The Sha2 package

This package provides an implementation of the Sha2 family of hash functions implemented in Motoko. The supported algorithms are:

• sha224
• sha256
• sha512-224
• sha512-256
• sha384
• sha512

Usage

The code was derived from https://github.com/enzoh/motoko-sha/. In contrast to the functions there, this code can hash type Blob. More generally, it can hash type Iter<Nat8>. Hence, for data of any of the types Blob, [Nat8] or [var Nat8] one can make the same call SHA2.fromIter(#sha512,data.vals()). For type Blob there is also the shorthand form SHA2.fromBlob(#sha512,data). The allowed algorithms are #sha224, #sha256, #sha384, #sha512, #sha512_224, #sha512_256.