/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
*/
/*
* Solaris Kerberos: note that MIT has a file also named store_cred.c with a
* different implementation of store_cred. It differs quite a bit.
*/
#include <k5-int.h>
#include <gssapiP_krb5.h>
#include <memory.h>
#include <assert.h>
#include <syslog.h>
extern uint_t kwarn_add_warning(char *, int);
extern uint_t kwarn_del_warning(char *);
static
OM_uint32
store_init_cred(ct, minor_status, cred, dflt)
krb5_context ct;
OM_uint32 *minor_status;
const krb5_gss_cred_id_t cred;
int dflt;
{
OM_uint32 maj = GSS_S_COMPLETE;
krb5_error_code code;
krb5_ccache ccache = NULL; /* current [file] ccache */
krb5_principal ccprinc = NULL; /* default princ of current ccache */
if (minor_status == NULL)
return (GSS_S_CALL_INACCESSIBLE_WRITE);
*minor_status = 0;
/* Get current ccache -- respect KRB5CCNAME, or use OS default */
if ((code = krb5_cc_default(ct, &ccache))) {
*minor_status = code;
return (GSS_S_FAILURE);
}
/*
* Here we should do something like:
*
* a) take all the initial tickets from the current ccache for
* client principals other than the given cred's
* b) copy them to a tmp MEMORY ccache
* c) copy the given cred's tickets to that same tmp ccache
* d) initialize the current ccache with either the same default
* princ as before (!dflt) or with the input cred's princ as the
* default princ (dflt) and copy the tmp ccache's creds to it.
*
* However, for now we just initialize the current ccache, if
* (dflt), and copy the input cred's tickets to it.
*
* To support the above ideal we'd need a variant of
* krb5_cc_copy_creds(). But then, preserving any tickets from
* the current ccache may be problematic if the ccache has many,
* many service tickets in it as that makes ccache enumeration
* really, really slow; we might want to address ccache perf
* first.
*
* So storing of non-default credentials is not supported.
*/
if (dflt) {
/* Treat this as "caller asks to initialize ccache" */
/* LINTED */
if ((code = krb5_cc_initialize(ct, ccache,
cred->name->princ))) {
*minor_status = code;
maj = GSS_S_FAILURE;
goto cleanup;
}
} else {
*minor_status = (OM_uint32) G_STORE_NON_DEFAULT_CRED_NOSUPP;
maj = GSS_S_FAILURE;
goto cleanup;
}
if ((code = krb5_cc_copy_creds(ct, cred->ccache, ccache))) {
*minor_status = code;
maj = GSS_S_FAILURE;
goto cleanup;
}
cleanup:
if (ccprinc != NULL)
krb5_free_principal(ct, ccprinc);
if (ccache != NULL)
/* LINTED */
krb5_cc_close(ct, ccache);
return (maj);
}
OM_uint32
krb5_gss_store_cred(minor_status, input_cred, cred_usage,
desired_mech, overwrite_cred, default_cred, elements_stored,
cred_usage_stored)
OM_uint32 *minor_status;
const gss_cred_id_t input_cred;
gss_cred_usage_t cred_usage;
gss_OID desired_mech;
OM_uint32 overwrite_cred;
OM_uint32 default_cred;
gss_OID_set *elements_stored;
gss_cred_usage_t *cred_usage_stored;
{
OM_uint32 maj, maj2, min;
krb5_context ctx = NULL;
krb5_gss_cred_id_t cred = (krb5_gss_cred_id_t)input_cred;
krb5_gss_cred_id_t cur_cred = (krb5_gss_cred_id_t)GSS_C_NO_CREDENTIAL;
gss_OID_set desired_mechs = GSS_C_NULL_OID_SET;
OM_uint32 in_time_rec; /* lifetime of input cred */
OM_uint32 cur_time_rec; /* lifetime of current cred */
gss_cred_usage_t in_usage; /* usage of input cred */
gss_name_t in_name = GSS_C_NO_NAME; /* name of input cred */
char *client_name = NULL;
if (input_cred == GSS_C_NO_CREDENTIAL)
return (GSS_S_CALL_INACCESSIBLE_READ);
/* Initialize output parameters */
if (minor_status == NULL)
return (GSS_S_CALL_INACCESSIBLE_WRITE);
