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CURLOPT_SS...KEY_SHA256(3) Library Functions Manual CURLOPT_SS...KEY_SHA256(3)

NAME
       CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256  -  SHA256 hash of SSH server	public
       key

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256,
				 char *sha256);

DESCRIPTION
       Pass a char pointer pointing to a string	 containing  a	Base64-encoded
       SHA256  hash of the remote host's public	key. The transfer fails	if the
       given hash does not match the hash the remote host provides.

       The application does not	have to	keep the string	around	after  setting
       this option.

       Using this option multiple times	makes the last set string override the
       previous	ones. Set it to	NULL to	disable	its use	again.

DEFAULT
       NULL

PROTOCOLS
       This functionality affects scp and sftp

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
	   curl_easy_setopt(curl, CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256,
			    "NDVkMTQxMGQ1ODdmMjQ3MjczYjAyOTY5MmRkMjVmNDQ=");
	   res = curl_easy_perform(curl);
	   curl_easy_cleanup(curl);
	 }
       }

NOTES
       Requires	the libssh2 backend.

AVAILABILITY
       Added in	curl 7.80.0

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_AUTH_TYPES(3),   CURLOPT_SSH_HOST_PUBLIC_KEY_MD5(3),	  CUR-
       LOPT_SSH_PUBLIC_KEYFILE(3)

libcurl				  2025-06-03	    CURLOPT_SS...KEY_SHA256(3)

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