/* #ident  "@(#)mglueP.h 1.2     96/01/18 SMI" */

/*
 * This header contains the private mechglue definitions.
 *
 * Copyright (c) 1995, by Sun Microsystems, Inc.
 * All rights reserved.
 */

#ifndef _GSS_MECHGLUEP_H
#define _GSS_MECHGLUEP_H

#include "autoconf.h"
#include "mechglue.h"
#include "gssapiP_generic.h"

#define	g_OID_copy(o1, o2)					\
do {								\
	memcpy((o1)->elements, (o2)->elements, (o2)->length);	\
	(o1)->length = (o2)->length;				\
} while (0)

#define	GSS_EMPTY_BUFFER(buf)	((buf) == NULL ||\
	(buf)->value == NULL || (buf)->length == 0)

/*
 * Array of context IDs typed by mechanism OID
 */
typedef struct gss_ctx_id_struct {
	struct gss_ctx_id_struct *loopback;
	gss_OID			mech_type;
	gss_ctx_id_t		internal_ctx_id;
} gss_union_ctx_id_desc, *gss_union_ctx_id_t;

/*
 * Generic GSSAPI names.  A name can either be a generic name, or a
 * mechanism specific name....
 */
typedef struct gss_name_struct {
	struct gss_name_struct *loopback;
	gss_OID			name_type;
	gss_buffer_t		external_name;
	/*
	 * These last two fields are only filled in for mechanism
	 * names.
	 */
	gss_OID			mech_type;
	gss_name_t		mech_name;
} gss_union_name_desc, *gss_union_name_t;

/*
 * Structure for holding list of mechanism-specific name types
 */
typedef struct gss_mech_spec_name_t {
    gss_OID	name_type;
    gss_OID	mech;
    struct gss_mech_spec_name_t	*next, *prev;
} gss_mech_spec_name_desc, *gss_mech_spec_name;

/*
 * Credential auxiliary info, used in the credential structure
 */
typedef struct gss_union_cred_auxinfo {
	gss_buffer_desc		name;
	gss_OID			name_type;
	OM_uint32		creation_time;
	OM_uint32		time_rec;
	int			cred_usage;
} gss_union_cred_auxinfo;

/*
 * Set of Credentials typed on mechanism OID
 */
typedef struct gss_cred_id_struct {
	struct gss_cred_id_struct *loopback;
	int			count;
	gss_OID			mechs_array;
	gss_cred_id_t		*cred_array;
	gss_union_cred_auxinfo	auxinfo;
} gss_union_cred_desc, *gss_union_cred_t;
 
/*
 * Rudimentary pointer validation macro to check whether the
 * "loopback" field of an opaque struct points back to itself.  This
 * field also catches some programming errors where an opaque pointer
 * is passed to a function expecting the address of the opaque
 * pointer.
 */
#define GSSINT_CHK_LOOP(p) (!((p) != NULL && (p)->loopback == (p)))

/********************************************************/
/* The Mechanism Dispatch Table -- a mechanism needs to */
/* define one of these and provide a function to return */
/* it to initialize the GSSAPI library                  */

/*
 * This is the definition of the mechs_array struct, which is used to
 * define the mechs array table. This table is used to indirectly
 * access mechanism specific versions of the gssapi routines through
 * the routines in the glue module (gssd_mech_glue.c)
 *
 * This contants all of the functions defined in gssapi.h except for
 * gss_release_buffer() and gss_release_oid_set(), which I am
 * assuming, for now, to be equal across mechanisms.  
 */
 
