greg/pcompress
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
320 commits 3 branches 21 tags 7.6 MiB
Commit graph

320 commits

This branch
This branch
All branches
Author SHA1 Message Date
Moinak Ghosh
817e16cce6 Use HMAC on header and encrypted data, avoid regular digest when encrypting. 2012-11-23 22:27:14 +05:30
Moinak Ghosh
6e9ca97bdf Add CRC32 header checksums in non-cryptographic mode. 2012-11-23 00:00:39 +05:30
Moinak Ghosh
d054e0f713 Zlib optimizations. Use raw deflate streams to avoid unnecessary adler32. 
Change some function signatures to improve algo init function behavior.
Fix corner case dedupe bug in error handling flow.
Bump archive version signature.
 2012-11-22 21:02:50 +05:30
Moinak Ghosh
3b1d6b55fe Work in progress global dedupe config loader. 2012-11-19 21:41:56 +05:30
Moinak Ghosh
2909a3abff Update README. 2012-11-18 23:19:22 +05:30
Moinak Ghosh
393ced991a A couple of minor cleanups. 2012-11-18 20:20:16 +05:30
Moinak Ghosh
b2cbf0699e Use fixed rolling-hash mask for better block size approximation. 2012-11-11 14:58:39 +05:30
Moinak Ghosh
4d2e8ba644 Update Changelog for 1.0 release. 
Update version string and install doc.
Add Fixed-Block Deduplication tests.
 2012-11-09 21:42:56 +05:30
Moinak Ghosh
f9a15972d6 Add some more crypto test cases. 2012-11-09 21:17:06 +05:30
Moinak Ghosh
5b1a13480b Fix chunk flag setup when compression fails in adaptive mode. 
Prevent display of non-fatal errors during compression.
 2012-11-09 21:07:23 +05:30
Moinak Ghosh
77db54e712 Add buffer overflow check in Ppmd compression routines. 
Fix pipe mode encryption check.
Change file difference check in tests.
Add more tests.
 2012-11-09 20:05:13 +05:30
Moinak Ghosh
da9083ae12 Fix encryption with adaptive modes. 
Add missing zero-out of algorithm data field.
 2012-11-09 18:53:48 +05:30
Moinak Ghosh
7debc60dd5 Add a functionality test suite. 2012-11-08 22:22:37 +05:30
Moinak Ghosh
eacbf207aa Tweak chunking parameters for better block size distribution and dedupe ratio. 2012-11-08 19:41:33 +05:30
Moinak Ghosh
e437390e53 Add some more debug mode info. 2012-11-07 22:55:14 +05:30
Moinak Ghosh
3aa33f5b94 Minor fix for adapt mode. 2012-11-04 21:46:04 +05:30
Moinak Ghosh
f0c7ba87a3 Use Libbsc for XML data in adapt2 mode. 2012-11-04 21:13:26 +05:30
Moinak Ghosh
ddda9e5320 Bump version to 0.9.1 
Update Changelog.
 2012-10-24 18:46:27 +05:30
Moinak Ghosh
c5ebe1f30a Portability to Debian based distros. 
Enable SSE4/AVX detection for AMD platforms (Bulldozer has both).
Portable long long int print formatting to silence gcc 4.6 warnings.
 2012-10-21 21:03:07 +05:30
Moinak Ghosh
45487469d1 Add another example invocation. 2012-10-21 12:34:34 +05:30
Moinak Ghosh
189d32ea52 Bump version to 0.9.0. 
Update Changelog.
 2012-10-20 23:10:05 +05:30
Moinak Ghosh
315bb50264 Change chunk HMAC to only check header, not full data. Digest in hdr int turn validates data. 2012-10-19 21:51:27 +05:30
Moinak Ghosh
1eb8c94fed Implement HMAC verification for chunk data and header. 
Do not ask for decryption passwd twice.
 2012-10-18 22:55:41 +05:30
Moinak Ghosh
d13aad830e Implement HMAC Functionality. 
Refactor crypto utility functions in a separate file.
Add HMAC verification for file header.
Add a few extra input validation checks.
Include space in chunk header for HMAC.
 2012-10-17 23:32:35 +05:30
Moinak Ghosh
f2d7bea902 Support for chunk-level encryption using AES and Scrypt based PBE. 
Couple of minor fixes.
 2012-10-15 12:10:00 +05:30
Moinak Ghosh
21cbef6d60 Incorporate SSE/AVX optimized Intel SHA-256 implementation. 
