从keychainItemWrapper iOS检索密码和用户名

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!

Answer 1

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];