gistfile1.m

/*
This is a convenience class for storing login credentials
This depends on SFHFKeychainUtils from http://github.com/ldandersen/scifihifi-iphone/tree/master/security
and you must add Security.framework to your project 
*/

/**********************************************
//CredentialManager.h 

#import <Foundation/Foundation.h>

@interface CredentialManager : NSObject {}

+ (BOOL) setUserName:(NSString *)userName 
         andPassword:(NSString *)password
          withUpdate:(BOOL)update 
               error:(NSError **) error;

+ (NSString *)getUserName;

+ (NSString *)getPasswordForUserName:(NSString *) userName 
                               error:(NSError **) error;
@end

/**********************************************
//CredentialManager.m

#import "CredentialManager.h"
#import "SFHFKeychainUtils.h"

@implementation CredentialManager

+ (NSString *)getUserName {
    return (NSString *)[[NSUserDefaults standardUserDefaults] objectForKey:@"userName"];
}

+ (BOOL)setUserName:(NSString *) userName 
        andPassword:(NSString *) password 
         withUpdate:(BOOL) update 
              error:(NSError **) error {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setValue:userName forKey:@"userName"];
    [defaults synchronize];
    return [SFHFKeychainUtils storeUsername:userName 
                                andPassword:password
                             forServiceName:@"yourAppName"
                             updateExisting:update 
                                      error:error];
}

+ (NSString *)getPasswordForUserName:(NSString *) userName 
                               error:(NSError **) error {
    return [SFHFKeychainUtils getPasswordForUsername:userName 
                                      andServiceName:@"yourAppName" 
                                               error:error];
}

@end