typedef struct gss_config {
    OM_uint32	    priority;
    char *	    mechNameStr;
    gss_OID_desc    mech_type;
    void *	    context;
    OM_uint32       (*gss_acquire_cred)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_name_t,		/* desired_name */
		    OM_uint32,		/* time_req */
		    gss_OID_set,	/* desired_mechs */
		    int,		/* cred_usage */
		    gss_cred_id_t*,	/* output_cred_handle */
		    gss_OID_set*,	/* actual_mechs */
		    OM_uint32*		/* time_rec */
		    );
    OM_uint32       (*gss_release_cred)
	(
		    void*,		/* context */		       
		    OM_uint32*,		/* minor_status */
		    gss_cred_id_t*	/* cred_handle */
		    );
    OM_uint32       (*gss_init_sec_context)
	(
		    void*,			/* context */
		    OM_uint32*,			/* minor_status */
		    gss_cred_id_t,		/* claimant_cred_handle */
		    gss_ctx_id_t*,		/* context_handle */
		    gss_name_t,			/* target_name */
		    gss_OID,			/* mech_type */
		    OM_uint32,			/* req_flags */
		    OM_uint32,			/* time_req */
		    gss_channel_bindings_t,	/* input_chan_bindings */
		    gss_buffer_t,		/* input_token */
		    gss_OID*,			/* actual_mech_type */
		    gss_buffer_t,		/* output_token */
		    OM_uint32*,			/* ret_flags */
		    OM_uint32*			/* time_rec */
		    );
    OM_uint32       (*gss_accept_sec_context)
	(
		    void*,			/* context */
		    OM_uint32*,			/* minor_status */
		    gss_ctx_id_t*,		/* context_handle */
		    gss_cred_id_t,		/* verifier_cred_handle */
		    gss_buffer_t,		/* input_token_buffer */
		    gss_channel_bindings_t,	/* input_chan_bindings */
		    gss_name_t*,		/* src_name */
		    gss_OID*,			/* mech_type */
		    gss_buffer_t,		/* output_token */
		    OM_uint32*,			/* ret_flags */
		    OM_uint32*,			/* time_rec */
		    gss_cred_id_t*		/* delegated_cred_handle */
		    );
    OM_uint32       (*gss_process_context_token)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    gss_buffer_t	/* token_buffer */
		    );
    OM_uint32       (*gss_delete_sec_context)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t*,	/* context_handle */
		    gss_buffer_t	/* output_token */
		    );
    OM_uint32       (*gss_context_time)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    OM_uint32*		/* time_rec */
		    );
    OM_uint32       (*gss_sign)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    int,		/* qop_req */
		    gss_buffer_t,	/* message_buffer */
		    gss_buffer_t	/* message_token */
		    );
    OM_uint32       (*gss_verify)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    gss_buffer_t,	/* message_buffer */
		    gss_buffer_t,	/* token_buffer */
		    int*		/* qop_state */
		    );
    OM_uint32       (*gss_seal)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    int,		/* conf_req_flag */
		    int,		/* qop_req */
		    gss_buffer_t,	/* input_message_buffer */
		    int*,		/* conf_state */
		    gss_buffer_t	/* output_message_buffer */
		    );
    OM_uint32       (*gss_unseal)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    gss_buffer_t,	/* input_message_buffer */
		    gss_buffer_t,	/* output_message_buffer */
		    int*,		/* conf_state */
		    int*		/* qop_state */
		    );
    OM_uint32       (*gss_display_status)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    OM_uint32,		/* status_value */
		    int,		/* status_type */
		    gss_OID,		/* mech_type */
		    OM_uint32*,		/* message_context */
		    gss_buffer_t	/* status_string */
		    );
    OM_uint32       (*gss_indicate_mechs)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_OID_set*	/* mech_set */
		    );
    OM_uint32       (*gss_compare_name)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_name_t,		/* name1 */
		    gss_name_t,		/* name2 */
