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Libgcrypt
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<p>Libgcrypt is a cryptography library developed as a separated module of <a href="/facts/GnuPG/EqmGmx7V">GnuPG</a>. It can also be used independently of GnuPG, but depends on its error-reporting library Libgpg-error. </p><p>It provides functions for all fundamental cryptographic building blocks: </p> <table><tbody><tr><th>Primitive or Operation</th><th>Algorithms or Implementation</th></tr><tr><td><a href="/facts/Symmetric-key_algorithm/5zfe0b76">symmetric ciphers</a>:</td><td><a href="/facts/Advanced_Encryption_Standard/HdXGBY2Q">AES</a> (128, 192, 256 bits), <a href="/facts/Data_Encryption_Standard/STfBjTGb">DES</a>, <a href="/facts/Triple_DES/sgzSD50P">3DES</a>, <a href="/facts/International_Data_Encryption_Algorithm/HuRBKLQY">IDEA</a>, <a href="/facts/CAST-128/J7F8GWQc">CAST5</a>, <a href="/facts/Blowfish_(cipher)/H6fYatpd">Blowfish</a>, <a href="/facts/Twofish/T1pjlttA">Twofish</a> (128, 256 bits), <a href="/facts/RC2/kfXo2PEH">Ron's Cipher 2 / RC2</a> (40, 128 bits), <a href="/facts/RC4/HAR5kL0T">ARCfour / RC4</a>, <a href="/facts/SEED/QE5n8M7Q">SEED</a> (RFC <a href="https://datatracker.ietf.org/doc/html/rfc4269">4269</a>), <a href="/facts/Serpent_(cipher)/1gPjU4Fu">Serpent</a> (128, 192, 256 bits), <a href="/facts/Camellia_(cipher)/XyJ1vnGn">Camellia</a> (128, 192, 256 bits), <a href="/facts/Salsa20/gQjhIf2M">Salsa20, Salsa20/12, ChaCha20</a>, <a href="/facts/GOST_(block_cipher)/AVDEpgqH">GOST 28147-89</a> (RFC <a href="https://datatracker.ietf.org/doc/html/rfc5830">5830</a>) / <a href="/facts/GOST_(block_cipher)/AVDEpgqH">GOST R 34.12-2015</a> (Magma: RFC <a href="https://datatracker.ietf.org/doc/html/rfc8891">8891</a> & Kuznyechik: RFC <a href="https://datatracker.ietf.org/doc/html/rfc7801">7801</a>), <a href="/facts/SM4_(cipher)/05jCyaFf">SM4</a>, <a href="/facts/ARIA_(cipher)/Kbgkr0WB">ARIA</a></td></tr><tr><td>cipher modes:</td><td><a href="/facts/Block_cipher_mode_of_operation/vIUabB2z">ECB, CFB, CBC, OFB, CTR</a>, <a href="/facts/CCM_mode/nChu3RLm">CCM</a>, <a href="/facts/Galois/Counter_Mode/bx43MwfC">GCM</a>, <a href="/facts/OCB_mode/n5ucDXFx">OCB</a>, <a href="/facts/EAX_mode/2dcXnlGa">EAX</a>, <a href="/facts/XTS_mode/VKWR7vfN">XTS</a>, <a href="/facts/Stream_cipher/BxU0aWmJ">Stream</a>, <a href="/facts/Key_wrap/kpbaS476">AES Key Wrap</a> (RFC <a href="https://datatracker.ietf.org/doc/html/rfc3394">3394</a>), AES Key Wrap with padding (RFC <a href="https://datatracker.ietf.org/doc/html/rfc5649">5649</a>), <a href="/facts/Key_wrap/kpbaS476">SIV</a> (RFC <a href="https://datatracker.ietf.org/doc/html/rfc5297">5297</a>) and <a href="/facts/AES-GCM-SIV/MT6DkylQ">GCM-SIV</a> (RFC <a href="https://datatracker.ietf.org/doc/html/rfc8452">8452</a>)</td></tr><tr><td><a href="/facts/Public-key_cryptography/gowoFTxS">public key algorithms</a>:</td><td><a href="/facts/RSA_(algorithm)/XTzyfHuq">RSA</a>, <a href="/facts/ElGamal_encryption/sKDVyMyR">ElGamal</a>, <a href="/facts/Digital_Signature_Algorithm/0o0FK486">DSA</a>, <a href="/facts/Elliptic_Curve_DSA/gl0mfnS1">ECDSA</a>, <a href="/facts/EdDSA/IbTRBhK3">EdDSA</a>, <a href="/facts/EdDSA/IbTRBhK3">Ed448</a>, <a href="/facts/D-H/xR4YQcaD">DH</a>, <a href="/facts/Ephemeral_key/qY2BTuRk">EDH</a>, <a href="/facts/ECDH/zy3IJCeK">ECDH</a></td></tr><tr><td><a href="/facts/Hash_function/rk6MlCt3">hash algorithms</a>:</td><td><a href="/facts/MD2_(cryptography)/eycTYeaf">MD2</a>, <a href="/facts/MD4/V3dLUpRk">MD4</a>, <a href="/facts/MD5/8WIXb9Dq">MD5</a>, <a