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/*
* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: gssapictx.c,v 1.3.2.1.8.1 2004/03/06 08:14:21 marka Exp $ */
#include <config.h>
#include <stdlib.h>
#include <isc/buffer.h>
#include <isc/dir.h>
#include <isc/entropy.h>
#include <isc/lex.h>
#include <isc/mem.h>
#include <isc/once.h>
#include <isc/random.h>
#include <isc/string.h>
#include <isc/time.h>
#include <isc/util.h>
#include <dns/fixedname.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/result.h>
#include <dns/types.h>
#include <dns/keyvalues.h>
#include <dst/gssapi.h>
#include <dst/result.h>
#include "dst_internal.h"
#ifdef GSSAPI
#include <gssapi/gssapi.h>
#define RETERR(x) do { \
result = (x); \
if (result != ISC_R_SUCCESS) \
goto out; \
} while (0)
#define REGION_TO_GBUFFER(r, gb) \
do { \
(gb).length = (r).length; \
(gb).value = (r).base; \
} while (0)
#define GBUFFER_TO_REGION(gb, r) \
do { \
(r).length = (gb).length; \
(r).base = (gb).value; \
} while (0)
static inline void
name_to_gbuffer(dns_name_t *name, isc_buffer_t *buffer,
gss_buffer_desc *gbuffer)
{
dns_name_t tname, *namep;
isc_region_t r;
isc_result_t result;
if (!dns_name_isabsolute(name))
namep = name;
else {
unsigned int labels;
dns_name_init(&tname, NULL);
labels = dns_name_countlabels(name);
dns_name_getlabelsequence(name, 0, labels - 1, &tname);
namep = &tname;
}
result = dns_name_totext(namep, ISC_FALSE, buffer);
isc_buffer_putuint8(buffer, 0);
isc_buffer_usedregion(buffer, &r);
REGION_TO_GBUFFER(r, *gbuffer);
}
isc_result_t
dst_gssapi_acquirecred(dns_name_t *name, isc_boolean_t initiate, void **cred) {
isc_buffer_t namebuf;
gss_name_t gname;
gss_buffer_desc gnamebuf;
unsigned char array[DNS_NAME_MAXTEXT + 1];
OM_uint32 gret, minor;
gss_OID_set mechs;
OM_uint32 lifetime;
gss_cred_usage_t usage;
REQUIRE(cred != NULL && *cred == NULL);
if (name != NULL) {
isc_buffer_init(&namebuf, array, sizeof(array));
name_to_gbuffer(name, &namebuf, &gnamebuf);
gret = gss_import_name(&minor, &gnamebuf, GSS_C_NO_OID,
&gname);
if (gret != GSS_S_COMPLETE)
return (ISC_R_FAILURE);
} else
gname = NULL;
if (initiate)
usage = GSS_C_INITIATE;
else
usage = GSS_C_ACCEPT;
gret = gss_acquire_cred(&minor, gname, GSS_C_INDEFINITE,
GSS_C_NO_OID_SET, usage,
cred, &mechs, &lifetime);
if (gret != GSS_S_COMPLETE)
return (ISC_R_FAILURE);
return (ISC_R_SUCCESS);
}
isc_result_t
dst_gssapi_initctx(dns_name_t *name, void *cred,
isc_region_t *intoken, isc_buffer_t *outtoken,
void **context)
{
isc_region_t r;
isc_buffer_t namebuf;
gss_buffer_desc gnamebuf, gintoken, *gintokenp, gouttoken;
OM_uint32 gret, minor, flags, ret_flags;
gss_OID mech_type, ret_mech_type;
OM_uint32 lifetime;
gss_name_t gname;
isc_result_t result;
