Description:

Crypto++ Library is a public domain C++ class library of cryptographic
schemes. Currently the library consists of the following, some of which
are other people's code, repackaged into classes.

* 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, Diamond2, TEA, SAFER,
3-WAY, GOST, SHARK, CAST-128, Square, Skipjack
* generic cipher modes: ECB, CBC, CBC ciphertext stealing (CTS), CFB,
OFB, counter mode (CTR)
* stream ciphers: 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, PSSR,
IEEE P1363 EMSA2
* 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-160, Tiger,
SHA-2 (SHA-256, SHA-384, and SHA-512), Panama
* message authentication codes: MD5-MAC, HMAC, XOR-MAC, CBC-MAC, DMAC
* 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
* 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 and /dev/urandom on Linux and FreeBSD
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

One purpose of Crypto++ is to act as a repository of public domain
(not copyrighted) source code. Although the library is copyrighted as a
compilation, the individual files in it (except for a few exceptions listed in
the license) are in the public domain.