CCKeyDerivationPBKDF如何轉換爲Xamarin.iOS？

Question

我有下面的ObjC方法，我想調用它將其移植到託管代碼，但不知道從哪裏開始。有人可以協助嗎？

- (NSData *)deriveKey 
{ 
    NSData *passphrase = [self.passwordField.stringValue dataUsingEncoding:NSUTF8StringEncoding]; 
    NSData *salt = [self.saltField.stringValue dataUsingEncoding:NSUTF8StringEncoding]; 
    NSMutableData *key = [NSMutableData dataWithLength:kCCKeySizeAES256]; 
    CCKeyDerivationPBKDF(kCCPBKDF2, 
         [passphrase bytes], 
         [passphrase length], 
         [salt bytes], 
         [salt length], 
         kCCPRFHmacAlgSHA256, 
         PBKDFNumberOfRounds, 
         [key mutableBytes], 
         [key length]); 
    return key; 
} 

Answer 1

在.NET PKCS＃5V2（定義PBKDF2）支持可使用Rfc2898DeriveBytes。但是它不會讓您選擇散列算法。

var salt = new byte [32]; // do not use it empty :) 
var key = new Rfc2898DeriveBytes ("passphrase", salt, 1000).GetBytes (length);