InvalidOperationException: Key type not specified. Microsoft.AspNetCore.ApiAuthorization.IdentityServer.ConfigureSigningCredentials.LoadKey()

InvalidOperationException: Key type not specified. Microsoft.AspNetCore.ApiAuthorization.IdentityServer.ConfigureSigningCredentials.LoadKey()

This error occurs when the IdentityServer configuration is missing the key that is required for signing tokens.

To fix this issue, you need to ensure that the necessary signing key is added to the IdentityServer configuration. This key can be added to the appsettings.json file as shown below:

"IdentityServer": {
    "Key": {
      "Type": "Signing",
      "FilePath": "path/to/key-file",
      "Password": "key-password"
    }
}

The FilePath property should point to the file path of the key file, and the Password property should contain the password for the key file if it's protected with a password.

Alternatively, you can configure the key using the ConfigureSigningCredentials method in the ConfigureServices method of the Startup class as shown below:

services.AddIdentityServer()
    .AddApiAuthorization<ApplicationUser, ApplicationDbContext>(options =>
    {
        options.IdentityServerJwt = new IdentityServerJwtOptions
        {
            SigningCredential = new SigningCredentials(new X509SecurityKey(cert), SecurityAlgorithms.RsaSha256)
        };
    });

Here, you need to replace cert with the X509Certificate2 instance that contains the key used for signing.

Examples

  1. How to fix InvalidOperationException with ConfigureSigningCredentials.LoadKey()?

    Description: This query seeks solutions to resolve the InvalidOperationException specifically related to the LoadKey method in the configuration of signing credentials in IdentityServer.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>();

services.AddAuthentication()
        .AddIdentityServerJwt();

  2. Troubleshooting Key type not specified exception in IdentityServer configuration

    Description: This query indicates an attempt to troubleshoot and diagnose issues causing the InvalidOperationException related to key type not being specified during configuration in IdentityServer.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials();

  3. How to specify key type in IdentityServer signing credentials configuration?

    Description: This query suggests the need to understand how to properly specify the key type in the configuration of signing credentials within IdentityServer.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new RsaSecurityKey(RSA.Create());
        });

  4. InvalidOperationException: LoadKey() error in IdentityServer setup

    Description: This query likely indicates an issue encountered during the setup of IdentityServer, resulting in the InvalidOperationException related to LoadKey method.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials();

  5. Common causes of InvalidOperationException in IdentityServer signing credentials

    Description: This query suggests exploring typical reasons behind the InvalidOperationException occurring in the configuration of signing credentials within IdentityServer.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("MySecretKey"));
        });

  6. How to resolve Key type not specified exception in IdentityServer configuration?

    Description: This query indicates a desire to address issues with the InvalidOperationException specifically related to the absence of specified key type in IdentityServer configuration.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new X509SecurityKey(new X509Certificate2("certificate.pfx", "password"));
        });

  7. Understanding IdentityServer signing credentials and key types

    Description: This query suggests a need for understanding the concepts of signing credentials and different key types used in IdentityServer configurations.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new ECDsaSecurityKey(ECDsa.Create());
        });

  8. InvalidOperationException in IdentityServer: LoadKey() method issue

    Description: This query highlights the occurrence of InvalidOperationException specifically in the context of IdentityServer, related to issues with the LoadKey method.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new X509SecurityKey(new X509Certificate2("certificate.pfx", "password"));
        });

  9. Fixing InvalidOperationException: Key type missing in IdentityServer configuration

    Description: This query implies a need to resolve a missing key type issue in the configuration of IdentityServer, resulting in the InvalidOperationException.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new RsaSecurityKey(RSA.Create());
        });

  10. Best practices for configuring signing credentials in IdentityServer

    Description: This query seeks recommendations and best practices for configuring signing credentials effectively in IdentityServer setups.

    services.AddIdentityServer()
        .AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
        .AddSigningCredentials(options =>
        {
            options.Key = new X509SecurityKey(new X509Certificate2("certificate.pfx", "password"));
        });

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