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On CentOS Powershell uses the system libcurl that does not support custom SSL certificate validation #2511

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@atanasa

Description

@atanasa
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This is similar to #2211 but for CentOS. This is probably still an issue with dotnet but maybe powershell can patch it in a similar way as the OS X patch. I haven't found a workaround yet.

Steps to reproduce

Run:

$handler = new-object "System.Net.Http.HttpClientHandler"
$handler.ServerCertificateCustomValidationCallback = { $true }
$client = new-object "System.Net.Http.HttpClient" -Arg @($handler)
$client.GetStringAsync("https://google.com").GetAwaiter().GetResult()

Expected behavior

An error telling you that there is no runtime context on the thread. Which means the execution reached the validation script block.

Actual behavior

Error:

Exception calling "GetResult" with "0" argument(s): "The libcurl library in 
use (7.29.0) and its SSL backend ("NSS/3.19.1 Basic ECC") do not support 
custom handling of certificates. A libcurl built with OpenSSL is required."
At line:1 char:1
+ $client.GetStringAsync("https://google.com").GetAwaiter().GetResult()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : PlatformNotSupportedException

Environment data

> $PSVersionTable
Name                           Value                                           
----                           -----                                           
PSVersion                      6.0.0-alpha                                     
PSEdition                      Core                                            
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                         
BuildVersion                   3.0.0.0                                         
GitCommitId                    v6.0.0-alpha.11                                 
CLRVersion                                                                     
WSManStackVersion              3.0                                             
PSRemotingProtocolVersion      2.3                                             
SerializationVersion           1.1.0.1
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