*minor_status = 0;
if (elements_stored != NULL)
*elements_stored = GSS_C_NULL_OID_SET;
if (cred_usage_stored != NULL)
*cred_usage_stored = -1; /* need GSS_C_NEITHER! */
/* Sanity check cred_usage */
if (cred_usage != GSS_C_BOTH && cred_usage != GSS_C_INITIATE &&
cred_usage != GSS_C_ACCEPT) {
*minor_status = (OM_uint32) G_BAD_USAGE;
return (GSS_S_CALL_BAD_STRUCTURE);
}
/* Not supported: storing acceptor creds -- short cut now */
if (cred_usage == GSS_C_ACCEPT) {
*minor_status = (OM_uint32) G_STORE_ACCEPTOR_CRED_NOSUPP;
return (GSS_S_FAILURE);
}
if (cred_usage == GSS_C_BOTH)
cred_usage = GSS_C_INITIATE;
min = krb5_gss_init_context(&ctx);
if (min) {
*minor_status = min;
return (GSS_S_FAILURE);
}
/* * Find out the name, lifetime and cred usage of the input cred */
maj = krb5_gss_inquire_cred(minor_status, input_cred,
&in_name, &in_time_rec, &in_usage, NULL);
if (GSS_ERROR(maj))
goto cleanup;
/* Check that the input cred isn't expired */
if (in_time_rec == 0) {
maj = GSS_S_CREDENTIALS_EXPIRED;
goto cleanup;
}
/* The requested and input cred usage must agree */
if (in_usage != cred_usage && cred_usage != GSS_C_BOTH) {
*minor_status = (OM_uint32) G_CRED_USAGE_MISMATCH;
maj = GSS_S_NO_CRED;
goto cleanup;
}
if (in_usage == GSS_C_ACCEPT) {
*minor_status = (OM_uint32) G_STORE_ACCEPTOR_CRED_NOSUPP;
maj = GSS_S_FAILURE;
goto cleanup;
}
/* Get current cred, if any */
if (desired_mech != GSS_C_NULL_OID) {
/* assume that libgss gave us one of our mech OIDs */
maj = gss_create_empty_oid_set(minor_status, &desired_mechs);
if (GSS_ERROR(maj))
return (maj);
maj = gss_add_oid_set_member(minor_status, desired_mech,
&desired_mechs);
if (GSS_ERROR(maj))
goto cleanup;
}
/*
* Handle overwrite_cred option. If overwrite_cred == FALSE
* then we must be careful not to overwrite an existing
* unexpired credential.
*/
maj2 = krb5_gss_acquire_cred(&min,
(default_cred) ? GSS_C_NO_NAME : in_name,
0, desired_mechs, cred_usage,
(gss_cred_id_t *)&cur_cred, NULL,
&cur_time_rec);
if (GSS_ERROR(maj2))
overwrite_cred = 1; /* nothing to overwrite */
if (cur_time_rec > 0 && !overwrite_cred) {
maj = GSS_S_DUPLICATE_ELEMENT; /* would overwrite */
goto cleanup;
}
/* Ready to store -- store_init_cred() handles default_cred */
maj = store_init_cred(ctx, minor_status, cred, default_cred);
if (GSS_ERROR(maj))
goto cleanup;
/* Alert ktkt_warnd(1M) */
maj = krb5_unparse_name(ctx, cred->name->princ, &client_name);
if (GSS_ERROR(maj))
goto cleanup;
(void) kwarn_del_warning(client_name);
if (kwarn_add_warning(client_name, cred->tgt_expire) != 0) {
syslog(LOG_AUTH|LOG_NOTICE,
"store_cred: kwarn_add_warning"
" failed: ktkt_warnd(1M) down? ");
}
free(client_name);
client_name = NULL;
/* Output parameters */
if (cred_usage_stored != NULL)
*cred_usage_stored = GSS_C_INITIATE;
if (elements_stored != NULL) {
maj = gss_create_empty_oid_set(minor_status, elements_stored);
if (GSS_ERROR(maj))
goto cleanup;
maj = gss_add_oid_set_member(minor_status,
(const gss_OID)gss_mech_krb5,
elements_stored);
if (GSS_ERROR(maj)) {
(void) gss_release_oid_set(&min, elements_stored);
*elements_stored = GSS_C_NULL_OID_SET;
goto cleanup;
}
}
cleanup:
if (desired_mechs != GSS_C_NULL_OID_SET)
(void) gss_release_oid_set(&min, &desired_mechs);
if (cur_cred != (krb5_gss_cred_id_t)GSS_C_NO_CREDENTIAL)
(void) krb5_gss_release_cred(&min,
(gss_cred_id_t *)&cur_cred);
if (in_name != GSS_C_NO_NAME)
(void) krb5_gss_release_name(&min, &in_name);
if (ctx)
krb5_free_context(ctx);
return (maj);
}