| Current Path : /usr/src/crypto/heimdal/lib/gssapi/spnego/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/crypto/heimdal/lib/gssapi/spnego/accept_sec_context.c |
/*
* Copyright (c) 1997 - 2006 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* Portions Copyright (c) 2004 PADL Software Pty Ltd.
*
* 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 "spnego/spnego_locl.h"
RCSID("$Id: accept_sec_context.c 21461 2007-07-10 14:01:13Z lha $");
/* $FreeBSD: release/9.1.0/crypto/heimdal/lib/gssapi/spnego/accept_sec_context.c 178828 2008-05-07 13:53:12Z dfr $ */
static OM_uint32
send_reject (OM_uint32 *minor_status,
gss_buffer_t output_token)
{
NegotiationToken nt;
size_t size;
nt.element = choice_NegotiationToken_negTokenResp;
ALLOC(nt.u.negTokenResp.negResult, 1);
if (nt.u.negTokenResp.negResult == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
*(nt.u.negTokenResp.negResult) = reject;
nt.u.negTokenResp.supportedMech = NULL;
nt.u.negTokenResp.responseToken = NULL;
nt.u.negTokenResp.mechListMIC = NULL;
ASN1_MALLOC_ENCODE(NegotiationToken,
output_token->value, output_token->length, &nt,
&size, *minor_status);
free_NegotiationToken(&nt);
if (*minor_status != 0)
return GSS_S_FAILURE;
return GSS_S_BAD_MECH;
}
static OM_uint32
acceptor_approved(gss_name_t target_name, gss_OID mech)
{
gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
gss_OID_set oidset;
OM_uint32 junk, ret;
if (target_name == GSS_C_NO_NAME)
return GSS_S_COMPLETE;
gss_create_empty_oid_set(&junk, &oidset);
gss_add_oid_set_member(&junk, mech, &oidset);
ret = gss_acquire_cred(&junk, target_name, GSS_C_INDEFINITE, oidset,
GSS_C_ACCEPT, &cred, NULL, NULL);
gss_release_oid_set(&junk, &oidset);
if (ret != GSS_S_COMPLETE)
return ret;
gss_release_cred(&junk, &cred);
return GSS_S_COMPLETE;
}
static OM_uint32
send_supported_mechs (OM_uint32 *minor_status,
gss_buffer_t output_token)
{
NegotiationTokenWin nt;
char hostname[MAXHOSTNAMELEN + 1], *p;
gss_buffer_desc name_buf;
gss_OID name_type;
gss_name_t target_princ;
gss_name_t canon_princ;
OM_uint32 minor;
size_t buf_len;
gss_buffer_desc data;
OM_uint32 ret;
memset(&nt, 0, sizeof(nt));
nt.element = choice_NegotiationTokenWin_negTokenInit;
nt.u.negTokenInit.reqFlags = NULL;
nt.u.negTokenInit.mechToken = NULL;
nt.u.negTokenInit.negHints = NULL;
ret = _gss_spnego_indicate_mechtypelist(minor_status, GSS_C_NO_NAME,
acceptor_approved, 1, NULL,
&nt.u.negTokenInit.mechTypes, NULL);
if (ret != GSS_S_COMPLETE) {
return ret;
}
memset(&target_princ, 0, sizeof(target_princ));
if (gethostname(hostname, sizeof(hostname) - 2) != 0) {
*minor_status = errno;
free_NegotiationTokenWin(&nt);
return GSS_S_FAILURE;
}
hostname[sizeof(hostname) - 1] = '\0';
/* Send the constructed SAM name for this host */
for (p = hostname; *p != '\0' && *p != '.'; p++) {
*p = toupper((unsigned char)*p);
}
*p++ = '$';
*p = '\0';
name_buf.length = strlen(hostname);
name_buf.value = hostname;
ret = gss_import_name(minor_status, &name_buf,
GSS_C_NO_OID,
&target_princ);
if (ret != GSS_S_COMPLETE) {
free_NegotiationTokenWin(&nt);
return ret;
}
