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3 Commits

Author SHA1 Message Date
KongQun Yang 13202f91b6 Fix a few problems in AesCryptor classes 
- CBC cryptors should accept IV of size 8 bytes - it will be zero
  extended to 16 bytes.
- Fixed iv() not updated problem in AesPatternCryptor.
- Replace kChainAcrossCalls with ConstantIvFlag enum flags.

Change-Id: I3fb4de0e8abbe891e6271e779373ba53f8df660d
 2016-04-20 14:14:04 -07:00
KongQun Yang 2ac57bf9b9 Use FOURCC as protection scheme parameter 
- Remove EncryptionMode enums
- Remove AesEncryptor::InitializeWithRandomIv, replaced with
  a static function AesCryptor::GenerateRandomIv, which should
  be called to generate the iv if the iv is empty.

This change is to prepare support for CBCS and CENS pattern-based
protection schemes.

Issue #77

Change-Id: Icba35089d6e451cbea7ebbf5dd5674079f206390
 2016-04-12 16:06:49 -07:00
KongQun Yang 5fc09763ce More cleanups in AesEncryptor and AesDecryptor 
- Create AesCryptor class as the common base
- AesCryptor::Crypt function will serve as an Encrypt function for
  encryptor and a Decrypt function for Decryptor.

Change-Id: Ie91fb14964b5091786705bf510656f40d73af160
 2016-04-11 23:30:32 +00:00