Question on Password Encryption, using stdlib or third party lib

[Cym13]

On Monday, 29 July 2019 at 14:37:54 UTC, 0xFFFFFFFF wrote:
> On a project I was asked to
>
> a- Compute SHA-256 of a password
> b- Do a BigInteger, convert to Hex String
> c- Encrypt the key using a public key with the following 
> parameters
>   Entropy: I'm given some numbers
>   Modulus: also given long numbers
>
> [encrypt using RSA algorithm]
>
> So far I'm familiar with a and b in Dlang.
>
> how do I go about c) In Dlang ?
>
> Thanks

I hope it's for a school project since I wouldn't recommend doing 
that in production.

However you can do c) either by implementing RSA (it's rather 
easy to badly implement RSA which could be enough at school 
level) or by using a library (I recommend the library).

There are several cryptographic libraries on 
https://code.dlang.org that implement RSA, botan and crypto for 
example. I'd trust botan more at the moment though I don't think 
any D library has received a proper cryptographic audit at the 
moment.