public class SRTPCipherF8
extends java.lang.Object
SRTPCipherF8 implements SRTP F8 Mode Encryption for 128 bits block cipher.
F8 Mode AES Encryption algorithm is defined in RFC3711, section 4.1.2.
Other than Null Cipher, RFC3711 defined two two encryption algorithms:
Counter Mode AES Encryption and F8 Mode AES encryption. Both encryption
algorithms are capable to encrypt / decrypt arbitrary length data, and the
size of packet data is not required to be a multiple of the cipher block
size (128bit). So, no padding is needed.
Please note: these two encryption algorithms are specially defined by SRTP.
They are not common AES encryption modes, so you will not be able to find a
replacement implementation in common cryptographic libraries.
As defined by RFC3711: F8 mode encryption is optional.
mandatory to impl optional default
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encryption AES-CM, NULL AES-f8 AES-CM
message integrity HMAC-SHA1 - HMAC-SHA1
key derivation (PRF) AES-CM - AES-CM
- Author:
- Bing SU ([email protected]), Werner Dittmann