5.3 Available cipher modes

GCRY_CIPHER_MODE_NONE

No mode specified. This should not be used. The only exception is that if Libgcrypt is not used in FIPS mode and if any debug flag has been set, this mode may be used to bypass the actual encryption.

GCRY_CIPHER_MODE_ECB

Electronic Codebook mode.

GCRY_CIPHER_MODE_CFB

Cipher Feedback mode.

GCRY_CIPHER_MODE_CBC

Cipher Block Chaining mode.

GCRY_CIPHER_MODE_STREAM

Stream mode, only to be used with stream cipher algorithms.

GCRY_CIPHER_MODE_OFB

Output Feedback mode.

GCRY_CIPHER_MODE_CTR

Counter mode.