forked from aporat/KKPasscodeLock
/
KKKeychain.m
executable file
·103 lines (82 loc) · 3.73 KB
/
KKKeychain.m
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//
// Copyright 2011-2012 Kosher Penguin LLC
// Created by Adar Porat (https://github.com/aporat) on 1/16/2012.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#import "KKKeychain.h"
#import <Security/Security.h>
@implementation KKKeychain
+ (NSString*)appName
{
NSBundle *bundle = [NSBundle bundleForClass:[self class]];
NSString *appName = [bundle objectForInfoDictionaryKey:@"CFBundleDisplayName"];
if (!appName) {
appName = [bundle objectForInfoDictionaryKey:@"CFBundleName"];
}
return appName;
}
+ (BOOL)setString:(NSString*)string forKey:(NSString*)key
{
if (string == nil || key == nil) {
return NO;
}
key = [NSString stringWithFormat:@"%@ - %@", [KKKeychain appName], key];
// First check if it already exists, by creating a search dictionary and requesting that
// nothing be returned, and performing the search anyway.
NSMutableDictionary *existsQueryDictionary = [NSMutableDictionary dictionary];
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
[existsQueryDictionary setObject:(__bridge id)kSecClassGenericPassword forKey:(__bridge id)kSecClass];
// Add the keys to the search dict
[existsQueryDictionary setObject:@"service" forKey:(__bridge id)kSecAttrService];
[existsQueryDictionary setObject:key forKey:(__bridge id)kSecAttrAccount];
OSStatus res = SecItemCopyMatching((__bridge_retained CFDictionaryRef) existsQueryDictionary, NULL);
if (res == errSecItemNotFound) {
if (string != nil) {
NSMutableDictionary *addDict = existsQueryDictionary;
[addDict setObject:data forKey:(__bridge id)kSecValueData];
res = SecItemAdd((__bridge_retained CFDictionaryRef)addDict, NULL);
NSAssert1(res == errSecSuccess, @"Recieved %ld from SecItemAdd!", res);
}
} else if (res == errSecSuccess) {
// Modify an existing one
// Actually pull it now of the keychain at this point.
NSDictionary *attributeDict = [NSDictionary dictionaryWithObject:data forKey:(__bridge id)kSecValueData];
res = SecItemUpdate((__bridge_retained CFDictionaryRef)existsQueryDictionary, (__bridge_retained CFDictionaryRef)attributeDict);
NSAssert1(res == errSecSuccess, @"SecItemUpdated returned %ld!", res);
} else {
NSAssert1(NO, @"Received %ld from SecItemCopyMatching!", res);
}
return YES;
}
+ (NSString*)getStringForKey:(NSString*)key
{
key = [NSString stringWithFormat:@"%@ - %@", [KKKeychain appName], key];
NSMutableDictionary *existsQueryDictionary = [NSMutableDictionary dictionary];
[existsQueryDictionary setObject:(__bridge id)kSecClassGenericPassword forKey:(__bridge id)kSecClass];
// Add the keys to the search dict
[existsQueryDictionary setObject:@"service" forKey:(__bridge id)kSecAttrService];
[existsQueryDictionary setObject:key forKey:(__bridge id)kSecAttrAccount];
// We want the data back!
CFTypeRef data = nil;
[existsQueryDictionary setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
OSStatus res = SecItemCopyMatching((__bridge CFDictionaryRef)existsQueryDictionary, &data);
if (res == errSecSuccess) {
NSString *string = [[NSString alloc] initWithData:(__bridge NSData*)data encoding:NSUTF8StringEncoding];
return string;
} else {
NSAssert1(res == errSecItemNotFound, @"SecItemCopyMatching returned %ld!", res);
}
return nil;
}
@end