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6850d6a65f8648c86b78c6ce0450c8a45ac09d0d
heimdal/lib/gssapi/krb5/init_sec_context.c
Jeffrey Altman 6850d6a65f avoid uninit variable and unreachable code warnings 
most of these warnings are not problems because of ample
use of abort() calls.  However, the large number of warnings
makes it difficult to identify real problems.  Initialize
the variables to shut up the compilers.

Change-Id: I8477c11b17c7b6a7d9074c721fdd2d7303b186a8
2011-05-17 12:02:16 -04:00

1016 lines
24 KiB
C
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/*
* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "gsskrb5_locl.h"
/*
* copy the addresses from `input_chan_bindings' (if any) to
* the auth context `ac'
*/
static OM_uint32
set_addresses (krb5_context context,
krb5_auth_context ac,
const gss_channel_bindings_t input_chan_bindings)
{
/* Port numbers are expected to be in application_data.value,
* initator's port first */
krb5_address initiator_addr, acceptor_addr;
krb5_error_code kret;
if (input_chan_bindings == GSS_C_NO_CHANNEL_BINDINGS
|| input_chan_bindings->application_data.length !=
2 * sizeof(ac->local_port))
return 0;
memset(&initiator_addr, 0, sizeof(initiator_addr));
memset(&acceptor_addr, 0, sizeof(acceptor_addr));
ac->local_port =
*(int16_t *) input_chan_bindings->application_data.value;
ac->remote_port =
*((int16_t *) input_chan_bindings->application_data.value + 1);
kret = _gsskrb5i_address_to_krb5addr(context,
input_chan_bindings->acceptor_addrtype,
&input_chan_bindings->acceptor_address,
ac->remote_port,
&acceptor_addr);
if (kret)
return kret;
kret = _gsskrb5i_address_to_krb5addr(context,
input_chan_bindings->initiator_addrtype,
&input_chan_bindings->initiator_address,
ac->local_port,
&initiator_addr);
if (kret) {
krb5_free_address (context, &acceptor_addr);
return kret;
}
kret = krb5_auth_con_setaddrs(context,
ac,
&initiator_addr, /* local address */
&acceptor_addr); /* remote address */
krb5_free_address (context, &initiator_addr);
krb5_free_address (context, &acceptor_addr);
#if 0
free(input_chan_bindings->application_data.value);
input_chan_bindings->application_data.value = NULL;
input_chan_bindings->application_data.length = 0;
#endif
return kret;
}
OM_uint32
_gsskrb5_create_ctx(
OM_uint32 * minor_status,
gss_ctx_id_t * context_handle,
krb5_context context,
const gss_channel_bindings_t input_chan_bindings,
enum gss_ctx_id_t_state state)
{
krb5_error_code kret;
gsskrb5_ctx ctx;
*context_handle = NULL;
ctx = malloc(sizeof(*ctx));
if (ctx == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
ctx->auth_context = NULL;
ctx->deleg_auth_context = NULL;
ctx->source = NULL;
ctx->target = NULL;
ctx->kcred = NULL;
ctx->ccache = NULL;
ctx->state = state;
ctx->flags = 0;
ctx->more_flags = 0;
ctx->service_keyblock = NULL;
ctx->ticket = NULL;
krb5_data_zero(&ctx->fwd_data);
ctx->lifetime = GSS_C_INDEFINITE;
ctx->order = NULL;
ctx->crypto = NULL;
HEIMDAL_MUTEX_init(&ctx->ctx_id_mutex);
kret = krb5_auth_con_init (context, &ctx->auth_context);
if (kret) {
*minor_status = kret;
HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