unsigned char array[DNS_NAME_MAXTEXT + 1];
isc_buffer_init(&namebuf, array, sizeof(array));
name_to_gbuffer(name, &namebuf, &gnamebuf);
gret = gss_import_name(&minor, &gnamebuf, GSS_C_NO_OID, &gname);
if (gret != GSS_S_COMPLETE)
return (ISC_R_FAILURE);
if (intoken != NULL) {
REGION_TO_GBUFFER(*intoken, gintoken);
gintokenp = &gintoken;
} else
gintokenp = NULL;
if (*context == NULL)
*context = GSS_C_NO_CONTEXT;
flags = GSS_C_REPLAY_FLAG | GSS_C_MUTUAL_FLAG | GSS_C_DELEG_FLAG |
GSS_C_SEQUENCE_FLAG | GSS_C_CONF_FLAG | GSS_C_INTEG_FLAG;
mech_type = GSS_C_NO_OID;
gret = gss_init_sec_context(&minor, cred, context, gname,
mech_type, flags, 0,
GSS_C_NO_CHANNEL_BINDINGS, gintokenp,
&ret_mech_type, &gouttoken, &ret_flags,
&lifetime);
if (gret != GSS_S_COMPLETE && gret != GSS_S_CONTINUE_NEEDED)
return (ISC_R_FAILURE);
GBUFFER_TO_REGION(gouttoken, r);
RETERR(isc_buffer_copyregion(outtoken, &r));
if (gret == GSS_S_COMPLETE)
return (ISC_R_SUCCESS);
else
return (DNS_R_CONTINUE);
out:
return (result);
}
isc_result_t
dst_gssapi_acceptctx(dns_name_t *name, void *cred,
isc_region_t *intoken, isc_buffer_t *outtoken,
void **context)
{
isc_region_t r;
isc_buffer_t namebuf;
gss_buffer_desc gnamebuf, gintoken, gouttoken;
OM_uint32 gret, minor, flags;
gss_OID mech_type;
OM_uint32 lifetime;
gss_cred_id_t delegated_cred;
gss_name_t gname;
isc_result_t result;
unsigned char array[DNS_NAME_MAXTEXT + 1];
isc_buffer_init(&namebuf, array, sizeof(array));
name_to_gbuffer(name, &namebuf, &gnamebuf);
gret = gss_import_name(&minor, &gnamebuf, GSS_C_NO_OID, &gname);
if (gret != GSS_S_COMPLETE)
return (ISC_R_FAILURE);
REGION_TO_GBUFFER(*intoken, gintoken);
if (*context == NULL)
*context = GSS_C_NO_CONTEXT;
gret = gss_accept_sec_context(&minor, context, cred, &gintoken,
GSS_C_NO_CHANNEL_BINDINGS, gname,
&mech_type, &gouttoken, &flags,
&lifetime, &delegated_cred);
if (gret != GSS_S_COMPLETE)
return (ISC_R_FAILURE);
GBUFFER_TO_REGION(gouttoken, r);
RETERR(isc_buffer_copyregion(outtoken, &r));
return (ISC_R_SUCCESS);
out:
return (result);
}
#else
isc_result_t
dst_gssapi_acquirecred(dns_name_t *name, isc_boolean_t initiate, void **cred) {
UNUSED(name);
UNUSED(initiate);
UNUSED(cred);
return (ISC_R_NOTIMPLEMENTED);
}
isc_result_t
dst_gssapi_initctx(dns_name_t *name, void *cred,
isc_region_t *intoken, isc_buffer_t *outtoken,
void **context)
{
UNUSED(name);
UNUSED(cred);
UNUSED(intoken);
UNUSED(outtoken);
UNUSED(context);
return (ISC_R_NOTIMPLEMENTED);
}
isc_result_t
dst_gssapi_acceptctx(dns_name_t *name, void *cred,
isc_region_t *intoken, isc_buffer_t *outtoken,
void **context)
{
UNUSED(name);
UNUSED(cred);
UNUSED(intoken);
UNUSED(outtoken);
UNUSED(context);
return (ISC_R_NOTIMPLEMENTED);
}
#endif
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