# Functions
KeyUnwrap decrypts previously encrypted key (CEK) with KEK key using AES Key Wrap (rfc 3394) algorithm.
KeyWrap encrypts provided key (CEK) with KEK key using AES Key Wrap (rfc 3394) algorithm.
NewECBDecrypter creates BlockMode for AES decryption in ECB mode.
NewECBEncrypter creates BlockMode for AES encryption in ECB mode.