name_buf.length = 0;
name_buf.value = NULL;
/* Canonicalize the name using the preferred mechanism */
ret = gss_canonicalize_name(minor_status,
target_princ,
GSS_C_NO_OID,
&canon_princ);
if (ret != GSS_S_COMPLETE) {
free_NegotiationTokenWin(&nt);
gss_release_name(&minor, &target_princ);
return ret;
}
ret = gss_display_name(minor_status, canon_princ,
&name_buf, &name_type);
if (ret != GSS_S_COMPLETE) {
free_NegotiationTokenWin(&nt);
gss_release_name(&minor, &canon_princ);
gss_release_name(&minor, &target_princ);
return ret;
}
gss_release_name(&minor, &canon_princ);
gss_release_name(&minor, &target_princ);
ALLOC(nt.u.negTokenInit.negHints, 1);
if (nt.u.negTokenInit.negHints == NULL) {
*minor_status = ENOMEM;
gss_release_buffer(&minor, &name_buf);
free_NegotiationTokenWin(&nt);
return GSS_S_FAILURE;
}
ALLOC(nt.u.negTokenInit.negHints->hintName, 1);
if (nt.u.negTokenInit.negHints->hintName == NULL) {
*minor_status = ENOMEM;
gss_release_buffer(&minor, &name_buf);
free_NegotiationTokenWin(&nt);
return GSS_S_FAILURE;
}
*(nt.u.negTokenInit.negHints->hintName) = name_buf.value;
name_buf.value = NULL;
nt.u.negTokenInit.negHints->hintAddress = NULL;
ASN1_MALLOC_ENCODE(NegotiationTokenWin,
data.value, data.length, &nt, &buf_len, ret);
free_NegotiationTokenWin(&nt);
if (ret) {
return ret;
}
if (data.length != buf_len)
abort();
ret = gss_encapsulate_token(&data, GSS_SPNEGO_MECHANISM, output_token);
free (data.value);
if (ret != GSS_S_COMPLETE)
return ret;
*minor_status = 0;
return GSS_S_CONTINUE_NEEDED;
}
static OM_uint32
send_accept (OM_uint32 *minor_status,
gssspnego_ctx context_handle,
gss_buffer_t mech_token,
int initial_response,
gss_buffer_t mech_buf,
gss_buffer_t output_token)
{
NegotiationToken nt;
OM_uint32 ret;
gss_buffer_desc mech_mic_buf;
size_t size;
memset(&nt, 0, sizeof(nt));
nt.element = choice_NegotiationToken_negTokenResp;
ALLOC(nt.u.negTokenResp.negResult, 1);
if (nt.u.negTokenResp.negResult == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
if (context_handle->open) {
if (mech_token != GSS_C_NO_BUFFER
&& mech_token->length != 0
&& mech_buf != GSS_C_NO_BUFFER)
*(nt.u.negTokenResp.negResult) = accept_incomplete;
else
*(nt.u.negTokenResp.negResult) = accept_completed;
} else {
if (initial_response && context_handle->require_mic)
*(nt.u.negTokenResp.negResult) = request_mic;
else
*(nt.u.negTokenResp.negResult) = accept_incomplete;
}
if (initial_response) {
ALLOC(nt.u.negTokenResp.supportedMech, 1);
if (nt.u.negTokenResp.supportedMech == NULL) {
free_NegotiationToken(&nt);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
ret = der_get_oid(context_handle->preferred_mech_type->elements,
context_handle->preferred_mech_type->length,
nt.u.negTokenResp.supportedMech,
NULL);
if (ret) {
free_NegotiationToken(&nt);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
} else {
nt.u.negTokenResp.supportedMech = NULL;
}
if (mech_token != GSS_C_NO_BUFFER && mech_token->length != 0) {
ALLOC(nt.u.negTokenResp.responseToken, 1);
if (nt.u.negTokenResp.responseToken == NULL) {
free_NegotiationToken(&nt);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
