CURLOPT_TLSAUTH_TYPE (3) - Linux Manuals
CURLOPT_TLSAUTH_TYPE: set TLS authentication methods
NAMECURLOPT_TLSAUTH_TYPE - set TLS authentication methods
DESCRIPTIONPass a long as parameter, which is set to a bitmask, to tell libcurl which authentication method(s) you want it to use for TLS authentication.
- TLS-SRP authentication. Secure Remote Password authentication for TLS is defined in RFC5054 and provides mutual authentication if both sides have a shared secret. To use TLS-SRP, you must also set the CURLOPT_TLSAUTH_USERNAME(3) and CURLOPT_TLSAUTH_PASSWORD(3) options.