Winhttp https

Winhttp https

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The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have created a simple web server with winhttp that has only one client, a website.

It worked perfectly until I enabled SSL. I don't get any errors, and everything seems to work, but the website gets error code when it tries to connect, and I don't etap ppt any activity in the server. The website was created by professionals, so the bug is very likely to be in my code. Without SSL it can connect to the server. But when I try to set the clients certificate, it fails. So now I have two problems.

Sometimes I see access violation errors in the debug output. The reported addresses are close to the value of request. The client code :. If there is a good tutorial on this subject, that would be nice. What I found so far was just enough to write the code above. Learn more. Asked 8 years, 7 months ago.

Active 5 years, 7 months ago. Viewed 6k times. Andrew Andrew 31 1 1 silver badge 2 2 bronze badges. Thanks a lot! Now the test client works. Active Oldest Votes. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

Email Required, but never shown. The Overflow Blog. Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The problem is with authentication. The file is being saved but when I open it in Excel it's just the html logon page instead of the actual file.

If I copy direct file url and paste it into browser addressbar and I'm not logged in to the webpage the effect is the same. I'm presented with the logon page. Then if I enter my login and password the download window will show up allowing me to save the file.

So I think that SetCredentials part of the code is not working properly cause if I debug. ResponseBody it's html code instead of the acutal file data. So I've played a little bit with it today and I think I'm moving forward. Here's what I got. I Modyfied the code like this:. Did I do the authentication rigth and the problem is with saving the file to the disk or still is there a problem with authentication and that's why I cannot save it?

Any clues? Learn more. Asked 6 years, 1 month ago. Active 4 years, 9 months ago. Viewed 32k times. Send Debug. GetAllResponseHeaders I get e.

SetCredentials doesn't seem very reliable. I'm using it in my code just before set credentials but it doesn't work. Any sugestions? Aside from that, you could automate the log in page through IE, submit your user ID and password, and then navigate to the page to get the information you need.

I've already automated the logon to get the direct file urls at the first place. But I want to be able to download the file "silently", without any popup download windows. ResponseBody works great for other nonpassprotected sites and for some passprotected http sites as well. The problem is with this particular https site.

Edit: Looking at html code of the website that I provided is it possible to figure out what method has to be used to pass the username and password and properly download the file?

Active Oldest Votes.SSL provides a mechanism to perform up to bit encryption on all transactions between the client and server. It enables the client to verify that the server belongs to a trusted entity through the use of server certificates. It also enables the server to confirm the identity of the client with client certificates. Essentially, the client and server each present a list of required and preferred settings.

If a common set of requirements can be agreed upon and met, an SSL connection is established.

winhttp https

While the details of the SSL handshake and transaction are handled internally, WinHTTP enables you to retrieve encryption levels, specify the security protocol, and interact with server and client certificates. Server certificates are sent from the server to the client so that the client can obtain a public key for the server and ensure that the server has been verified by a certification authority.

Certificates can contain different types of data. For example, an X. If a server certificate contains errors, details about the error can be obtained in the status callback function.

The lpvStatusInformation parameter contains one or more detailed error flags. During the SSL handshake, the server might require authentication. The client is authenticated by supplying a valid client certificate to the server. WinHTTP enables you to select and send a certificate from a local certificate store. Upon receiving this error, use the appropriate CryptoAPI functions to find an appropriate certificate. Before resending a request that contains a client certificate, you can determine if the supported level of encryption is acceptable for your application.

For computers running on Windows Server and Windows Vista, WinHttp enables the application to retrieve the certificate issuer list supplied by the server in the authentication challenge.

The Issuer List specifies a list of Certificate Authorities CAs that are authorized by the server to issue client certificates. The application filters the issuer list to obtain the required certificate. The following code example shows how to retrieve the issuer list. If the server requests the certificate, but does not require it, the application can specify this option to indicate that it does not have a certificate.

The server can choose another authentication scheme or allow anonymous access to the server. Use the SetClientCertificate method of the WinHttpRequest object to select client certificates to send to the server with a request. Select a certificate by specifying a certificate selection string with the SetClientCertificate method. The certificate selection string consists of the certificate location, certificate storeand subject name delimited by backslashes. The following table lists components for this selection string.

