|0.1.1||Oct 30, 2019|
|0.1.0||Oct 22, 2019|
#445 in Network programming
librsyncr is a Rust library to calculate differences between two files without having access to both files on the same system. It is a rewrite of the librsync C library (without looking at the librsync source code), and the signature and delta files are compatible with that library. The C library is 3562 lines of C (not including comments or vendored Blake2 and MD4 code), but this library is only 753.
The default hash used for looking up blocks from a signature file is not resistant to hash DoS attacks. If you are using this library in a web service to process untrusted signature files, you will likely want to enable the
Testing with Wikiquote dump files (about 38 MB) on a Intel Core-i7-6700K 4.0 GHz processor:
# this library ./target/release/examples/rdiff signature ./enwikiquote-20170501-abstract.xml ./enwikiquote-20170501-abstract-sig.xml 85ms (447 MB/s) # librsync ./rdiff signature ./enwikiquote-20170501-abstract.xml ./enwikiquote-20170501-abstract-sig.xml 77ms (494 MB/s) # this library ./target/release/examples/rdiff delta ./enwikiquote-20170501-abstract-sig.xml ./enwikiquote-20170701-abstract.xml ./enwikiquote-delta.xml 115ms (330 MB/s) # librsync ./rdiff delta ./enwikiquote-20170501-abstract-sig.xml ./enwikiquote-20170701-abstract.xml ./enwikiquote-delta.xml 118ms (322 MB/s) # this library ./target/release/examples/rdiff patch ./enwikiquote-20170501-abstract.xml ./enwikiquote-delta.xml ./enwikiquote-new.xml 67ms (567 MB/s) # librsync ./rdiff patch ./enwikiquote-20170501-abstract.xml ./enwikiquote-delta.xml ./enwikiquote-new.xml 24ms (1583 MB/s)
Licensed under the Mozilla Public License Version 2.0.