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John the Ripper is a fast password cracker, currently available for many flavors of Unix (eleven are officially supported, not counting different architectures), DOS, Win32, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix flavors, supported out of the box are Kerberos AFS and Windows NT/2000/XP/2003 LM hashes, plus several more with contributed patches (over 40 of additional hash and cipher types).

BSDsfv is a flexible and highly compatible SFV checksum utility. Features: - create SFV files, verify downloaded single files or whole releases - add banners to your SFV files - very flexible and compatible with all other SFV tools currently known, including SFVNIX compatibility mode concerning SFV files created - easy to console application - plug & play support for glFTPd and other demons including count-missing-files feature for race scripts

The SHA module allows you to use the NIST SHA message digest algorithm from within Perl programs. The final message digest value is returned by the digest operation as a 20-byte binary string. This operation delivers the result of operations since the last new or reset operation. Once the operation has been performed, the context must be reset before being used to calculate another digest value.

M2Crypto is the most complete Python wrapper for OpenSSL featuring RSA, DSA, DH, HMACs, message digests, symmetric ciphers (including AES); SSL functionality to implement clients and servers; HTTPS extensions to Python's httplib, urllib, and xmlrpclib; unforgeable HMAC'ing AuthCookies for web session management; FTP/TLS client and server; S/MIME; ZServerSSL: A HTTPS server for Zope and ZSmime: An S/MIME messenger for Zope.

Duo provides simple two-factor authentication as a service via: 1. Phone callback 2. SMS-delivered one-time passcodes 3. Duo mobile app to generate one-time passcodes 4. Duo mobile app for smartphone push authentication 5. Duo hardware token to generate one-time passcodes This package allows an admin (or ordinary user) to quickly add Duo authentication to any Unix login without setting up secondary user accounts, directory synchronization, servers, or hardware.

This is a small command-line utility for encryption and decryption using the principle of one-time pads (OTPs). One or more data files given to pad are XORd with each other and with RNG output, resulting in two or more output files. The output files are indistinguishable from random noise, except that when the pad utility is used to XOR them together again, the original data files may be recovered. Jason Harris <jharris@widomaker.com>

Not all web applications are built in the same ways, and hence, many must be analyzed individually. SPIKE Proxy is a professional-grade tool for looking for application-level vulnerabilities in web applications. SPIKE Proxy covers the basics, such as SQL Injection and cross-site-scripting, but it's completely open Python infrastructure allows advanced users to customize it for web applications that other tools fall apart on.

This library is used to gain direct access to the functions exposed by Daniel J. Bernstein's nacl library via libsodium or tweetnacl. It has been constructed to maintain extensive documentation on how to use nacl as well as being completely portable. The file in libnacl/__init__.py can be pulled out and placed directly in any project to give a single file binding to all of nacl.

"... sslwrap is a simple Unix service that sits over any simple TCP service such as POP3, IMAP, SMTP, and encrypts all of the data on the connection using TLS/SSL. It uses ssleay to support SSL version 2 and 3. It can run out of inetd. It can also encrypt data for services located on another computer. It works with the servers you already have, and does not require any modifications to your existing servers. ..." Of course, it works with OpenSSL, too.

The Apache-XML-Security-J supports XML-Signature Syntax and Processing, W3C Recommendation 12 February 2002 and XML Encryption Syntax and Processing, W3C Recommendation 10 December 2002. The Java library supports the standard Java API JSR-105: XML Digital Signature APIs for creating and validating XML Signatures. A standard Java API for XML Encryption JSR-106: XML Digital Encryption APIs is in progress and is not final, so this API is not yet supported.