在模拟器中使用SecItemUpdate时出现错误-50
在模拟器中使用SecItemUpdate时出现错误-50
提问于 2015-01-04 21:33:44
有人能告诉我米斯塔克在哪里吗？我现在不知道。
//获取查询Dic
+ (NSMutableDictionary *)keychainQueryDictionary:(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];
}//这里我保存了一些数据到keychain
+ (OSStatus)saveData:(id)data service:(NSString *)serviceIdentify
{
NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
return SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}//删除操作
+ (OSStatus)deleteData:(NSString *)serviceIdentify
{
NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
return SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}//在这里我尝试在keychian中更新一项，但是我得到一个错误-50，但是我不知道哪里是错误的参数
+ (OSStatus)updataData:(id)data service:(NSString *)serviceIdentify
{
NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
[keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
CFDataRef keyData = NULL;
OSStatus status = errSecNotAvailable;
if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
NSMutableDictionary *queryDict = nil;
NSDictionary *ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
queryDict = [NSMutableDictionary dictionaryWithDictionary:ret];
[queryDict setObject:[keychainQuery objectForKey:(__bridge id)kSecClass] forKey:(__bridge id)kSecClass];
NSMutableDictionary *attributesToUpdate = [self keychainQueryDictionary:serviceIdentify];
[attributesToUpdate setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
status = SecItemUpdate((__bridge CFDictionaryRef)queryDict,(__bridge CFDictionaryRef)attributesToUpdate);
}
return status;
}//读取操作
+ (id)loadData:(NSString *)serviceIdentify
{
id ret = nil;
NSMutableDictionary *keychainQuery = [self keychainQueryDictionary:serviceIdentify];
[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) {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
}
return ret;
}回答 1
Stack Overflow用户
发布于 2016-02-06 03:11:48
-50是errSecParam。我认为你已经颠倒了SecItemUpdate的参数。第一个参数是搜索查询，用于查找需要更新的匹配项。这可能应该通过调用您的keychainQueryDictionary方法来创建。第二个参数应该包含更改-在您的示例中，这是您正在做的kSecValueData的新数据，但是字典通常不包括任何搜索属性。在您的示例中，它看起来还包含所有搜索属性，这将导致errSecParam。
另外，还要注意keychainQuery字典中任何不适用于更新的值也会导致errSecParam。如果存在这些值，则可以简单地删除它们，例如：
CFDictionaryRemoveValue(keychainQuery, kSecReturnData);
CFDictionaryRemoveValue(keychainQuery, kSecMatchLimit);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/27766030
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