Swift SHA256哈希与PHP SHA256哈希不匹配

Question

Has anyone had difficulty getting the hash results from swift to match the same input hash result in PHP? Here's my swift code:

let longPassword = myTextField.text!+email
let pword: Array<UInt8> = Array(longPassword.utf8)
let keyString = self.runHashOnPassword(text: pword, salt: Array(salt.utf8))

func runHashOnPassword(text: Array<UInt8>, salt: Array<UInt8>) -> String {
    do {
        let key = try PKCS5.PBKDF2(password: text,salt: salt, iterations: 4096, variant: .sha256).calculate()
        let jEncoder = JSONEncoder.init()
        let byteString = try jEncoder.encode(key)
        return byteString.base64EncodedString()
    } catch {
        return ""
    }
}

And here is my PHP code:

$longPassword = $pword . $email . $salt;
$newHash = hash('sha256',$longPassword,false);

I have tried altering the boolean flag to true in the PHP hash function but it didn't help. Any ideas? Thank you.

Answer 1

PBKDF2 is not a Digest. You can't compare those two values.

Anyway, this is how you calculate hash: https://github.com/krzyzanowskim/CryptoSwift#calculate-digest , basically:

let hash = bytes.sha256()

in PHP hash('sha256',$longPassword,false); outputs lowercase hexits, so you need something like this:

let hash = bytes.sha256().toHexString()