在iOS中保存电子邮件/密码到钥匙串
我对iOS开发非常陌生,所以请原谅我,如果这是一个新手问题。我有一个简单的身份验证机制来接收用户的电子邮件地址和密码。我也有一个开关说'记住我'。如果用户切换开关,我想保留他们的电子邮件/密码,以便将来可以自动填充这些字段。在iOS中保存电子邮件/密码到钥匙串
我已经得到这个工作与保存到plist文件,但我知道这不是最好的主意,因为密码是未加密的。我发现了一些用于保存钥匙串的示例代码,但说实话,我有点迷路。对于下面的功能,我不知道如何调用它以及如何修改它以保存电子邮件地址。
我猜打电话给那就是:saveString(@"passwordgoeshere");
感谢您的帮助!
+ (void)saveString:(NSString *)inputString forKey:(NSString *)account {
NSAssert(account != nil, @"Invalid account");
NSAssert(inputString != nil, @"Invalid string");
NSMutableDictionary *query = [NSMutableDictionary dictionary];
[query setObject:(id)kSecClassGenericPassword forKey:(id)kSecClass];
[query setObject:account forKey:(id)kSecAttrAccount];
[query setObject:(id)kSecAttrAccessibleWhenUnlocked forKey:(id)kSecAttrAccessible];
OSStatus error = SecItemCopyMatching((CFDictionaryRef)query, NULL);
if (error == errSecSuccess) {
// do update
NSDictionary *attributesToUpdate = [NSDictionary dictionaryWithObject:[inputString dataUsingEncoding:NSUTF8StringEncoding]
forKey:(id)kSecValueData];
error = SecItemUpdate((CFDictionaryRef)query, (CFDictionaryRef)attributesToUpdate);
NSAssert1(error == errSecSuccess, @"SecItemUpdate failed: %d", error);
} else if (error == errSecItemNotFound) {
// do add
[query setObject:[inputString dataUsingEncoding:NSUTF8StringEncoding] forKey:(id)kSecValueData];
error = SecItemAdd((CFDictionaryRef)query, NULL);
NSAssert1(error == errSecSuccess, @"SecItemAdd failed: %d", error);
} else {
NSAssert1(NO, @"SecItemCopyMatching failed: %d", error);
}
}
我写了一个简单的包装,允许任何符合NSCoding的对象保存到钥匙串中。例如,您可以将您的电子邮件和密码存储在NSDictionary中,并使用此类将NSDictionary存储到钥匙串中。
SimpleKeychain.h
#import <Foundation/Foundation.h>
@class SimpleKeychainUserPass;
@interface SimpleKeychain : NSObject
+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)delete:(NSString *)service;
@end
SimpleKeychain.m
#import "SimpleKeychain.h"
@implementation SimpleKeychain
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(id)kSecClassGenericPassword, (id)kSecClass,
service, (id)kSecAttrService,
service, (id)kSecAttrAccount,
(id)kSecAttrAccessibleAfterFirstUnlock, (id)kSecAttrAccessible,
nil];
}
+ (void)save:(NSString *)service data:(id)data {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((CFDictionaryRef)keychainQuery);
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];
SecItemAdd((CFDictionaryRef)keychainQuery, NULL);
}
+ (id)load:(NSString *)service {
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];
[keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(NSData *)keyData];
}
@catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@", service, e);
}
@finally {}
}
if (keyData) CFRelease(keyData);
return ret;
}
+ (void)delete:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((CFDictionaryRef)keychainQuery);
}
@end
ARC准备代码:
KeychainUserPass.h
#import <Foundation/Foundation.h>
@interface KeychainUserPass : NSObject
+ (void)save:(NSString *)service data:(id)data;
+ (id)load:(NSString *)service;
+ (void)delete:(NSString *)service;
@end
KeychainUserPass.m
#import "KeychainUserPass.h"
@implementation KeychainUserPass
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(__bridge id)kSecClassGenericPassword, (__bridge id)kSecClass,
service, (__bridge id)kSecAttrService,
service, (__bridge id)kSecAttrAccount,
(__bridge id)kSecAttrAccessibleAfterFirstUnlock, (__bridge id)kSecAttrAccessible,
nil];
}
+ (void)save:(NSString *)service data:(id)data {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}
+ (id)load:(NSString *)service {
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
[keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
}
@catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@", service, e);
}
@finally {}
}
if (keyData) CFRelease(keyData);
return ret;
}
+ (void)delete:(NSString *)service {
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}
@end
感谢您使用ARC准备好版本。它像一个魅力。 – 2013-12-07 05:34:30
不是问题:) – 2013-12-07 08:56:49
完美无缺,thx! – mnl 2014-07-21 12:59:06
我固定@失范的代码与ARC工作,并把它在Github上(我链接到这个答案,并在这两个文件中提到你的用户,但如果你想了解更多的归因,请让我知道)。我也改变了一些格式,使得方法名称更通用一些。 https://github.com/jeremangnr/JNKeychain – jere 2013-05-13 15:37:22