AES Support

[dgrunwald]

SD-1649, originally created on 2/22/2010 08:18:51 by David Pierson

Add 128 and 256 bit AES support compatible with WinZip's
implementation.

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Comment from David Pierson on 2/22/2010 08:21:57:
Mostly implemented. Creation via Zipfile and ZipOutputStream, and
extraction via ZipFile is now handled (r499).
Extraction via ZipInputStream is not implemented. FastZip is not
implemented.

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Progress:

• Archive creation:
  • Key sizes:
    • 128 bit
    • 192 bit¹
    • 256 bit
  • API support:
    • Zipfile
    • ZipOutputStream
• Archive extraction:
  • Key sizes:
    • 128 bit
    • 192 bit¹
    • 256 bit
  • API support:
    • Zipfile (Should be working?)
    • ZipInputStream - PR WIP [WIP] AES decryption support in ZipInputStream #381
    • FastZip

¹ Creation of archives with 192-bit key is not supported in any of the leading archiving applications (WinRAR, WinZip, 7-zip, info-zip, Keka).

[f00f]

Are there plans to implement AES support for ZipInputStream? Is there an issue or a PR for it? What's the problem with it?

[Numpsy]

Theres a partial implementation in #381, though i hit an issue with auth key handling that I wasn't sure how to fix simply and haven't had chance to look at it recently

[piksel]

Yes, the "problem" is that ZipInputStream works very differently to ZipFile, so it has to be implemented in another (more complex) way.

[Numpsy]

fwiw, I started looking at adding the encryption side pieces to ZipFile ages back and shelved it because I had no time, but i'm looking to get more of that done (#440 is a subset of the required change and tests anyway)

[Numpsy]

WIP for creating AES encrypted files with ZipFile in #443

[remogloor]

Theres a partial implementation in #381, though i hit an issue with auth key handling that I wasn't sure how to fix simply and haven't had chance to look at it recently

The issue with the auth key is solved in #551