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the NFS subsystems use five of the rpcsec_gss/kgssapi entry points, but since it was not obvious which others might be useful, all nineteen were included. Basically the nineteen entry points are set in a structure called rpc_gss_entries and inline functions defined in sys/rpc/rpcsec_gss.h check for the entry points being non-NULL and then call them. A default value is returned otherwise. Requested by rwatson. Reviewed by: jhb MFC after: 2 weeks
455 lines
14 KiB
C
455 lines
14 KiB
C
/*-
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* Copyright (c) 2008 Doug Rabson
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* All rights reserved.
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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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*/
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#ifndef _RPCSEC_GSS_H
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#define _RPCSEC_GSS_H
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#include <kgssapi/gssapi.h>
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#ifndef MAX_GSS_MECH
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#define MAX_GSS_MECH 64
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#endif
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/*
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* Define the types of security service required for rpc_gss_seccreate().
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*/
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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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/*
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* Structure containing options for rpc_gss_seccreate().
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*/
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typedef struct {
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int req_flags; /* GSS request bits */
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int time_req; /* requested credential 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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/*
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* Structure containing options returned by rpc_gss_seccreate().
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*/
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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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/*
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* Client principal type. Used as an argument to
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* rpc_gss_get_principal_name(). Also referenced by the
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* rpc_gss_rawcred_t structure.
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*/
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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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/*
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* Structure for raw credentials used by rpc_gss_getcred() and
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* rpc_gss_set_callback().
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*/
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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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/*
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* Unix credentials derived from raw credentials. Returned by
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* rpc_gss_getcred().
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*/
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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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/*
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* Structure used to enforce a particular QOP and service.
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*/
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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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/*
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* Callback structure used by rpc_gss_set_callback().
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*/
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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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/*
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* Structure used to return error information by rpc_gss_get_error()
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*/
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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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__BEGIN_DECLS
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#ifdef _KERNEL
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/*
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* Set up a structure of entry points for the kgssapi module and inline
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* functions named rpc_gss_XXX_call() to use them, so that the kgssapi
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* module doesn't need to be loaded for the NFS modules to work using
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* AUTH_SYS. The kgssapi modules will be loaded by the gssd(8) daemon
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* when it is started up and the entry points will then be filled in.
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*/
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typedef AUTH *rpc_gss_secfind_ftype(CLIENT *clnt, struct ucred *cred,
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const char *principal, gss_OID mech_oid,
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rpc_gss_service_t service);
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typedef void rpc_gss_secpurge_ftype(CLIENT *clnt);
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typedef AUTH *rpc_gss_seccreate_ftype(CLIENT *clnt, struct ucred *cred,
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const char *principal, const char *mechanism,
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rpc_gss_service_t service, const char *qop,
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rpc_gss_options_req_t *options_req,
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rpc_gss_options_ret_t *options_ret);
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typedef bool_t rpc_gss_set_defaults_ftype(AUTH *auth,
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rpc_gss_service_t service, const char *qop);
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typedef int rpc_gss_max_data_length_ftype(AUTH *handle,
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int max_tp_unit_len);
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typedef void rpc_gss_get_error_ftype(rpc_gss_error_t *error);
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typedef bool_t rpc_gss_mech_to_oid_ftype(const char *mech, gss_OID *oid_ret);
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typedef bool_t rpc_gss_oid_to_mech_ftype(gss_OID oid, const char **mech_ret);
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typedef bool_t rpc_gss_qop_to_num_ftype(const char *qop, const char *mech,
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u_int *num_ret);
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typedef const char **rpc_gss_get_mechanisms_ftype(void);
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typedef bool_t rpc_gss_get_versions_ftype(u_int *vers_hi, u_int *vers_lo);
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typedef bool_t rpc_gss_is_installed_ftype(const char *mech);
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typedef bool_t rpc_gss_set_svc_name_ftype(const char *principal,
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const char *mechanism, u_int req_time, u_int program,
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u_int version);
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typedef void rpc_gss_clear_svc_name_ftype(u_int program, u_int version);
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typedef bool_t rpc_gss_getcred_ftype(struct svc_req *req,
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rpc_gss_rawcred_t **rcred,
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rpc_gss_ucred_t **ucred, void **cookie);
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typedef bool_t rpc_gss_set_callback_ftype(rpc_gss_callback_t *cb);
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typedef void rpc_gss_clear_callback_ftype(rpc_gss_callback_t *cb);
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typedef bool_t rpc_gss_get_principal_name_ftype(rpc_gss_principal_t *principal,
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const char *mech, const char *name, const char *node,
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const char *domain);
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typedef int rpc_gss_svc_max_data_length_ftype(struct svc_req *req,
