Crypto++: a C++ Class Library of Cryptographic Primitives
Version 2.2  5/2/1997

This library includes:

MD5, SHA, HAVAL, Tiger, RIPE-MD160, MD5-MAC, HMAC, XOR-MAC, DES, IDEA, 
WAKE, 3-WAY, TEA, SAFER, Blowfish, SHARK, GOST, CAST-128, Square, Diamond2,
Sapphire, RC5, SEAL, Luby-Rackoff, MDC, various encryption modes (CFB,
CBC, OFB, counter), DH, DSA, ElGamal, LUC, LUCDIF, LUCELG, Rabin, RSA,
BlumGoldwasser, elliptic curve cryptosystems, BBS, DEFLATE compression, 
Shamir's secret sharing scheme, Rabin's information dispersal scheme.
There are also various miscellanous modules such as base 64 coding and
32-bit CRC.

You are welcome to use it for any purpose without paying me, but see
license.txt for the fine print.

Crypto++ has been compiled and tested with MSVC 5.0 on Windows NT 4.0.
Unfortunately some of the C++ features used by Crypto++ 2.2 are not
yet supported by all compilers.  If you have trouble compiling it,
check the Crypto++ homepage (see below) for possible workarounds.  You
may also have better luck with older versions of Crypto++.

To compile and test Crypto++, add all of the .cpp files into a console
application project and make the test driver.  To use the library in
your application, you can either add individual Crypto++ modules into
your application project, or compile Crypto++ into a library and link
with the library.

Right now there is very little documentation for Crypto++.  If you are
not familiar with cryptography, I suggest that you read an introductory
text (such as Bruce Schneier's _Applied Cryptography_) before attempting
to use this library.  Otherwise, you should start by looking at
cryptlib.h, which contains the main abstract base classes and their
descriptions, and test.cpp, which contains sample/test code.  

Finally, a note on object ownership:  If a constructor for A takes 
a pointer to an object B (except primitive types such as int and char),
then A owns B and will delete B at A's destruction.  If a constructor 
for A takes a reference to an object B, then the caller retains ownership 
of B and should not destroy it until A no longer needs it.

Good luck, and feel free to e-mail me at weidai@eskimo.com if you have
any problems.  Also, check http://www.eskimo.com/~weidai/cryptlib.html
for updates and new versions.

Wei Dai

History

1.0 - First public release.  Withdrawn at the request of RSA DSI.
    - included Blowfish, BBS, DES, DH, Diamond, DSA, ElGamal, IDEA,
      MD5, RC4, RC5, RSA, SHA, WAKE, secret sharing, DEFLATE compression
    - had a big bug in the RSA key generation code.

1.1 - Removed RSA, RC4, RC5
    - Disabled calls to RSAREF's non-public functions
    - Minor bugs fixed

2.0 - a completely new, faster multiprecision integer class
    - added MD5-MAC, HAVAL, 3-WAY, TEA, SAFER, LUC, Rabin, BlumGoldwasser,
      elliptic curve algorithms
    - added the Lucas strong probable primality test
    - ElGamal encryption and signature schemes modified to avoid weaknesses
    - Diamond changed to Diamond2 because of key schedule weakness
    - fixed bug in WAKE key setup
    - SHS class renamed to SHA
    - lots of miscellaneous optimizations

2.1 - added Tiger, HMAC, GOST, RIPE-MD160, LUCELG, LUCDIF, XOR-MAC,
      OAEP, PSSR, SHARK
    - added precomputation to DH, ElGamal, DSA, and elliptic curve algorithms
	- added back RC5 and a new RSA
    - optimizations in elliptic curves over GF(p)
    - changed Rabin to use OAEP and PSSR
    - changed many classes to allow copy constructors to work correctly
    - improved exception generation and handling

2.2 - added SEAL, CAST-128, Square
    - fixed bug in HAVAL (padding problem)
    - fixed bug in triple-DES (decryption order was reversed)
    - fixed bug in RC5 (couldn't handle key length not a multiple of 4)
    - changed HMAC to conform to RFC-2104 (which is not compatible
      with the original HMAC)
    - changed secret sharing and information dispersal to use GF(2^32)
      instead of GF(65521)
    - removed zero knowledge prover/verifier for graph isomorphism
    - removed several utility classes in favor of the C++ standard library
