title: CURL showing "No required SSL certificate was sent" eve
body: <p>I am using a CURL command from WINDOWS.
  I have posted the command below.
  I have also posted the results of the command.
  It appears to me, the server is terminating the connection before sending the certificate.
  But I could wrong.
  Any ideas why the certificate is not being sent?</p>
  <pre><code>curl -v --cert C:\Users\myFolder\Downloads\hs_test_cert.pem --key C:\Users\myFolder\Downloads\hst_test_key.pem https://myAPIGEEhost.apigee.net/MyBackendName_CCDA_API?apikey=MyAssignedAPIKey
  
   *   Trying 00.00.00...
  * TCP_NODELAY set
  * Connected to myAPIGEEhost.apigee.net (00.00.00) port 443 (#0)
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 1/3)
  * schannel: checking server certificate revocation
  * schannel: sending initial handshake data: sending 203 bytes...
  * schannel: sent initial handshake data: sent 203 bytes
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 2/3)
  * schannel: failed to receive handshake, need more data
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 2/3)
  * schannel: encrypted data got 4096
  * schannel: encrypted data buffer: offset 4096 length 4096
  * schannel: encrypted data length: 4026
  * schannel: encrypted data buffer: offset 4026 length 4096
  * schannel: received incomplete message, need more data
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 2/3)
  * schannel: encrypted data got 964
  * schannel: encrypted data buffer: offset 4990 length 5050
  * schannel: a client certificate has been requested
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 2/3)
  * schannel: encrypted data buffer: offset 4990 length 6014
  * schannel: sending next handshake data: sending 133 bytes...
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 2/3)
  * schannel: encrypted data got 274
  * schannel: encrypted data buffer: offset 274 length 6014
  * schannel: SSL/TLS handshake complete
  * schannel: SSL/TLS connection with myAPIGEEhost.apigee.net port 443 (step 3/3)
  * schannel: stored credential handle in session cache
  &gt; GET /MyBackendName_CCDA_API?apikey=MyAssignedAPIKey HTTP/1.1
  &gt; Host: myAPIGEEhost.apigee.net
  &gt; User-Agent: curl/7.55.1
  &gt; Accept: */*
  &gt;
  * schannel: client wants to read 102400 bytes
  * schannel: encdata_buffer resized 103424
  * schannel: encrypted data buffer: offset 0 length 103424
  * schannel: encrypted data got 421
  * schannel: encrypted data buffer: offset 421 length 103424
  * schannel: decrypted data length: 361
  * schannel: decrypted data added: 361
  * schannel: decrypted data cached: offset 361 length 102400
  * schannel: encrypted data length: 31
  * schannel: encrypted data cached: offset 31 length 103424
  * schannel: server closed the connection
  * schannel: schannel_recv cleanup
  * schannel: decrypted data returned 361
  * schannel: decrypted data buffer: offset 0 length 102400
  &lt; HTTP/1.1 400 Bad Request
  &lt; Date: Mon, 27 Sep 2021 18:22:21 GMT
  &lt; Content-Type: text/html
  &lt; Content-Length: 231
  &lt; Connection: close
  &lt;
  &lt;html&gt;
  &lt;head&gt;&lt;title&gt;400 No required SSL certificate was sent&lt;/title&gt;&lt;/head&gt;
  &lt;body&gt;
  &lt;center&gt;&lt;h1&gt;400 Bad Request&lt;/h1&gt;&lt;/center&gt;
  &lt;center&gt;No required SSL certificate was sent&lt;/center&gt;
  &lt;hr&gt;&lt;center&gt;server&lt;/center&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  * Closing connection 0
  * schannel: shutting down SSL/TLS connection with myAPIGEEhost.apigee.net port 443
  * schannel: clear security context handle
  </code></pre>