etienne-martin / webcrypto.swift Goto Github PK

Hello
I can get hex string from crypted data, but I want to get crypted text.
How can I get crypted text from crypted data?
And how can I convert crypted text to crypted data for decrypt?
Thanks.

I am having issues in trying to handle decryption inside tableview when i have to decrypt and show actual message on the go. As encrypt and decrypt functions are designed with escaping closures, It runs asynchronously and results in empty state of cell.

The wrong hash is returned when hashing Nullam quis risus egét urna mollis ornare vel eu leo. in the web example.

The result is correct in the swift version.

As webkit implementation has its limitations, can we use JavascriptCore framework to implement the same.

After having used CryptoJS for a while I recently tried to implement password hashing on iOS via Swift and gave WebCrypto a try. CryptoJS uses a wordarray when hashing with sha512 and stringify with base64 option gets applied, leading to different results than using any other sha512 hashing method. The output of WebCrypto swift is the same as all other methods so it’s correct, but I wonder if there is any way for this library to replicate the output of CryptoJS, especially since it’s based on CryptoJS Swift.

Is there any way to get the same result from Webcrypto swift with a sha512 like CryptoJS puts out?

Hi Etienne,
I cannot decrypt an AES encrypted string. Here follows the code I wrote:

let code = "6yVJAXlqQGli1wJWlcQoFeQVD/BQR3TDQNJZe1/gQQ5tCN6pRe0gOlAkv1CWTA3ZjXdntMooxI7bm9rphV+DyqGyXRo34Ou38v+GqnSfY5N3m30GH3ieUa20RxdX9cUmtQCxJaDC47C79ybWkFRuXWHmqONVFxXVe4ZqyZBDy+a2zLxLufHEB9mJkH5DEID1d6bcRteONAb7KYbFkJLGbQ=="
          
let input = Data(code.utf8)
let plainPassword="pd$83j@Fs3s13bZP";
let plainIV="aNdh284629324F32";
        
let key = crypto.hexEncodedStringFromData(Data(plainPassword.utf8));
let iv = crypto.hexEncodedStringFromData(Data(plainIV.utf8));
           
self.crypto.decrypt(data: input, key: key, iv: iv, callback: {(decrypted: Data?, error: Error?) in
       print(String(data: decrypted!, encoding: .utf8)!)
})

This is the result that I have executing the above code:

««Ð8ë;xv1t!Õ(öaDM×�#� ?�Ú� §oà�Á�� Ï×j�ë½�ÂÙ'¶Ý¢£ÇKËOU�Tü�v2�\ �-­@�ë3å±gÁý_Ìc°ÃØFZ�@@ö(}Ú HwXSj��±>±èYÆ^ÑÑY^ Õ� ëú&�L�qí]r[ ú ¨3Æ î%�õDÞ£g9|¿ãËÓ{G km'& ÝÕÆïw�/%[¯�j& ;5Åw¡dK ��}·±� 6³�S&�æ6§C �¶óþæþ�0hä
[÷ {¾ç�ñPPîR>Á\5pj�z �Ø$� $Ø_0�Ûýã ÙK ÕÔÓ�½¸.Pþ÷t�ÀÊQ Þ� ¯YÈ@ m�� VzÉɶ:î}Æ6�&ÿàj¬

I wrote the same example in js (you can find the code at https://jsfiddle.net/jwz1dx4a/) and the result is ok:

{"user_info":{"id":4037,"username":"pippo","company_name":"Pippo","license_number":"FK01455-3","password":"pippo123"},"code":"200","msg":"login ok"}

Can you help me out?

Thanks, Vincenzo

You mentioned: WebCrypto.swift supports AES-128, AES-192, and AES-256. It will pick the variant by the size of the key you pass in. If you use a password, AES-256 will be used.

But the content which i want to decrypt is AES 128 ECB pkcs7 with password. How to decrypt with password for 128 bit with your library?

It works perfectly on iOS 10

evaluateJavascript

Hi,

I've noticed that you compare performance to CryptoSwift here: https://github.com/etienne-martin/WebCrypto.swift#performance

I'm concerned about the value: CryptoSwift: 24366ms
I'd like you to ask about the tests you performed as it's significantly higher value than the framework performance tests.

Based on the given test: https://github.com/krzyzanowskim/CryptoSwift/blob/06f3cf38439abed5487dd8b4b30ebc1daa08cb3e/Tests/CryptoSwiftTests/AESTests.swift#L370 (adjusted to 10mb,AES-256), the expected result is more like 753ms on i7 mac.

I assume you performed your test with Debug build, that is unoptimized and expected to be x1000 slower than the Release code. That's the nature of Swift language.

I kindly ask you to update the value or remove the CryptoSwift from the comparison.

Hi, I would like to know how to use the below js method to work in Swift:

let key = "Q8pTgdOC7h25qKVncJlzDA=="
let message = "TestAnitaa009"
let base64Key = CryptoJS.enc.Base64.parse(key);

var iv = base64Key

let encryptedValue = CryptoJS.AES.encrypt(message, base64Key, {
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.Pkcs7,
iv: base64Key
});

//The above code outputs = Oz9b31UvNTW8rFfGUOfB5A==

I tried using this library to help to do the same in Swift. But I am not able to. Any help is appreciated. Thanks a lot

Getting crash on iOS 13 with swiftUI
Working fine with iOS 14

The error occurs when using a password with 40 characters or more.

I tried to use WebCrypto.swift with following example but i am not getting correct decrypted answer, as Encrypted string in given code (input) is "good morning",

let input = "SqPHeh4rWB0zt0cRfv/9uw==" 
let data = Data(input.utf8) 
let key = "password12345678" 
let keydata = Data(key.utf8).base64EncodedString() 
let newKey = crypto.hexEncodedStringFromData(Data(keydata.utf8)) 
let iv = "5D9r9ZVzEYYgha93/aUK2w==" 
let ivdata = Data(iv.utf8).base64EncodedString() 

crypto.decrypt(data: data, key: newKey, iv: ivdata) { (decrypted, error) in 
    if decrypted != nil { 
        print(decrypted!) // I am getting wrong data here 
    }else { 
        print(error!) 
    } 
}

Can you please explain this sample example?