AES Context (pre-processed key)

AES with 128 bit key

AES with 192 bit key

AES with 256 bit key

AESGCM State

Initialize a new context with a key

Key need to be of length 16, 24 or 32 bytes. any other values will cause undefined behavior

generate a counter mode pad. this is generally xor-ed to an input to make the standard counter mode block operations.

if the length requested is not a multiple of the block cipher size, more data will be returned, so that the returned bytestring is a multiple of the block cipher size.

encrypt using Electronic Code Book (ECB)

encrypt using Cipher Block Chaining (CBC)

encrypt using Counter mode (CTR)

in CTR mode encryption and decryption is the same operation.

encrypt using XTS

the first key is the normal block encryption key the second key is used for the initial block tweak

encrypt using Galois counter mode (GCM) return the encrypted bytestring and the tag associated

note: encrypted data is identical to CTR mode in GCM, however a tag is also computed.

encrypt using OCB v3 return the encrypted bytestring and the tag associated

decrypt using Electronic Code Book (ECB)

decrypt using Cipher block chaining (CBC)

decrypt using Counter mode (CTR).

in CTR mode encryption and decryption is the same operation.

decrypt using XTS

decrypt using Galois Counter Mode (GCM)

decrypt using Offset Codebook Mode (OCB)