CURLOPT_SSH_HOSTKEYDATA(3) Library Functions Manual
NAME
CURLOPT_SSH_HOSTKEYDATA - pointer to pass to the SSH host key callback
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_HOSTKEYDATA, void *pointer);
DESCRIPTION
Pass a void * as parameter. This pointer is passed along untouched to
the callback set with CURLOPT_SSH_HOSTKEYFUNCTION(3).
DEFAULT
NULL
PROTOCOLS
This functionality affects scp and sftp
EXAMPLE
struct mine {
void *custom;
};
static int hostkeycb(void *clientp, /* CURLOPT_SSH_HOSTKEYDATA */
int keytype, /* CURLKHTYPE */
const char *key, /* host key to check */
size_t keylen) /* length of the key */
{
/* 'clientp' points to the callback_data struct */
/* investigate the situation and return the correct value */
return CURLKHMATCH_OK;
}
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
struct mine callback_data;
curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");
curl_easy_setopt(curl, CURLOPT_SSH_HOSTKEYFUNCTION, hostkeycb);
curl_easy_setopt(curl, CURLOPT_SSH_HOSTKEYDATA, &callback_data);
curl_easy_perform(curl);
}
}
NOTES
Works only with the libssh2 backend.
AVAILABILITY
Added in curl 7.84.0
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLOPT_SSH_HOSTKEYFUNCTION(3)
libcurl 2025-02-08 CURLOPT_SSH_HOSTKEYDATA(3)
curl 8.12.0 - Generated Tue Feb 18 18:49:18 CST 2025