libssh2_userauth_password_ex(3) [centos man page]

libssh2_userauth_password_ex(3) 				  libssh2 manual				   libssh2_userauth_password_ex(3)

NAME

       libssh2_userauth_password_ex - authenticate a session with username and password

SYNOPSIS

       #include <libssh2.h>
       int libssh2_userauth_password_ex(LIBSSH2_SESSION *session,
			   const char *username,
			   unsigned int username_len,
			   const char *password,
			   unsigned int password_len,
			   LIBSSH2_PASSWD_CHANGEREQ_FUNC((*passwd_change_cb)));

       #define libssh2_userauth_password(session, username, password) 
	libssh2_userauth_password_ex((session), (username), 
				     strlen(username), 
				     (password), strlen(password), NULL)

DESCRIPTION

       session - Session instance as returned by libssh2_session_init_ex(3)

       username - Name of user to attempt plain password authentication for.

       username_len - Length of username parameter.

       password - Password to use for authenticating username.

       password_len - Length of password parameter.

       passwd_change_cb - If the host accepts authentication but requests that the password be changed, this callback will be issued.  If no call-
       back is defined, but server required password change, authentication will fail.

       Attempt basic password authentication. Note that many SSH servers which appear to support ordinary password authentication actually have it
       disabled and use Keyboard Interactive authentication (routed via PAM or another authentication backed) instead.

RETURN VALUE

       Return 0 on success or negative on failure.  It returns LIBSSH2_ERROR_EAGAIN when it would otherwise block. While LIBSSH2_ERROR_EAGAIN is a
       negative number, it isn't really a failure per se.

ERRORS

       Some of the errors this function may return include:

       LIBSSH2_ERROR_ALLOC -  An internal memory allocation call failed.

       LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

       LIBSSH2_ERROR_PASSWORD_EXPIRED -

       IBSSH2_ERROR_AUTHENTICATION_FAILED - failed, invalid username/password or public/private key.

SEE ALSO

       libssh2_session_init_ex(3)

libssh2 0.15							    1 Jun 2007					   libssh2_userauth_password_ex(3)

NE_SET_SERVER_AUTH(3)						neon API reference					     NE_SET_SERVER_AUTH(3)

NAME

       ne_set_server_auth, ne_set_proxy_auth, ne_forget_auth - register authentication callbacks

SYNOPSIS

       #include <ne_auth.h>

       typedef int (*ne_auth_creds)(void *userdata, const char *realm, int attempt, char *username, char *password);

       void ne_set_server_auth(ne_session *session, ne_auth_creds callback, void *userdata);

       void ne_set_proxy_auth(ne_session *session, ne_auth_creds callback, void *userdata);

       void ne_forget_auth(ne_session *session);

DESCRIPTION

       The ne_auth_creds function type defines a callback which is invoked when a server or proxy server requires user authentication for a
       particular request. The realm string is supplied by the server.	The attempt is a counter giving the number of times the request has been
       retried with different authentication credentials. The first time the callback is invoked for a particular request, attempt will be zero.

       To retry the request using new authentication credentials, the callback should return zero, and the username and password buffers must
       contain NUL-terminated strings. The NE_ABUFSIZ constant gives the size of these buffers.

	   Tip
	   If you only wish to allow the user one attempt to enter credentials, use the value of the attempt parameter as the return value of the
	   callback.

       To abort the request, the callback should return a non-zero value; in which case the contents of the username and password buffers are
       ignored.

       The ne_forget_auth function can be used to discard the cached authentication credentials.

EXAMPLES

	   /* Function which prompts for a line of user input: */
	   extern char *prompt_for(const char *prompt);

	   static int
	   my_auth(void *userdata, const char *realm, int attempts,
		   char *username, char *password)
	   {
	      strncpy(username, prompt_for("Username: "), NE_ABUFSIZ);
	      strncpy(password, prompt_for("Password: "), NE_ABUFSIZ);
	      return attempts;
	   }

	   int main(...)
	   {
	      ne_session *sess = ne_session_create(...);

	      ne_set_server_auth(sess, my_auth, NULL);

	      /* ... */
	   }

AUTHOR

       Joe Orton <neon@lists.manyfish.co.uk>
	   Author.

COPYRIGHT

neon 0.29.6							    3 May 2011						     NE_SET_SERVER_AUTH(3)