return GSS_S_FAILURE;
}
kret = krb5_auth_con_init (context, &ctx->deleg_auth_context);
if (kret) {
*minor_status = kret;
krb5_auth_con_free(context, ctx->auth_context);
HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
return GSS_S_FAILURE;
}
kret = set_addresses(context, ctx->auth_context, input_chan_bindings);
if (kret) {
*minor_status = kret;
krb5_auth_con_free(context, ctx->auth_context);
krb5_auth_con_free(context, ctx->deleg_auth_context);
HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
return GSS_S_BAD_BINDINGS;
}
kret = set_addresses(context, ctx->deleg_auth_context, input_chan_bindings);
if (kret) {
*minor_status = kret;
krb5_auth_con_free(context, ctx->auth_context);
krb5_auth_con_free(context, ctx->deleg_auth_context);
HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
return GSS_S_BAD_BINDINGS;
}
/*
* We need a sequence number
*/
krb5_auth_con_addflags(context,
ctx->auth_context,
KRB5_AUTH_CONTEXT_DO_SEQUENCE |
KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED,
NULL);
/*
* We need a sequence number
*/
krb5_auth_con_addflags(context,
ctx->deleg_auth_context,
KRB5_AUTH_CONTEXT_DO_SEQUENCE |
KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED,
NULL);
*context_handle = (gss_ctx_id_t)ctx;
return GSS_S_COMPLETE;
}
static OM_uint32
gsskrb5_get_creds(
OM_uint32 * minor_status,
krb5_context context,
krb5_ccache ccache,
gsskrb5_ctx ctx,
const gss_name_t target_name,
int use_dns,
OM_uint32 time_req,
OM_uint32 * time_rec)
{
OM_uint32 ret;
krb5_error_code kret;
krb5_creds this_cred;
OM_uint32 lifetime_rec;
if (ctx->target) {
krb5_free_principal(context, ctx->target);
ctx->target = NULL;
}
if (ctx->kcred) {
krb5_free_creds(context, ctx->kcred);
ctx->kcred = NULL;
}
ret = _gsskrb5_canon_name(minor_status, context, use_dns,
ctx->source, target_name, &ctx->target);
if (ret)
return ret;
memset(&this_cred, 0, sizeof(this_cred));
this_cred.client = ctx->source;
this_cred.server = ctx->target;
if (time_req && time_req != GSS_C_INDEFINITE) {
krb5_timestamp ts;
krb5_timeofday (context, &ts);
this_cred.times.endtime = ts + time_req;
} else {
this_cred.times.endtime = 0;
}
this_cred.session.keytype = KEYTYPE_NULL;
kret = krb5_get_credentials(context,
0,
ccache,
&this_cred,
&ctx->kcred);
if (kret) {
*minor_status = kret;
return GSS_S_FAILURE;
}
ctx->lifetime = ctx->kcred->times.endtime;
ret = _gsskrb5_lifetime_left(minor_status, context,
ctx->lifetime, &lifetime_rec);
if (ret) return ret;
if (lifetime_rec == 0) {
*minor_status = 0;
return GSS_S_CONTEXT_EXPIRED;
}
if (time_rec) *time_rec = lifetime_rec;
return GSS_S_COMPLETE;
}
static OM_uint32
gsskrb5_initiator_ready(
OM_uint32 * minor_status,
gsskrb5_ctx ctx,
krb5_context context)
{
OM_uint32 ret;
int32_t seq_number;
int is_cfx = 0;
OM_uint32 flags = ctx->flags;
krb5_free_creds(context, ctx->kcred);
ctx->kcred = NULL;
if (ctx->more_flags & CLOSE_CCACHE)
krb5_cc_close(context, ctx->ccache);
ctx->ccache = NULL;
krb5_auth_con_getremoteseqnumber (context, ctx->auth_context, &seq_number);
_gsskrb5i_is_cfx(context, ctx, 0);
is_cfx = (ctx->more_flags & IS_CFX);
