lrzip-0.6x file format March 2011 Con Kolivas Byte Content 0-23 Magic --- 24+ Rzip Chunk Data (RCD) RCD+ Data blocks --- repeat (end-MD5_DIGEST_SIZE)->(end) md5 hash Magic data: 0->3 LRZI 4 LRZIP Major Version Number 5 LRZIP Minor Version Number 6->14 Source File Size or 0 if unknown, or salt in encrypted file 16->20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size) 21 1 = md5sum hash is stored at the end of the archive 22 1 = data is encrypted with sha512/aes128 23 Unused Encrypted salt (bytes 6->14 in magic if encrypted): 0->1 Encoded number of loops to hash password 2->7 Random data (RCD0 is set to 8 bytes always on encrypted files) Rzip Chunk Data: 0 Data offsets byte width (meaning length is < (2 * 8)^RCD0) 1 Flag that there is no chunk beyond this (RCD0 bytes) Chunk decompressed size (not stored in encrypted file) XX Stream 0 header data XX Stream 1 header data Stream Header Data: Byte: 0 Compressed data type (RCD0 bytes) Compressed data length (RCD0 bytes) Uncompressed data length (RCD0 bytes) Next block head Data blocks: 0->(end-2) data (end-1)->end crc data lrzip-0.5x file format March 2011 Con Kolivas Byte Content 0->23 Magic -- 24->74 Rzip chunk data 75+ Data blocks -- repeat (end-MD5_DIGEST_SIZE)->(end) md5 hash Magic data: 0->3 LRZI 4 LRZIP Major Version Number 5 LRZIP Minor Version Number 6->14 Source File Size 16->20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size) 21 Flag that md5sum hash is stored at the end of the archive 22-23 not used Rzip chunk data: 0 Data offsets byte width 1-25 Stream 0 header data 26-50 Stream 1 header data Stream Header Data: Byte: 0 Compressed data type 1-8 Compressed data length 9-16 Uncompressed data length 17-24 Next block head Data blocks: 0->(end-2) data (end-1)->end crc data lrzip-0.40+ file header format November 2009 Con Kolivas Byte Content 0-3 LRZI 4 LRZIP Major Version Number 5 LRZIP Minor Version Number 6-14 Source File Size 16-20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size) 21-24 not used 24-48 Stream 1 header data 49-74 Stream 2 header data Block Data: Byte: 0 Compressed data type 1-8 Compressed data length 9-16 Uncompressed data length 17-24 Next block head 25+ Data End: 0-1 crc data lrzip-0.24+ file header format January 2009 Peter Hyman, pete@peterhyman.com Byte Content 0-3 LRZI 4 LRZIP Major Version Number 5 LRZIP Minor Version Number 6-9 Source File Size (no HAVE_LARGE_FILES) 6-14 Source File Size 16-20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size) 21-23 not used 24-36 Stream 1 header data 37-50 Stream 2 header data 51 Compressed data type