nt.u.negTokenResp.responseToken->length = mech_token->length;
nt.u.negTokenResp.responseToken->data = mech_token->value;
mech_token->length = 0;
mech_token->value = NULL;
} else {
nt.u.negTokenResp.responseToken = NULL;
}
if (mech_buf != GSS_C_NO_BUFFER) {
ret = gss_get_mic(minor_status,
context_handle->negotiated_ctx_id,
0,
mech_buf,
&mech_mic_buf);
if (ret == GSS_S_COMPLETE) {
ALLOC(nt.u.negTokenResp.mechListMIC, 1);
if (nt.u.negTokenResp.mechListMIC == NULL) {
gss_release_buffer(minor_status, &mech_mic_buf);
free_NegotiationToken(&nt);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
nt.u.negTokenResp.mechListMIC->length = mech_mic_buf.length;
nt.u.negTokenResp.mechListMIC->data = mech_mic_buf.value;
} else if (ret == GSS_S_UNAVAILABLE) {
nt.u.negTokenResp.mechListMIC = NULL;
} else {
free_NegotiationToken(&nt);
return ret;
}
} else
nt.u.negTokenResp.mechListMIC = NULL;
ASN1_MALLOC_ENCODE(NegotiationToken,
output_token->value, output_token->length,
&nt, &size, ret);
if (ret) {
free_NegotiationToken(&nt);
*minor_status = ret;
return GSS_S_FAILURE;
}
/*
* The response should not be encapsulated, because
* it is a SubsequentContextToken (note though RFC 1964
* specifies encapsulation for all _Kerberos_ tokens).
*/
if (*(nt.u.negTokenResp.negResult) == accept_completed)
ret = GSS_S_COMPLETE;
else
ret = GSS_S_CONTINUE_NEEDED;
free_NegotiationToken(&nt);
return ret;
}
static OM_uint32
verify_mechlist_mic
(OM_uint32 *minor_status,
gssspnego_ctx context_handle,
gss_buffer_t mech_buf,
heim_octet_string *mechListMIC
)
{
OM_uint32 ret;
gss_buffer_desc mic_buf;
if (context_handle->verified_mic) {
/* This doesn't make sense, we've already verified it? */
*minor_status = 0;
return GSS_S_DUPLICATE_TOKEN;
}
if (mechListMIC == NULL) {
*minor_status = 0;
return GSS_S_DEFECTIVE_TOKEN;
}
mic_buf.length = mechListMIC->length;
mic_buf.value = mechListMIC->data;
ret = gss_verify_mic(minor_status,
context_handle->negotiated_ctx_id,
mech_buf,
&mic_buf,
NULL);
if (ret != GSS_S_COMPLETE)
ret = GSS_S_DEFECTIVE_TOKEN;
return ret;
}
static OM_uint32
select_mech(OM_uint32 *minor_status, MechType *mechType, int verify_p,
gss_OID *mech_p)
{
char mechbuf[64];
size_t mech_len;
gss_OID_desc oid;
gss_OID oidp;
gss_OID_set mechs;
int i;
OM_uint32 ret, junk;
ret = der_put_oid ((unsigned char *)mechbuf + sizeof(mechbuf) - 1,
sizeof(mechbuf),
mechType,
&mech_len);
if (ret) {
return GSS_S_DEFECTIVE_TOKEN;
}
oid.length = mech_len;
oid.elements = mechbuf + sizeof(mechbuf) - mech_len;
if (gss_oid_equal(&oid, GSS_SPNEGO_MECHANISM)) {
return GSS_S_BAD_MECH;
}
*minor_status = 0;
/* Translate broken MS Kebreros OID */
if (gss_oid_equal(&oid, &_gss_spnego_mskrb_mechanism_oid_desc))
oidp = &_gss_spnego_krb5_mechanism_oid_desc;
else
oidp = &oid;
ret = gss_indicate_mechs(&junk, &mechs);
if (ret)
return (ret);
for (i = 0; i < mechs->count; i++)
if (gss_oid_equal(&mechs->elements[i], oidp))
break;
if (i == mechs->count) {
gss_release_oid_set(&junk, &mechs);
return GSS_S_BAD_MECH;
}
gss_release_oid_set(&junk, &mechs);
ret = gss_duplicate_oid(minor_status,
