mirror of
https://codeberg.org/kiss-community/repo
synced 2024-12-23 07:40:11 -07:00
76 lines
2.2 KiB
Groff
76 lines
2.2 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_SSH_HOSTKEYFUNCTION.md
|
|
.TH CURLOPT_SSH_HOSTKEYFUNCTION 3 "2024-08-02" libcurl
|
|
.SH NAME
|
|
CURLOPT_SSH_HOSTKEYFUNCTION \- callback to check host key
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
int keycallback(void *clientp,
|
|
int keytype,
|
|
const char *key,
|
|
size_t keylen);
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_HOSTKEYFUNCTION,
|
|
keycallback);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
Pass a pointer to your callback function, which should match the prototype
|
|
shown above. It overrides \fICURLOPT_SSH_KNOWNHOSTS(3)\fP.
|
|
|
|
This callback gets called when the verification of the SSH host key is needed.
|
|
|
|
\fBkey\fP is \fBkeylen\fP bytes long and is the key to check. \fBkeytype\fP
|
|
says what type it is, from the \fBCURLKHTYPE_\fP* series in the
|
|
\fBcurl_khtype\fP enum.
|
|
|
|
\fBclientp\fP is a custom pointer set with \fICURLOPT_SSH_HOSTKEYDATA(3)\fP.
|
|
|
|
The callback MUST return one of the following return codes to tell libcurl how
|
|
to act:
|
|
.IP CURLKHMATCH_OK
|
|
The host key is accepted, the connection should continue.
|
|
.IP CURLKHMATCH_MISMATCH
|
|
the host key is rejected, the connection is canceled.
|
|
.SH DEFAULT
|
|
NULL
|
|
.SH PROTOCOLS
|
|
This functionality affects scp and sftp
|
|
.SH EXAMPLE
|
|
.nf
|
|
struct mine {
|
|
void *custom;
|
|
};
|
|
|
|
int hostkeycb(void *clientp, /* passed with 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)
|
|
{
|
|
struct mine callback_data;
|
|
CURL *curl = curl_easy_init();
|
|
if(curl) {
|
|
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);
|
|
}
|
|
}
|
|
.fi
|
|
.SH NOTES
|
|
Work only with the libssh2 backend.
|
|
.SH AVAILABILITY
|
|
Added in curl 7.84.0
|
|
.SH RETURN VALUE
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|
|
.SH SEE ALSO
|
|
.BR CURLOPT_SSH_HOSTKEYDATA (3),
|
|
.BR CURLOPT_SSH_KNOWNHOSTS (3)
|