ROPC流程尝试执行userrealm发现并失败

Question

我正在尝试使用MSAL来使用B2C ROPC流获取访问令牌。但是，它未能尝试使用常规AAD（而非B2C）用户域发现，这显然会因用户ID没有域而失败。

Fiddler表明MSAL执行的一个调用是：https://login.microsoftonline.com/common/userrealm/user1?api-version=1.0。注意'user1'，它是B2C中的有效用户ID但不是AAD中的有效用户ID。

            Authority = "https://login.microsoftonline.com/tfp/mrochonb2cprod.onmicrosoft.com/B2C_1_ROP/.well-known/openid-configuration";
            var pwd = new SecureString();
            foreach (var c in "...") pwd.AppendChar(c);
            var app = PublicClientApplicationBuilder
                .Create(ClientId)
                    .WithB2CAuthority(Authority)
                        .Build();
            var ar = await app.AcquireTokenByUsernamePasswordAsync(Scopes, "user1", pwd);

Answer 1

我已经与Microsoft工程师确认了这一点。目前他们没有使用B2C用户测试MSAL aquiretokenusernamepassword()方法，并且没有这样的样本。此功能已公开预览。他们使用AppAuth for iOS和AppAuth for Android在生产中广泛测试了这一流程。你可以找到更多细节here。

但是ropc流程工作正常，你可以使用post请求。

POST /yourtenant.onmicrosoft.com/oauth2/v2.0/token?p=B2C_1_ROPC_Auth HTTP/1.1
Host: yourtenant.b2clogin.com
Content-Type: application/x-www-form-urlencoded

username=leadiocl%40trashmail.ws&password=Passxword1&grant_type=password&scope=openid+bef22d56-552f-4a5b-b90a-1988a7d634ce+offline_access&client_id=bef22d56-552f-4a5b-b90a-1988a7d634ce&response_type=token+id_token


