CURLOPT_SSH_HOSTKEYDATA - pointer to pass to the SSH host key callback

NAME  SYNOPSIS  DESCRIPTION  DEFAULT  PROTOCOLS  EXAMPLE  AVAILABILITY  RETURN VALUE  SEE ALSO 

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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

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);
}
}

AVAILABILITY

Added in 7.84.0, works only with libssh2 backend.

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

CURLOPT_SSH_HOSTKEYFUNCTION(3)

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