MD5

This is a toy implementation of the MD5 digest algorithm, implemented in Rust. This program was a fun Rust-learning adventure.

There are a few simple arguments to the program:

~/code/md5 ~>> cargo build --release
Finished release [optimized] target(s) in 0.03s

~/code/md5 ~>> ./target/release/md5 --test
tests completed successfully!

~/code/md5 ~>> ./target/release/md5 --string abcde
ab56b4d92b40713acc5af89985d4b786

~/code/md5 ~>> echo -n abcde > input_file.txt
~/code/md5 ~>> ./target/release/md5 --path input_file.txt
ab56b4d92b40713acc5af89985d4b786

I tested the performance of this code against the built-in md5 command-line tool in OSX using the 2006 English Wikipedia Corpus, whose size comes in around ~954Mb.

~/code/md5 ~>> time ./target/release/md5 --path ~/Downloads/wiki/enwik9 
e206c3450ac99950df65bf70ef61a12d

real	0m1.871s
user	0m1.675s
sys     0m0.193s

~/code/md5 ~>> time md5 ~/Downloads/wiki/enwik9 
MD5 (/Users/mike/Downloads/wiki/enwik9) = e206c3450ac99950df65bf70ef61a12d

real	0m1.776s
user	0m1.741s
sys    	0m0.152s

This code comes in around 105% of the digest time of that tool.