为希望使用扩展授权验证器的其他人提供一些代码，作为接受答案的建议选项。
小心，代码又快又脏，必须经过适当的审查。
Here 是一个类似的带有扩展授权验证器的 stackoverflow 答案。
IExtensionGrantValidator
using IdentityServer4.Models;
using IdentityServer4.Validation;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
namespace IdentityService.Logic {
public class TenantExtensionGrantValidator : IExtensionGrantValidator {
public string GrantType => "Tenant";
private readonly ITokenValidator _validator;
private readonly MyUserManager _userManager;
public TenantExtensionGrantValidator(ITokenValidator validator, MyUserManager userManager) {
_validator = validator;
_userManager = userManager;
}
public async Task ValidateAsync(ExtensionGrantValidationContext context) {
String userToken = context.Request.Raw.Get("AccessToken");
String tenantIdRequested = context.Request.Raw.Get("TenantIdRequested");
if (String.IsNullOrEmpty(userToken)) {
context.Result = new GrantValidationResult(TokenRequestErrors.InvalidGrant);
return;
}
var result = await _validator.ValidateAccessTokenAsync(userToken).ConfigureAwait(false);
if (result.IsError) {
context.Result = new GrantValidationResult(TokenRequestErrors.InvalidGrant);
return;
}
if (Guid.TryParse(tenantIdRequested, out Guid tenantId)) {
var sub = result.Claims.FirstOrDefault(c => c.Type == "sub")?.Value;
var claims = result.Claims.ToList();
claims.RemoveAll(x => x.Type == "tenantid");
IEnumerable<Guid> tenantIdsAvailable = await _userManager.GetTenantIds(Guid.Parse(sub)).ConfigureAwait(false);
if (tenantIdsAvailable.Contains(tenantId)) {
claims.Add(new Claim("tenantid", tenantId.ToString()));
var identity = new ClaimsIdentity(claims);
var principal = new ClaimsPrincipal(identity);
context.Result = new GrantValidationResult(principal);
return;
}
}
context.Result = new GrantValidationResult(TokenRequestErrors.InvalidGrant);
}
}
}
客户端配置
new Client {
ClientId = "tenant.client",
ClientSecrets = { new Secret("xxx".Sha256()) },
AllowedGrantTypes = new [] { "Tenant" },
RequireConsent = false,
RequirePkce = true,
AccessTokenType = AccessTokenType.Jwt,
AllowOfflineAccess = true,
AllowedScopes = new List<String> {
IdentityServerConstants.StandardScopes.OpenId,
},
},
客户端中的令牌交换
我创建了一个 razor 页面，它接收请求的租户 ID 作为 url 参数，因为我的测试应用程序是一个 blazor 服务器端应用程序，我在使用新令牌登录时遇到了问题（通过_userStore.StoreTokenAsync）。请注意，我使用IdentityModel.AspNetCore 来管理令牌刷新。这就是我使用 IUserTokenStore 的原因。否则，您将不得不将 httpcontext.signinasync 设置为 Here。
public class TenantSpecificAccessTokenModel : PageModel {
private readonly IUserTokenStore _userTokenStore;
public TenantSpecificAccessTokenModel(IUserTokenStore userTokenStore) {
_userTokenStore = userTokenStore;
}
public async Task OnGetAsync() {
Guid tenantId = Guid.Parse(HttpContext.Request.Query["tenantid"]);
await DoSignInForTenant(tenantId);
}
public async Task DoSignInForTenant(Guid tenantId) {
HttpClient client = new HttpClient();
Dictionary<String, String> parameters = new Dictionary<string, string>();
parameters.Add("AccessToken", await HttpContext.GetUserAccessTokenAsync());
parameters.Add("TenantIdRequested", tenantId.ToString());
TokenRequest tokenRequest = new TokenRequest() {
Address = IdentityProviderConfiguration.Authority + "connect/token",
ClientId = "tenant.client",
ClientSecret = "xxx",
GrantType = "Tenant",
Parameters = parameters
};
TokenResponse tokenResponse = await client.RequestTokenAsync(tokenRequest).ConfigureAwait(false);
if (!tokenResponse.IsError) {
await _userTokenStore.StoreTokenAsync(HttpContext.User, tokenResponse.AccessToken, tokenResponse.ExpiresIn, tokenResponse.RefreshToken);
Response.Redirect(Url.Content("~/").ToString());
}
}
}