NAME

       libssh2_knownhost_check - check a host+key against the list of known hosts

SYNOPSIS

       #include <libssh2.h>

       int libssh2_knownhost_check(LIBSSH2_KNOWNHOSTS *hosts,
                                   const char *host,
                                   const char *key, size_t keylen,
                                   int typemask,
                                   struct libssh2_knownhost **knownhost);

DESCRIPTION

       Checks  a  host and its associated key against the collection of known hosts, and returns info back about
       the (partially) matched entry.

       host is a pointer the host name in plain text. The host name can be the IP numerical address of the  host
       or the full name.

       key is a pointer to the key for the given host.

       keylen is the total size in bytes of the key pointed to by the key argument

       typemask  is  a  bitmask  that  specifies  format  and  info  about  the  data  passed  to this function.
       Specifically, it details what format the host name is, what format the key is and what key type it is.

       The  host  name  is  given   as   one   of   the   following   types:   LIBSSH2_KNOWNHOST_TYPE_PLAIN   or
       LIBSSH2_KNOWNHOST_TYPE_CUSTOM.

       The   key   is   encoded   using   one   of  the  following  encodings:  LIBSSH2_KNOWNHOST_KEYENC_RAW  or
       LIBSSH2_KNOWNHOST_KEYENC_BASE64.

       knownhost if set to non-NULL, it must be a pointer to a  'struct  libssh2_knownhost'  pointer  that  gets
       filled in to point to info about a known host that matches or partially matches.

RETURN VALUE

       libssh2_knownhost_check(3)  returns  info  about how well the provided host + key pair matched one of the
       entries in the list of known hosts.

       LIBSSH2_KNOWNHOST_CHECK_FAILURE - something prevented the check to be made

       LIBSSH2_KNOWNHOST_CHECK_NOTFOUND - no host match was found

       LIBSSH2_KNOWNHOST_CHECK_MATCH - hosts and keys match.

       LIBSSH2_KNOWNHOST_CHECK_MISMATCH - host was found, but the keys didn't match!

AVAILABILITY

       Added in libssh2 1.2

EXAMPLE

       See the ssh2_exec.c example as provided in the tarball.

SEE ALSO

       libssh2_knownhost_init(3) libssh2_knownhost_free(3) libssh2_knownhost_add(3)