android.runtime.JavaProxyThrowable: [System.Security.Cryptography.CryptographicException]: Cryptography_ConcurrentUseNotSupported

[aritchie]

Android framework version

net9.0-android

Affected platform version

.NET 9.0.100, 9.0.102

Description

Trying to perform SHA1 hash with android assembly compression disabled ComputeHash to throw an exception: [System.Security.Cryptography.CryptographicException]: Cryptography_ConcurrentUseNotSupported

Steps to Reproduce

1. Create a blank .net9.0 android application
2. Add msbuild property:

<AndroidEnableAssemblyCompression>false</AndroidEnableAssemblyCompression>

3. Add the following code:

  var hash = sha.ComputeHash(bytes); // will die here
  var hi = Convert.ToHexString(hash);
  Console.WriteLine("SAMPLE HASH: " + hi);

4. Run in release mode
5. Observe logcat for exception (shown in log output field)

Repro Sample: https://github.com/aritchie/android_net9_crypto_crash

Did you find any workaround?

No

Tried the following and causes an crypto loop internal mono crash

#if NET9_0 && ANDROID
this will cause an internal crash with mono
var hash = SHA1.HashData(bytes);
var hi = Convert.ToHexString(hash);
#endif

Relevant log output

ndroid.runtime.JavaProxyThrowable: [System.Security.Cryptography.CryptographicException]: Cryptography_ConcurrentUseNotSupported
02-04 15:00:51.928 I/MonoDroid(30757): 	at System.Security.Cryptography.ConcurrencyBlock.Enter + 0x1a(Unknown Source)
02-04 15:00:51.928 I/MonoDroid(30757): 	at System.Security.Cryptography.HashProviderDispenser+EvpHashProvider.FinalizeHashAndReset + 0x0(Unknown Source)
02-04 15:00:51.928 I/MonoDroid(30757): 	at System.Security.Cryptography.HashProvider.FinalizeHashAndReset + 0x13(Unknown Source)
02-04 15:00:51.928 I/MonoDroid(30757): 	at System.Security.Cryptography.SHA1+Implementation.HashFinal + 0x0(Unknown Source)
02-04 15:00:51.928 I/MonoDroid(30757): 	at System.Security.Cryptography.HashAlgorithm.CaptureHashCodeAndReinitialize + 0x0(Unknown Source)
02-04 15:00:51.928 I/MonoDroid(30757): 	at System.Security.Cryptography.HashAlgorithm.ComputeHash + 0x22(Unknown Source)
02-04 15:00:51.928 I/MonoDroid(30757): 	at Sentry.Internal.Extensions.HashExtensions.GetHashString + 0x11(Unknown Source)

[grendello]

Please record output of logcat using the following steps:

$ adb shell setprop debug.mono.log default,assembly,mono_log_level=debug,mono_log_mask=all
$ adb logcat -G 64M
$ adb logcat -c
# Start the application, wait for it to crash, then wait 5s and:
$ adb logcat -d > log.txt

Please attach the resulting file, thanks!

[aritchie]

@grendello Here is the log as requested: https://github.com/aritchie/android_net9_crypto_crash/blob/main/log.txt