main.swift

import ArgumentParser
import Crypto

struct Hsh: ParsableCommand {
    static var configuration = CommandConfiguration(
        subcommands: [Md5.self, Sha1.self]
    )
}

struct Md5: ParsableCommand {
    @Argument(help: "String to calculate MD5 hash from")
    var value: String

    mutating func run() {
        let data = value.data(using: .utf8)
        let hash = Insecure.MD5.hash(data: data!)
        print(hash.map { String(format: "%02hhx", $0) }.joined())
    }
}

struct Sha1: ParsableCommand {
    @Argument(help: "String to calculate Sha1 hash from")
    var value: String

    mutating func run() {
        let data = value.data(using: .utf8)
        let hash = Insecure.SHA1.hash(data: data!)
        print(hash.map { String(format: "%02hhx", $0) }.joined())
    }
}

Hsh.main()