258 lines
6.9 KiB
C
258 lines
6.9 KiB
C
/*
|
|
* Copyright (c) 2006 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 "ntlm/ntlm.h"
|
|
|
|
RCSID("$Id: accept_sec_context.c 22521 2008-01-24 11:53:18Z lha $");
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
OM_uint32
|
|
_gss_ntlm_allocate_ctx(OM_uint32 *minor_status, ntlm_ctx *ctx)
|
|
{
|
|
OM_uint32 maj_stat;
|
|
|
|
*ctx = calloc(1, sizeof(**ctx));
|
|
|
|
(*ctx)->server = &ntlmsspi_kdc_digest;
|
|
|
|
maj_stat = (*(*ctx)->server->nsi_init)(minor_status, &(*ctx)->ictx);
|
|
if (maj_stat != GSS_S_COMPLETE)
|
|
return maj_stat;
|
|
|
|
return GSS_S_COMPLETE;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
OM_uint32
|
|
_gss_ntlm_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 ret;
|
|
struct ntlm_buf data;
|
|
ntlm_ctx ctx;
|
|
|
|
output_token->value = NULL;
|
|
output_token->length = 0;
|
|
|
|
*minor_status = 0;
|
|
|
|
if (context_handle == NULL)
|
|
return GSS_S_FAILURE;
|
|
|
|
if (input_token_buffer == GSS_C_NO_BUFFER)
|
|
return GSS_S_FAILURE;
|
|
|
|
if (src_name)
|
|
*src_name = GSS_C_NO_NAME;
|
|
if (mech_type)
|
|
*mech_type = GSS_C_NO_OID;
|
|
if (ret_flags)
|
|
*ret_flags = 0;
|
|
if (time_rec)
|
|
*time_rec = 0;
|
|
if (delegated_cred_handle)
|
|
*delegated_cred_handle = GSS_C_NO_CREDENTIAL;
|
|
|
|
if (*context_handle == GSS_C_NO_CONTEXT) {
|
|
struct ntlm_type1 type1;
|
|
OM_uint32 major_status;
|
|
OM_uint32 retflags;
|
|
struct ntlm_buf out;
|
|
|
|
major_status = _gss_ntlm_allocate_ctx(minor_status, &ctx);
|
|
if (major_status)
|
|
return major_status;
|
|
*context_handle = (gss_ctx_id_t)ctx;
|
|
|
|
/* check if the mechs is allowed by remote service */
|
|
major_status = (*ctx->server->nsi_probe)(minor_status, ctx->ictx, NULL);
|
|
if (major_status) {
|
|
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
|
|
return major_status;
|
|
}
|
|
|
|
data.data = input_token_buffer->value;
|
|
data.length = input_token_buffer->length;
|
|
|
|
ret = heim_ntlm_decode_type1(&data, &type1);
|
|
if (ret) {
|
|
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
|
|
*minor_status = ret;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
|
|
if ((type1.flags & NTLM_NEG_UNICODE) == 0) {
|
|
heim_ntlm_free_type1(&type1);
|
|
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
|
|
*minor_status = EINVAL;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
|
|
if (type1.flags & NTLM_NEG_SIGN)
|
|
ctx->gssflags |= GSS_C_CONF_FLAG;
|
|
if (type1.flags & NTLM_NEG_SIGN)
|
|
ctx->gssflags |= GSS_C_INTEG_FLAG;
|
|
|
|
major_status = (*ctx->server->nsi_type2)(minor_status,
|
|
ctx->ictx,
|
|
type1.flags,
|
|
type1.hostname,
|
|
type1.domain,
|
|
&retflags,
|
|
&out);
|
|
heim_ntlm_free_type1(&type1);
|
|
if (major_status != GSS_S_COMPLETE) {
|
|
OM_uint32 junk;
|
|
_gss_ntlm_delete_sec_context(&junk, context_handle, NULL);
|
|
return major_status;
|
|
}
|
|
|
|
output_token->value = malloc(out.length);
|
|
if (output_token->value == NULL) {
|
|
OM_uint32 junk;
|
|
_gss_ntlm_delete_sec_context(&junk, context_handle, NULL);
|
|
*minor_status = ENOMEM;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
memcpy(output_token->value, out.data, out.length);
|
|
output_token->length = out.length;
|
|
|
|
ctx->flags = retflags;
|
|
|
|
return GSS_S_CONTINUE_NEEDED;
|
|
} else {
|
|
OM_uint32 maj_stat;
|
|
struct ntlm_type3 type3;
|
|
struct ntlm_buf session;
|
|
|
|
ctx = (ntlm_ctx)*context_handle;
|
|
|
|
data.data = input_token_buffer->value;
|
|
data.length = input_token_buffer->length;
|
|
|
|
ret = heim_ntlm_decode_type3(&data, 1, &type3);
|
|
if (ret) {
|
|
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
|
|
*minor_status = ret;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
|
|
maj_stat = (*ctx->server->nsi_type3)(minor_status,
|
|
ctx->ictx,
|
|
&type3,
|
|
&session);
|
|
if (maj_stat) {
|
|
heim_ntlm_free_type3(&type3);
|
|
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
|
|
return maj_stat;
|
|
}
|
|
|
|
if (src_name) {
|
|
ntlm_name n = calloc(1, sizeof(*n));
|
|
if (n) {
|
|
n->user = strdup(type3.username);
|
|
n->domain = strdup(type3.targetname);
|
|
}
|
|
if (n == NULL || n->user == NULL || n->domain == NULL) {
|
|
heim_ntlm_free_type3(&type3);
|
|
_gss_ntlm_delete_sec_context(minor_status,
|
|
context_handle, NULL);
|
|
return maj_stat;
|
|
}
|
|
*src_name = (gss_name_t)n;
|
|
}
|
|
|
|
heim_ntlm_free_type3(&type3);
|
|
|
|
ret = krb5_data_copy(&ctx->sessionkey,
|
|
session.data, session.length);
|
|
if (ret) {
|
|
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
|
|
*minor_status = ret;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
|
|
if (session.length != 0) {
|
|
|
|
ctx->status |= STATUS_SESSIONKEY;
|
|
|
|
if (ctx->flags & NTLM_NEG_NTLM2_SESSION) {
|
|
_gss_ntlm_set_key(&ctx->u.v2.send, 1,
|
|
(ctx->flags & NTLM_NEG_KEYEX),
|
|
ctx->sessionkey.data,
|
|
ctx->sessionkey.length);
|
|
_gss_ntlm_set_key(&ctx->u.v2.recv, 0,
|
|
(ctx->flags & NTLM_NEG_KEYEX),
|
|
ctx->sessionkey.data,
|
|
ctx->sessionkey.length);
|
|
} else {
|
|
RC4_set_key(&ctx->u.v1.crypto_send.key,
|
|
ctx->sessionkey.length,
|
|
ctx->sessionkey.data);
|
|
RC4_set_key(&ctx->u.v1.crypto_recv.key,
|
|
ctx->sessionkey.length,
|
|
ctx->sessionkey.data);
|
|
}
|
|
}
|
|
|
|
if (mech_type)
|
|
*mech_type = GSS_NTLM_MECHANISM;
|
|
if (time_rec)
|
|
*time_rec = GSS_C_INDEFINITE;
|
|
|
|
ctx->status |= STATUS_OPEN;
|
|
|
|
if (ret_flags)
|
|
*ret_flags = ctx->gssflags;
|
|
|
|
return GSS_S_COMPLETE;
|
|
}
|
|
}
|