1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
//
// FXKeychain.m
//
// Version 1.3.2
//
// Created by Nick Lockwood on 29/12/2012.
// Copyright 2012 Charcoal Design
//
// Distributed under the permissive zlib License
// Get the latest version from here:
//
// https://github.com/nicklockwood/FXKeychain
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
#import "FXKeychain.h"
#import <Availability.h>
#if !__has_feature(objc_arc)
#error This class requires automatic reference counting
#endif
@implementation FXKeychain
+ (instancetype)defaultKeychain
{
static id sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
NSString *bundleID = [[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleIdentifierKey];
sharedInstance = [[FXKeychain alloc] initWithService:bundleID
accessGroup:nil];
});
return sharedInstance;
}
- (id)init
{
return [self initWithService:nil accessGroup:nil];
}
- (id)initWithService:(NSString *)service
accessGroup:(NSString *)accessGroup
{
if ((self = [super init]))
{
_service = [service copy];
_accessGroup = [accessGroup copy];
}
return self;
}
- (BOOL)setObject:(id)object forKey:(id)key
{
NSParameterAssert(key);
//generate query
NSMutableDictionary *query = [NSMutableDictionary dictionary];
if ([_service length]) query[(__bridge NSString *)kSecAttrService] = _service;
query[(__bridge NSString *)kSecClass] = (__bridge id)kSecClassGenericPassword;
query[(__bridge NSString *)kSecAttrAccount] = [key description];
#if defined __IPHONE_OS_VERSION_MAX_ALLOWED && !TARGET_IPHONE_SIMULATOR
if ([_accessGroup length]) query[(__bridge NSString *)kSecAttrAccessGroup] = _accessGroup;
#endif
//encode object
NSData *data = nil;
NSError *error = nil;
if ([(id)object isKindOfClass:[NSString class]])
{
data = [(NSString *)object dataUsingEncoding:NSUTF8StringEncoding];
}
else if (object)
{
data = [NSPropertyListSerialization dataWithPropertyList:object
format:NSPropertyListBinaryFormat_v1_0
options:0
error:&error];
}
//fail if object is invalid
NSAssert(!object || (object && data), @"FXKeychain failed to encode object for key '%@', error: %@", key, error);
//delete existing data
#if __IPHONE_4_0 && TARGET_OS_IPHONE
OSStatus status = SecItemDelete((__bridge CFDictionaryRef)query);
#else
CFTypeRef result;
[query setObject:(__bridge id)kCFBooleanTrue forKey:(__bridge id)kSecReturnRef];
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &result);
if (status == errSecSuccess) {
status = SecKeychainItemDelete((SecKeychainItemRef) result);
CFRelease(result);
}
#endif
//write data
if (data)
{
query[(__bridge NSString *)kSecValueData] = data;
status = SecItemAdd ((__bridge CFDictionaryRef)query, NULL);
if (status != errSecSuccess)
{
NSLog(@"FXKeychain failed to store data for key '%@', error: %ld", key, (long)status);
return NO;
}
}
else if (status != errSecSuccess)
{
NSLog(@"FXKeychain failed to delete data for key '%@', error: %ld", key, (long)status);
return NO;
}
return YES;
}
- (BOOL)setObject:(id)object forKeyedSubscript:(id)key
{
return [self setObject:object forKey:key];
}
- (BOOL)removeObjectForKey:(id)key
{
return [self setObject:nil forKey:key];
}
- (id)objectForKey:(id)key
{
NSParameterAssert(key);
//generate query
NSMutableDictionary *query = [NSMutableDictionary dictionary];
if ([_service length]) query[(__bridge NSString *)kSecAttrService] = _service;
query[(__bridge NSString *)kSecClass] = (__bridge id)kSecClassGenericPassword;
query[(__bridge NSString *)kSecMatchLimit] = (__bridge id)kSecMatchLimitOne;
query[(__bridge NSString *)kSecReturnData] = (__bridge id)kCFBooleanTrue;
query[(__bridge NSString *)kSecAttrAccount] = [key description];
#if defined __IPHONE_OS_VERSION_MAX_ALLOWED && !TARGET_IPHONE_SIMULATOR
if ([_accessGroup length]) query[(__bridge NSString *)kSecAttrAccessGroup] = _accessGroup;
#endif
//recover data
id object = nil;
NSError *error = nil;
CFDataRef data = nil;
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, (CFTypeRef *)&data);
if (status == errSecSuccess && data)
{
//attempt to decode as a plist
object = [NSPropertyListSerialization propertyListWithData:(__bridge NSData *)data
options:NSPropertyListImmutable
format:NULL
error:&error];
if ([object respondsToSelector:@selector(objectForKey:)] && object[@"$archiver"])
{
//data represents an NSCoded archive. don't trust it
object = nil;
}
else if (!object)
{
//may be a string
object = [[NSString alloc] initWithData:(__bridge NSData *)data encoding:NSUTF8StringEncoding];
}
if (!object)
{
NSLog(@"FXKeychain failed to decode data for key '%@', error: %@", key, error);
}
CFRelease(data);
return object;
}
else
{
//no value found
return nil;
}
}
- (id)objectForKeyedSubscript:(id)key
{
return [self objectForKey:key];
}
@end
|
