MD5 and SHA1 with CommonCrypto in Swift 5.0

StringHashAdditions.swift

import Foundation
import CommonCrypto

extension String {
    
    func sha1() -> [UInt8] {
        let data = Data(string.utf8)
        var digest = [UInt8](repeating: 0, count:Int(CC_SHA1_DIGEST_LENGTH))
        data.withUnsafeBytes { _ = CC_SHA1($0.baseAddress, CC_LONG(data.count), &digest) }
        return digest
    }
    
    func sha1String() -> String {
        return sha1().map { String(format: "%02x", $0) }.joined()
    }
    
    func md5() -> [UInt8] {
        let data = Data(string.utf8)
        var digest = [UInt8](repeating: 0, count:Int(CC_MD5_DIGEST_LENGTH))
        data.withUnsafeBytes { _ = CC_MD5($0.baseAddress, CC_LONG(data.count), &digest) }
        return digest
    }
    
    func md5String() -> String {
        return md5().map { String(format: "%02x", $0) }.joined()
    }
}