		    int*		/* name_equal */
		    );
    OM_uint32       (*gss_display_name)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_name_t,		/* input_name */
		    gss_buffer_t,	/* output_name_buffer */
		    gss_OID*		/* output_name_type */
		    );
    OM_uint32       (*gss_import_name)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_buffer_t,	/* input_name_buffer */
		    gss_OID,		/* input_name_type */
		    gss_name_t*		/* output_name */
		    );
    OM_uint32       (*gss_release_name)
	(
		    void*,		/* context */
		    OM_uint32*,		/* minor_status */
		    gss_name_t*		/* input_name */
		    );
    OM_uint32       (*gss_inquire_cred)
	(
		    void*,			/* context */
		    OM_uint32 *,		/* minor_status */
		    gss_cred_id_t,		/* cred_handle */
		    gss_name_t *,		/* name */
		    OM_uint32 *,		/* lifetime */
		    int *,			/* cred_usage */
		    gss_OID_set *		/* mechanisms */
		    );
    OM_uint32	    (*gss_add_cred)
	(
		    void*,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_cred_id_t,	/* input_cred_handle */
		    gss_name_t,		/* desired_name */
		    gss_OID,		/* desired_mech */
		    gss_cred_usage_t,	/* cred_usage */
		    OM_uint32,		/* initiator_time_req */
		    OM_uint32,		/* acceptor_time_req */
		    gss_cred_id_t *,	/* output_cred_handle */
		    gss_OID_set *,	/* actual_mechs */
		    OM_uint32 *,	/* initiator_time_rec */
		    OM_uint32 *		/* acceptor_time_rec */
		    );
    OM_uint32	    (*gss_export_sec_context)
	(
		    void*,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_ctx_id_t *,	/* context_handle */
		    gss_buffer_t	/* interprocess_token */
		    );
    OM_uint32	    (*gss_import_sec_context)
	(
		    void *,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_buffer_t,	/* interprocess_token */
		    gss_ctx_id_t *	/* context_handle */
		    );
    OM_uint32 	    (*gss_inquire_cred_by_mech)
	(
		    void *,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_cred_id_t,	/* cred_handle */
		    gss_OID,		/* mech_type */
		    gss_name_t *,	/* name */
		    OM_uint32 *,	/* initiator_lifetime */
		    OM_uint32 *,	/* acceptor_lifetime */
		    gss_cred_usage_t *	/* cred_usage */
		    );
    OM_uint32	    (*gss_inquire_names_for_mech)
	(
		    void *,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_OID,		/* mechanism */
		    gss_OID_set *	/* name_types */
		    );
    OM_uint32	(*gss_inquire_context)
	(
		    void *,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    gss_name_t *,	/* src_name */
		    gss_name_t *,	/* targ_name */
		    OM_uint32 *,	/* lifetime_rec */
		    gss_OID *,		/* mech_type */
		    OM_uint32 *,	/* ctx_flags */
		    int *,           	/* locally_initiated */
		    int *		/* open */
		    );
    OM_uint32	    (*gss_internal_release_oid)
	(
		    void *,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_OID *		/* OID */
	 );
    OM_uint32	     (*gss_wrap_size_limit)
	(
		    void *,		/* context */
		    OM_uint32 *,	/* minor_status */
		    gss_ctx_id_t,	/* context_handle */
		    int,		/* conf_req_flag */
		    gss_qop_t,		/* qop_req */
		    OM_uint32,		/* req_output_size */
		    OM_uint32 *		/* max_input_size */
	 );
	OM_uint32		(*gss_export_name)
	(
		void *,			/* context */
		OM_uint32 *,		/* minor_status */
		const gss_name_t,	/* input_name */
		gss_buffer_t		/* exported_name */
	/* */);
	OM_uint32	(*gss_store_cred)
	(
		void *,			/* context */
		OM_uint32 *,		/* minor_status */
		const gss_cred_id_t,	/* input_cred */
		gss_cred_usage_t,	/* cred_usage */
		const gss_OID,		/* desired_mech */
		OM_uint32,		/* overwrite_cred */
		OM_uint32,		/* default_cred */
		gss_OID_set *,		/* elements_stored */
		gss_cred_usage_t *	/* cred_usage_stored */
	/* */);
} *gss_mechanism;