ret = _gssapi_msg_order_create(minor_status,
&ctx->order,
_gssapi_msg_order_f(flags),
seq_number, 0, is_cfx);
if (ret) return ret;
ctx->state = INITIATOR_READY;
ctx->more_flags |= OPEN;
return GSS_S_COMPLETE;
}
/*
* handle delegated creds in init-sec-context
*/
static void
do_delegation (krb5_context context,
krb5_auth_context ac,
krb5_ccache ccache,
krb5_creds *cred,
krb5_const_principal name,
krb5_data *fwd_data,
uint32_t flagmask,
uint32_t *flags)
{
krb5_creds creds;
KDCOptions fwd_flags;
krb5_error_code kret;
memset (&creds, 0, sizeof(creds));
krb5_data_zero (fwd_data);
kret = krb5_cc_get_principal(context, ccache, &creds.client);
if (kret)
goto out;
kret = krb5_make_principal(context,
&creds.server,
creds.client->realm,
KRB5_TGS_NAME,
creds.client->realm,
NULL);
if (kret)
goto out;
creds.times.endtime = 0;
memset(&fwd_flags, 0, sizeof(fwd_flags));
fwd_flags.forwarded = 1;
fwd_flags.forwardable = 1;
if ( /*target_name->name.name_type != KRB5_NT_SRV_HST ||*/
name->name.name_string.len < 2)
goto out;
kret = krb5_get_forwarded_creds(context,
ac,
ccache,
KDCOptions2int(fwd_flags),
name->name.name_string.val[1],
&creds,
fwd_data);
out:
if (kret)
*flags &= ~flagmask;
else
*flags |= flagmask;
if (creds.client)
krb5_free_principal(context, creds.client);
if (creds.server)
krb5_free_principal(context, creds.server);
}
/*
* first stage of init-sec-context
*/
static OM_uint32
init_auth
(OM_uint32 * minor_status,
gsskrb5_cred cred,
gsskrb5_ctx ctx,
krb5_context context,
gss_name_t name,
const gss_OID mech_type,
OM_uint32 req_flags,
OM_uint32 time_req,
const 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 ret = GSS_S_FAILURE;
krb5_error_code kret;
krb5_data outbuf;
krb5_data fwd_data;
OM_uint32 lifetime_rec;
int allow_dns = 1;
krb5_data_zero(&outbuf);
krb5_data_zero(&fwd_data);
*minor_status = 0;
if (actual_mech_type)
*actual_mech_type = GSS_KRB5_MECHANISM;
if (cred == NULL) {
kret = krb5_cc_default (context, &ctx->ccache);
if (kret) {
*minor_status = kret;
ret = GSS_S_FAILURE;
goto failure;
}
ctx->more_flags |= CLOSE_CCACHE;
} else
ctx->ccache = cred->ccache;
kret = krb5_cc_get_principal (context, ctx->ccache, &ctx->source);
if (kret) {
*minor_status = kret;
ret = GSS_S_FAILURE;
goto failure;
}
/*
* This is hideous glue for (NFS) clients that wants to limit the
* available enctypes to what it can support (encryption in
* kernel). If there is no enctypes selected for this credential,
* reset it to the default set of enctypes.
*/
{
krb5_enctype *enctypes = NULL;
if (cred && cred->enctypes)
enctypes = cred->enctypes;
krb5_set_default_in_tkt_etypes(context, enctypes);
}
/* canon name if needed for client + target realm */
kret = krb5_cc_get_config(context, ctx->ccache, NULL,
"realm-config", &outbuf);
if (kret == 0) {
/* XXX 2 is no server canon */
if (outbuf.length < 1 || ((((unsigned char *)outbuf.data)[0]) & 2))
allow_dns = 0;
krb5_data_free(&outbuf);
}
/*
* First we try w/o dns, hope that the KDC have register alias
* (and referrals if cross realm) for this principal. If that
* fails and if we are allowed to using this realm try again with
* DNS canonicalizion.
