easy:SetOpt_Proxy_SSLCert -- set SSL proxy client certificate
This option is for connecting to an HTTPS proxy, not an HTTPS server.

Pass a string as parameter. The string should be the file name of your client certificate used to connect to the HTTPS proxy. The default format is "P12" on Secure Transport and "PEM" on other engines, and can be changed with #CURLOPT_PROXY_SSLCERTTYPE.

With NSS or Secure Transport, this can also be the nickname of the certificate you wish to authenticate with as it is named in the security database. If you want to use a file from the current directory, please precede it with "./" prefix, in order to avoid confusion with a nickname.

When using a client certificate, you most likely also need to provide a private key with #CURLOPT_PROXY_SSLKEY.

input value

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