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int max_tp_unit_len);
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struct rpc_gss_entries {
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rpc_gss_secfind_ftype *rpc_gss_secfind;
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rpc_gss_secpurge_ftype *rpc_gss_secpurge;
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rpc_gss_seccreate_ftype *rpc_gss_seccreate;
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rpc_gss_set_defaults_ftype *rpc_gss_set_defaults;
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rpc_gss_max_data_length_ftype *rpc_gss_max_data_length;
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rpc_gss_get_error_ftype *rpc_gss_get_error;
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rpc_gss_mech_to_oid_ftype *rpc_gss_mech_to_oid;
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rpc_gss_oid_to_mech_ftype *rpc_gss_oid_to_mech;
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rpc_gss_qop_to_num_ftype *rpc_gss_qop_to_num;
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rpc_gss_get_mechanisms_ftype *rpc_gss_get_mechanisms;
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rpc_gss_get_versions_ftype *rpc_gss_get_versions;
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rpc_gss_is_installed_ftype *rpc_gss_is_installed;
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rpc_gss_set_svc_name_ftype *rpc_gss_set_svc_name;
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rpc_gss_clear_svc_name_ftype *rpc_gss_clear_svc_name;
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rpc_gss_getcred_ftype *rpc_gss_getcred;
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rpc_gss_set_callback_ftype *rpc_gss_set_callback;
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rpc_gss_clear_callback_ftype *rpc_gss_clear_callback;
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rpc_gss_get_principal_name_ftype *rpc_gss_get_principal_name;
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rpc_gss_svc_max_data_length_ftype *rpc_gss_svc_max_data_length;
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};
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extern struct rpc_gss_entries rpc_gss_entries;
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/* Functions to access the entry points. */
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static __inline AUTH *
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rpc_gss_secfind_call(CLIENT *clnt, struct ucred *cred, const char *principal,
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gss_OID mech_oid, rpc_gss_service_t service)
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{
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AUTH *ret = NULL;
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if (rpc_gss_entries.rpc_gss_secfind != NULL)
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ret = (*rpc_gss_entries.rpc_gss_secfind)(clnt, cred, principal,
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mech_oid, service);
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return (ret);
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}
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static __inline void
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rpc_gss_secpurge_call(CLIENT *clnt)
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{
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if (rpc_gss_entries.rpc_gss_secpurge != NULL)
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(*rpc_gss_entries.rpc_gss_secpurge)(clnt);
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}
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static __inline AUTH *
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rpc_gss_seccreate_call(CLIENT *clnt, struct ucred *cred, const char *principal,
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const char *mechanism, rpc_gss_service_t service, const char *qop,
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rpc_gss_options_req_t *options_req, rpc_gss_options_ret_t *options_ret)
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{
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AUTH *ret = NULL;
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if (rpc_gss_entries.rpc_gss_seccreate != NULL)
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ret = (*rpc_gss_entries.rpc_gss_seccreate)(clnt, cred,
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principal, mechanism, service, qop, options_req,
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options_ret);
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return (ret);
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}
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static __inline bool_t
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rpc_gss_set_defaults_call(AUTH *auth, rpc_gss_service_t service,
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const char *qop)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_set_defaults != NULL)
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ret = (*rpc_gss_entries.rpc_gss_set_defaults)(auth, service,
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qop);
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return (ret);
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}
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static __inline int
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rpc_gss_max_data_length_call(AUTH *handle, int max_tp_unit_len)
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{
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int ret = 0;
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if (rpc_gss_entries.rpc_gss_max_data_length != NULL)
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ret = (*rpc_gss_entries.rpc_gss_max_data_length)(handle,
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max_tp_unit_len);
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return (ret);
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}
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static __inline void
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rpc_gss_get_error_call(rpc_gss_error_t *error)
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{
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if (rpc_gss_entries.rpc_gss_get_error != NULL)
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(*rpc_gss_entries.rpc_gss_get_error)(error);
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}
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static __inline bool_t
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rpc_gss_mech_to_oid_call(const char *mech, gss_OID *oid_ret)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_mech_to_oid != NULL)
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ret = (*rpc_gss_entries.rpc_gss_mech_to_oid)(mech, oid_ret);
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return (ret);
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}
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static __inline bool_t
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rpc_gss_oid_to_mech_call(gss_OID oid, const char **mech_ret)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_oid_to_mech != NULL)
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ret = (*rpc_gss_entries.rpc_gss_oid_to_mech)(oid, mech_ret);
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return (ret);
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}
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static __inline bool_t
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rpc_gss_qop_to_num_call(const char *qop, const char *mech, u_int *num_ret)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_qop_to_num != NULL)
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ret = (*rpc_gss_entries.rpc_gss_qop_to_num)(qop, mech, num_ret);
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return (ret);
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}
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static __inline const char **
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rpc_gss_get_mechanisms_call(void)
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{
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const char **ret = NULL;
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if (rpc_gss_entries.rpc_gss_get_mechanisms != NULL)
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ret = (*rpc_gss_entries.rpc_gss_get_mechanisms)();
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return (ret);
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}
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static __inline bool_t
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rpc_gss_get_versions_call(u_int *vers_hi, u_int *vers_lo)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_get_versions != NULL)
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ret = (*rpc_gss_entries.rpc_gss_get_versions)(vers_hi, vers_lo);
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return (ret);