&oid, /* possibly this should be oidp */
mech_p);
if (verify_p) {
gss_name_t name = GSS_C_NO_NAME;
gss_buffer_desc namebuf;
char *str = NULL, *host, hostname[MAXHOSTNAMELEN];
host = getenv("GSSAPI_SPNEGO_NAME");
if (host == NULL || issuid()) {
if (gethostname(hostname, sizeof(hostname)) != 0) {
*minor_status = errno;
return GSS_S_FAILURE;
}
asprintf(&str, "host@%s", hostname);
host = str;
}
namebuf.length = strlen(host);
namebuf.value = host;
ret = gss_import_name(minor_status, &namebuf,
GSS_C_NT_HOSTBASED_SERVICE, &name);
if (str)
free(str);
if (ret != GSS_S_COMPLETE)
return ret;
ret = acceptor_approved(name, *mech_p);
gss_release_name(&junk, &name);
}
return ret;
}
static OM_uint32
acceptor_complete(OM_uint32 * minor_status,
gssspnego_ctx ctx,
int *get_mic,
gss_buffer_t mech_buf,
gss_buffer_t mech_input_token,
gss_buffer_t mech_output_token,
heim_octet_string *mic,
gss_buffer_t output_token)
{
OM_uint32 ret;
int require_mic, verify_mic;
gss_buffer_desc buf;
buf.length = 0;
buf.value = NULL;
ret = _gss_spnego_require_mechlist_mic(minor_status, ctx, &require_mic);
if (ret)
return ret;
ctx->require_mic = require_mic;
if (mic != NULL)
require_mic = 1;
if (ctx->open && require_mic) {
if (mech_input_token == GSS_C_NO_BUFFER) { /* Even/One */
verify_mic = 1;
*get_mic = 0;
} else if (mech_output_token != GSS_C_NO_BUFFER &&
mech_output_token->length == 0) { /* Odd */
*get_mic = verify_mic = 1;
} else { /* Even/One */
verify_mic = 0;
*get_mic = 1;
}
if (verify_mic || get_mic) {
int eret;
size_t buf_len;
ASN1_MALLOC_ENCODE(MechTypeList,
mech_buf->value, mech_buf->length,
&ctx->initiator_mech_types, &buf_len, eret);
if (eret) {
*minor_status = eret;
return GSS_S_FAILURE;
}
if (buf.length != buf_len)
abort();
}
if (verify_mic) {
ret = verify_mechlist_mic(minor_status, ctx, mech_buf, mic);
if (ret) {
if (get_mic)
send_reject (minor_status, output_token);
if (buf.value)
free(buf.value);
return ret;
}
ctx->verified_mic = 1;
}
if (buf.value)
free(buf.value);
} else
*get_mic = verify_mic = 0;
return GSS_S_COMPLETE;
}
static OM_uint32
acceptor_start
(OM_uint32 * minor_status,
gss_ctx_id_t * context_handle,
const gss_cred_id_t acceptor_cred_handle,
const gss_buffer_t input_token_buffer,
const 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 ret, junk, minor;
NegotiationToken nt;
size_t nt_len;
NegTokenInit *ni;
int i;
gss_buffer_desc data;
gss_buffer_t mech_input_token = GSS_C_NO_BUFFER;
gss_buffer_desc mech_output_token;
gss_buffer_desc mech_buf;
gss_OID preferred_mech_type = GSS_C_NO_OID;
gssspnego_ctx ctx;
gssspnego_cred acceptor_cred = (gssspnego_cred)acceptor_cred_handle;
int get_mic = 0;
int first_ok = 0;
mech_output_token.value = NULL;
mech_output_token.length = 0;
mech_buf.value = NULL;
if (input_token_buffer->length == 0)
return send_supported_mechs (minor_status, output_token);
ret = _gss_spnego_alloc_sec_context(minor_status, context_handle);
if (ret != GSS_S_COMPLETE)
return ret;
ctx = (gssspnego_ctx)*context_handle;
/*
* The GSS-API encapsulation is only present on the initial
* context token (negTokenInit).