The certificate store name and location are optional components. However, if you specify a certificate storeyou must also specify the location of that certificate store. In some languages the backslash is an escape character. Remember to modify the certificate selection string to account for this.

For example, in Microsoft JScript, use two adjacent backslashes instead of one. If no certificates exist, an error is raised. If the certificate is not accepted, the server returns a status code to indicate that the request cannot be fulfilled. You can then choose a more appropriate certificate with SetClientCertificate and resend the request. Skip to main content. Exit focus mode.Note In this command, replace the three hyphens with the following text, including the appropriate values for the placeholders:.

VBA Web Requests

You can also import the settings from the Internet Options item in Control Panel. You can use following command:. Note If you have everything correctly set up and you want to restore a direct connection, run the following command:. All the configurations are stored in a registry value that is located in the following path:.

Note We recommend that you test these settings before you apply them to a production environment. Follow these steps first on an organizational unit that has Block Inheritance applied and has only a few computer objects assigned.

From a computer that's located in the target OU, run the following command to make sure that WinHTTP Services proxy settings are applied successfully:. This site uses cookies for analytics, personalized content and ads. By continuing to browse this site, you agree to this use. Learn more. Select Product Version.

All Products. More information. Other available parameters. Last Updated: 4 Feb Was this information helpful? Yes No. Tell us what we can do to improve the article Submit. Your feedback will help us improve the support experience. Australia - English. Bosna i Hercegovina - Hrvatski. Canada - English. Crna Gora - Srpski. Danmark - Dansk. Deutschland - Deutsch.

Eesti - Eesti. Hrvatska - Hrvatski. India - English. Indonesia Bahasa - Bahasa. Ireland - English. Italia - Italiano.This is because the definition of this flag doesn't include these applications and services. As these protocol versions are not enabled by default in Windows 7, you must configure the registry settings to ensure Office applications can successfully use TLS 1.

This update will not change the behavior of applications that are manually setting the secure protocols instead of passing the default flag. Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update.

For more information, see Add language packs to Windows. This update is provided as a Recommended update on Windows Update.

For more information about how to run Windows Update, see How to get an update through Windows Update. To get the stand-alone package for this update, go to the Microsoft Update Catalog website. To apply this update, the DefaultSecureProtocols registry subkey must be added.

Note To do this, you can add the registry subkey manually or install the " Easy fix " to populate the registry subkey.

winhttp https

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows.

Note The hotfix installer doesn't add the DefaultSecureProtocols value. The administrator must manually add the entry after determining the override protocols. Or, you can install the " Easy fix " to add the entry automatically. The value to use is determined by adding the values corresponding to the protocols desired.

winhttp https

Take the value for TLS 1. To add the DefaultSecureProtocols registry subkey automatically, click the Download button. In the File Download dialog box, click Run or Openand then follow the steps in the easy fix wizard. These subkeys will not be created in the registry since these protocols are disabled by default.Note In this command, replace the three hyphens with the following text, including the appropriate values for the placeholders:.

You can also import the settings from the Internet Options item in Control Panel. You can use following command:. Note If you have everything correctly set up and you want to restore a direct connection, run the following command:. All the configurations are stored in a registry value that is located in the following path:. Note We recommend that you test these settings before you apply them to a production environment.

Follow these steps first on an organizational unit that has Block Inheritance applied and has only a few computer objects assigned. From a computer that's located in the target OU, run the following command to make sure that WinHTTP Services proxy settings are applied successfully:. Skip to main content. Valitse tuoteversio. Kaikki tuotteet. More information. Other available parameters.

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WinHTTP Functions

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The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The above code works perfectly over HTTP connection unsecured. But this requieres to save my site's certificate on the client's computer.

I wish to avoid this inconvenience. Is it possible to establish a secured connection over WinHttpRequest without saving the certificate on client's computer? Learn more. Asked 2 years, 6 months ago. Active 2 years, 6 months ago. Viewed 2k times. I am using WinHttpRequest. SetTimeouts,htttpObj. I could add this code to enable https: HttpReq. Ihidan Ihidan 4 4 silver badges 17 17 bronze badges. I believe that SetClientCertificate is only used for two way authentication. I might be wrong though.

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