IL2CPP RSACryptoServiceProvider

Hi guys

Did anyone manage to use RSACryptoServiceProvider with IL2CPP?

The following code results in an exception

public static void SimpleTest()
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(1024);

string message = "SimplerTest";
byte[] unencrypted = Encoding.UTF8.GetBytes(message);
byte[] encrypted = rsa.Encrypt(unencrypted, false);
byte[] decryptedPacket = rsa.Decrypt(encrypted, false);
message = Encoding.UTF8.GetString(decryptedPacket);

DEDebug.Log("Decrypted message = " + message);
}

CryptographicException: PKCS1 decoding error.
at System.Security.Cryptography.HashAlgorithm.ComputeHash (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
at System.Security.Cryptography.RSAPKCS1KeyExchangeDeformatter.SetKey (System.Security.Cryptography.AsymmetricAlgorithm key) [0x00000] in <filename unknown>:0
at System.Globalization.GregorianCalendar.GetYear (DateTime time) [0x00000] in <filename unknown>:0
at System.Security.Cryptography.RSACryptoServiceProvider.Decrypt (System.Byte[] rgb, Boolean fOAEP) [0x00000] in <filename unknown>:0
at RSATest.SimplerTest () [0x00000] in <filename unknown>:0
at RSATest.Start () [0x00000] in <filename unknown>:0


I'd appreciate if anyone could share a workaround if this is a bug that still hasn't been fixed. Thanks!

 

Thanks Josh.

We're using unity 5. When is the expected release date for the next 5.0 patch?

 

Hi again Josh, do you also know of a bug with IL2CPP and System.Security.Cryptography.MD5?

Perhaps this is related as I found that the following code is also not working:

using (System.Security.Cryptography.MD5md5 = System.Security.Cryptography.MD5.Create())
{
hash = BitConverter.ToString(md5.ComputeHash(d)).Replace("-", String.Empty);
}

 

Hi, I've issue with il2cpp in a process using RSACryptoServiceProvider (everything is ok with mono), We are using 4.6.4p4. The status of the bug is still Status: Fixed in future release.
We have not this specific exception, but a nullref after encryption (i'm tracking for more informations).

Did you know if there is still known issues with crypto AES and/or RSA ?

Edit : I found my issue AES.Create() return null;

Bug Id 693259

 

I don't know where to put this so I just put as a reply here.

I'm now using the v4.6.6p2, and I'm STILL encountering this issue.

When I tried to generate iOS project using il2cpp backend, the AES.create() function always return a NullReferenceException.

I'm also surprised that when I googled this problem, I only found very few related posts and for those I found they barely have any solution!!! And they are relatively OLD post (v4.6.2). Isn't that AES encrytion a common practice? Even on the Unity forum, there is very few reports, no fix, no solution.

I don't know if this problem exists in 5.x, but it is not an option for me.

I'm really frustrated now since Apple required the 64-bit support and I can't overcome the encryption problem which I think is pretty important!

So I really wondered if it is due to a bug (which is not solved for MONTHS) or is it a miss use of the function by me (however the code runs perfectly in Mono). If it is a miss use I really want some sort of sample code or work around.

 

The solution I could use at the time was to roll back to Unity 4 and use mono as Apple was still accepting 32-bit binaries until the end of May.

The severity of this problem has now grown to *extreme* as we will not be able to ship our next update which is due soon without this being fixed.

 

Thanks Josh

 

hello
i add 'AesManaged' into link.xml, but still get "CryptographicException: PKCS1 decoding error"
does it not work in 4.6.3? or i miss something?
thank you