Step by Step solution about How to resolve the algorithm SHA-256 step by step in the Julia programming language

The provided code in Julia performs the following tasks:

1. Importing Libraries:

   • It imports the Nettle and SHA libraries, which provide functions for cryptographic hashing.

2. Defining Message:

   • It defines a string variable msg with the value "Rosetta code".

3. SHA-256 Hashing with Nettle:

   • It uses the hexdigest function from the Nettle library to compute the SHA-256 hash of the message msg. The result is stored in the variable digest.

4. Native SHA-256 Hashing:

   • It uses the sha256 function from the native SHA library to calculate the SHA-256 hash of msg.
   • The result is converted into a hexadecimal string using the num2hex function and joined together using the join function, storing it in the variable digest1.

5. Verification:

   • It compares the digest obtained from Nettle with digest1 obtained from the native SHA library using the @assert macro. This macro verifies if both values are equal, and if not, it throws an error.

In summary, this code demonstrates two methods for calculating SHA-256 hashes in Julia and verifies that they produce the same results.

msg = "Rosetta code"

using Nettle
digest = hexdigest("sha256", msg)

# native
using SHA
digest1 = join(num2hex.(sha256(msg)))

@assert digest == digest1