*/
ret = gss_decapsulate_token (input_token_buffer,
GSS_SPNEGO_MECHANISM,
&data);
if (ret)
return ret;
ret = decode_NegotiationToken(data.value, data.length, &nt, &nt_len);
gss_release_buffer(minor_status, &data);
if (ret) {
*minor_status = ret;
return GSS_S_DEFECTIVE_TOKEN;
}
if (nt.element != choice_NegotiationToken_negTokenInit) {
*minor_status = 0;
return GSS_S_DEFECTIVE_TOKEN;
}
ni = &nt.u.negTokenInit;
if (ni->mechTypes.len < 1) {
free_NegotiationToken(&nt);
*minor_status = 0;
return GSS_S_DEFECTIVE_TOKEN;
}
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
ret = copy_MechTypeList(&ni->mechTypes, &ctx->initiator_mech_types);
if (ret) {
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
free_NegotiationToken(&nt);
*minor_status = ret;
return GSS_S_FAILURE;
}
/*
* First we try the opportunistic token if we have support for it,
* don't try to verify we have credential for the token,
* gss_accept_sec_context will (hopefully) tell us that.
* If that failes,
*/
ret = select_mech(minor_status,
&ni->mechTypes.val[0],
0,
&preferred_mech_type);
if (ret == 0 && ni->mechToken != NULL) {
gss_cred_id_t mech_delegated_cred = GSS_C_NO_CREDENTIAL;
gss_cred_id_t mech_cred;
gss_buffer_desc ibuf;
ibuf.length = ni->mechToken->length;
ibuf.value = ni->mechToken->data;
mech_input_token = &ibuf;
if (acceptor_cred != NULL)
mech_cred = acceptor_cred->negotiated_cred_id;
else
mech_cred = GSS_C_NO_CREDENTIAL;
if (ctx->mech_src_name != GSS_C_NO_NAME)
gss_release_name(&minor, &ctx->mech_src_name);
if (ctx->delegated_cred_id != GSS_C_NO_CREDENTIAL)
_gss_spnego_release_cred(&minor, &ctx->delegated_cred_id);
ret = gss_accept_sec_context(&minor,
&ctx->negotiated_ctx_id,
mech_cred,
mech_input_token,
input_chan_bindings,
&ctx->mech_src_name,
&ctx->negotiated_mech_type,
&mech_output_token,
&ctx->mech_flags,
&ctx->mech_time_rec,
&mech_delegated_cred);
if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED) {
ctx->preferred_mech_type = preferred_mech_type;
ctx->negotiated_mech_type = preferred_mech_type;
if (ret == GSS_S_COMPLETE)
ctx->open = 1;
if (mech_delegated_cred && delegated_cred_handle)
ret = _gss_spnego_alloc_cred(minor_status,
mech_delegated_cred,
delegated_cred_handle);
else
gss_release_cred(&junk, &mech_delegated_cred);
ret = acceptor_complete(minor_status,
ctx,
&get_mic,
&mech_buf,
mech_input_token,
&mech_output_token,
ni->mechListMIC,
output_token);
if (ret != GSS_S_COMPLETE)
goto out;
first_ok = 1;
}
}
/*
* If opportunistic token failed, lets try the other mechs.