*/
ret = gsskrb5_get_creds(minor_status, context, ctx->ccache,
ctx, name, 0, time_req,
time_rec);
if (ret && allow_dns)
ret = gsskrb5_get_creds(minor_status, context, ctx->ccache,
ctx, name, 1, time_req,
time_rec);
if (ret)
goto failure;
ctx->lifetime = ctx->kcred->times.endtime;
ret = _gss_DES3_get_mic_compat(minor_status, ctx, context);
if (ret)
goto failure;
ret = _gsskrb5_lifetime_left(minor_status,
context,
ctx->lifetime,
&lifetime_rec);
if (ret)
goto failure;
if (lifetime_rec == 0) {
*minor_status = 0;
ret = GSS_S_CONTEXT_EXPIRED;
goto failure;
}
krb5_auth_con_setkey(context,
ctx->auth_context,
&ctx->kcred->session);
kret = krb5_auth_con_generatelocalsubkey(context,
ctx->auth_context,
&ctx->kcred->session);
if(kret) {
*minor_status = kret;
ret = GSS_S_FAILURE;
goto failure;
}
return GSS_S_COMPLETE;
failure:
if (ctx->ccache && (ctx->more_flags & CLOSE_CCACHE))
krb5_cc_close(context, ctx->ccache);
ctx->ccache = NULL;
return ret;
}
static OM_uint32
init_auth_restart
(OM_uint32 * minor_status,
gsskrb5_cred cred,
gsskrb5_ctx ctx,
krb5_context context,
OM_uint32 req_flags,
const gss_channel_bindings_t input_chan_bindings,
const 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 ret = GSS_S_FAILURE;
krb5_error_code kret;
krb5_flags ap_options;
krb5_data outbuf;
uint32_t flags;
krb5_data authenticator;
Checksum cksum;
krb5_enctype enctype;
krb5_data fwd_data, timedata;
int32_t offset = 0, oldoffset = 0;
uint32_t flagmask;
krb5_data_zero(&outbuf);
krb5_data_zero(&fwd_data);
*minor_status = 0;
/*
* If the credential doesn't have ok-as-delegate, check if there
* is a realm setting and use that.
*/
if (!ctx->kcred->flags.b.ok_as_delegate) {
krb5_data data;
ret = krb5_cc_get_config(context, ctx->ccache, NULL,
"realm-config", &data);
if (ret == 0) {
/* XXX 1 is use ok-as-delegate */
if (data.length < 1 || ((((unsigned char *)data.data)[0]) & 1) == 0)
req_flags &= ~(GSS_C_DELEG_FLAG|GSS_C_DELEG_POLICY_FLAG);
krb5_data_free(&data);
}
}
flagmask = 0;
/* if we used GSS_C_DELEG_POLICY_FLAG, trust KDC */
if ((req_flags & GSS_C_DELEG_POLICY_FLAG)
&& ctx->kcred->flags.b.ok_as_delegate)
flagmask |= GSS_C_DELEG_FLAG | GSS_C_DELEG_POLICY_FLAG;
/* if there still is a GSS_C_DELEG_FLAG, use that */
if (req_flags & GSS_C_DELEG_FLAG)
flagmask |= GSS_C_DELEG_FLAG;
flags = 0;
ap_options = 0;
if (flagmask & GSS_C_DELEG_FLAG) {
do_delegation (context,
ctx->deleg_auth_context,
ctx->ccache, ctx->kcred, ctx->target,
&fwd_data, flagmask, &flags);
}
if (req_flags & GSS_C_MUTUAL_FLAG) {
flags |= GSS_C_MUTUAL_FLAG;
ap_options |= AP_OPTS_MUTUAL_REQUIRED;
}
if (req_flags & GSS_C_REPLAY_FLAG)
