Enum SSL.Constants.CipherModes Description Cipher operation modes. Constant MODE_cbc constant SSL.Constants.MODE_cbc Description CBC - Cipher Block Chaining mode. Constant MODE_ccm constant SSL.Constants.MODE_ccm Description CCM - Counter with CBC-MAC mode. Constant MODE_ccm_8 constant SSL.Constants.MODE_ccm_8 Description CCM - Counter with 8 bit CBC-MAC mode. Constant MODE_gcm constant SSL.Constants.MODE_gcm Description GCM - Galois Cipher Mode. Constant MODE_poly1305 constant SSL.Constants.MODE_poly1305 Description Poly1305 - Used only with ChaCha20.