232 lines
7.0 KiB
Groff
232 lines
7.0 KiB
Groff
.\" Copyright (c) 2008 Isilon Inc http://www.isilon.com/
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.\" Authors: Doug Rabson <dfr@rabson.org>
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.\" Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd January 26, 2010
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.Dt RPC_GSS_SECCREATE 3
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.Os
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.Sh NAME
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.Nm RPCSEC_GSS
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.Nd "GSS-API based authentication for RPC"
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.Sh LIBRARY
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.Lb librpcsec_gss
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.Sh SYNOPSIS
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.In rpc/rpcsec_gss.h
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.Sh DESCRIPTION
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.Nm
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is a security mechanism for the RPC protocol.
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It uses the Generic Security Service API (GSS-API) to establish a
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security context between a client and a server and to ensure that all
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subsequent communication between client and server are properly
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authenticated.
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Optionally, extra protection can be applied to the connection.
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The integrity service uses checksums to ensure that all data sent by
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a peer is received without modification.
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The privacy service uses encryption to ensure that no third party can
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access the data for a connection.
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.Pp
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To use this system, an application must first use
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.Fn rpc_gss_seccreate
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to establish a security context.
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.Sh DATA STRUCTURES
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Data structures used by
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.Nm
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appear below.
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.Bl -tag -width "MMMM"
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.It Vt rpc_gss_service_t
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This type defines the types of security service required for
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.Fn rpc_gss_seccreate .
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.Bd -literal
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typedef enum {
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rpc_gss_svc_default = 0,
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rpc_gss_svc_none = 1,
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rpc_gss_svc_integrity = 2,
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rpc_gss_svc_privacy = 3
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} rpc_gss_service_t;
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.Ed
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.It Vt rpc_gss_options_ret_t
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This structure contains various optional values which are used while
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creating a security contect.
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.Bd -literal
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typedef struct {
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int req_flags; /* GSS request bits */
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int time_req; /* requested lifetime */
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gss_cred_id_t my_cred; /* GSS credential */
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gss_channel_bindings_t input_channel_bindings;
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} rpc_gss_options_req_t;
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.Ed
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.It Vt rpc_gss_options_ret_t
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Various details of the created security context are returned using
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this structure.
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.Bd -literal
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typedef struct {
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int major_status;
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int minor_status;
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u_int rpcsec_version;
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int ret_flags;
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int time_req;
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gss_ctx_id_t gss_context;
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char actual_mechanism[MAX_GSS_MECH];
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} rpc_gss_options_ret_t;
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.Ed
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.It Vt rpc_gss_principal_t
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This type is used to refer to an client principal which is represented
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in GSS-API exported name form
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(see
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.Xr gss_export_name 3
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for more details).
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Names in this format may be stored in access control lists or compared
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with other names in exported name form.
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This structure is returned by
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.Fn rpc_gss_get_principal_name
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and is also referenced by the
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.Vt rpc_gss_rawcred_t
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structure.
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.Bd -literal
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typedef struct {
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int len;
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char name[1];
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} *rpc_gss_principal_t;
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.Ed
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.It Vt rpc_gss_rawcred_t
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This structure is used to access the raw credentials associated with a
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security context.
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.Bd -literal
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typedef struct {
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u_int version; /* RPC version number */
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const char *mechanism; /* security mechanism */
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const char *qop; /* quality of protection */
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rpc_gss_principal_t client_principal; /* client name */
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const char *svc_principal; /* server name */
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rpc_gss_service_t service; /* service type */
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} rpc_gss_rawcred_t;
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.Ed
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.It Vt rpc_gss_ucred_t
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Unix credentials which are derived form the raw credentials,
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accessed via
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.Fn rpc_gss_getcred .
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.Bd -literal
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typedef struct {
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uid_t uid; /* user ID */
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gid_t gid; /* group ID */
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short gidlen;
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gid_t *gidlist; /* list of groups */
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} rpc_gss_ucred_t;
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.Ed
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.It Vt rpc_gss_lock_t
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Structure used to enforce a particular QOP and service.
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.Bd -literal
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typedef struct {
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bool_t locked;
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rpc_gss_rawcred_t *raw_cred;
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} rpc_gss_lock_t;
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.Ed
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.It Vt rpc_gss_callback_t
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Callback structure used by
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.Fn rpc_gss_set_callback .
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.Bd -literal
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typedef struct {
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u_int program; /* RPC program number */
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u_int version; /* RPC version number */
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/* user defined callback */
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bool_t (*callback)(struct svc_req *req,
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gss_cred_id_t deleg,
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gss_ctx_id_t gss_context,
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rpc_gss_lock_t *lock,
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void **cookie);
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} rpc_gss_callback_t;
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.Ed
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.It Vt rpc_gss_error_t
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Structure used to return error information by
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.Fn rpc_gss_get_error .
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.Bd -literal
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typedef struct {
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int rpc_gss_error;
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int system_error; /* same as errno */
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} rpc_gss_error_t;
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/*
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* Values for rpc_gss_error
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*/
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#define RPC_GSS_ER_SUCCESS 0 /* no error */
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#define RPC_GSS_ER_SYSTEMERROR 1 /* system error */
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.Ed
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.El
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.Sh INDEX
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.Bl -tag -width "MMMM"
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.It Xr rpc_gss_seccreate 3
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Create a new security context
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.It Xr rpc_gss_set_defaults 3
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Set service and quality of protection for a context
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.It Xr rpc_gss_max_data_length 3
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Calculate maximum client message sizes.
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.It Xr rpc_gss_get_error 3
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Get details of the last error
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.It Xr rpc_gss_mech_to_oid 3
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Convert a mechanism name to the corresponding GSS-API oid.
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.It Xr rpc_gss_oid_to_mech 3
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Convert a GSS-API oid to a mechanism name
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.It Xr rpc_gss_qop_to_num 3
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Convert a quality of protection name to the corresponding number
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.It Xr rpc_gss_get_mechanisms 3
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Get a list of security mechanisms.
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.It Xr rpc_gss_get_mech_info 3
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Return extra information about a security mechanism
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.It Xr rpc_gss_get_versions 3
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Return the maximum and minimum supported versions of the
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.Nm
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protocol
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.It Xr rpc_gss_is_installed 3
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Query for the presence of a particular security mechanism
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.It Xr rpc_gss_set_svc_name 3
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Set the name of a service principal which matches a given RPC program
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plus version pair
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.It Xr rpc_gss_getcred 3
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Get credential details for the security context of an RPC request
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.It Xr rpc_gss_set_callback 3
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Install a callback routine which is called on the server when new
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security contexts are created
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.It Xr rpc_gss_get_principal_name 3
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Create a client principal name from various strings
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.It Xr rpc_gss_svc_max_data_length 3
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Calculate maximum server message sizes.
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.El
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.Sh SEE ALSO
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.Xr rpc 3 ,
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.Xr gssapi 3 ,
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.Xr gss_export_name 3 ,
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.Xr mech 5 ,
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.Xr qop 5 ,
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.Xr rpcset_gss 3
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.Sh HISTORY
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The
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.Nm
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library first appeared in
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.Fx 8.0 .
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.Sh AUTHORS
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This
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manual page was written by
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.An Doug Rabson Aq dfr@FreeBSD.org .
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