/*
* libssh2_knownhost_writeline()
*
* Ask libssh2 to convert a known host to an output line for storage.
*
* Note that this function returns LIBSSH2_ERROR_BUFFER_TOO_SMALL if the given
* output buffer is too small to hold the desired output.
*/
LIBSSH2_API int
libssh2_knownhost_writeline(LIBSSH2_KNOWNHOSTS *hosts,
struct libssh2_knownhost *known,
char *buffer, size_t buflen,
size_t *outlen, /* the amount of written data */
int type)
{
struct known_host *node;
if(known->magic != KNOWNHOST_MAGIC)
return LIBSSH2_ERROR_INVAL;
node = known->node;
return knownhost_writeline(hosts, node, buffer, buflen, outlen, type);
}
/*
* libssh2_knownhost_writefile()
*
* Write hosts+key pairs to the given file.
*/
LIBSSH2_API int
libssh2_knownhost_writefile(LIBSSH2_KNOWNHOSTS *hosts,
const char *filename, int type)
{
struct known_host *node;
FILE *file;
int rc = LIBSSH2_ERROR_NONE;
char buffer[2048];
/* we only support this single file type for now, bail out on all other
attempts */
if(type != LIBSSH2_KNOWNHOST_FILE_OPENSSH)
return _libssh2_error(hosts->session,
LIBSSH2_ERROR_METHOD_NOT_SUPPORTED,
"Unsupported type of known-host information "
"store");
file = fopen(filename, "w");
if(!file)
return _libssh2_error(hosts->session, LIBSSH2_ERROR_FILE,
"Failed to open file");
for(node = _libssh2_list_first(&hosts->head);
node;
node = _libssh2_list_next(&node->node)) {
size_t wrote = 0;
size_t nwrote;
rc = knownhost_writeline(hosts, node, buffer, sizeof(buffer), &wrote,
type);
if(rc)
break;
nwrote = fwrite(buffer, 1, wrote, file);
if(nwrote != wrote) {
/* failed to write the whole thing, bail out */
rc = _libssh2_error(hosts->session, LIBSSH2_ERROR_FILE,
"Write failed");
break;
}
}
fclose(file);
return rc;
}
