Save NSMutableDictionary in iOS Keychain using iOS 6+ - ios6

Question

I am trying to save NSMutableDictionary in iOS keychain using KeychainItemWrapper classes. But I am not able to save it. I am getting error
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Couldn't add the Keychain Item.'
Here is my data to be saved
{
country = USA;
id = 3;
name = "Test User";
photo = "http://www.mydomain.com/images/user1.jpg";
result = true;
"country" = 1;
}
Here is my code
// Call to save
[self storeLoggedInUserInfoInKeychainWithDictionary:dict];
-(void)storeLoggedInUserInfoInKeychainWithDictionary:(NSMutableDictionary*)dict
{
// Save Login Credentials
KeychainItemWrapper* loginUserkeychain = [[KeychainItemWrapper alloc] initWithIdentifier:LOGIN_USER_SERVICE accessGroup:nil];
NSString *error;
[loginUserkeychain setObject:(__bridge id)(kSecAttrAccessibleWhenUnlocked) forKey:(__bridge id)(kSecAttrAccessible)];
NSData *dictionaryRep = [NSPropertyListSerialization dataFromPropertyList:dict format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];
[loginUserkeychain setObject:dictionaryRep forKey:(__bridge id)(kSecValueData)];
}
-(NSMutableDictionary*)fetchLoggedInUserInfoFromKeychain
{
KeychainItemWrapper* loginUserkeychain = [[KeychainItemWrapper alloc] initWithIdentifier:LOGIN_USER_SERVICE accessGroup:nil];
NSString *error;
//When the NSData object object is retrieved from the Keychain, you convert it back to NSDictionary type
NSData *dictionaryRep = [loginUserkeychain objectForKey:(__bridge id)(kSecValueData)];
NSDictionary *dictionary = [NSPropertyListSerialization propertyListFromData:dictionaryRep mutabilityOption:NSPropertyListImmutable format:nil errorDescription:&error];
if (error) {
NSLog(#"%#", error);
}
return [NSMutableDictionary dictionaryWithDictionary:dictionary];
}
-(void)resetLoggedInUserInfoFromKeychain
{
KeychainItemWrapper* loginUserkeychain = [[KeychainItemWrapper alloc] initWithIdentifier:LOGIN_USER_SERVICE accessGroup:nil];
[loginUserkeychain resetKeychainItem];
}
Can anybody tell me whats wrong in above code ?
Thanks in advance.

Answer 1

After few attempts & research using below code I am able to save the data in keychain. If any one is interested can have a look at below code
-(void)storeLoggedInUserInfoInKeychainWithDictionary:(NSMutableDictionary*)dict
{
// Create encoded data
NSData *encodedData= [NSKeyedArchiver archivedDataWithRootObject:dict];
// Create encoded string from data
NSString *encodedString= [encodedData base64EncodedString];
// Save Login Credentials
KeychainItemWrapper* tranxkeychain = [[KeychainItemWrapper alloc] initWithIdentifier:LOGIN_USER_KEYCHAIN accessGroup:nil];
[tranxkeychain setObject:(__bridge id)(kSecAttrAccessibleWhenUnlocked) forKey:(__bridge id)(kSecAttrAccessible)];
[tranxkeychain setObject:LOGIN_USER_SERVICE forKey: (__bridge id)kSecAttrService];
[tranxkeychain setObject:LOGIN_USER_INFO forKey:(__bridge id)(kSecAttrAccount)];
[tranxkeychain setObject:encodedString forKey:(__bridge id)(kSecValueData)];
}
-(NSDictionary*)fetchLoggedInUserInfoFromKeychain
{
KeychainItemWrapper* tranxkeychain = [[KeychainItemWrapper alloc] initWithIdentifier:LOGIN_USER_KEYCHAIN accessGroup:nil];
[tranxkeychain setObject:(__bridge id)(kSecAttrAccessibleWhenUnlocked) forKey:(__bridge id)(kSecAttrAccessible)];
[tranxkeychain setObject:LOGIN_USER_SERVICE forKey: (__bridge id)kSecAttrService];
// Get decoded string
NSString *decodedString=[tranxkeychain objectForKey:(__bridge id)(kSecValueData)];
// Get decoded data
NSData *decodedData= [NSData dataFromBase64String:decodedString];
NSDictionary *dict =[NSKeyedUnarchiver unarchiveObjectWithData:decodedData];
return dict;
}
-(void)resetLoggedInUserInfoFromKeychain
{
KeychainItemWrapper* tranxkeychain = [[KeychainItemWrapper alloc] initWithIdentifier:LOGIN_USER_KEYCHAIN accessGroup:nil];
[tranxkeychain resetKeychainItem];
}