Libgcrypt

Libgcrypt

Developer(s)	Werner Koch
Stable release	1.7.0 (April 15, 2016[1]) [±] 1.6.5 (February 9, 2016[2]) [±] 1.5.4 (August 7, 2014[3]) [±]
Written in	C
Operating system	Multi-platform
Type	Cryptographic library
License	GNU Lesser General Public License GNU General Public License
Website	directory.fsf.org/project/libgcrypt/

Libgcrypt is a cryptographic library developed as a separated module of GnuPG.^[4] It can also be used independently of GnuPG, although it requires its error-reporting library.

It provides functions for all cryptographic building blocks:

Primitive or Operation	Algorithms or Implementations
symmetric ciphers:[5]	IDEA, 3DES, CAST5, Blowfish, AES (128, 192, 256 bits), Twofish (128, 256 bits), ARCfour / RC4, DES, Serpent (128, 192, 256 bits), Ron's Cipher 2 / RC2 (40, 128 bits), SEED, Camellia (128, 192, 256 bits), Salsa20, Salsa20/12, ChaCha20, GOST 28147-89
cipher modes:[6]	ECB, CFB, CBC, OFB, CTR, AES-Wrap (RFC 3394), CCM, GCM, Stream, OCB
public key algorithms:[7][8]	RSA, DSA, ElGamal, ECDSA, EdDSA
hash algorithms:[9]	MD2, MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128, SHAKE256, RIPEMD-160, TIGER/192, TIGER1, TIGER2, Whirlpool, CRC-24 (as in RFC 2440), CRC-32 (as in ISO 3309, RFC 1510), GOST R 34.11-94, GOST R 34.11-2012 (256, 512 bits)
message authentication codes (MACs):[10]	HMAC, CMAC, GMAC, Poly1305
key derivation functions (KDFs):[11]	S2K (as in RFC 4880: simple, salted, iterated+salted), PBKDF2, SCRYPT
elliptic curves:	NIST (P-256, P-384, P-521), SECG (secp256k1), ECC Brainpool / RFC 5639 (P256r1, P384r1, P512r1), Bernstein (Curve25519), GOST R (34.10-2001, 34.10-2012)

Libgcrypt features its own multiple precision arithmetic implementation, with assembler implementations for a variety of processors, including Alpha, AMD64, HP PA-RISC, i386, i586, M68K, MIPS 3, PowerPC, and SPARC. It also features an entropy gathering utility, coming in different versions for Unix-like and Windows machines.

References

1. Koch, Werner (2016-04-15). "[Announce] Libgcrypt 1.7.0 released" (Mailing list). gnupg-announce. Retrieved 2016-04-15.
2. Koch, Werner (2016-02-09). "[Announce] Libgcrypt 1.6.5 with security fix released" (Mailing list). gnupg-announce. Retrieved 2016-02-09.
3. Koch, Werner (2014-08-07). "[Announce] Libgcrypt 1.5.4 released" (Mailing list). gnupg-announce. Retrieved 2014-08-08.
4. Werner Koch (4 December 1998). "libgcrypt". Retrieved 3 December 2010.
5. "Available ciphers - The Libgcrypt Reference Manual". Retrieved 2014-08-08.
6. "Available cipher modes - The Libgcrypt Reference Manual". Retrieved 2014-08-08.
7. "Available algorithms - The Libgcrypt Reference Manual". Retrieved 2014-08-08.
8. "Cryptographic Functions - The Libgcrypt Reference Manual". Retrieved 2014-08-08.
9. "Available hash algorithms - The Libgcrypt Reference Manual". Retrieved 2014-08-08.
10. "Available MAC algorithms - The Libgcrypt Reference Manual". Retrieved 2014-08-08.
11. "Key Derivation - The Libgcrypt Reference Manual". Retrieved 2014-08-08.