flags |= GSS_C_REPLAY_FLAG;
if (req_flags & GSS_C_SEQUENCE_FLAG)
flags |= GSS_C_SEQUENCE_FLAG;
#if 0
if (req_flags & GSS_C_ANON_FLAG)
; /* XXX */
#endif
if (req_flags & GSS_C_DCE_STYLE) {
/* GSS_C_DCE_STYLE implies GSS_C_MUTUAL_FLAG */
flags |= GSS_C_DCE_STYLE | GSS_C_MUTUAL_FLAG;
ap_options |= AP_OPTS_MUTUAL_REQUIRED;
}
if (req_flags & GSS_C_IDENTIFY_FLAG)
flags |= GSS_C_IDENTIFY_FLAG;
if (req_flags & GSS_C_EXTENDED_ERROR_FLAG)
flags |= GSS_C_EXTENDED_ERROR_FLAG;
if (req_flags & GSS_C_CONF_FLAG) {
flags |= GSS_C_CONF_FLAG;
}
if (req_flags & GSS_C_INTEG_FLAG) {
flags |= GSS_C_INTEG_FLAG;
}
if (cred == NULL || !(cred->cred_flags & GSS_CF_NO_CI_FLAGS)) {
flags |= GSS_C_CONF_FLAG;
flags |= GSS_C_INTEG_FLAG;
}
flags |= GSS_C_TRANS_FLAG;
if (ret_flags)
*ret_flags = flags;
ctx->flags = flags;
ctx->more_flags |= LOCAL;
ret = _gsskrb5_create_8003_checksum (minor_status,
input_chan_bindings,
flags,
&fwd_data,
&cksum);
krb5_data_free (&fwd_data);
if (ret)
goto failure;
enctype = ctx->auth_context->keyblock->keytype;
ret = krb5_cc_get_config(context, ctx->ccache, ctx->target,
"time-offset", &timedata);
if (ret == 0) {
if (timedata.length == 4) {
const u_char *p = timedata.data;
offset = (p[0] <<24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
}
krb5_data_free(&timedata);
}
if (offset) {
krb5_get_kdc_sec_offset (context, &oldoffset, NULL);
krb5_set_kdc_sec_offset (context, offset, -1);
}
kret = _krb5_build_authenticator(context,
ctx->auth_context,
enctype,
ctx->kcred,
&cksum,
&authenticator,
KRB5_KU_AP_REQ_AUTH);
if (kret) {
if (offset)
krb5_set_kdc_sec_offset (context, oldoffset, -1);
*minor_status = kret;
ret = GSS_S_FAILURE;
goto failure;
}
kret = krb5_build_ap_req (context,
enctype,
ctx->kcred,
ap_options,
authenticator,
&outbuf);
if (offset)
krb5_set_kdc_sec_offset (context, oldoffset, -1);
if (kret) {
*minor_status = kret;
ret = GSS_S_FAILURE;
goto failure;
}
if (flags & GSS_C_DCE_STYLE) {
output_token->value = outbuf.data;
output_token->length = outbuf.length;
} else {
ret = _gsskrb5_encapsulate (minor_status, &outbuf, output_token,
(u_char *)(intptr_t)"\x01\x00",
GSS_KRB5_MECHANISM);
krb5_data_free (&outbuf);
if (ret)
goto failure;
}
free_Checksum(&cksum);
if (flags & GSS_C_MUTUAL_FLAG) {
ctx->state = INITIATOR_WAIT_FOR_MUTAL;
return GSS_S_CONTINUE_NEEDED;
}
return gsskrb5_initiator_ready(minor_status, ctx, context);
failure:
if (ctx->ccache && (ctx->more_flags & CLOSE_CCACHE))
krb5_cc_close(context, ctx->ccache);
ctx->ccache = NULL;
return ret;
}
static krb5_error_code
handle_error_packet(krb5_context context,
gsskrb5_ctx ctx,
krb5_data indata)
{
krb5_error_code kret;
