5.1 Available ciphers

GCRY_CIPHER_NONE

This is not a real algorithm but used by some functions as error return. The value always evaluates to false.

GCRY_CIPHER_IDEA

This is the IDEA algorithm.

GCRY_CIPHER_3DES

Triple-DES with 3 keys as EDE. The key size of this algorithm is 168 bits but you have to pass 192 bits because the most significant bits of each byte are ignored.

GCRY_CIPHER_CAST5

CAST128-5 block cipher algorithm. The key size is 128 bits.

GCRY_CIPHER_BLOWFISH

The blowfish algorithm. The supported key sizes are 8 to 576 bits in 8 bit increments.

GCRY_CIPHER_SAFER_SK128

Reserved and not currently implemented.

GCRY_CIPHER_DES_SK

Reserved and not currently implemented.

GCRY_CIPHER_AES

GCRY_CIPHER_AES128

GCRY_CIPHER_RIJNDAEL

GCRY_CIPHER_RIJNDAEL128

AES (Rijndael) with a 128 bit key.

GCRY_CIPHER_AES192

GCRY_CIPHER_RIJNDAEL192

AES (Rijndael) with a 192 bit key.

GCRY_CIPHER_AES256

GCRY_CIPHER_RIJNDAEL256

AES (Rijndael) with a 256 bit key.

GCRY_CIPHER_TWOFISH

The Twofish algorithm with a 256 bit key.

GCRY_CIPHER_TWOFISH128

The Twofish algorithm with a 128 bit key.

GCRY_CIPHER_ARCFOUR

An algorithm which is 100% compatible with RSA Inc.’s RC4 algorithm. Note that this is a stream cipher and must be used very carefully to avoid a couple of weaknesses.

GCRY_CIPHER_DES

Standard DES with a 56 bit key. You need to pass 64 bits but the high bits of each byte are ignored. Note, that this is a weak algorithm which can be broken in reasonable time using a brute force approach.

GCRY_CIPHER_SERPENT128

GCRY_CIPHER_SERPENT192

GCRY_CIPHER_SERPENT256

The Serpent cipher from the AES contest.

GCRY_CIPHER_RFC2268_40

GCRY_CIPHER_RFC2268_128

Ron’s Cipher 2 in the 40 and 128 bit variants.

GCRY_CIPHER_SEED

A 128 bit cipher as described by RFC4269.

GCRY_CIPHER_CAMELLIA128

GCRY_CIPHER_CAMELLIA192

GCRY_CIPHER_CAMELLIA256

The Camellia cipher by NTT. See http://info.isl.ntt.co.jp/crypt/eng/camellia/specifications.html.

GCRY_CIPHER_SALSA20

This is the Salsa20 stream cipher.

GCRY_CIPHER_SALSA20R12

This is the Salsa20/12 - reduced round version of Salsa20 stream cipher.

GCRY_CIPHER_GOST28147

The GOST 28147-89 cipher, defined in the respective GOST standard. Translation of this GOST into English is provided in the RFC-5830.

GCRY_CIPHER_GOST28147_MESH

The GOST 28147-89 cipher, defined in the respective GOST standard. Translation of this GOST into English is provided in the RFC-5830. This cipher will use CryptoPro keymeshing as defined in RFC 4357 if it has to be used for the selected parameter set.

GCRY_CIPHER_CHACHA20

This is the ChaCha20 stream cipher.

GCRY_CIPHER_SM4

A 128 bit cipher by the State Cryptography Administration of China (SCA). See https://tools.ietf.org/html/draft-ribose-cfrg-sm4-10.