### 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 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 current implementation allows only for a key size of 128 bits.

`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 bit 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.