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¶

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

SEE ALSO¶

CURLOPT_SSH_HOSTKEYFUNCTION(3)