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repo/core/curl/files/CURLOPT_KEYPASSWD.3

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.\" generated by cd2nroff 0.1 from CURLOPT_KEYPASSWD.md
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.TH CURLOPT_KEYPASSWD 3 "2024-07-29" libcurl
.SH NAME
CURLOPT_KEYPASSWD \- passphrase to private key
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KEYPASSWD, char *pwd);
.fi
.SH DESCRIPTION
Pass a pointer to a null\-terminated string as parameter. It is used as the
password required to use the \fICURLOPT_SSLKEY(3)\fP or
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\fICURLOPT_SSH_PRIVATE_KEYFILE(3)\fP private key. You never need a passphrase to
load a certificate but you need one to load your private key.
The application does not have to keep the string around after setting this
option.
.SH DEFAULT
NULL
.SH PROTOCOLS
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This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
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This option works only with the following TLS backends:
OpenSSL, Schannel, mbedTLS and wolfSSL
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_SSLCERT, "client.pem");
curl_easy_setopt(curl, CURLOPT_SSLKEY, "key.pem");
curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "superman");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
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.SH HISTORY
This option was known as CURLOPT_SSLKEYPASSWD up to 7.16.4 and
CURLOPT_SSLCERTPASSWD up to 7.9.2.
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.SH AVAILABILITY
Added in curl 7.17.0
.SH RETURN VALUE
Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH SEE ALSO
.BR CURLOPT_SSH_PRIVATE_KEYFILE (3),
.BR CURLOPT_SSLKEY (3)