Add support for runtime cpuid detection.
 2012-10-06 20:51:23 +05:30
Moinak Ghosh
c880b73d26 Fix typo. 2012-10-03 22:47:16 +05:30
Moinak Ghosh
2578676b1b Add support for SHA256 and SHA512 digests from OpenSSL library. 2012-10-03 22:43:02 +05:30
Moinak Ghosh
3492949aff Bump version to 0.8.6 
Update Changelog
 2012-10-02 10:24:32 +05:30
Moinak Ghosh
9475ccc3d6 Fix polynomial computation. 
Fix incorrect block length when doing fixed-block dedupe.
 2012-10-02 00:20:44 +05:30
Moinak Ghosh
0019efbadb Adjust break pattern check mask for closer approximation to average block size. 
Remove unused structure member.
 2012-09-29 23:31:45 +05:30
Moinak Ghosh
24e6f4e629 Switch to multiplicative rolling hash for good distribution properties. 2012-09-29 00:09:49 +05:30
Moinak Ghosh
d94be4e314 Update Changelog and bump version to 0.8.5. 2012-09-27 23:16:13 +05:30
Moinak Ghosh
8f8af7ed6b Update adaptive mode heuristic based on algorithms. 
Remove incorrect check in PPMd decompression code.
More refactoring of variable names.
 2012-09-27 22:29:08 +05:30
Moinak Ghosh
449dc35675 Speed up adaptive modes by using heuristics to select compression algorithm. 
Select similarity percentage based on dedupe block size for effectiveness.
 2012-09-26 19:47:32 +05:30
Moinak Ghosh
333b7b011e Fix check for size reduction in dedupe. 
Tweak debug message for clarity.
 2012-09-25 23:24:33 +05:30
Moinak Ghosh
3544a8c708 Fix polynomial table computation. 
Change hashing and length bias to reduce hashtable bucket collisions.
Add support for user-selectable 60% or 40% similarity for Delta Compression.
Overall slight speedup.
 2012-09-24 22:20:27 +05:30
Moinak Ghosh
8386e72566 Rewrite core dedupe logic to simplify code and improve performance. 
Hashtable based chunk-level deduplication instead of Quicksort.
Fix a corner case bug in Dedupe decompression.
 2012-09-23 14:57:09 +05:30
Moinak Ghosh
99a8e4cd98 Speed up Hash computation for dedupe blocks. 
Add missing initialization of sliding window.
Update help text.
 2012-09-19 20:29:44 +05:30
Moinak Ghosh
e3befd9e16 Add support for Fixed-Block deduplication. 
More refactoring of symbol names.
 2012-09-16 11:12:58 +05:30
Moinak Ghosh
b9355a5dcc Reduce dedupe loop checks for slight speed edge. 
Beginnings of Fixed-block dedupe.
Update variable name for clarity.
 2012-09-15 11:14:58 +05:30
Moinak Ghosh
a6b3719d89 Fix conditional in heapq function. 2012-09-11 21:59:08 +05:30
Moinak Ghosh
f3f472b860 Implement K-min-values Sketch for Similarity detection. 2012-09-11 20:26:36 +05:30
Moinak Ghosh
117382c141 Update README to reflect current features. 2012-09-07 21:32:20 +05:30
Moinak Ghosh
05a010a9dd Bump version to 0.8.1 
Update Changelog for 0.8.1 release.
 2012-09-07 19:38:36 +05:30
Moinak Ghosh
fb0aef0bd6 Fix return code handling in LZP pre-compression, crashed adaptive modes. 2012-09-07 19:31:35 +05:30
Moinak Ghosh
e6f042aaf8 Allow user-specified minimum Dedupe block size. 
Compute similarity sketch only if Delta Compression enabled.
 2012-09-05 22:43:54 +05:30
Moinak Ghosh
560fa85aab Fix secondary sketch computation, some more accuracy in diff detection. 2012-09-04 23:28:02 +05:30
Moinak Ghosh
262566b59a Add xxHash for Rabin block checksums, slightly faster than CRC64. 
Fix missing initialization of character counts table.
Some file reorganization.
 2012-09-02 20:40:32 +05:30
Moinak Ghosh
4ba840b255 Add ASM version of Skein for x64 platforms with auto-detection 
Error checking for checksum flag when decompressing
Update comments and READMEs
 2012-09-01 14:40:15 +05:30