Re: [RFC] CryptoAPI & Compression

[Artem B. Bityuckiy]

Herbert Xu wrote:
> You can't compress 1M-12bytes into 1M using zlib when the block size
> is 64K.
Here is a cite from RFC-1951 (page 4):

   A compressed data set consists of a series of blocks, corresponding
   to successive blocks of input data.  The block sizes are arbitrary,
   except that non-compressible blocks are limited to 65,535 bytes.

Thus,

1. 64K is only applied to non-compressible data, in which case zlib just 
copies it as it is, adding a 1-byte header and a 1-byte EOB marker.

2. 64K is just the *upper limit*, and blocks may be shorter.

3. If zlib compressed data (i.e., applied LZ77 & Huffman), blocks may 
have arbitrary length.

So, I don't see any reason why I can't.

--
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.
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