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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
*
* $Header$
*/
#include "k5-int.h"
#include <sys/file.h>
#include "policy_db.h"
#define OPENLOCK(db, mode) \
{ \
int olret; \
if (db == NULL) \
return EINVAL; \
else if (db->magic != OSA_ADB_POLICY_DB_MAGIC) \
return OSA_ADB_DBINIT; \
else if ((olret = osa_adb_open_and_lock(db, mode)) != OSA_ADB_OK) \
return olret; \
}
#define CLOSELOCK(db) \
{ \
int cl_ret; \
if ((cl_ret = osa_adb_close_and_unlock(db)) != OSA_ADB_OK) \
return cl_ret; \
}
/*
* Function: osa_adb_create_policy
*
* Purpose: create a policy entry in the policy db.
*
* Arguments:
* entry (input) pointer to the entry to be added
* <return value> OSA_ADB_OK on success, else error code.
*
* Requires:
* entry have a valid name.
*
* Effects:
* creates the entry in the db
*
* Modifies:
* the policy db.
*
*/
krb5_error_code
osa_adb_create_policy(osa_adb_policy_t db, osa_policy_ent_t entry)
{
DBT dbkey;
DBT dbdata;
XDR xdrs;
int ret;
OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE);
if(entry->name == NULL) {
ret = EINVAL;
goto error;
}
dbkey.data = entry->name;
dbkey.size = (strlen(entry->name) + 1);
switch(db->db->get(db->db, &dbkey, &dbdata, 0)) {
case 0:
ret = OSA_ADB_DUP;
goto error;
case 1:
break;
default:
ret = errno;
goto error;
}
xdralloc_create(&xdrs, XDR_ENCODE);
if(!xdr_osa_policy_ent_rec(&xdrs, entry)) {
xdr_destroy(&xdrs);
ret = OSA_ADB_XDR_FAILURE;
goto error;
}
dbdata.data = xdralloc_getdata(&xdrs);
dbdata.size = xdr_getpos(&xdrs);
switch(db->db->put(db->db, &dbkey, &dbdata, R_NOOVERWRITE)) {
case 0:
if((db->db->sync(db->db, 0)) == -1)
ret = OSA_ADB_FAILURE;
ret = OSA_ADB_OK;
break;
case 1:
ret = OSA_ADB_DUP;
break;
default:
ret = OSA_ADB_FAILURE;
break;
}
xdr_destroy(&xdrs);
error:
CLOSELOCK(db);
return ret;
}
/*
* Function: osa_adb_destroy_policy
*
* Purpose: destroy a policy entry
*
* Arguments:
* db (input) database handle
* name (input) name of policy
* <return value> OSA_ADB_OK on success, or error code.
*
* Requires:
* db being valid.
* name being non-null.
* Effects:
* deletes policy from db.
*
* Modifies:
* policy db.
*
*/
krb5_error_code
osa_adb_destroy_policy(osa_adb_policy_t db, char *name)
{
DBT dbkey;
int status, ret;
OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE);
if(name == NULL) {
ret = EINVAL;
goto error;
}
dbkey.data = name;
dbkey.size = (strlen(name) + 1);
status = db->db->del(db->db, &dbkey, 0);
switch(status) {
case 1:
ret = OSA_ADB_NOENT;
goto error;
case 0:
if ((db->db->sync(db->db, 0)) == -1) {
ret = OSA_ADB_FAILURE;
goto error;
}
ret = OSA_ADB_OK;
break;
default:
ret = OSA_ADB_FAILURE;
goto error;
}
error:
CLOSELOCK(db);
return ret;
}
/*
* Function: osa_adb_get_policy
*
* Purpose: retrieve policy
*
* Arguments:
* db (input) db handle
* name (input) name of policy
* entry (output) policy entry
* cnt (inout) Number of entries
* <return value> 0 on success, error code on failure.
