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libssh2: add CURLOPT_SSH_HOSTKEYFUNCTION

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The callback set by CURLOPT_SSH_HOSTKEYFUNCTION is called to check
wether or not the connection should continue.

The host key is passed in argument with a custom handle for the
application.

It overrides CURLOPT_SSH_KNOWNHOSTS

Closes #7959
This commit is contained in:
michael musset 2021-11-04 15:55:47 +01:00 • committed by Daniel Stenberg
parent 267d560b5a
commit 1544513958
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GPG key ID: 5CC908FDB71E12C2
11 changed files with 263 additions and 20 deletions
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12
lib/setopt.c
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@ -2466,7 +2466,19 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
result = Curl_setstropt(&data->set.str[STRING_SSH_KNOWNHOSTS],
va_arg(param, char *));
break;
#ifdef USE_LIBSSH2
case CURLOPT_SSH_HOSTKEYFUNCTION:
/* the callback to check the hostkey without the knownhost file */
data->set.ssh_hostkeyfunc = va_arg(param, curl_sshhostkeycallback);
break;
case CURLOPT_SSH_HOSTKEYDATA:
/*
* Custom client data to pass to the SSH keyfunc callback
*/
data->set.ssh_hostkeyfunc_userp = va_arg(param, void *);
break;
#endif
case CURLOPT_SSH_KEYFUNCTION:
/* setting to NULL is fine since the ssh.c functions themselves will
then revert to use the internal default */