446 lines
12 KiB
C
446 lines
12 KiB
C
/*
|
|
* Copyright (c) 1997 - 2003 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 "gssapi_locl.h"
|
|
|
|
RCSID("$Id: accept_sec_context.c,v 1.33.2.2 2003/12/19 00:37:06 lha Exp $");
|
|
|
|
krb5_keytab gssapi_krb5_keytab;
|
|
|
|
OM_uint32
|
|
gsskrb5_register_acceptor_identity (const char *identity)
|
|
{
|
|
krb5_error_code ret;
|
|
char *p;
|
|
|
|
ret = gssapi_krb5_init();
|
|
if(ret)
|
|
return GSS_S_FAILURE;
|
|
|
|
if(gssapi_krb5_keytab != NULL) {
|
|
krb5_kt_close(gssapi_krb5_context, gssapi_krb5_keytab);
|
|
gssapi_krb5_keytab = NULL;
|
|
}
|
|
asprintf(&p, "FILE:%s", identity);
|
|
if(p == NULL)
|
|
return GSS_S_FAILURE;
|
|
ret = krb5_kt_resolve(gssapi_krb5_context, p, &gssapi_krb5_keytab);
|
|
free(p);
|
|
if(ret)
|
|
return GSS_S_FAILURE;
|
|
return GSS_S_COMPLETE;
|
|
}
|
|
|
|
OM_uint32
|
|
gss_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
|
|
)
|
|
{
|
|
krb5_error_code kret;
|
|
OM_uint32 ret = GSS_S_COMPLETE;
|
|
krb5_data indata;
|
|
krb5_flags ap_options;
|
|
OM_uint32 flags;
|
|
krb5_ticket *ticket = NULL;
|
|
krb5_keytab keytab = NULL;
|
|
krb5_data fwd_data;
|
|
OM_uint32 minor;
|
|
|
|
GSSAPI_KRB5_INIT();
|
|
|
|
krb5_data_zero (&fwd_data);
|
|
output_token->length = 0;
|
|
output_token->value = NULL;
|
|
|
|
if (src_name != NULL)
|
|
*src_name = NULL;
|
|
if (mech_type)
|
|
*mech_type = GSS_KRB5_MECHANISM;
|
|
|
|
if (*context_handle == GSS_C_NO_CONTEXT) {
|
|
*context_handle = malloc(sizeof(**context_handle));
|
|
if (*context_handle == GSS_C_NO_CONTEXT) {
|
|
*minor_status = ENOMEM;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
}
|
|
|
|
(*context_handle)->auth_context = NULL;
|
|
(*context_handle)->source = NULL;
|
|
(*context_handle)->target = NULL;
|
|
(*context_handle)->flags = 0;
|
|
(*context_handle)->more_flags = 0;
|
|
(*context_handle)->ticket = NULL;
|
|
(*context_handle)->lifetime = GSS_C_INDEFINITE;
|
|
|
|
kret = krb5_auth_con_init (gssapi_krb5_context,
|
|
&(*context_handle)->auth_context);
|
|
if (kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
|
|
if (input_chan_bindings != GSS_C_NO_CHANNEL_BINDINGS
|
|
&& input_chan_bindings->application_data.length ==
|
|
2 * sizeof((*context_handle)->auth_context->local_port)
|
|
) {
|
|
|
|
/* Port numbers are expected to be in application_data.value,
|
|
* initator's port first */
|
|
|
|
krb5_address initiator_addr, acceptor_addr;
|
|
|
|
memset(&initiator_addr, 0, sizeof(initiator_addr));
|
|
memset(&acceptor_addr, 0, sizeof(acceptor_addr));
|
|
|
|
(*context_handle)->auth_context->remote_port =
|
|
*(int16_t *) input_chan_bindings->application_data.value;
|
|
|
|
(*context_handle)->auth_context->local_port =
|
|
*((int16_t *) input_chan_bindings->application_data.value + 1);
|
|
|
|
|
|
kret = gss_address_to_krb5addr(input_chan_bindings->acceptor_addrtype,
|
|
&input_chan_bindings->acceptor_address,
|
|
(*context_handle)->auth_context->local_port,
|
|
&acceptor_addr);
|
|
if (kret) {
|
|
gssapi_krb5_set_error_string ();
|
|
ret = GSS_S_BAD_BINDINGS;
|
|
*minor_status = kret;
|
|
goto failure;
|
|
}
|
|
|
|
kret = gss_address_to_krb5addr(input_chan_bindings->initiator_addrtype,
|
|
&input_chan_bindings->initiator_address,
|
|
(*context_handle)->auth_context->remote_port,
|
|
&initiator_addr);
|
|
if (kret) {
|
|
