AWS API Dlang, hmac sha256 function.

[holo via Digitalmars-d-learn]

Hello

I'm trying to contact AWS API with D according to documentation:

http://docs.aws.amazon.com/general/latest/gr/sigv4_signing.html

there is written example in python which i want to rewrite to D:

http://docs.aws.amazon.com/general/latest/gr/sigv4-signed-request-examples.html

I want to ask about such 2 things:

Is it equivalent in D:

hexDigest!SHA256("sometexttohash");

for such python method:

hashlib.sha256('sometexttohash').hexdigest()

?

Maybe is there some prettier solution in D eg:

toHexString(sha256Of("sometexttohash"));

or

SHA256 sha;
sha.start();
string data = "sometexttohash";
sha.put(data);
toHexString(sha.finish())

If those are equivalents to python method which should i choose?

Last but not least, how to write such function in D:

def sign(key, msg):
     return hmac.new(key, msg.encode("utf-8"), 
hashlib.sha256).digest()

?

I can't find in standard libraryt hmac function, is it existing?

//holo