KRB_ERROR error;
kret = krb5_rd_error(context, &indata, &error);
if (kret == 0) {
kret = krb5_error_from_rd_error(context, &error, NULL);
/* save the time skrew for this host */
if (kret == KRB5KRB_AP_ERR_SKEW) {
krb5_data timedata;
unsigned char p[4];
int32_t t = error.stime - time(NULL);
p[0] = (t >> 24) & 0xFF;
p[1] = (t >> 16) & 0xFF;
p[2] = (t >> 8) & 0xFF;
p[3] = (t >> 0) & 0xFF;
timedata.data = p;
timedata.length = sizeof(p);
krb5_cc_set_config(context, ctx->ccache, ctx->target,
"time-offset", &timedata);
if ((ctx->more_flags & RETRIED) == 0)
ctx->state = INITIATOR_RESTART;
ctx->more_flags |= RETRIED;
}
free_KRB_ERROR (&error);
}
return kret;
}
static OM_uint32
repl_mutual
(OM_uint32 * minor_status,
gsskrb5_ctx ctx,
krb5_context context,
const gss_OID mech_type,
OM_uint32 req_flags,
OM_uint32 time_req,
const gss_channel_bindings_t input_chan_bindings,
const 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 ret;
krb5_error_code kret;
krb5_data indata;
krb5_ap_rep_enc_part *repl;
output_token->length = 0;
output_token->value = NULL;
if (actual_mech_type)
*actual_mech_type = GSS_KRB5_MECHANISM;
if (IS_DCE_STYLE(ctx)) {
/* There is no OID wrapping. */
indata.length = input_token->length;
indata.data = input_token->value;
kret = krb5_rd_rep(context,
ctx->auth_context,
&indata,
&repl);
if (kret) {
ret = _gsskrb5_decapsulate(minor_status,
input_token,
&indata,
"\x03\x00",
GSS_KRB5_MECHANISM);
if (ret == GSS_S_COMPLETE) {
*minor_status = handle_error_packet(context, ctx, indata);
} else {
*minor_status = kret;
}
return GSS_S_FAILURE;
}
} else {
ret = _gsskrb5_decapsulate (minor_status,
input_token,
&indata,
"\x02\x00",
GSS_KRB5_MECHANISM);
if (ret == GSS_S_DEFECTIVE_TOKEN) {
/* check if there is an error token sent instead */
ret = _gsskrb5_decapsulate (minor_status,
input_token,
&indata,
"\x03\x00",
GSS_KRB5_MECHANISM);
if (ret == GSS_S_COMPLETE) {
*minor_status = handle_error_packet(context, ctx, indata);
return GSS_S_FAILURE;
}
}
kret = krb5_rd_rep (context,
ctx->auth_context,
&indata,
&repl);
if (kret) {
*minor_status = kret;
return GSS_S_FAILURE;
}
}
krb5_free_ap_rep_enc_part (context,
repl);
*minor_status = 0;
if (time_rec) {
ret = _gsskrb5_lifetime_left(minor_status,
context,
ctx->lifetime,
time_rec);
} else {
ret = GSS_S_COMPLETE;
}
if (ret_flags)
*ret_flags = ctx->flags;
if (req_flags & GSS_C_DCE_STYLE) {
int32_t local_seq, remote_seq;
krb5_data outbuf;
/*
* So DCE_STYLE is strange. The client echos the seq number
* that the server used in the server's mk_rep in its own
* mk_rep(). After when done, it resets to it's own seq number
* for the gss_wrap calls.
