Programming Libraries

Applied Cryptography Code
The code from the Applied Cryptography disk, available outside the US.
ftp://ftp.zedz.net/pub/crypto/applied-crypto/

Botan
An open-source C++ crypto library that includes block and stream ciphers, hash functions, MACs, and public key algorithms, along with an easy to use filter-based interface.
http://botan.randombit.net/

BSAFEeay
A free, public domain implementation of RSA Data Security's BSAFE API, using the SSLeay crypto library.
https://www.cypherpunks.to/bsafeeay/

CTC
CTClib (PGP-interoperable ANSI C encryption software library) and CTCjava (Java crypto components and application).
http://www.bifroest.demon.co.uk/ctc/

DevOTechS: Huge Integer Math and Encryption Library (HIME)
A dll for implementing public and secret key encryption using RSA, AES, SHA-256. Also contains functions for prime number generation, random number generation and huge integer operations.
http://www.devotechs.com/

Emacs Cryptographic Library and Tools
Includes code for IDEA, Blowfish, SHA-1, MD5, RC16 (RC4 extension), an initial implementation of DES and a few related toys.
http://web.mit.edu/thouis/www/ecrypto.html

Entrust Dev-Net
A variety of tools to add PKI functionality to your application.
http://www.entrust.com/pki/toolkits.htm

FastCRC Library
Optimized implementation of CRC32, CRC16 and CRC16C (CRC-CCITT) checksum algorithms. With examples in C/C++ and Visual Basic.
http://www.slavasoft.com/fastcrc/

Hidden Field Equations (HFE) in Java
A free implementation of the public key cryptography system with source code and documentation.
http://www.christopher-wolf.de/hfe/

JavaScript Encryption Program
Open source JavaScript implementation of the MD5 hash and RC4, AES, CSR and RSA ciphers.
http://home.versatel.nl/MAvanEverdingen/Code/

libmcrypt
Supports the following algorithms; BLOWFISH, TWOFISH, DES, TripleDES, 3-WAY, SAFER-sk64, SAFER-sk128, SAFER+, LOKI97, GOST, RC2, RC6, MARS, IDEA, RIJNDAEL-128 (AES), RIJNDAEL-192, RIJNDAEL-256, SERPENT, CAST-128, CAST-256, ARCFOUR and WAKE. ANSI C.
http://mcrypt.hellug.gr/#_libmcrypt

MD5 Homepage (unofficial)
Information and implementation in various languages.
http://userpages.umbc.edu/~mabzug1/cs/md5/md5.html

Network Security Services
Mozilla's NSS, is a set of libraries designed to support cross-platform development of security-enabled server applications.
http://www.mozilla.org/projects/security/pki/nss/

OpenSSL
A collaborative effort to develop a robust, commercial-grade, full-featured, and 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.
http://www.openssl.org/

Punkroy and the Cypher Project
Collection of programming examples on encryption including: file encryption, steganography in images and sound, data base record encryption, and password verification. All written in Pascal, all source code available.
http://Punkroy.DrQue.net/Programs.html

Python Cryptography Toolkit
A collection of cryptographic algorithms and protocols, implemented for use from Python.
http://www.amk.ca/python/code/crypto

QuartzLight in Java
Implements the public key signature system QuartzLight in Java where QuartzLight refers to a research version of the Quartz standard.
http://www.christopher-wolf.de/ql/

RC-Crypt
Implementation of RC5 (128) in C.
http://www.ricksoft.co.uk/downloads/rccrypt/rccrypt.htm

RSA MD5 Visual C++
An implementation of the message digest algorithm. Includes a performance measurement facility.
http://www.langfine.com/rsa_md5.htm

SlavaSoft QuickHash Library
Add hash (MD2, MD5, SHA-1, SHA-2, RIPEMD-160, PANAMA, TIGER), checksum (CRC32, ADLER32) and HMAC (HMAC-MD5, HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, HMAC-SHA512, HMAC-RIPEMD160, HMAC-PANAMA, HMAC-TIGER) calculations to your Windows apps quickly and easily. C++, commercial.
http://www.slavasoft.com/quickhash/

Snapcrypt - Cryptography Algorithms
A library for the TMS320C54x DSP, includes algorithms for symmetric block ciphers, one-way hash functions, public key encryption and digital signature.
http://www.snapshield.com/Products_licensing_fs.html

SoftaCrypt
Java based implementation libraries for encryption and hash algorithms.
http://www.softabar.com/home/content/view/44/65/

The source code of the 128-bit PC1 cipher algorithm
In C, Delphi, Java, Perl and Visual Basic.
http://membres.lycos.fr/pc1/

SSL++ -- C++ Wrapper arround OpenSSL library
SSL++ is simple C++ library encapsulating OpenSSL functionality to make it simple and easily accessible to C++ programmers.
http://www.total-knowledge.com/progs/sslpp/

Sysepub
An open-source Java cipher that combines one time pad with public and private keys.
http://teutoburgo.web44.net/java/sysepub.html