*/
if (!first_ok) {
/* Call glue layer to find first mech we support */
for (i = 1; i < ni->mechTypes.len; ++i) {
ret = select_mech(minor_status,
&ni->mechTypes.val[i],
1,
&preferred_mech_type);
if (ret == 0)
break;
}
if (preferred_mech_type == GSS_C_NO_OID) {
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
free_NegotiationToken(&nt);
return GSS_S_BAD_MECH;
}
ctx->preferred_mech_type = preferred_mech_type;
ctx->negotiated_mech_type = preferred_mech_type;
}
/*
* The initial token always have a response
*/
ret = send_accept (minor_status,
ctx,
&mech_output_token,
1,
get_mic ? &mech_buf : NULL,
output_token);
if (ret)
goto out;
out:
if (mech_output_token.value != NULL)
gss_release_buffer(&minor, &mech_output_token);
if (mech_buf.value != NULL) {
free(mech_buf.value);
mech_buf.value = NULL;
}
free_NegotiationToken(&nt);
if (ret == GSS_S_COMPLETE) {
if (src_name != NULL && ctx->mech_src_name != NULL) {
spnego_name name;
name = calloc(1, sizeof(*name));
if (name) {
name->mech = ctx->mech_src_name;
ctx->mech_src_name = NULL;
*src_name = (gss_name_t)name;
}
}
if (delegated_cred_handle != NULL) {
*delegated_cred_handle = ctx->delegated_cred_id;
ctx->delegated_cred_id = GSS_C_NO_CREDENTIAL;
}
}
if (mech_type != NULL)
*mech_type = ctx->negotiated_mech_type;
if (ret_flags != NULL)
*ret_flags = ctx->mech_flags;
if (time_rec != NULL)
*time_rec = ctx->mech_time_rec;
if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED) {
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
return ret;
}
_gss_spnego_internal_delete_sec_context(&minor, context_handle,
GSS_C_NO_BUFFER);
return ret;
}
static OM_uint32
acceptor_continue
(OM_uint32 * minor_status,
gss_ctx_id_t * context_handle,
const gss_cred_id_t acceptor_cred_handle,
const gss_buffer_t input_token_buffer,
const 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 ret, ret2, minor;
NegotiationToken nt;
size_t nt_len;
NegTokenResp *na;
unsigned int negResult = accept_incomplete;
gss_buffer_t mech_input_token = GSS_C_NO_BUFFER;
gss_buffer_t mech_output_token = GSS_C_NO_BUFFER;
gss_buffer_desc mech_buf;
gssspnego_ctx ctx;
gssspnego_cred acceptor_cred = (gssspnego_cred)acceptor_cred_handle;
mech_buf.value = NULL;
ctx = (gssspnego_ctx)*context_handle;
/*
* The GSS-API encapsulation is only present on the initial
* context token (negTokenInit).
*/
ret = decode_NegotiationToken(input_token_buffer->value,
input_token_buffer->length,
&nt, &nt_len);
if (ret) {
*minor_status = ret;
return GSS_S_DEFECTIVE_TOKEN;
}
if (nt.element != choice_NegotiationToken_negTokenResp) {
*minor_status = 0;
return GSS_S_DEFECTIVE_TOKEN;
}
na = &nt.u.negTokenResp;
if (na->negResult != NULL) {
negResult = *(na->negResult);
}
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
{
gss_buffer_desc ibuf, obuf;
int require_mic, get_mic = 0;
int require_response;
heim_octet_string *mic;
if (na->responseToken != NULL) {
ibuf.length = na->responseToken->length;
ibuf.value = na->responseToken->data;
mech_input_token = &ibuf;
} else {
ibuf.value = NULL;
ibuf.length = 0;
}
if (mech_input_token != GSS_C_NO_BUFFER) {
gss_cred_id_t mech_cred;
gss_cred_id_t mech_delegated_cred;
gss_cred_id_t *mech_delegated_cred_p;
if (acceptor_cred != NULL)
mech_cred = acceptor_cred->negotiated_cred_id;
else
mech_cred = GSS_C_NO_CREDENTIAL;
if (delegated_cred_handle != NULL) {
mech_delegated_cred = GSS_C_NO_CREDENTIAL;
mech_delegated_cred_p = &mech_delegated_cred;
} else {
mech_delegated_cred_p = NULL;
}
if (ctx->mech_src_name != GSS_C_NO_NAME)
gss_release_name(&minor, &ctx->mech_src_name);
if (ctx->delegated_cred_id != GSS_C_NO_CREDENTIAL)
