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libssh2_knownhost_check(3)	     libssh2	      libssh2_knownhost_check(3)

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_KNOWN-
     HOST_TYPE_PLAIN or LIBSSH2_KNOWNHOST_TYPE_CUSTOM.

     The  key  is  encoded  using one of the following encodings: LIBSSH2_KNOWN-
     HOST_KEYENC_RAW or LIBSSH2_KNOWNHOST_KEYENC_BASE64.

     knownhost if set to non-NULL, it must  be	a  pointer  to	a  'struct  lib-
     ssh2_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 did not
     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_known-
     host_add(3)

libssh2 			   28 May 2009	      libssh2_knownhost_check(3)

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