[BUG] The specified nonce is not a valid size for this algorithm.

[madanstc]

Bug Report Checklist
Have you provided a code sample to reproduce the issue?
Have you tested with the latest release to confirm the issue still exists?
Have you searched for related issues/PRs?
What's the actual output vs expected output?
Description
I am having an issue when trying to decrypt using the payload encryption library C# is not able to decrypt the payload with a Private Key. This is with Mastercard PTS sandbox kit.

Payload Encryption Flows:

• C# encrypt request -> Mastercard > C# decrypt response

This flow fails every time on the C# decrypt response, Java has no issues C# seems to not be able to decrypt it

Stack:

Mastercard.Developer.ClientEncryption.Core.Encryption.EncryptionException: Payload decryption failed!
---> System.ArgumentException: The specified nonce is not a valid size for this algorithm. (Parameter 'nonce')
at System.Security.Cryptography.AesGcm.CheckParameters(ReadOnlySpan1 plaintext, ReadOnlySpan1 ciphertext, ReadOnlySpan1 nonce, ReadOnlySpan1 tag)
at System.Security.Cryptography.AesGcm.Decrypt(Byte[] nonce, Byte[] ciphertext, Byte[] tag, Byte[] plaintext, Byte[] associatedData)
at Mastercard.Developer.ClientEncryption.Core.Encryption.AES.AesGcm.Decrypt(Byte[] secretKeyBytes, JweObject jweObject) in C:\Users\MohamedAShaheedMadan\source\repos\stcpay-middleware-dotnet\StcPay.Middleware\Common\Mastercard.Developer.ClientEncryption.Core\Encryption\AES\AesGcm.cs:line 33
at Mastercard.Developer.ClientEncryption.Core.Encryption.JWE.JweObject.Decrypt(JweConfig config) in C:\Users\MohamedAShaheedMadan\source\repos\stcpay-middleware-dotnet\StcPay.Middleware\Common\Mastercard.Developer.ClientEncryption.Core\Encryption\JWE\JweObject.cs:line 38
at Mastercard.Developer.ClientEncryption.Core.Encryption.JWE.JweEncryption.DecryptPayloadPath(JToken payload, String jsonPathIn, String jsonPathOut, JweConfig config) in C:\Users\MohamedAShaheedMadan\source\repos\stcpay-middleware-dotnet\StcPay.Middleware\Common\Mastercard.Developer.ClientEncryption.Core\Encryption\JWE\JweEncryption.cs:line 77
at Mastercard.Developer.ClientEncryption.Core.Encryption.JWE.JweEncryption.DecryptPayload(String payload, JweConfig config) in C:\Users\MohamedAShaheedMadan\source\repos\stcpay-middleware-dotnet\StcPay.Middleware\Common\Mastercard.Developer.ClientEncryption.Core\Encryption\JWE\JweEncryption.cs:line 50
--- End of inner exception stack trace ---
at Mastercard.Developer.ClientEncryption.Core.Encryption.JWE.JweEncryption.DecryptPayload(String payload, JweConfig config) in C:\Users\MohamedAShaheedMadan\source\repos\stcpay-middleware-dotnet\StcPay.Middleware\Common\Mastercard.Developer.ClientEncryption.Core\Encryption\JWE\JweEncryption.cs:line 56
at PTSCommunicationWarper.Controllers.PTSCommController.Decrypt(EncryptRequest request) in C:\Users\MohamedAShaheedMadan\source\repos\stcpay-middleware-dotnet\StcPay.Middleware\PTSCommunicationWarper\Controllers\PTSCommController.cs:line 76
at lambda_method1(Closure , Object , Object[] )
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

To Reproduce:

var config = JweConfigBuilder.AJweEncryptionConfig()
.WithEncryptionCertificate(encryptionCertificate)
.WithDecryptionKey(decryptionKey).WithEncryptionPath("$", "$").WithDecryptionPath("$.encryptedValue", "$").WithEncryptedValueFieldName(encryptedValueFieldName: "encryptedValue")
.Build();
var dec = JweEncryption.DecryptPayload(response.Body, config);

Related issues/PRs
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Suggest a fix/enhancement
If you can't fix the bug yourself, perhaps you can point to what might be causing the problem (line of code or commit), or simply make a suggestion.

If this is a Feature request, please check out this.

[ShimonaR-MC]

Hi @madanstc, may I ask if you are still facing this issue?