How to use CC_MD5 method in swift language

Question

in Objective-c, we can hash a string like this:

const char *cStr = [someString UTF8String];
unsigned char result[16];
CC_MD5( cStr, strlen(cStr), result );
m         


        

Answer 1

For cases where a bridging header isn't an option (eg, in a shell script), you can use the command line tool /sbin/md5 via NSTask:

import Foundation

func md5hash(string: String) -> String
{
  let t = NSTask()
  t.launchPath = "/sbin/md5"
  t.arguments = ["-q", "-s", string]
  t.standardOutput = NSPipe()

  t.launch()

  let outData = t.standardOutput.fileHandleForReading.readDataToEndOfFile()
  var outBytes = [UInt8](count:outData.length, repeatedValue:0)
  outData.getBytes(&outBytes, length: outData.length)

  var outString = String(bytes: outBytes, encoding: NSASCIIStringEncoding)

  assert(outString != nil, "failed to md5 input string")

  return outString!.stringByTrimmingCharactersInSet(NSCharacterSet.newlineCharacterSet())
}

Usage:

let md5 = md5hash("hello world")

// 5eb63bbbe01eeed093cb22bb8f5acdc3