This question discusses encrypting data on the iPhone使用crypt()函数。作为替代方案,iPhone上是否有钥匙串,如果有,我会使用什么代码来存储登录详细信息,然后在应用程序中为我们检索它们?
答案 0 :(得分:45)
还有一点需要注意:使用iPhone SDK的旧版本(2.x,3.x)时,钥匙串API在模拟器中不起作用。这可以在测试时为您节省很多挫折!
答案 1 :(得分:34)
您可以使用钥匙链 - 对于代码,最好的办法是查看Apple的GenericKeychain示例应用程序:
答案 2 :(得分:8)
我非常喜欢Buzz Anderson's Keychain abstraction layer,我急切等待Jens Alfke's MYCrypto达到可用状态。后者在允许在Mac OS X和iPhone上使用相同的代码方面做得很好,尽管它的功能只模仿了Keychain的一小部分。
答案 3 :(得分:8)
这是我用来存储钥匙串中的键/值对的内容。确保将Security.framework添加到项目中
#import <Security/Security.h>
// -------------------------------------------------------------------------
-(NSString *)getSecureValueForKey:(NSString *)key {
/*
Return a value from the keychain
*/
// Retrieve a value from the keychain
NSDictionary *result;
NSArray *keys = [[[NSArray alloc] initWithObjects: (NSString *) kSecClass, kSecAttrAccount, kSecReturnAttributes, nil] autorelease];
NSArray *objects = [[[NSArray alloc] initWithObjects: (NSString *) kSecClassGenericPassword, key, kCFBooleanTrue, nil] autorelease];
NSDictionary *query = [[NSDictionary alloc] initWithObjects: objects forKeys: keys];
// Check if the value was found
OSStatus status = SecItemCopyMatching((CFDictionaryRef) query, (CFTypeRef *) &result);
[query release];
if (status != noErr) {
// Value not found
return nil;
} else {
// Value was found so return it
NSString *value = (NSString *) [result objectForKey: (NSString *) kSecAttrGeneric];
return value;
}
}
// -------------------------------------------------------------------------
-(bool)storeSecureValue:(NSString *)value forKey:(NSString *)key {
/*
Store a value in the keychain
*/
// Get the existing value for the key
NSString *existingValue = [self getSecureValueForKey:key];
// Check if a value already exists for this key
OSStatus status;
if (existingValue) {
// Value already exists, so update it
NSArray *keys = [[[NSArray alloc] initWithObjects: (NSString *) kSecClass, kSecAttrAccount, nil] autorelease];
NSArray *objects = [[[NSArray alloc] initWithObjects: (NSString *) kSecClassGenericPassword, key, nil] autorelease];
NSDictionary *query = [[[NSDictionary alloc] initWithObjects: objects forKeys: keys] autorelease];
status = SecItemUpdate((CFDictionaryRef) query, (CFDictionaryRef) [NSDictionary dictionaryWithObject:value forKey: (NSString *) kSecAttrGeneric]);
} else {
// Value does not exist, so add it
NSArray *keys = [[[NSArray alloc] initWithObjects: (NSString *) kSecClass, kSecAttrAccount, kSecAttrGeneric, nil] autorelease];
NSArray *objects = [[[NSArray alloc] initWithObjects: (NSString *) kSecClassGenericPassword, key, value, nil] autorelease];
NSDictionary *query = [[[NSDictionary alloc] initWithObjects: objects forKeys: keys] autorelease];
status = SecItemAdd((CFDictionaryRef) query, NULL);
}
// Check if the value was stored
if (status != noErr) {
// Value was not stored
return false;
} else {
// Value was stored
return true;
}
}
值得注意的是,如果用户删除您的应用,则不会删除这些键/值。如果用户删除了您的应用,然后重新安装,则仍可以访问键/值。
答案 4 :(得分:5)
另外请记住,在生成AppID时,如果您希望多个应用程序访问相同的Keychain信息,则必须生成通配符AppID(#####。com.prefix。*)... < / p>
答案 5 :(得分:4)
使用GenericKeychain样本的最新版本1.2 Apple提供了一个也可以在iPhone模拟器上运行的钥匙串包装器。有关详细信息,请参阅此文章:http://dev-metal.blogspot.com/2010/08/howto-use-keychain-in-iphone-sdk-to.html
答案 6 :(得分:0)
以下是格拉诺夫先生的另一个好包装课程 https://github.com/granoff/Lockbox 感谢