blazor wasm 使用 Cryptography.Algorithms 错误

Question

   Unhandled exception rendering component: System.Security.Cryptography.Algorithms is not supported on this platform.
System.PlatformNotSupportedException: System.Security.Cryptography.Algorithms is not supported on this platform.
   at System.Security.Cryptography.Aes.Create()
   at AutoTradingWebAppV2.Helper.Crypto.Encryptstring(String text, String keyString) in D:\Web\AutoTradingApp-BWASM\AutoTradingWebAppV2\Helper\Crypto.cs:line 12
   at AutoTradingWebAppV2.Handler.CustomUpbitAuthHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) in D:\Web\AutoTradingApp-BWASM\AutoTradingWebAppV2\Handler\CustomUpbitAuthHandler.cs:line 31
   at System.Net.Http.DelegatingHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.<>n__0(HttpRequestMessage request, CancellationToken cancellationToken)
   at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at System.Net.Http.Json.HttpClientJsonExtensions.<GetFromJsonAsyncCore>d__13`1[[System.Collections.Generic.IEnumerable`1[[DTOs.AccountDTO, DTOs, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext()
   at Services.UpbitService.GetAccounts() in D:\Web\AutoTradingApp-BWASM\Services\UpbitService.cs:line 31
   at AppViewModels.UpbitTradingViewModel.GetAccounts() in D:\Web\AutoTradingApp-BWASM\AppViewModels\UpbitTradingViewModel.cs:line 156
   at AutoTradingWebAppV2.Pages.TradingInfoBoard.TryConnectToWebsocket() in D:\Web\AutoTradingApp-BWASM\AutoTradingWebAppV2\Pages\TradingInfoBoard.razor.cs:line 48
   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

https://docs.microsoft.com/en-us/dotnet/core/compatibility/cryptography/5.0/cryptography-apis-not-supported-on-blazor-webassembly

那如何在 blazor 上创建 JWT？还是使用 AES？

如何修复它或他们何时更新 blazor？

            var jwtToken = JwtBuilder.Create()
                                     .WithAlgorithm(new HMACSHA256Algorithm())
                                     .WithSecret(SecretKey)
                                     .AddClaim("access_key",AccessKey)
                                     .AddClaim("nonce", Guid.NewGuid().ToString())
                                     .Encode();
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", jwtToken);

我将此代码添加到 httpclient 处理程序，但不能在 blazor 上使用此代码...

+

这里是公开的API示例代码。我必须在客户端创建 JWT 令牌并将请求发送到 api

C# 代码。

public class OpenAPISample {
    public static void Main() {
        var payload = new JwtPayload
        {
            { "access_key", "Access Key" },
            { "nonce", Guid.NewGuid().ToString() },
            { "query_hash", queryHash },
            { "query_hash_alg", "SHA512" }
        };

        byte[] keyBytes = Encoding.Default.GetBytes("Secret Key");
        var securityKey = new Microsoft.IdentityModel.Tokens.SymmetricSecurityKey(keyBytes);
        var credentials = new Microsoft.IdentityModel.Tokens.SigningCredentials(securityKey, "HS256");
        var header = new JwtHeader(credentials);
        var secToken = new JwtSecurityToken(header, payload);

        var jwtToken = new JwtSecurityTokenHandler().WriteToken(secToken);
        var authorizationToken = "Bearer " + jwtToken;
    }
}

JAVA示例代码（网站中没有C#代码）

 public static void main(String[] args) {
        String accessKey = System.getenv("OPEN_API_ACCESS_KEY");
        String secretKey = System.getenv("OPEN_API_SECRET_KEY");
        String serverUrl = System.getenv("OPEN_API_SERVER_URL");

        Algorithm algorithm = Algorithm.HMAC256(secretKey);
        String jwtToken = JWT.create()
                .withClaim("access_key", accessKey)
                .withClaim("nonce", UUID.randomUUID().toString())
                .sign(algorithm);

        String authenticationToken = "Bearer " + jwtToken;

        try {
            HttpClient client = HttpClientBuilder.create().build();
            HttpGet request = new HttpGet(serverUrl + "/v1/accounts");
            request.setHeader("Content-Type", "application/json");
            request.addHeader("Authorization", authenticationToken);

            HttpResponse response = client.execute(request);
            HttpEntity entity = response.getEntity();

            System.out.println(EntityUtils.toString(entity, "UTF-8"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

Answer 1

how to create JWT at blazor ?

在服务器上创建了一个 JWT。并由客户端应用程序使用。

API 由于技术原因不受支持，但您不应该在客户端上使用它们。您的客户端无法隐藏任何凭据，它只会提供虚假的安全性。

这也适用于 AES。你不能把钥匙藏起来。

they only give me accesskey and secret key and ask me make jwt

您应该在自己的服务器上执行此操作。您的 SPA 客户端调用调用 Open API 服务器的服务器。

确保密钥永远不会在 SPA 客户端中结束。

blazor wasm 使用 Cryptography.Algorithms 错误

blazor wasm using Cryptography.Algorithms Error

cryptography

blazor-webassembly