RPC_GSS_SECCREATE(3) Library Functions Manual RPC_GSS_SECCREATE(3)
NAME
RPCSEC_GSS — GSS-API based authentication for RPC
SYNOPSIS
#include <rpc/rpcsec_gss.h>
DESCRIPTION
RPCSEC_GSS is a security mechanism for the RPC protocol. It uses the Generic Security Service API (GSS-API) to establish a security context between a client and a server and to ensure that all subsequent communication between client and server are properly authenticated. Optionally, extra protection can be applied to the connection. The integrity service uses checksums to ensure that all data sent by a peer is received without modification. The privacy service uses encryption to ensure that no third party can access the data for a connection.
To use this system, an application must first use rpc_gss_seccreate() to establish a security context.
DATA STRUCTURES
Data structures used by RPCSEC_GSS appear below.
rpc_gss_service_t
This type defines the types of security service required for rpc_gss_seccreate().
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 |
} rpc_gss_service_t;
rpc_gss_options_ret_t
This structure contains various optional values which are used while creating a security context.
typedef struct {
|
int |
req_flags; |
/* GSS request bits */ |
||||
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int |
time_req; |
/* requested lifetime */ |
||||
|
gss_cred_id_t |
my_cred; |
/* GSS credential */ |
||||
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gss_channel_bindings_t input_channel_bindings; |
} rpc_gss_options_req_t;
rpc_gss_options_ret_t
Various details of the created security context are returned using this structure.
typedef struct {
|
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; |
|||
|
gss_ctx_id_t |
gss_context; |
|||
|
char |
actual_mechanism[MAX_GSS_MECH]; |
} rpc_gss_options_ret_t;
rpc_gss_principal_t
This type is used to refer to an client principal which is represented in GSS-API exported name form (see gss_export_name(3) for more details). Names in this format may be stored in access control lists or compared with other names in exported name form. This structure is returned by rpc_gss_get_principal_name() and is also referenced by the rpc_gss_rawcred_t structure.
typedef struct {
|
int |
len; |
|||
|
char |
name[1]; |
} *rpc_gss_principal_t;
rpc_gss_rawcred_t
This structure is used to access the raw credentials associated with a security context.
typedef struct {
|
u_int |
version; |
/* RPC version number */ |
||||
|
const char |
*mechanism; |
/* security mechanism */ |
||||
|
const char |
*qop; |
/* quality of protection */ |
||||
|
rpc_gss_principal_t client_principal; /* client name */ |
||||||
|
const char |
*svc_principal; |
/* server name */ |
||||
|
rpc_gss_service_t service; |
/* service type */ |
} rpc_gss_rawcred_t;
rpc_gss_ucred_t
Unix credentials which are derived form the raw credentials, accessed via rpc_gss_getcred().
typedef struct {
|
uid_t |
uid; |
/* user ID */ |
||||
|
gid_t |
gid; |
/* group ID */ |
||||
|
short |
gidlen; |
|||||
|
gid_t |
*gidlist; |
/* list of groups */ |
} rpc_gss_ucred_t;
rpc_gss_lock_t
Structure used to enforce a particular QOP and service.
typedef struct {
|
bool_t |
locked; |
|||
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rpc_gss_rawcred_t *raw_cred; |
} rpc_gss_lock_t;
rpc_gss_callback_t
Callback structure used by rpc_gss_set_callback().
typedef struct {
|
u_int |
program; |
/* RPC program number */ |
||||
|
u_int |
version; |
/* RPC version number */ |
||||
|
/* 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, |
||||||
|
void **cookie); |
} rpc_gss_callback_t;
rpc_gss_error_t
Structure used to return error information by rpc_gss_get_error().
typedef struct {
|
int |
rpc_gss_error; |
|||||
|
int |
system_error; |
/* same as errno */ |
} rpc_gss_error_t;
/*
* Values for rpc_gss_error
*/
|
#define RPC_GSS_ER_SUCCESS |
0 |
/* no error */ |
|||
|
#define RPC_GSS_ER_SYSTEMERROR |
1 |
/* system error */ |
INDEX
rpc_gss_seccreate(3)
Create a new security context
rpc_gss_set_defaults(3)
Set service and quality of protection for a context
rpc_gss_max_data_length(3)
Calculate maximum client message sizes.
rpc_gss_get_error(3)
Get details of the last error
rpc_gss_mech_to_oid(3)
Convert a mechanism name to the corresponding GSS-API oid.
rpc_gss_oid_to_mech(3)
Convert a GSS-API oid to a mechanism name
rpc_gss_qop_to_num(3)
Convert a quality of protection name to the corresponding number
rpc_gss_get_mechanisms(3)
Get a list of security mechanisms.
rpc_gss_get_mech_info(3)
Return extra information about a security mechanism
rpc_gss_get_versions(3)
Return the maximum and minimum supported versions of the RPCSEC_GSS protocol
rpc_gss_is_installed(3)
Query for the presence of a particular security mechanism
rpc_gss_set_svc_name(3)
Set the name of a service principal which matches a given RPC program plus version pair
rpc_gss_getcred(3)
Get credential details for the security context of an RPC request
rpc_gss_set_callback(3)
Install a callback routine which is called on the server when new security contexts are created
rpc_gss_get_principal_name(3)
Create a client principal name from various strings
rpc_gss_svc_max_data_length(3)
Calculate maximum server message sizes.
AVAILABILITY
These functions are part of libtirpc.
SEE ALSO
rpc(3), gssapi(3)
AUTHORS
This manual page was written by Doug Rabson <[email protected]>. GNU January 26, 2010 RPC_GSS_SECCREATE(3)