A pure julia MD5 implementation. There is few reasons to create new MD5 checksums, but there are a huge number of existing ones. Honestly, just use SHA-256 for everything you would use MD5 for. MD5 is not secure, and it's not faster, and it doesn't have much going for it.
With that said, this is an MD5 implementation.
It directly extends SHA.jl. Using a lot of the same underlying functionality, and it's interface.
Just like the functions from SHA.jl
md5 takes either an Array{UInt8}, a String, or an IO object.
This makes it trivial to checksum a file.
julia> using MD5
julia> bytes2hex(md5("test"))
"098f6bcd4621d373cade4e832627b4f6"
julia> String(read("test.txt"))
"test\n"
julia> open(md5, "test.txt")
16-element Array{UInt8,1}:
0xd8
0xe8
0xfc
0xa2
0xdc
0x0f
0x89
0x6f
0xd7
0xcb
0x4c
0xb0
0x03
0x1b
0xa2
0x49