Crypto++ is library for creating c++ programs which use cryptographic algorithms. the library uses a pipes & filters architecture with heavy use of templates and abstract base classes. the cryptographic tools include:
* authenticated encryption schemes (gcm, ccm, eax),
* high speed stream ciphers (panama, sosemanuk, salsa20, xsalsa20),
* aes and candidates (rijndael, rc6, mars, twofish, serpent, cast-256),
* other symmetric block ciphers (idea, triple-des, camellia, seed,
rc5, blowfish, tea, xtea, skipjack, shacal-2),
* block cipher modes of operation (ecb, cbc, cts, cfb, ofb, ctr),
* message authentication codes (vmac, hmac, cmac, cbc-mac, dmac,
two-track-mac),
* hash functions (sha-1, sha-224, sha-256, sha-384, sha-512, tiger,
whirlpool, ripemd-128, ripemd-256, ripemd-160, ripemd-320),
* public-key cryptography (rsa, dsa, elgamal, nr, rw, luc, lucelg,
dlies, esign),
* padding schemes for public-key systems (pkcs#1, oaep, pss, pssr,
emsa2, emsa5),
* key agreement schemes (dh, mqv, lucdif, xtr-dh),
* elliptic curve cryptography (ecdsa, ecnr, ecies, ecdh, ecmqv),
* backwards compatibility algorithms (md2, md4, md5, panama hash, des,
arc4, seal 3.0, wake, wake-ofb, desx, rc2, safer, 3-way, gost,
shark, cast-128, square),
* pseudo-random number generators,
and a whole lot more. alternative libraries are libgcrypt and nettle.

this package includes a utility for benchmarking and using the various crypto++ routines from the command line. it also includes the test vectors for validating both the crypto++ implementation and other implementations of these routines.