{ 
    "access_token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ik9YQjNhdTNScWhUQWN6R0RWZDM5djNpTmlyTWhqN2wxMjIySnh6TmgwRlkifQ.eyJpc3MiOiJodHRwczovL3RlLmNwaW0ud2luZG93cy5uZXQvZjA2YzJmZTgtNzA5Zi00MDMwLTg1ZGMtMzhhNGJmZDllODJkL3YyLjAvIiwiZXhwIjoxNTEzMTMwMDc4LCJuYmYiOjE1MTMxMjY0NzgsImF1ZCI6ImJlZjIyZDU2LTU1MmYtNGE1Yi1iOTBhLTE5ODhhN2Q2MzRjZSIsIm9pZCI6IjNjM2I5NjljLThjNDktNGUxMS1hNGVmLWZkYjJmMzkyZjA0OSIsInN1YiI6Ik5vdCBzdXBwb3J0ZWQgY3VycmVudGx5LiBVc2Ugb2lkIGNsYWltLiIsImF6cCI6ImJlZjIyZDU2LTU1MmYtNGE1Yi1iOTBhLTE5ODhhN2Q2MzRjZSIsInZlciI6IjEuMCIsImlhdCI6MTUxMzEyNjQ3OH0.MSEThYZxCS4SevBw3-3ecnVLUkucFkehH-gH-P7SFcJ-MhsBeQEpMF1Rzu_R9kUqV3qEWKAPYCNdZ3_P4Dd3a63iG6m9TnO1Vt5SKTETuhVx3Xl5LYeA1i3Slt9Y7LIicn59hGKRZ8ddrQzkqj69j723ooy01amrXvF6zNOudh0acseszt7fbzzofyagKPerxaeTH0NgyOinLwXu0eNj_6RtF9gBfgwVidRy9OzXUJnqm1GdrS61XUqiIUtv4H04jYxDem7ek6E4jsH809uSXT0iD5_4C5bDHrpO1N6pXSasmVR9GM1XgfXA_IRLFU4Nd26CzGl1NjbhLnvli2qY4A", 
    "token_type": "Bearer", 
    "expires_in": "3600", 
    "refresh_token": "eyJraWQiOiJacW9pQlp2TW5pYVc2MUY0TnlfR3REVk1EVFBLbUJLb0FUcWQ1ZWFja1hBIiwidmVyIjoiMS4wIiwiemlwIjoiRGVmbGF0ZSIsInNlciI6IjEuMCJ9.aJ_2UW14dh4saWTQ0jLJ7ByQs5JzIeW_AU9Q_RVFgrrnYiPhikEc68ilvWWo8B20KTRB_s7oy_Eoh5LACsqU6Oz0Mjnh0-DxgrMblUOTAQ9dbfAT5WoLZiCBJIz4YT5OUA_RAGjhBUkqGwdWEumDExQnXIjRSeaUBmWCQHPPguV1_5wSj8aW2zIzYIMbofvpjwIATlbIZwJ7ufnLypRuq_MDbZhJkegDw10KI4MHJlJ40Ip8mCOe0XeJIDpfefiJ6WQpUq4zl06NO7j8kvDoVq9WALJIao7LYk_x9UIT-3d0W0eDBHGSRcNgtMYpymaN9ltx6djcEesXNn4CFnWG3g.y6KKeA9EcsW9zW-g.TrTSgn4WBt18gezegxihBla9SLSTC3YfDROQsL9K4yX4400FKlTlf-2l9CnpGTEdWXVi7sIMHCl8S4oUiXd-rvY2mn_NfDrbbVJfgKp1j7Nnq9FFyeJEFcP_FtUXgsNTG9iwfzWox04B1d845qNRWiS9N8BhAAAIdz5N0ChHuOxsVOC0Y_Ly3DNe-JQyXcq964M6-jp3cgi4UqMxT837L6pLY5Ih_iPsSfyHzstsFeqyUIktnzt1MpTlyW-_GDyFK1S-SyV8PPQ7phgFouw2jho1iboHX70RlDGYyVmP1CfQzKE_zWxj3rgaCZvYMWN8fUenoiatzhvWkUM7dhqKGjofPeL8rOMkhl6afLLjObzhUg3PZFcMR6guLjQdEwQFufWxGjfpvaHycZSKeWu6-7dF8Hy_nyMLLdBpUkdrXPob_5gRiaH72KvncSIFvJLqhY3NgXO05Fy87PORjggXwYkhWh4FgQZBIYD6h0CSk2nfFjR9uD9EKiBBWSBZj814S_Jdw6HESFtn91thpvU3hi3qNOi1m41gg1vt5Kh35A5AyDY1J7a9i_lN4B7e_pknXlVX6Z-Z2BYZvwAU7KLKsy5a99p9FX0lg6QweDzhukXrB4wgfKvVRTo.mjk92wMk-zUSrzuuuXPVeg", 
    "id_token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ik9YQjNhdTNScWhUQWN6R0RWZDM5djNpTmlyTWhqN2wxMjIySnh6TmgwRlkifQ.eyJleHAiOjE1MTMxMzAwNzgsIm5iZiI6MTUxMzEyNjQ3OCwidmVyIjoiMS4wIiwiaXNzIjoiaHR0cHM6Ly90ZS5jcGltLndpbmRvd3MubmV0L2YwNmMyZmU4LTcwOWYtNDAzMC04NWRjLTM4YTRiZmQ5ZTgyZC92Mi4wLyIsInN1YiI6Ik5vdCBzdXBwb3J0ZWQgY3VycmVudGx5LiBVc2Ugb2lkIGNsYWltLiIsImF1ZCI6ImJlZjIyZDU2LTU1MmYtNGE1Yi1iOTBhLTE5ODhhN2Q2MzRjZSIsImFjciI6ImIyY18xYV9yZXNvdXJjZW93bmVydjIiLCJpYXQiOjE1MTMxMjY0NzgsImF1dGhfdGltZSI6MTUxMzEyNjQ3OCwib2lkIjoiM2MzYjk2OWMtOGM0OS00ZTExLWE0ZWYtZmRiMmYzOTJmMDQ5IiwiYXRfaGFzaCI6Ikd6QUNCTVJtcklwYm9OdkFtNHhMWEEifQ.iAJg13cgySsdH3cmoEPGZB_g-4O8KWvGr6W5VzRXtkrlLoKB1pl4hL6f_0xOrxnQwj2sUgW-wjsCVzMc_dkHSwd9QFZ4EYJEJbi1LMGk2lW-PgjsbwHPDU1mz-SR1PeqqJgvOqrzXo0YHXr-e07M4v4Tko-i_OYcrdJzj4Bkv7ZZilsSj62lNig4HkxTIWi5Ec2gD79bPKzgCtIww1KRnwmrlnCOrMFYNj-0T3lTDcXAQog63MOacf7OuRVUC5k_IdseigeMSscrYrNrH28s3r0JoqDhNUTewuw1jx0X6gdqQWZKOLJ7OF_EJMP-BkRTixBGK5eW2YeUUEVQxsFlUg" 
}

Answer 2

MSAL.NET v3.0.5-preview+使用ROPC流程与B2C合作。有关使用MSAL的更多信息，请参阅此section of the MSAL.NET wiki。