HTTPWebRequest Could not create SSL/TLS secure channel

Question

I am trying to call a Web API using HttpWebRequest(Console Application). To upload the file, I am using the code snippet provided by @Cristian Romanescu ont this question Upload files with HTTPWebrequest (multipart/form-data)

If I set the req.ProtocolVersion as HttpVersion.Version10,I get Bad request when I try to do req.GetResponseStream().

If i set the req.ProtocolVersion as HttpVersion.Version11,I get Could not create SSL/TLS secure channel. when i try to do req.GetResponseStream().

If tried to post the data using POSTMAN, but even Postman says Could not get any response".

If I try to hit the URL using IE-11 I get HTTP 404.[I know i am not posting the actual file], but Chrome displays the custom/appropriate error message.

I tried the solutions already provided on stackoverflow, but unfortunately they do not solve my problem.

Thankyou.

@LeonBarkan : Chrome displays appropriate error message, IE shows HTTP 404 — Magellan, Jun 20 '17 at 08:14
maybe you need certificate from your server to be installed at client side ? — Leon Barkan, Jun 20 '17 at 08:15
@LeonBarkan : I do have the certificate installed on client side. Found the solution, see my answer. Thanks for your inputs — Magellan, Jun 20 '17 at 14:00

Nirman · Answer 1 · 2017-06-20T06:19:40.707

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Which solution you have tried? It's worth trying the following if you haven't already - write following before you actually invoke the service:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

edited Jun 20 '17 at 06:19

answered Jun 20 '17 at 05:24

Nirman

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I think SSL3 is no longer considered secure. For more info https://stackoverflow.com/a/6584992/6190900 – Joseph Jun 20 '17 at 05:36
Thanks Joseph for making aware about SSL3. I have updated answer now. – Nirman Jun 20 '17 at 06:20

Magellan · Accepted Answer · 2017-06-21T07:13:21.090

Two things that I was doing wrong.

The Server wanted date in yyyy-MM-ddTHH:mm:ss, I was providing the date in yyyy-MM-ddTHH:mm:ss.ssss Format(DateTime.UtcNow.ToString("o")). This was the cause of Could not create SSL/TLS secure channel
The server wanted the parameters in request body as well. I had passed the parameters only as query string. This was the cause of HTTP 404

In the process, I had asked a guy outside my team to help. He had asked me to see if there were any SSL related errors. To do this he asked me to add System.Net.ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications); and define AcceptAllCertifications, which was not the case. So to resolve the issue, I had to take care of the things mentioned above.

score 0 · Answer 3 · answered Jun 20 '17 at 08:19

0

Try to create self signed certificate from your server and add it to your client machine.

Create self signed certificate (Server side)

Import self signed certificate (Client side)

answered Jun 20 '17 at 08:19

Leon Barkan

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HTTPWebRequest Could not create SSL/TLS secure channel

3 Answers3