On 5/4/2014 3:26 PM, Joseph Rushton Wakeling via Digitalmars-d wrote:
On 04/05/14 20:56, Nick Sabalausky via Digitalmars-d wrote:
So I think it's probably safe to figure this is a uniform distribution
unless
some expert chimes in and says otherwise.
Thanks for the help.
You're very welcome. Keep me posted on how things go with your
implementation! :-)
It's now implemented and working in DAuth's HEAD:
https://github.com/Abscissa/DAuth/blob/master/src/dauth/hashdrbg.d
Usage is pretty simple:
----------------------------
import std.algorithm : take;
import std.array : array;
import dauth.sha;
import dauth.hashdrbg;
HashDRBG!uint rand;
// The above is equivalent to:
// HashDRBG!(uint, SHA512, "DAuth") rand;
// Now use rand just like any other RNG in std.random:
uint[] values1 = rand.take(7).array();
// The algorithm specifically supports generating
// arbitrary lengths at once, so can also do:
HashDRBGStream!uint randStream;
ubyte[] values2;
values2.length = 42;
randStream.read(values2);
----------------------------
Next steps are to support Hash_DRBG's optional "additional input"
feature, and to see about Phobos-ifying it and making a pull request.
I'll take a look at your proposed std.random too, sorry I haven't had a
chance to yet.