href="/facts/SHA-1/LDYCV1je">SHA-1</a>, <a href="/facts/SHA-2/P59oPeGq">SHA-224, SHA-256, SHA-384, SHA-512</a>, <a href="/facts/SHA-3/bA3BCp7K">SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128, SHAKE256</a>, <a href="/facts/RIPEMD/z09kTSWX">RIPEMD-160</a>, <a href="/facts/Tiger_(cryptography)/xLMxNVV5">TIGER/192, TIGER1, TIGER2</a>, <a href="/facts/Whirlpool_(cryptography)/5d6erXP3">Whirlpool</a>, <a href="/facts/CRC-24/u2exo4sv">CRC-24</a> (as in RFC <a href="https://datatracker.ietf.org/doc/html/rfc2440">2440</a>), <a href="/facts/Cyclic_redundancy_check/u2exo4sv">CRC-32 (as in ISO 3309)</a>, <a href="/facts/Cyclic_redundancy_check/u2exo4sv">CRC-32</a> (as in RFC <a href="https://datatracker.ietf.org/doc/html/rfc1510">1510</a>), <a href="/facts/GOST_(hash_function)/7cEUbXDX">GOST R 34.11-94 / GOST 34.311-95</a>, <a href="/facts/Streebog/EdxjXzoI">GOST R 34.11-2012 (Stribog)</a> / RFC <a href="https://datatracker.ietf.org/doc/html/rfc6986">6986</a>, <a href="/facts/BLAKE2/3QuBJ24f">BLAKE2b (128, 160, 224, 256 Bits), BLAKE2s (160, 256, 384, 512 Bits)</a>, <a href="/facts/SM3_(hash_function)/pdIyJ5jN">SM3</a></td></tr><tr><td><a href="/facts/Message_authentication_code/mXxCP5Yl">message authentication codes (MACs)</a>:</td><td><a href="/facts/HMAC/Qy9WD4V9">HMAC</a> for all hash algorithms, <a href="/facts/CMAC/b7ucJK3z">CMAC</a> for all cipher algorithms, <a href="/facts/Galois/Counter_Mode/bx43MwfC">GMAC</a> for some cipher algorithms, <a href="/facts/Poly1305/xlqUKmWX">Poly1305</a></td></tr><tr><td><a href="/facts/Key_derivation_function/3jL2jTTb">key derivation functions (KDFs)</a>:</td><td>S2K (as in RFC <a href="https://datatracker.ietf.org/doc/html/rfc4880">4880</a>: simple, salted, iterated+salted), <a href="/facts/PBKDF2/nIq55BCh">PBKDF2</a>, <a href="/facts/Scrypt/StlAggdS">SCRYPT</a>, <a href="/facts/Argon2/8sAkGSch">Argon2d, Argon2i, Argon2id</a>, <a href="/facts/Balloon_hashing/1F9twjxD">Balloon</a></td></tr><tr><td><a href="/facts/Elliptic_curve_cryptography/YbjcXIWk">elliptic curves</a>:</td><td><a href="/facts/NIST/gr9Fnh85">NIST</a> (<a href="/facts/Elliptic_curve_cryptography/YbjcXIWk">P-256, P-384, P-521</a>), <a href="/facts/SECG/dEGml43n">SECG</a> (<a href="/facts/Elliptic_curve_cryptography/YbjcXIWk">secp256k1</a>), <a href="/facts/ECC_Brainpool/YbjcXIWk">ECC Brainpool</a> / RFC <a href="https://datatracker.ietf.org/doc/html/rfc5639">5639</a> (<a href="/facts/Elliptic_curve_cryptography/YbjcXIWk">P256r1, P384r1, P512r1</a>), <a href="/facts/Daniel_J._Bernstein/KQLuMRTx">Bernstein</a> (<a href="/facts/Curve25519/wLr6FMkV">Curve25519</a>, <a href="/facts/Curve448/gsN24bb9">Curve448</a>), <a href="/facts/GOST/Ith9dFHs">GOST R</a> 34.10-2012 (RFC <a href="https://datatracker.ietf.org/doc/html/rfc7091">7091</a>), <a href="/facts/SM9_(cryptography_standard)/5QkNunda">SM2</a></td></tr></tbody></table> <p>Libgcrypt features its own <a href="/facts/Arbitrary-precision_arithmetic/cXxc8yB2"><i>multiple precision arithmetic</i></a> 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 <i><a href="/facts/Entropy_(computing)/Ds8396El">entropy</a> gathering</i> utility, coming in different versions for Unix-like and Windows machines. </p><p>Usually multiple, stable branches of Libgcrypt are maintained in parallel; since 2022-03-28 this is the Libgrypt 1.10 branch as <a href="/facts/Software_release_life_cycle/z4Q4RElA">stable</a> branch, plus the 1.8 branch as <a href="/facts/Long-term_support/0b0L8MKh">LTS ("long-term support")</a> branch, which will be maintained at least until 2024-12-31. </p>