MD5 and SHA1 on String in Swift 3

MD5StringTest.swift

import XCTest


@testable import <#project#>

class StringMD5Test: XCTestCase {
    
    func testMD5() {
        let string = "soroush khanlou"
        XCTAssertEqual(string.md5, "954d741d14b14002d1ba88f600eee635")
    }
    
    func testSHA1() {
        let string = "soroush khanlou"
        XCTAssertEqual(string.sha1, "fceb4911d567baae6c2027b3024e3b03175450d3")
    }
    
}

Project-BridgingHeader.h

//
//  Use this file to import your target's public headers that you would like to expose to Swift.
//

#import <CommonCrypto/CommonCrypto.h>

String+MD5.swfit

extension String {
    
    var md5: String? {
        guard let data = self.data(using: String.Encoding.utf8) else { return nil }
        
        let hash = data.withUnsafeBytes { (bytes: UnsafePointer<Data>) -> [UInt8] in
            var hash: [UInt8] = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))
            CC_MD5(bytes, CC_LONG(data.count), &hash)
            return hash
        }
        
        return hash.map { String(format: "%02x", $0) }.joined()
    }
    
    var sha1: String? {
        guard let data = self.data(using: String.Encoding.utf8) else { return nil }

        let hash = data.withUnsafeBytes { (bytes: UnsafePointer<Data>) -> [UInt8] in
            var hash: [UInt8] = [UInt8](repeating: 0, count: Int(CC_SHA1_DIGEST_LENGTH))
            CC_SHA1(bytes, CC_LONG(data.count), &hash)
            return hash
        }

        return hash.map { String(format: "%02x", $0) }.joined()
    }
}