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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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 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. This interface is more manuao than cryptlib. If you’re unable to comply with the above license then crtptlib following, alternate usage conditions apply:.

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. I can’t give you any support and any warranties are explicitly disclaimed. Look for sample code showing how to use Cryptlib. Any software you create with this code may not be merely a set or subset of cryptlib, with or without minor manuual functionality or a different interface.

For information on commercial use, there is a cryptlib brochure available in PDF format.

Most of the core algorithms used in cryptlib have been crypltib 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. Delphi interface file generated from cryptlib. A Helpfile is available for DelphiCryptlib, but you should have read Peter Gutman’s cryptlib manual before. Any large-scale commercial use of cryptlib requires a license.

The current cryptlib release is cryptlib 3. In addition, cryptlib is free for use in low-cost, non-open-source applications such as shareware, and for personal and research use. To subscribe, send mail to the list administrator with the word “subscribe” in the message body. 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.


You should receive a reply informing you that you’ve been added to the list. The application programming interface API serves as an manuall 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.

Peter Gutman ‘s cryptlib manual for 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. Anyone without a support contract will no longer be able to receive support for 3. Please report problems and errors to problems cryptlib.

This is to stop people adding their own wrappers manaul selling it as “their” encryption product. DelphiCryptlib is an objectoriented wrapper for the functions defined in cryptlib.

The essential objects defined in DelphiCryptlib. You can also get the documentation in Windows help format conversion performed by David Kelvin. Anyone who has a support contract for cryptlib version 3.

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.

An archive of older mailing-list postings is also available.

You don’t have to check the return codes after every cryptlib call. Janual good overview and background behind the Cryptlibb licensewhich also applies for cryptlib, is also available.

This is to allow a central consistent version to be maintained. The standardised API allows any of the algorithms and modes supported by cryptlib to be used with a minimum of coding effort. The GPL-compatible license a. There is a very low volume mailing list available that covers cryptlib development and usage and implementation details. Peter Gutman ‘s Cryptlib binaries version 3.

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

– Objectoriented Delphi interface for Peter Gutman’s Cryptlib library

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 be integrated into the code.


Peter Gutman ‘s Cryptlib version 3. 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.

All standard error handling from cryptlib is done via Exception handling in Delphi. If Cert is a TCryptCert variable, you may use:.


The user manual concludes with a reference section covering the various cryptlib API functions, constants, and data types. For details of the implementation have a look into the cryptlin part of the DelphiCryptlib. In addition logical errors such as, for example, a key exchange function being called in the wrong sequence, are checked for and identified. Please use this with the latest CL Most cryptlib attributes are defined as properties in DelphiCryptlib.

The user manual is intended for everyday cryptlib use and contains detailed documentation on every aspect of cryptlib’s functionality. In addition cryptlib itself is multithreaded so that computationally intensive internal operations take place in the background without impacting the performance of the calling application. 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 particular you can’t distribute cryptlib or any modified form of it as your own encryption product. In addition the technical manual provides a wealth of mamual information to help users understand the security foundations on which cryptlib is built. You may use the “F1”-key when editing your source to popup online help on any DelphiCryptlib object, method or property.

General questions on cryptlib are answered in the cryptlib FAQ.