Wrap credentials into Objective-C class

OpenVPN Adapter/OpenVPNCredentials.h

@@ -8,6 +8,46 @@
 
 #import <Foundation/Foundation.h>
 
+/**
+ Class used to pass credentials
+ */
 @interface OpenVPNCredentials : NSObject
 
+/**
+ Client username
+ */
+@property (nullable, nonatomic) NSString *username;
+
+/**
+ Client password
+ */
+@property (nullable, nonatomic) NSString *password;
+
+/**
+ Response to challenge
+ */
+@property (nullable, nonatomic) NSString *response;
+
+/**
+ Dynamic challenge/response cookie
+ */
+@property (nullable, nonatomic) NSString *dynamicChallengeCookie;
+
+/**
+ If YES, on successful connect, we will replace the password
+ with the session ID we receive from the server (if provided).
+ If NO, the password will be cached for future reconnects
+ and will not be replaced with a session ID, even if the
+ server provides one.
+ */
+@property (nonatomic) BOOL replacePasswordWithSessionID;
+
+/**
+ If YES, and if replacePasswordWithSessionID is YES, and if
+ we actually receive a session ID from the server, cache
+ the user-provided password for future use before replacing
+ the active password with the session ID.
+ */
+@property (nonatomic) BOOL cachePassword;
+
 @end