Description:

Crypto++ Library is a public domain C++ class library of cryptographic
schemes. Currently the library consists of the following features:

* a class hierarchy with an API defined by abstract base classes
* AES(Rijndael) and AES candidates: RC6, MARS, Twofish, Serpent,
CAST-256
* other symmetric block ciphers: IDEA, DES, Triple-DES (DES-EDE2
and DES-EDE3), DESX (DES-XEX3), RC2, RC5, Blowfish, TEA, XTEA,
SAFER, 3-WAY, GOST, SHARK, CAST-128, Square, Skipjack, Camellia,
SHACAL-2
* generic block cipher modes: ECB, CBC, CBC ciphertext stealing
(CTS), CFB, OFB, counter mode (CTR)
* stream ciphers: Salsa20, Panama, ARC4, SEAL, WAKE, WAKE-OFB,
BlumBlumShub
* public-key cryptography: RSA, DSA, ElGamal, Nyberg-Rueppel (NR),
Rabin, Rabin-Williams (RW), LUC, LUCELG, DLIES (variants of
DHAES), ESIGN
* padding schemes for public-key systems: PKCS#1 v2.0, OAEP, PSS,
PSSR, IEEE P1363 EMSA2 and EMSA5
* key agreement schemes: Diffie-Hellman (DH), Unified
Diffie-Hellman (DH2), Menezes-Qu-Vanstone (MQV), LUCDIF, XTR-DH
* elliptic curve cryptography: ECDSA, ECNR, ECIES, ECDH, ECMQV
* one-way hash functions: SHA-1, MD2, MD4, MD5, HAVAL, RIPEMD-128,
RIPEMD-256, RIPEMD-160, RIPEMD-320, Tiger, SHA-2 (SHA-224,
SHA-256, SHA-384, and SHA-512), Panama, WHIRLPOOL
* message authentication codes: MD5-MAC, HMAC, XOR-MAC, CBC-MAC,
DMAC, Two-Track-MAC
* cipher constructions based on hash functions: Luby-Rackoff, MDC
* pseudo random number generators (PRNG): ANSI X9.17 appendix C,
PGP's RandPool
* password based key derivation functions: PBKDF1 and PBKDF2 from
PKCS #5
* Shamir's secret sharing scheme and Rabin's information dispersal
algorithm (IDA)
* DEFLATE (RFC 1951) compression/decompression with gzip (RFC
1952) and zlib (RFC 1950) format support
* fast multi-precision integer (bignum) and polynomial operations,
with SSE2 optimizations for Pentium 4 processors, and support for
64-bit CPUs
* finite field arithmetics, including GF(p) and GF(2^n)
* prime number generation and verification
* various miscellaneous modules such as base 64 coding and 32-bit
CRC
* class wrappers for these operating system features (optional):
o high resolution timers on Windows, Unix, and MacOS
o Berkeley and Windows style sockets
o Windows named pipes
o /dev/random, /dev/urandom, /dev/srandom
o Microsoft's CryptGenRandom on Windows
* A high level interface for most of the above, using a
filter/pipeline metaphor
* benchmarks and validation testing
* FIPS 140-2 Validated

Because one purpose of the project is to act as a repository of public
domain (not copyrighted) cryptographic source code, the code in
Crypto++ was either written specifically for this project by its
contributors and placed in the public domain, or derived from other
sources that are public domain (again with the exception of mars.cpp).