Create hash in swift using key and message

Question

I want to create an SHA1 hmac hash of a string using a key in swift. In obj-c I used this and it worked great:

+(NSString *)sha1FromMessage:(NSString *)messa         


        

Answer 1

The last parameter of the CCHmac() function has the type UnsafeMutablePointer<Void> because that's where the result is written to. You have to declare cHMAC as variable and pass it as an in-out expression with &. In addition, some type conversions are necessary:

var cHMAC = [CUnsignedChar](count: Int(CC_SHA1_DIGEST_LENGTH), repeatedValue: 0)
CCHmac(CCHmacAlgorithm(kCCHmacAlgSHA1), cKey, UInt(cKey.count), cData, UInt(cData.count), &cHMAC)

Answer 2

Apple enum values are defined differently in Swift. Instead of kCCHmacAlgSHA1, it's probably defined like CCHmacAlgorithm.SHA1.

This is answered here: https://stackoverflow.com/a/24411522/2708650