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}
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static __inline bool_t
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rpc_gss_is_installed_call(const char *mech)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_is_installed != NULL)
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ret = (*rpc_gss_entries.rpc_gss_is_installed)(mech);
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return (ret);
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}
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static __inline bool_t
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rpc_gss_set_svc_name_call(const char *principal, const char *mechanism,
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u_int req_time, u_int program, u_int version)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_set_svc_name != NULL)
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ret = (*rpc_gss_entries.rpc_gss_set_svc_name)(principal,
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mechanism, req_time, program, version);
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return (ret);
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}
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static __inline void
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rpc_gss_clear_svc_name_call(u_int program, u_int version)
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{
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if (rpc_gss_entries.rpc_gss_clear_svc_name != NULL)
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(*rpc_gss_entries.rpc_gss_clear_svc_name)(program, version);
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}
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static __inline bool_t
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rpc_gss_getcred_call(struct svc_req *req, rpc_gss_rawcred_t **rcred,
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rpc_gss_ucred_t **ucred, void **cookie)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_getcred != NULL)
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ret = (*rpc_gss_entries.rpc_gss_getcred)(req, rcred, ucred,
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cookie);
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return (ret);
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}
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static __inline bool_t
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rpc_gss_set_callback_call(rpc_gss_callback_t *cb)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_set_callback != NULL)
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ret = (*rpc_gss_entries.rpc_gss_set_callback)(cb);
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return (ret);
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}
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static __inline void
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rpc_gss_clear_callback_call(rpc_gss_callback_t *cb)
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{
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if (rpc_gss_entries.rpc_gss_clear_callback != NULL)
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(*rpc_gss_entries.rpc_gss_clear_callback)(cb);
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}
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static __inline bool_t
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rpc_gss_get_principal_name_call(rpc_gss_principal_t *principal,
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const char *mech, const char *name, const char *node, const char *domain)
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{
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bool_t ret = 1;
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if (rpc_gss_entries.rpc_gss_get_principal_name != NULL)
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ret = (*rpc_gss_entries.rpc_gss_get_principal_name)(principal,
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mech, name, node, domain);
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return (ret);
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}
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static __inline int
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rpc_gss_svc_max_data_length_call(struct svc_req *req, int max_tp_unit_len)
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{
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int ret = 0;
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if (rpc_gss_entries.rpc_gss_svc_max_data_length != NULL)
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ret = (*rpc_gss_entries.rpc_gss_svc_max_data_length)(req,
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max_tp_unit_len);
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return (ret);
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}
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AUTH *rpc_gss_secfind(CLIENT *clnt, struct ucred *cred,
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const char *principal, gss_OID mech_oid, rpc_gss_service_t service);
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void rpc_gss_secpurge(CLIENT *clnt);
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#endif
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AUTH *rpc_gss_seccreate(CLIENT *clnt, struct ucred *cred,
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const char *principal, const char *mechanism, rpc_gss_service_t service,
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const char *qop, rpc_gss_options_req_t *options_req,
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rpc_gss_options_ret_t *options_ret);
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bool_t rpc_gss_set_defaults(AUTH *auth, rpc_gss_service_t service,
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const char *qop);
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int rpc_gss_max_data_length(AUTH *handle, int max_tp_unit_len);
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void rpc_gss_get_error(rpc_gss_error_t *error);
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bool_t rpc_gss_mech_to_oid(const char *mech, gss_OID *oid_ret);
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bool_t rpc_gss_oid_to_mech(gss_OID oid, const char **mech_ret);
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bool_t rpc_gss_qop_to_num(const char *qop, const char *mech, u_int *num_ret);
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const char **rpc_gss_get_mechanisms(void);
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const char **rpc_gss_get_mech_info(const char *mech, rpc_gss_service_t *service);
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bool_t rpc_gss_get_versions(u_int *vers_hi, u_int *vers_lo);
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bool_t rpc_gss_is_installed(const char *mech);
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bool_t rpc_gss_set_svc_name(const char *principal, const char *mechanism,
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u_int req_time, u_int program, u_int version);
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void rpc_gss_clear_svc_name(u_int program, u_int version);
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bool_t rpc_gss_getcred(struct svc_req *req, rpc_gss_rawcred_t **rcred,
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rpc_gss_ucred_t **ucred, void **cookie);
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bool_t rpc_gss_set_callback(rpc_gss_callback_t *cb);
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void rpc_gss_clear_callback(rpc_gss_callback_t *cb);
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bool_t rpc_gss_get_principal_name(rpc_gss_principal_t *principal,
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const char *mech, const char *name, const char *node, const char *domain);
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int rpc_gss_svc_max_data_length(struct svc_req *req, int max_tp_unit_len);
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/*
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* Internal interface from the RPC implementation.
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*/
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#ifndef _KERNEL
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bool_t __rpc_gss_wrap(AUTH *auth, void *header, size_t headerlen,
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XDR* xdrs, xdrproc_t xdr_args, void *args_ptr);
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bool_t __rpc_gss_unwrap(AUTH *auth, XDR* xdrs, xdrproc_t xdr_args,
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void *args_ptr);
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#endif
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bool_t __rpc_gss_set_error(int rpc_gss_error, int system_error);
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__END_DECLS
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#endif /* !_RPCSEC_GSS_H */
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