensewhich also applies for cryptlib, is also available.

Most of the core algorithms used in cryptlib have manhal implemented in assembly language in order to provide the maximum possible performance, and will take advantage of crypto cryprlib acceleration facilities present in some CPUs such as the Via C3 family. Peter Gutman ‘s Cryptlib version 3. Anyone who has a support contract for cryptlib version 3.

The essential objects defined in DelphiCryptlib. 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. Note that decoupling the software from the user, for example by running in a SaaS configuration, does not exempt you from these requirements. In addition the author reserves the right to grant free licenses for commercial use in special cases for example where there is a general benefit to the publiccontact the author for details if you think you qualify.

Peter Gutman ‘s cryptlib manual for version 3. If you’re unable to comply with the above license then the following, alternate usage conditions apply:. Any large-scale commercial use of cryptlib requires a license. There is a very low volume mailing list available that covers cryptlib development and usage and implementation details. Anyone without a support contract will no longer be able to receive support for 3.

In addition logical errors such as, for example, a key exchange function being called in the wrong sequence, are checked for and identified. Look for sample code showing how to use Cryptlib.