I have a login-screen in my iOS app.
The username and password will be saved in the NSUserDefaults
and be loaded into the login-screen again when you enter the
try this one:
KeychainItemWrapper *keychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"YourAppLogin" accessGroup:nil];
[keychainItem setObject:@"password you are saving" forKey:kSecValueData];
[keychainItem setObject:@"username you are saving" forKey:kSecAttrAccount];
may it will help.
I decided to answer how to use keychain in iOS 8 using Obj-C and ARC.
1)I used the keychainItemWrapper (ARCifief version) from GIST: https://gist.github.com/dhoerl/1170641/download - Add (+copy) the KeychainItemWrapper.h and .m to your project
2) Add the Security framework to your project (check in project > Build phases > Link binary with Libraries)
3) Add the security library (#import ) and KeychainItemWrapper (#import "KeychainItemWrapper.h") to the .h and .m file where you want to use keychain.
4) To save data to keychain:
NSString *emailAddress = self.txtEmail.text;
NSString *password = self.txtPasword.text;
//because keychain saves password as NSData object
NSData *pwdData = [password dataUsingEncoding:NSUTF8StringEncoding];
//Save item
self.keychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"YourAppLogin" accessGroup:nil];
[self.keychainItem setObject:emailAddress forKey:(__bridge id)(kSecAttrAccount)];
[self.keychainItem setObject:pwdData forKey:(__bridge id)(kSecValueData)];
5) Read data (probably login screen on loading > viewDidLoad):
self.keychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"YourAppLogin" accessGroup:nil];
self.txtEmail.text = [self.keychainItem objectForKey:(__bridge id)(kSecAttrAccount)];
//because label uses NSString and password is NSData object, conversion necessary
NSData *pwdData = [self.keychainItem objectForKey:(__bridge id)(kSecValueData)];
NSString *password = [[NSString alloc] initWithData:pwdData encoding:NSUTF8StringEncoding];
self.txtPassword.text = password;
Enjoy!
You should always use Keychain to store usernames and passwords, and since it's stored securely and only accessible to your app, there is no need to delete it when app quits (if that was your concern).
Apple provides sample code that stores, reads and deletes keychain items and here is how to use the keychain wrapper class from that sample which greatly simplifies using Keychain.
Include Security.framework (in Xcode 3 right-click on frameworks folder and add existing framework. In Xcode 4 select your project, then select target, go to Build Phases tab and click + under Link Binary With Files) and KeychainItemWrapper .h & .m files into your project, #import the .h file wherever you need to use keychain and then create an instance of this class:
KeychainItemWrapper *keychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"YourAppLogin" accessGroup:nil];
(YourAppLogin can be anything you chose to call your Keychain item and you can have multiple items if required)
Then you can set the username and password using:
[keychainItem setObject:@"password you are saving" forKey:kSecValueData];
[keychainItem setObject:@"username you are saving" forKey:kSecAttrAccount];
Get them using:
NSString *password = [keychainItem objectForKey:kSecValueData];
NSString *username = [keychainItem objectForKey:kSecAttrAccount];
Or delete them using:
[keychainItem resetKeychainItem];
I looked at using KeychainItemWrapper (the ARC version) but I didn't find its Objective C wrapper as wholesome as desired.
I used this solution by Kishikawa Katsumi, which meant I wrote less code and didn't have to use casts to store NSString values.
Two examples of storing:
[UICKeyChainStore setString:@"kishikawakatsumi" forKey:@"username"];
[UICKeyChainStore setString:@"P455_w0rd$1$G$Z$" forKey:@"password"];
Two examples of retrieving
UICKeyChainStore *store = [UICKeyChainStore keyChainStore];
// or
UICKeyChainStore *store = [UICKeyChainStore keyChainStoreWithService:@"YOUR_SERVICE"];
NSString *username = [store stringForKey:@"username"];
NSString *password = [store stringForKey:@"password"];
A very easy solution via Keychains.
It's a simple wrapper for the system Keychain. Just add the SSKeychain.h
, SSKeychain.m
, SSKeychainQuery.h
and SSKeychainQuery.m
files to your project and add the Security.framework to your target.
To save a password:
[SSKeychain setPassword:@"AnyPassword" forService:@"AnyService" account:@"AnyUser"]
To retrieve a password:
NSString *password = [SSKeychain passwordForService:@"AnyService" account:@"AnyUser"];
Where setPassword
is what value you want saved and forService
is what variable you want it saved under and account is for what user/object the password and any other info is for.
If you need an ARC version of the wrapper here is the link https://gist.github.com/1170641 Thanks to