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CURLOPT_USERPWD(3) curl_easy_setopt options CURLOPT_USERPWD(3)
CURLOPT_USERPWD - user name and password to use in authentication
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USERPWD, char *userpwd);
Pass a char * as parameter, pointing to a null-terminated login details
string for the connection. The format of which is: [user
When using Kerberos V5 authentication with a Windows based server, you
should specify the user name part with the domain name in order for the
server to successfully obtain a Kerberos Ticket. If you do not then the
initial part of the authentication handshake may fail.
When using NTLM, the user name can be specified simply as the user name
without the domain name should the server be part of a single domain
To specify the domain name use either Down-Level Logon Name or UPN
(User Principal Name) formats. For example, EXAMPLE\user and
Some HTTP servers (on Windows) support inclusion of the domain for
Basic authentication as well.
When using HTTP and CURLOPT_FOLLOWLOCATION(3), libcurl might perform
several requests to possibly different hosts. libcurl will only send
this user and password information to hosts using the initial host name
(unless CURLOPT_UNRESTRICTED_AUTH(3) is set), so if libcurl follows
locations to other hosts it will not send the user and password to
those. This is enforced to prevent accidental information leakage.
Use CURLOPT_HTTPAUTH(3) to specify the authentication method for HTTP
based connections or CURLOPT_LOGIN_OPTIONS(3) to control IMAP, POP3 and
The user and password strings are not URL decoded, so there's no way to
send in a user name containing a colon using this option. Use
CURLOPT_USERNAME(3) for that, or include it in the URL.
The application does not have to keep the string around after setting
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_USERPWD, "clark:kent");
ret = curl_easy_perform(curl);
Returns CURLE_OK on success or CURLE_OUT_OF_MEMORY if there was
insufficient heap space.
CURLOPT_USERNAME(3), CURLOPT_PASSWORD(3), CURLOPT_PROXYUSERPWD(3),
libcurl 7.86.0 May 17, 2022 CURLOPT_USERPWD(3)