Retrieving password and username from keychainItemWrapper iOS

Question

I'm trying to use the KeychainItemWrapper.h and keychainWrapperItemWrapper.m to store user credentials such as username and password. I currently store when user logs in for the first time like this:

KeychainItemWrapper* keychain = [[KeychainItemWrapper alloc] initWithIdentifier:@"login" accessGroup:nil];
[keychain setObject:_usernameField.text forKey:(__bridge id)kSecValueData];
[keychain setObject:_passwordField.text forKey:(__bridge id)kSecAttrAccount];

This stores the values in keychain. But the next time user opens app I want to retrieve the username and password again. However when i call the following:

NSString *password_ = [keychain objectForKey:(__bridge id)kSecValueData];
NSString *username_ = [keychain objectForKey:(__bridge id)kSecAttrAccount];

It seems i get weird encrypted key such as: <6f78696c 69676874 2d746573 74> Is there any way to retrieve the original strings for username and password? I've never worked with keychain before, any help would be appreciated!

There's nothing obviously wrong with your code, although it looks like somewhere along the way an `NSString` is getting converted to `NSData`. The value `<6f78696c 69676874 2d746573 74>` is the `NSData` equivalent of the `NSString` "oxilight-test". Where did you get `KeychainItemWrapper.h` and how are you integrating it with your project? Are you using CocoaPods? Which version of Xcode are you using? What version of iOS are you using? — idz, Aug 16 '17 at 23:12
Are you using this? - https://gist.github.com/dhoerl/1170641. This script have lots of issues with it. Try some other like - https://koenig-media.raywenderlich.com/uploads/2014/12/KeychainWrapper.zip | https://github.com/vsouza/awesome-ios#keychain — Lal Krishna, Aug 17 '17 at 03:37

score 1 · Answer 1 · answered Jun 14 '18 at 21:16

If you use the wrapper linked above, https://koenig-media.raywenderlich.com/uploads/2014/12/KeychainWrapper.zip. You can set username and password like this. I renamed the methods for myObjectForKey and mySetObject. You can initialize

self.keychainWrapper = [[KeychainWrapper alloc] init];

in your init method.

//save user and password
[self.keychainWrapper setObject:username forKey:(__bridge id)kSecAttrAccount];
[self.keychainWrapper setObject:_password forKey:(__bridgeid)kSecValueData];
[self.keychainWrapper writeToKeychain];

//retrieve username and password
NSString *username = [self.keychainWrapper objectForKey:(__bridge id)kSecAttrAccount];
NSString *password = [self.keychainWrapper objectForKey:(__bridge id)kSecValueData];

score 0 · Answer 2 · answered Jul 14 '21 at 05:00

Why don't use this https://redflowerinc.com/keychain-wrapper-in-objective-c/

NS_ASSUME_NONNULL_BEGIN

@interface KeyChainWrapper : NSObject
+(NSMutableDictionary*) queryDictionary:(NSString*) identifier;
+(NSString*) searchKeychainCopyMatching:(NSString*) identifier;
+(bool) createKeychainValue:(NSString*) value forIdentifier:(NSString*) identifier;
+(bool) updateKeychainValue:(NSString*) password forIdentifier:(NSString*) identifier;
+(void) deleteKeychainValue:(NSString*) identifier;
@end

NS_ASSUME_NONNULL_END

Retrieving password and username from keychainItemWrapper iOS

2 Answers2