Commit Graph

5 Commits

Author SHA1 Message Date
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
KongQun Yang a9e5a2ff4f Refactor and optimize cbc encryption/decryption
- Optimize and clean up encryption and decryption code.
- Consolidate various CBC encryption/decryption schemes into a
  common class.
- Make it a constructor argument whether cipher block chain is
  continuous across Encrypt/Decrypt calls.
- Also align protected region size as required in CENC spec.

Issue #77

Change-Id: I533d92ada3cd80933b532b9c3a1cca105ba66f8e
2016-03-30 17:22:13 -07:00
Bei Li e39c3572af Add support for "AES 128-bit Cipher Block Chaining (CBC-128) Encryption"
- Part 1.

- Add packager command line argument "protection_scheme" to specify
  protection scheme. Plumb through packager code to enable CBC
  encryption/decryption.
- Add scheme type "cbc1" to sinf.
- Refactor AES encryptor and decryptor.
- Need more work in the subsample handling.

Issue #77

Change-Id: I3a9304d89adf5efbfb226b6e805a3077b6cb8c68
2016-03-17 16:51:04 -07:00
KongQun Yang 22498e125a Add WebM decryption support
- Also refactor decryptor management code out of mp4_media_parser.cc
- Move decryptor managment logic to DecryptorSource class to make it
  available for webm as well
- Remove data_offset member from DecryptConfig which is not useful
- Add widevine_pssh_data.proto file

Closes #72

Change-Id: I1d32baf4013ebd3382b5372c7433fae5033a260e
2016-01-21 16:59:58 -08:00