*
* Requires:
* Effects:
* Modifies:
*/
krb5_error_code
osa_adb_get_policy(osa_adb_policy_t db, char *name,
osa_policy_ent_t *entry_ptr)
{
DBT dbkey;
DBT dbdata;
XDR xdrs;
int ret;
char *aligned_data = NULL;
osa_policy_ent_t entry = NULL;
*entry_ptr = NULL;
OPENLOCK(db, KRB5_DB_LOCKMODE_SHARED);
if(name == NULL) {
ret = EINVAL;
goto error;
}
dbkey.data = name;
dbkey.size = (strlen(dbkey.data) + 1);
dbdata.data = NULL;
dbdata.size = 0;
switch((db->db->get(db->db, &dbkey, &dbdata, 0))) {
case 1:
ret = KRB5_KDB_NOENTRY;
goto error;
case 0:
break;
default:
ret = OSA_ADB_FAILURE;
goto error;
}
entry = k5alloc(sizeof(*entry), &ret);
if (entry == NULL)
goto error;
aligned_data = k5alloc(dbdata.size, &ret);
if (aligned_data == NULL)
goto error;
memcpy(aligned_data, dbdata.data, dbdata.size);
xdrmem_create(&xdrs, aligned_data, dbdata.size, XDR_DECODE);
if (!xdr_osa_policy_ent_rec(&xdrs, entry)) {
ret = OSA_ADB_FAILURE;
goto error;
}
ret = OSA_ADB_OK;
xdr_destroy(&xdrs);
*entry_ptr = entry;
entry = NULL;
error:
free(aligned_data);
free(entry);
CLOSELOCK(db);
return ret;
}
/*
* Function: osa_adb_put_policy
*
* Purpose: update a policy in the dababase
*
* Arguments:
* db (input) db handle
* entry (input) policy entry
* <return value> 0 on success error code on failure.
*
* Requires:
* [requires]
*
* Effects:
* [effects]
*
* Modifies:
* [modifies]
*
*/
krb5_error_code
osa_adb_put_policy(osa_adb_policy_t db, osa_policy_ent_t entry)
{
DBT dbkey;
DBT dbdata;
DBT tmpdb;
XDR xdrs;
int ret;
OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE);
if(entry->name == NULL) {
ret = EINVAL;
goto error;
}
dbkey.data = entry->name;
dbkey.size = (strlen(entry->name) + 1);
switch(db->db->get(db->db, &dbkey, &tmpdb, 0)) {
case 0:
break;
case 1:
ret = OSA_ADB_NOENT;
goto error;
default:
ret = OSA_ADB_FAILURE;
goto error;
}
xdralloc_create(&xdrs, XDR_ENCODE);
if(!xdr_osa_policy_ent_rec(&xdrs, entry)) {
xdr_destroy(&xdrs);
ret = OSA_ADB_XDR_FAILURE;
goto error;
}
dbdata.data = xdralloc_getdata(&xdrs);
dbdata.size = xdr_getpos(&xdrs);
switch(db->db->put(db->db, &dbkey, &dbdata, 0)) {
case 0:
if((db->db->sync(db->db, 0)) == -1)
ret = OSA_ADB_FAILURE;
ret = OSA_ADB_OK;
break;
default:
ret = OSA_ADB_FAILURE;
break;
}
xdr_destroy(&xdrs);
error:
CLOSELOCK(db);
return ret;
}
/*
* Function: osa_adb_iter_policy
*
* Purpose: iterate over the policy database.
*
* Arguments:
* db (input) db handle
* func (input) fucntion pointer to call
* data opaque data type
* <return value> 0 on success error code on failure
*
* Requires:
* Effects:
* Modifies:
*/
krb5_error_code
osa_adb_iter_policy(osa_adb_policy_t db, osa_adb_iter_policy_func func,
void *data)
{
DBT dbkey,
dbdata;
XDR xdrs;
int ret;
osa_policy_ent_t entry;
char *aligned_data;
OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE); /* hmmm */
if((ret = db->db->seq(db->db, &dbkey, &dbdata, R_FIRST)) == -1) {
ret = errno;
goto error;
}
while (ret == 0) {
if (!(entry = (osa_policy_ent_t) malloc(sizeof(osa_policy_ent_rec)))) {
ret = ENOMEM;
goto error;
}
if(!(aligned_data = (char *) malloc(dbdata.size))) {
ret = ENOMEM;
goto error;
}
memcpy(aligned_data, dbdata.data, dbdata.size);
memset(entry, 0, sizeof(osa_policy_ent_rec));
xdrmem_create(&xdrs, aligned_data, dbdata.size, XDR_DECODE);
if(!xdr_osa_policy_ent_rec(&xdrs, entry)) {
xdr_destroy(&xdrs);
free(aligned_data);
osa_free_policy_ent(entry);
ret = OSA_ADB_FAILURE;
goto error;
}
(*func)(data, entry);
xdr_destroy(&xdrs);
free(aligned_data);
osa_free_policy_ent(entry);
ret = db->db->seq(db->db, &dbkey, &dbdata, R_NEXT);
}
if(ret == -1)
ret = errno;
else ret = OSA_ADB_OK;
error:
CLOSELOCK(db);
return ret;
}
void
osa_free_policy_ent(osa_policy_ent_t val)
{
XDR xdrs;
xdrmem_create(&xdrs, NULL, 0, XDR_FREE);
xdr_osa_policy_ent_rec(&xdrs, val);
free(val);
}
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