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deps/curl/docs/libcurl/opts/CURLOPT_PROXY_SSLKEY.md

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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_PROXY_SSLKEY
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_PROXY_SSLCERT (3)
+  - CURLOPT_PROXY_SSLKEYTYPE (3)
+  - CURLOPT_SSLCERT (3)
+  - CURLOPT_SSLKEY (3)
+  - CURLOPT_SSLKEYTYPE (3)
+---
+
+# NAME
+
+CURLOPT_PROXY_SSLKEY - private key file for HTTPS proxy client cert
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLKEY, char *keyfile);
+~~~
+
+# DESCRIPTION
+
+Pass a pointer to a null-terminated string as parameter. The string should be
+the filename of your private key used for connecting to the HTTPS proxy. The
+default format is "PEM" and can be changed with
+CURLOPT_PROXY_SSLKEYTYPE(3).
+
+(Windows, iOS and Mac OS X) This option is ignored by Secure Transport and
+Schannel SSL backends because they expect the private key to be already
+present in the key chain or PKCS#12 file containing the certificate.
+
+The application does not have to keep the string around after setting this
+option.
+
+# DEFAULT
+
+NULL
+
+# PROTOCOLS
+
+All
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
+    curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy");
+    curl_easy_setopt(curl, CURLOPT_PROXY_SSLCERT, "client.pem");
+    curl_easy_setopt(curl, CURLOPT_PROXY_SSLKEY, "key.pem");
+    curl_easy_setopt(curl, CURLOPT_PROXY_KEYPASSWD, "s3cret");
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# AVAILABILITY
+
+Added in 7.52.0
+
+If built TLS enabled.
+
+# RETURN VALUE
+
+Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
+CURLE_OUT_OF_MEMORY if there was insufficient heap space.