_gss_spnego_release_cred(&minor, &ctx->delegated_cred_id);
ret = gss_accept_sec_context(&minor,
&ctx->negotiated_ctx_id,
mech_cred,
mech_input_token,
input_chan_bindings,
&ctx->mech_src_name,
&ctx->negotiated_mech_type,
&obuf,
&ctx->mech_flags,
&ctx->mech_time_rec,
mech_delegated_cred_p);
if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED) {
if (mech_delegated_cred_p != NULL &&
mech_delegated_cred != GSS_C_NO_CREDENTIAL) {
ret2 = _gss_spnego_alloc_cred(minor_status,
mech_delegated_cred,
&ctx->delegated_cred_id);
if (ret2 != GSS_S_COMPLETE)
ret = ret2;
}
mech_output_token = &obuf;
}
if (ret != GSS_S_COMPLETE && ret != GSS_S_CONTINUE_NEEDED) {
free_NegotiationToken(&nt);
send_reject (minor_status, output_token);
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
return ret;
}
if (ret == GSS_S_COMPLETE)
ctx->open = 1;
} else
ret = GSS_S_COMPLETE;
ret2 = _gss_spnego_require_mechlist_mic(minor_status,
ctx,
&require_mic);
if (ret2)
goto out;
ctx->require_mic = require_mic;
mic = na->mechListMIC;
if (mic != NULL)
require_mic = 1;
if (ret == GSS_S_COMPLETE)
ret = acceptor_complete(minor_status,
ctx,
&get_mic,
&mech_buf,
mech_input_token,
mech_output_token,
na->mechListMIC,
output_token);
if (ctx->mech_flags & GSS_C_DCE_STYLE)
require_response = (negResult != accept_completed);
else
require_response = 0;
/*
* Check whether we need to send a result: there should be only
* one accept_completed response sent in the entire negotiation
*/
if ((mech_output_token != GSS_C_NO_BUFFER &&
mech_output_token->length != 0)
|| (ctx->open && negResult == accept_incomplete)
|| require_response
|| get_mic) {
ret2 = send_accept (minor_status,
ctx,
mech_output_token,
0,
get_mic ? &mech_buf : NULL,
output_token);
if (ret2)
goto out;
}
out:
if (ret2 != GSS_S_COMPLETE)
ret = ret2;
if (mech_output_token != NULL)
gss_release_buffer(&minor, mech_output_token);
if (mech_buf.value != NULL)
free(mech_buf.value);
free_NegotiationToken(&nt);
}
if (ret == GSS_S_COMPLETE) {
if (src_name != NULL && ctx->mech_src_name != NULL) {
spnego_name name;
name = calloc(1, sizeof(*name));
if (name) {
name->mech = ctx->mech_src_name;
ctx->mech_src_name = NULL;
*src_name = (gss_name_t)name;
}
}
if (delegated_cred_handle != NULL) {
*delegated_cred_handle = ctx->delegated_cred_id;
ctx->delegated_cred_id = GSS_C_NO_CREDENTIAL;
}
}
if (mech_type != NULL)
*mech_type = ctx->negotiated_mech_type;
if (ret_flags != NULL)
*ret_flags = ctx->mech_flags;
if (time_rec != NULL)
*time_rec = ctx->mech_time_rec;
if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED) {
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
return ret;
}
_gss_spnego_internal_delete_sec_context(&minor, context_handle,
GSS_C_NO_BUFFER);
return ret;
}
OM_uint32
_gss_spnego_accept_sec_context
(OM_uint32 * minor_status,
gss_ctx_id_t * context_handle,
const gss_cred_id_t acceptor_cred_handle,
const gss_buffer_t input_token_buffer,
const 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
)
{
_gss_accept_sec_context_t *func;
*minor_status = 0;
output_token->length = 0;
output_token->value = NULL;
if (src_name != NULL)
*src_name = GSS_C_NO_NAME;
if (mech_type != NULL)
*mech_type = GSS_C_NO_OID;
if (ret_flags != NULL)
*ret_flags = 0;
if (time_rec != NULL)
*time_rec = 0;
if (delegated_cred_handle != NULL)
*delegated_cred_handle = GSS_C_NO_CREDENTIAL;
if (*context_handle == GSS_C_NO_CONTEXT)
func = acceptor_start;
else
func = acceptor_continue;
return (*func)(minor_status, context_handle, acceptor_cred_handle,
input_token_buffer, input_chan_bindings,
src_name, mech_type, output_token, ret_flags,
time_rec, delegated_cred_handle);
}