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

So here is the Solution and I know It will save your time 100%

BridgingHeader - > Used to Expose Objective-c code to a Swift Project

CommonCrypto - > is the file needed to use md5 hash

Since Common Crypto is a Objective-c file, you need to use BridgingHeader to use method needed for hashing

---

(e.g)

extension String {
func md5() -> String! {
    let str = self.cStringUsingEncoding(NSUTF8StringEncoding)
    let strLen = CUnsignedInt(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
    let digestLen = Int(CC_MD5_DIGEST_LENGTH)
    let result = UnsafeMutablePointer.alloc(digestLen)
    CC_MD5(str!, strLen, result)
    var hash = NSMutableString()
    for i in 0..

}

How to add Common Crypto into a Swift Project??

This link will teach you how (STEP by STEP).

I recommend using Bridging Header

*************Updated Swift 3****************

extension String {
func toMD5()  -> String {

        if let messageData = self.data(using:String.Encoding.utf8) {
            var digestData = Data(count: Int(CC_MD5_DIGEST_LENGTH))

            _ = digestData.withUnsafeMutableBytes {digestBytes in
                messageData.withUnsafeBytes {messageBytes in
                    CC_MD5(messageBytes, CC_LONG((messageData.count)), digestBytes)
                }
            }
            return digestData.hexString()
        }

        return self
    }
}


extension Data {

    func hexString() -> String {
        let string = self.map{ String($0, radix:16) }.joined()
        return string
    }

}

How to use?

let stringConvertedToMD5 = "foo".toMD5()