/*
 * In the user space we use a wrapper structure to encompass the
 * mechanism entry points.  The wrapper contain the mechanism
 * entry points and other data which is only relevant to the gss-api
 * layer.  In the kernel we use only the gss_config strucutre because
 * the kernal does not cantain any of the extra gss-api specific data.
 */
typedef struct gss_mech_config {
	char *kmodName;			/* kernel module name */
	char *uLibName;			/* user library name */
	char *mechNameStr;		/* mechanism string name */
	char *optionStr;		/* optional mech parameters */
	void *dl_handle;		/* RTLD object handle for the mech */
	gss_OID mech_type;		/* mechanism oid */
	gss_mechanism mech;		/* mechanism initialization struct */
	struct gss_mech_config *next;	/* next element in the list */
} *gss_mech_info;

/********************************************************/
/* Internal mechglue routines */

int gssint_mechglue_init(void);
void gssint_mechglue_fini(void);

gss_mechanism gssint_get_mechanism (gss_OID);
OM_uint32 gssint_get_mech_type (gss_OID, gss_buffer_t);
char *gssint_get_kmodName(const gss_OID);
char *gssint_get_modOptions(const gss_OID);
OM_uint32 gssint_import_internal_name (OM_uint32 *, gss_OID, gss_union_name_t,
				      gss_name_t *);
OM_uint32 gssint_export_internal_name(OM_uint32 *, const gss_OID,
	const gss_name_t, gss_buffer_t);
OM_uint32 gssint_display_internal_name (OM_uint32 *, gss_OID, gss_name_t,
				       gss_buffer_t, gss_OID *);
OM_uint32 gssint_release_internal_name (OM_uint32 *, gss_OID, gss_name_t *);

OM_uint32 gssint_convert_name_to_union_name
	  (OM_uint32 *,		/* minor_status */
	   gss_mechanism,	/* mech */
	   gss_name_t,		/* internal_name */
	   gss_name_t *		/* external_name */
	   );
gss_cred_id_t gssint_get_mechanism_cred
	  (gss_union_cred_t,	/* union_cred */
	   gss_OID		/* mech_type */
	   );

OM_uint32 gssint_create_copy_buffer(
	const gss_buffer_t,	/* src buffer */
	gss_buffer_t *,		/* destination buffer */
	int			/* NULL terminate buffer ? */
);

OM_uint32 gssint_copy_oid_set(
	OM_uint32 *,			/* minor_status */
	const gss_OID_set_desc *,	/* oid set */
	gss_OID_set *			/* new oid set */
);

gss_OID gss_find_mechanism_from_name_type (gss_OID); /* name_type */

OM_uint32 gss_add_mech_name_type
	   (OM_uint32 *,	/* minor_status */
	    gss_OID,		/* name_type */
	    gss_OID		/* mech */
	       );

/*
 * Sun extensions to GSS-API v2
 */

OM_uint32
gssint_mech_to_oid(
	const char *mech,		/* mechanism string name */
	gss_OID *oid			/* mechanism oid */
);

const char *
gssint_oid_to_mech(
	const gss_OID oid		/* mechanism oid */
);

OM_uint32
gssint_get_mechanisms(
	char *mechArray[],		/* array to populate with mechs */
	int arrayLen			/* length of passed in array */
);

OM_uint32
gss_store_cred(
	OM_uint32 *,		/* minor_status */
	const gss_cred_id_t,	/* input_cred_handle */
	gss_cred_usage_t,	/* cred_usage */
	const gss_OID,		/* desired_mech */
	OM_uint32,		/* overwrite_cred */
	OM_uint32,		/* default_cred */
	gss_OID_set *,		/* elements_stored */
	gss_cred_usage_t *	/* cred_usage_stored */
);

int
gssint_get_der_length(
	unsigned char **,	/* buf */
	unsigned int,		/* buf_len */
	unsigned int *		/* bytes */
);

unsigned int
gssint_der_length_size(unsigned int /* len */);

int
gssint_put_der_length(
	unsigned int,		/* length */
	unsigned char **,	/* buf */
	unsigned int		/* max_len */
);

#endif /* _GSS_MECHGLUEP_H */