枚举我的iOS应用程序中的所有钥匙串项目

Question

以编程方式（从我的应用程序中）获取存储在钥匙串中的所有项目的最简单方法是什么？

它可能与SecItemCopyMatching（）有关，但该函数的文档不是很清楚（我没有找到一个体面的样本在网上）。

Answer 1

SecItemCopyMatching是正确的要求。首先，我们建立我们的查询字典，使得项目属性在字典回来了，这个返回的所有项目：

NSMutableDictionary *query = [NSMutableDictionary dictionaryWithObjectsAndKeys: 
    (__bridge id)kCFBooleanTrue, (__bridge id)kSecReturnAttributes, 
    (__bridge id)kSecMatchLimitAll, (__bridge id)kSecMatchLimit, 
    nil]; 

由于SecItemCopyMatching至少需要类返回SecItem S的，我们创造了所有的数组类...

NSArray *secItemClasses = [NSArray arrayWithObjects: 
          (__bridge id)kSecClassGenericPassword, 
          (__bridge id)kSecClassInternetPassword, 
          (__bridge id)kSecClassCertificate, 
          (__bridge id)kSecClassKey, 
          (__bridge id)kSecClassIdentity, 
          nil]; 

...并为每个类，设置类在我们的查询，请致电SecItemCopyMatching，并记录结果。

for (id secItemClass in secItemClasses) { 
    [query setObject:secItemClass forKey:(__bridge id)kSecClass]; 

    CFTypeRef result = NULL; 
    SecItemCopyMatching((__bridge CFDictionaryRef)query, &result); 
    NSLog(@"%@", (__bridge id)result); 
    if (result != NULL) CFRelease(result); 
} 

在生产代码中，你应该检查由SecItemCopyMatching返回OSStatus或者是errSecItemNotFound或errSecSuccess（找不到项目）（至少一个项目被发现）。

Answer 2

斯威夫特3+版本，还返回键（kSecAttrAccount）：

open func getAllKeyChainItemsOfClass(_ secClass: String) -> [String:String] { 

     var query: [String: Any] = [ 
      kSecClass : secClass, 
      kSecReturnData : kCFBooleanTrue, 
      kSecReturnAttributes : kCFBooleanTrue, 
      kSecReturnRef : kCFBooleanTrue, 
      kSecMatchLimit : kSecMatchLimitAll 
     ] 

     var result: AnyObject? 

     let lastResultCode = withUnsafeMutablePointer(to: &result) { 
      SecItemCopyMatching(query as CFDictionary, UnsafeMutablePointer($0)) 
     } 

     var values = [String:String]() 
     if lastResultCode == noErr { 
      let array = result as? Array<Dictionary<String, Any>> 

      for item in array! { 
       if let key = item[kSecAttrAccount] as? String, 
        let value = item[kSecValueData] as? Data { 
        values[key] = String(data: value, encoding:.utf8) 
       } 
      } 
     } 

     return values 
    } 

Answer 3

斯威夫特3版和Xcode 9.1

func getAllKeyChainItemsOfClass(_ secClass: String) -> [String:String] { 

    var query: [String: Any] = [ 
     kSecClass as String : secClass, 
     kSecReturnData as String : kCFBooleanTrue, 
     kSecReturnAttributes as String : kCFBooleanTrue, 
     kSecReturnRef as String : kCFBooleanTrue, 
     kSecMatchLimit as String : kSecMatchLimitAll 
    ] 

    var result: AnyObject? 

    let lastResultCode = withUnsafeMutablePointer(to: &result) { 
     SecItemCopyMatching(query as CFDictionary, UnsafeMutablePointer($0)) 
    } 

    var values = [String:String]() 
    if lastResultCode == noErr { 
     let array = result as? Array<Dictionary<String, Any>> 

     for item in array! { 
      if let key = item[kSecAttrAccount as String] as? String, 
       let value = item[kSecValueData as String] as? Data { 
       values[key] = String(data: value, encoding:.utf8) 
      } 
     } 
    } 

    return values 
} 

可以这样调用：

debugPrint(getAllKeyChainItemsOfClass(kSecClassGenericPassword as String))