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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In addition the technical manual provides a wealth of background information to help users understand the security foundations on which cryptlib is built. Look for sample code showing how to use Cryptlib. Any large-scale commercial use of cryptlib requires a license. There is a very low mxnual mailing list available that covers cryptlib development and usage and implementation details. Delphi interface file generated from cryptlib. The user manual is intended for everyday cryptlib use cruptlib contains detailed documentation on every aspect of cryptlib’s functionality.

You can also get the documentation in Windows help format conversion performed by David Kelvin. You don’t have manuao check the return codes after every cryptlib call. You should receive a reply informing you that you’ve been added to the list.

Please use this with the latest CL In cryptlub cryptlib itself is multithreaded so that computationally intensive internal operations take place in the background without impacting the performance of the calling application.

Peter Gutman ‘s Cryptlib binaries version 3. For details of the implementation have a look into the interface part of the DelphiCryptlib. 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.

– Objectoriented Delphi interface for Peter Gutman’s Cryptlib library

Any software you create xryptlib this code may not be merely a set or subset of cryptlib, with or without minor added functionality or a different interface. The application manuall 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.


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. 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 logical errors such as, for example, a cryptlibb exchange function being called in the wrong sequence, are checked for and mahual. If you make any changes to the code, you should amnual a copy of the changes to the author to allow them to be integrated into the code.

Please report problems and errors to problems cryptlib. DelphiCryptlib is an objectoriented wrapper for the functions defined in cryptlib. A good overview and background behind the Sleepycat licensewhich also applies for cryptlib, is also available. 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.

The essential objects defined in DelphiCryptlib. In particular you can’t distribute cryptlib or any modified form of it as your own encryption product.

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. This is to allow a central consistent version to be maintained.


Because it is thread-safe, lengthy cryptlib operations can be run in the background if required while other processing is performed cryptliib the foreground.

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. You may use the “F1”-key when editing your source to popup online help on any DelphiCryptlib object, method or property.

And you know, if you download the source, you do it on your own risk. An archive of older mailing-list postings is also available. General questions on cryptlib are answered in the cryptlib FAQ. In addition, cryptlib is free for use in low-cost, non-open-source applications such as shareware, and for personal and research use. The GPL-compatible license a.

To subscribe, send mail to the list administrator with the word “subscribe” in the message body. If Cert is a TCryptCert variable, you may use:. For information on commercial use, there is a cryptlib brochure available crgptlib PDF format. Note that decoupling the software from the user, for example by running in a SaaS configuration, does not exempt manuxl from these requirements.

The standardised API allows any of the algorithms and modes supported by cryptlib to be used with a minimum of coding effort. Anyone without a support contract will no longer be able to receive support for 3.

Peter Gutman ‘s Cryptlib version 3.

Peter Gutman ‘s cryptlib manual for version 3. Anyone who has a support contract for cryptlib version 3.