krb5_free_address (gssapi_krb5_context, &acceptor_addr);
|
|
gssapi_krb5_set_error_string ();
|
|
ret = GSS_S_BAD_BINDINGS;
|
|
*minor_status = kret;
|
|
goto failure;
|
|
}
|
|
|
|
kret = krb5_auth_con_setaddrs(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
&acceptor_addr, /* local address */
|
|
&initiator_addr); /* remote address */
|
|
|
|
krb5_free_address (gssapi_krb5_context, &initiator_addr);
|
|
krb5_free_address (gssapi_krb5_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
|
|
|
|
if (kret) {
|
|
gssapi_krb5_set_error_string ();
|
|
ret = GSS_S_BAD_BINDINGS;
|
|
*minor_status = kret;
|
|
goto failure;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
{
|
|
int32_t tmp;
|
|
|
|
krb5_auth_con_getflags(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
&tmp);
|
|
tmp |= KRB5_AUTH_CONTEXT_DO_SEQUENCE;
|
|
krb5_auth_con_setflags(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
tmp);
|
|
}
|
|
|
|
ret = gssapi_krb5_decapsulate (minor_status,
|
|
input_token_buffer,
|
|
&indata,
|
|
"\x01\x00");
|
|
if (ret)
|
|
goto failure;
|
|
|
|
if (acceptor_cred_handle == GSS_C_NO_CREDENTIAL) {
|
|
if (gssapi_krb5_keytab != NULL) {
|
|
keytab = gssapi_krb5_keytab;
|
|
}
|
|
} else if (acceptor_cred_handle->keytab != NULL) {
|
|
keytab = acceptor_cred_handle->keytab;
|
|
}
|
|
|
|
kret = krb5_rd_req (gssapi_krb5_context,
|
|
&(*context_handle)->auth_context,
|
|
&indata,
|
|
(acceptor_cred_handle == GSS_C_NO_CREDENTIAL) ? NULL
|
|
: acceptor_cred_handle->principal,
|
|
keytab,
|
|
&ap_options,
|
|
&ticket);
|
|
if (kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
|
|
kret = krb5_copy_principal (gssapi_krb5_context,
|
|
ticket->client,
|
|
&(*context_handle)->source);
|
|
if (kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
|
|
kret = krb5_copy_principal (gssapi_krb5_context,
|
|
ticket->server,
|
|
&(*context_handle)->target);
|
|
if (kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
|
|
ret = _gss_DES3_get_mic_compat(minor_status, *context_handle);
|
|
if (ret)
|
|
goto failure;
|
|
|
|
if (src_name != NULL) {
|
|
kret = krb5_copy_principal (gssapi_krb5_context,
|
|
ticket->client,
|
|
src_name);
|
|
if (kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
}
|
|
|
|
{
|
|
krb5_authenticator authenticator;
|
|
|
|
kret = krb5_auth_con_getauthenticator(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
&authenticator);
|
|
if(kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
|
|
ret = gssapi_krb5_verify_8003_checksum(minor_status,
|
|
input_chan_bindings,
|
|
authenticator->cksum,
|
|
&flags,
|
|
&fwd_data);
|
|
krb5_free_authenticator(gssapi_krb5_context, &authenticator);
|
|
if (ret)
|
|
goto failure;
|
|
}
|
|
|
|
if (fwd_data.length > 0 && (flags & GSS_C_DELEG_FLAG)) {
|
|
krb5_ccache ccache;
|
|
int32_t ac_flags;
|
|
|
|
if (delegated_cred_handle == NULL)
|
|
/* XXX Create a new delegated_cred_handle? */
|
|
kret = krb5_cc_default (gssapi_krb5_context, &ccache);
|
|
else if (*delegated_cred_handle == NULL) {
|
|
if ((*delegated_cred_handle =
|
|
calloc(1, sizeof(**delegated_cred_handle))) == NULL) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = ENOMEM;
|
|
krb5_set_error_string(gssapi_krb5_context, "out of memory");
|
|
gssapi_krb5_set_error_string();
|
|
goto failure;
|
|
}
|
|
if ((ret = gss_duplicate_name(minor_status, ticket->client,
|
|
