---
name: "CURLOPT_PROXY_TLSAUTH_PASSWORD"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_PROXY_TLSAUTH_PASSWORD"
---

# CURLOPT\_PROXY\_TLSAUTH\_PASSWORD(3)

password to use for proxy TLS authentication

## NAME

CURLOPT\_PROXY\_TLSAUTH\_PASSWORD - password to use for proxy TLS authentication

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLSAUTH_PASSWORD,
                          char *pwd);
```

## DESCRIPTION

Pass a char pointer as parameter, which should point to the null-terminated password to use for the TLS authentication method specified with the *[CURLOPT\_PROXY\_TLSAUTH\_TYPE(3)](/CURLOPT_PROXY_TLSAUTH_TYPE/3.md)* option. Requires that the *[CURLOPT\_PROXY\_TLSAUTH\_USERNAME(3)](/CURLOPT_PROXY_TLSAUTH_USERNAME/3.md)* option also be set.

The application does not have to keep the string around after setting this option.

Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again.

## DEFAULT

NULL

## DEPRECATED

This option was deprecated in 8.22.0.

## PROTOCOLS

This functionality affects  all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. only

This option works only with the following TLS backends: GnuTLS and OpenSSL

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy.example");
    curl_easy_setopt(curl, CURLOPT_PROXY_TLSAUTH_TYPE, "SRP");
    curl_easy_setopt(curl, CURLOPT_PROXY_TLSAUTH_USERNAME, "user");
    curl_easy_setopt(curl, CURLOPT_PROXY_TLSAUTH_PASSWORD, "secret");
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in curl 7.52.0

## RETURN VALUE

*[curl\_easy\_setopt(3)](/curl_easy_setopt/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLOPT\_PROXY\_TLSAUTH\_TYPE**(3)](/CURLOPT_PROXY_TLSAUTH_TYPE/3.md), [**CURLOPT\_PROXY\_TLSAUTH\_USERNAME**(3)](/CURLOPT_PROXY_TLSAUTH_USERNAME/3.md), [**CURLOPT\_TLSAUTH\_TYPE**(3)](/CURLOPT_TLSAUTH_TYPE/3.md), [**CURLOPT\_TLSAUTH\_USERNAME**(3)](/CURLOPT_TLSAUTH_USERNAME/3.md)