*/
krb5_auth_con_getremoteseqnumber(context, ctx->auth_context, &remote_seq);
krb5_auth_con_getlocalseqnumber(context, ctx->auth_context, &local_seq);
krb5_auth_con_setlocalseqnumber(context, ctx->auth_context, remote_seq);
kret = krb5_mk_rep(context, ctx->auth_context, &outbuf);
if (kret) {
*minor_status = kret;
return GSS_S_FAILURE;
}
/* reset local seq number */
krb5_auth_con_setlocalseqnumber(context, ctx->auth_context, local_seq);
output_token->length = outbuf.length;
output_token->value = outbuf.data;
}
return gsskrb5_initiator_ready(minor_status, ctx, context);
}
/*
* gss_init_sec_context
*/
OM_uint32 GSSAPI_CALLCONV _gsskrb5_init_sec_context
(OM_uint32 * minor_status,
const gss_cred_id_t cred_handle,
gss_ctx_id_t * context_handle,
const gss_name_t target_name,
const gss_OID mech_type,
OM_uint32 req_flags,
OM_uint32 time_req,
const gss_channel_bindings_t input_chan_bindings,
const gss_buffer_t input_token,
gss_OID * actual_mech_type,
gss_buffer_t output_token,
OM_uint32 * ret_flags,
OM_uint32 * time_rec
)
{
krb5_context context;
gsskrb5_cred cred = (gsskrb5_cred)cred_handle;
gsskrb5_ctx ctx;
OM_uint32 ret;
GSSAPI_KRB5_INIT (&context);
output_token->length = 0;
output_token->value = NULL;
if (context_handle == NULL) {
*minor_status = 0;
return GSS_S_FAILURE | GSS_S_CALL_BAD_STRUCTURE;
}
if (ret_flags)
*ret_flags = 0;
if (time_rec)
*time_rec = 0;
if (target_name == GSS_C_NO_NAME) {
if (actual_mech_type)
*actual_mech_type = GSS_C_NO_OID;
*minor_status = 0;
return GSS_S_BAD_NAME;
}
if (mech_type != GSS_C_NO_OID &&
!gss_oid_equal(mech_type, GSS_KRB5_MECHANISM))
return GSS_S_BAD_MECH;
if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
OM_uint32 ret1;
if (*context_handle != GSS_C_NO_CONTEXT) {
*minor_status = 0;
return GSS_S_FAILURE | GSS_S_CALL_BAD_STRUCTURE;
}
ret1 = _gsskrb5_create_ctx(minor_status,
context_handle,
context,
input_chan_bindings,
INITIATOR_START);
if (ret1)
return ret1;
}
if (*context_handle == GSS_C_NO_CONTEXT) {
*minor_status = 0;
return GSS_S_FAILURE | GSS_S_CALL_BAD_STRUCTURE;
}
ctx = (gsskrb5_ctx) *context_handle;
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
again:
switch (ctx->state) {
case INITIATOR_START:
ret = init_auth(minor_status,
cred,
ctx,
context,
target_name,
mech_type,
req_flags,
time_req,
input_token,
actual_mech_type,
output_token,
ret_flags,
time_rec);
if (ret != GSS_S_COMPLETE)
break;
/* FALL THOUGH */
case INITIATOR_RESTART:
ret = init_auth_restart(minor_status,
cred,
ctx,
context,
req_flags,
input_chan_bindings,
input_token,
actual_mech_type,
output_token,
ret_flags,
time_rec);
break;
case INITIATOR_WAIT_FOR_MUTAL:
ret = repl_mutual(minor_status,
ctx,
context,
mech_type,
req_flags,
time_req,
input_chan_bindings,
input_token,
actual_mech_type,
output_token,
ret_flags,
time_rec);
if (ctx->state == INITIATOR_RESTART)
goto again;
break;
case INITIATOR_READY:
/*
* If we get there, the caller have called
* gss_init_sec_context() one time too many.
*/
_gsskrb5_set_status(EINVAL, "init_sec_context "
"called one time too many");
*minor_status = EINVAL;
ret = GSS_S_BAD_STATUS;
break;
default:
_gsskrb5_set_status(EINVAL, "init_sec_context "
"invalid state %d for client",
(int)ctx->state);
*minor_status = EINVAL;
ret = GSS_S_BAD_STATUS;
break;
}
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
/* destroy context in case of error */
if (GSS_ERROR(ret)) {
OM_uint32 min2;
_gsskrb5_delete_sec_context(&min2, context_handle, GSS_C_NO_BUFFER);
}
return ret;
}
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