&(*delegated_cred_handle)->principal)) != 0) {
|
|
flags &= ~GSS_C_DELEG_FLAG;
|
|
free(*delegated_cred_handle);
|
|
*delegated_cred_handle = NULL;
|
|
goto end_fwd;
|
|
}
|
|
}
|
|
if (delegated_cred_handle != NULL &&
|
|
(*delegated_cred_handle)->ccache == NULL) {
|
|
kret = krb5_cc_gen_new (gssapi_krb5_context,
|
|
&krb5_mcc_ops,
|
|
&(*delegated_cred_handle)->ccache);
|
|
ccache = (*delegated_cred_handle)->ccache;
|
|
}
|
|
if (delegated_cred_handle != NULL &&
|
|
(*delegated_cred_handle)->mechanisms == NULL) {
|
|
ret = gss_create_empty_oid_set(minor_status,
|
|
&(*delegated_cred_handle)->mechanisms);
|
|
if (ret)
|
|
goto failure;
|
|
ret = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
|
|
&(*delegated_cred_handle)->mechanisms);
|
|
if (ret)
|
|
goto failure;
|
|
}
|
|
|
|
if (kret) {
|
|
flags &= ~GSS_C_DELEG_FLAG;
|
|
goto end_fwd;
|
|
}
|
|
|
|
kret = krb5_cc_initialize(gssapi_krb5_context,
|
|
ccache,
|
|
*src_name);
|
|
if (kret) {
|
|
flags &= ~GSS_C_DELEG_FLAG;
|
|
goto end_fwd;
|
|
}
|
|
|
|
krb5_auth_con_getflags(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
&ac_flags);
|
|
krb5_auth_con_setflags(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
ac_flags & ~KRB5_AUTH_CONTEXT_DO_TIME);
|
|
kret = krb5_rd_cred2(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
ccache,
|
|
&fwd_data);
|
|
krb5_auth_con_setflags(gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
ac_flags);
|
|
if (kret) {
|
|
flags &= ~GSS_C_DELEG_FLAG;
|
|
goto end_fwd;
|
|
}
|
|
|
|
end_fwd:
|
|
free(fwd_data.data);
|
|
}
|
|
|
|
|
|
flags |= GSS_C_TRANS_FLAG;
|
|
|
|
if (ret_flags)
|
|
*ret_flags = flags;
|
|
(*context_handle)->lifetime = ticket->ticket.endtime;
|
|
(*context_handle)->flags = flags;
|
|
(*context_handle)->more_flags |= OPEN;
|
|
|
|
if (mech_type)
|
|
*mech_type = GSS_KRB5_MECHANISM;
|
|
|
|
if (time_rec) {
|
|
ret = gssapi_lifetime_left(minor_status,
|
|
(*context_handle)->lifetime,
|
|
time_rec);
|
|
if (ret)
|
|
goto failure;
|
|
}
|
|
|
|
if(flags & GSS_C_MUTUAL_FLAG) {
|
|
krb5_data outbuf;
|
|
|
|
kret = krb5_mk_rep (gssapi_krb5_context,
|
|
(*context_handle)->auth_context,
|
|
&outbuf);
|
|
if (kret) {
|
|
ret = GSS_S_FAILURE;
|
|
*minor_status = kret;
|
|
gssapi_krb5_set_error_string ();
|
|
goto failure;
|
|
}
|
|
ret = gssapi_krb5_encapsulate (minor_status,
|
|
&outbuf,
|
|
output_token,
|
|
"\x02\x00");
|
|
krb5_data_free (&outbuf);
|
|
if (ret)
|
|
goto failure;
|
|
} else {
|
|
output_token->length = 0;
|
|
output_token->value = NULL;
|
|
}
|
|
|
|
(*context_handle)->ticket = ticket;
|
|
ticket = NULL;
|
|
|
|
#if 0
|
|
krb5_free_ticket (context, ticket);
|
|
#endif
|
|
|
|
*minor_status = 0;
|
|
return GSS_S_COMPLETE;
|
|
|
|
failure:
|
|
if (fwd_data.length > 0)
|
|
free(fwd_data.data);
|
|
if (ticket != NULL)
|
|
krb5_free_ticket (gssapi_krb5_context, ticket);
|
|
krb5_auth_con_free (gssapi_krb5_context,
|
|
(*context_handle)->auth_context);
|
|
if((*context_handle)->source)
|
|
krb5_free_principal (gssapi_krb5_context,
|
|
(*context_handle)->source);
|
|
if((*context_handle)->target)
|
|
krb5_free_principal (gssapi_krb5_context,
|
|
(*context_handle)->target);
|
|
free (*context_handle);
|
|
if (src_name != NULL) {
|
|
gss_release_name (&minor, src_name);
|
|
*src_name = NULL;
|
|
}
|
|
*context_handle = GSS_C_NO_CONTEXT;
|
|
return ret;
|
|
}
|