是否可以更新钥匙串物品的kSecAttrAccessible值？
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是否可以更新钥匙串中现有项目的属性“ 0”的值？在将商品添加到钥匙串后，似乎无法更改。以下步骤支持我的假设。
向钥匙串添加新项目：
NSData *encodedIdentifier = [@\"BUNDLE_IDENTIFIER\"
dataUsingEncoding:NSUTF8StringEncoding];
NSData *encodedPassword = [@\"PASSWORD\"
dataUsingEncoding:NSUTF8StringEncoding];
// Construct a Keychain item
NSDictionary *keychainItem =
[NSDictionary dictionaryWithObjectsAndKeys:
kSecClassGenericPassword, kSecClass,
encodedIdentifier, kSecAttrGeneric,
encodedIdentifier, kSecAttrService,
@\"USERNAME\", kSecAttrAccount,
kSecAttrAccessibleWhenUnlocked, kSecAttrAccessible,
encodedPassword, kSecValueData
nil];
// Add item to Keychain
OSStatus addItemStatus = SecItemAdd((CFDictionaryRef)keychainItem, NULL);
NSData *encodedIdentifier = [@\"BUNDLE_IDENTIFIER\"
dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *query = [NSDictionary dictionaryWithObjectsAndKeys:
kSecClassGenericPassword, kSecClass,
encodedIdentifier, kSecAttrGeneric,
encodedIdentifier, kSecAttrService,
nil];
NSDictionary *updatedAttributes =
[NSDictionary dictionaryWithObject:kSecAttrAccessibleAfterFirstUnlock
forKey:kSecAttrAccessible];
OSStatus updateItemStatus = SecItemUpdate((CFDictionaryRef)query,
(CFDictionaryRef)updatedAttributes);
没有找到相关结果
已邀请:
2 个回复
艰管垮淮
通过属性要求钥匙串项目的数据来执行属性的更新。根据ADTS，此约束当前未在参考文档中记录。NSData *encodedIdentifier = [@\"BUNDLE_IDENTIFIER\" dataUsingEncoding:NSUTF8StringEncoding]; NSDictionary *query = [NSDictionary dictionaryWithObjectsAndKeys: kSecClassGenericPassword, kSecClass, encodedIdentifier, kSecAttrGeneric, encodedIdentifier, kSecAttrService, nil]; // Obtain the Keychain item\'s data via SecItemCopyMatching() NSData *itemData = ...; NSDictionary *updatedAttributes = [NSDictionary dictionaryWithObjectsAndKeys: kSecAttrAccessibleAfterFirstUnlock, kSecAttrAccessible, (CFDataRef)itemData, kSecValueData, nil]; OSStatus updateItemStatus = SecItemUpdate((CFDictionaryRef)query, (CFDictionaryRef)updatedAttributes); // updateItemStatus should have the value errSecSuccess布埃郝卞簿