| Current Path : /usr/src/crypto/heimdal/lib/gssapi/ntlm/ |
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/ntlm/init_sec_context.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: init_sec_context.c 22382 2007-12-30 12:13:17Z lha $");
static int
from_file(const char *fn, const char *target_domain,
char **username, struct ntlm_buf *key)
{
char *str, buf[1024];
FILE *f;
f = fopen(fn, "r");
if (f == NULL)
return ENOENT;
while (fgets(buf, sizeof(buf), f) != NULL) {
char *d, *u, *p;
buf[strcspn(buf, "\r\n")] = '\0';
if (buf[0] == '#')
continue;
str = NULL;
d = strtok_r(buf, ":", &str);
if (d && strcasecmp(target_domain, d) != 0)
continue;
u = strtok_r(NULL, ":", &str);
p = strtok_r(NULL, ":", &str);
if (u == NULL || p == NULL)
continue;
*username = strdup(u);
heim_ntlm_nt_key(p, key);
memset(buf, 0, sizeof(buf));
fclose(f);
return 0;
}
memset(buf, 0, sizeof(buf));
fclose(f);
return ENOENT;
}
static int
get_user_file(const ntlm_name target_name,
char **username, struct ntlm_buf *key)
{
const char *fn;
if (issuid())
return ENOENT;
fn = getenv("NTLM_USER_FILE");
if (fn == NULL)
return ENOENT;
if (from_file(fn, target_name->domain, username, key) == 0)
return 0;
return ENOENT;
}
/*
* Pick up the ntlm cred from the default krb5 credential cache.
*/
static int
get_user_ccache(const ntlm_name name, char **username, struct ntlm_buf *key)
{
krb5_principal client;
krb5_context context = NULL;
krb5_error_code ret;
krb5_ccache id = NULL;
krb5_creds mcreds, creds;
*username = NULL;
key->length = 0;
key->data = NULL;
memset(&creds, 0, sizeof(creds));
memset(&mcreds, 0, sizeof(mcreds));
ret = krb5_init_context(&context);
if (ret)
return ret;
ret = krb5_cc_default(context, &id);
if (ret)
goto out;
ret = krb5_cc_get_principal(context, id, &client);
if (ret)
goto out;
ret = krb5_unparse_name_flags(context, client,
KRB5_PRINCIPAL_UNPARSE_NO_REALM,
username);
if (ret)
goto out;
ret = krb5_make_principal(context, &mcreds.server,
krb5_principal_get_realm(context, client),
"@ntlm-key", name->domain, NULL);
krb5_free_principal(context, client);
if (ret)
goto out;
mcreds.session.keytype = ENCTYPE_ARCFOUR_HMAC_MD5;
ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_MATCH_KEYTYPE,
&mcreds, &creds);
if (ret) {
char *s = krb5_get_error_message(context, ret);
krb5_free_error_string(context, s);
goto out;
}
key->data = malloc(creds.session.keyvalue.length);
if (key->data == NULL)
goto out;
key->length = creds.session.keyvalue.length;
memcpy(key->data, creds.session.keyvalue.data, key->length);
krb5_free_cred_contents(context, &creds);
return 0;
out:
if (*username) {
free(*username);
*username = NULL;
}
krb5_free_cred_contents(context, &creds);
if (mcreds.server)
krb5_free_principal(context, mcreds.server);
if (id)
krb5_cc_close(context, id);
if (context)
krb5_free_context(context);
return ret;
}
int
_gss_ntlm_get_user_cred(const ntlm_name target_name,
ntlm_cred *rcred)
{
ntlm_cred cred;
int ret;
cred = calloc(1, sizeof(*cred));
if (cred == NULL)
return ENOMEM;
ret = get_user_file(target_name, &cred->username, &cred->key);
if (ret)
ret = get_user_ccache(target_name, &cred->username, &cred->key);
if (ret) {
free(cred);
return ret;
}
cred->domain = strdup(target_name->domain);
*rcred = cred;
return ret;
}
static int
_gss_copy_cred(ntlm_cred from, ntlm_cred *to)
{
*to = calloc(1, sizeof(*to));
if (*to == NULL)
return ENOMEM;
(*to)->username = strdup(from->username);
if ((*to)->username == NULL) {
free(*to);
return ENOMEM;
}
(*to)->domain = strdup(from->domain);
if ((*to)->domain == NULL) {
free((*to)->username);
free(*to);
return ENOMEM;
}
(*to)->key.data = malloc(from->key.length);
if ((*to)->key.data == NULL) {
free((*to)->domain);
free((*to)->username);
free(*to);
return ENOMEM;
}
memcpy((*to)->key.data, from->key.data, from->key.length);
(*to)->key.length = from->key.length;
return 0;
}
OM_uint32
_gss_ntlm_init_sec_context
(OM_uint32 * minor_status,
const gss_cred_id_t initiator_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
)
{
ntlm_ctx ctx;
ntlm_name name = (ntlm_name)target_name;
*minor_status = 0;
if (ret_flags)
*ret_flags = 0;
if (time_rec)
*time_rec = 0;
if (actual_mech_type)
*actual_mech_type = GSS_C_NO_OID;
if (*context_handle == GSS_C_NO_CONTEXT) {
struct ntlm_type1 type1;
struct ntlm_buf data;
uint32_t flags = 0;
int ret;
ctx = calloc(1, sizeof(*ctx));
if (ctx == NULL) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
*context_handle = (gss_ctx_id_t)ctx;
if (initiator_cred_handle != GSS_C_NO_CREDENTIAL) {
ntlm_cred cred = (ntlm_cred)initiator_cred_handle;
ret = _gss_copy_cred(cred, &ctx->client);
} else
ret = _gss_ntlm_get_user_cred(name, &ctx->client);
if (ret) {
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
if (req_flags & GSS_C_CONF_FLAG)
flags |= NTLM_NEG_SEAL;
if (req_flags & GSS_C_INTEG_FLAG)
flags |= NTLM_NEG_SIGN;
else
flags |= NTLM_NEG_ALWAYS_SIGN;
flags |= NTLM_NEG_UNICODE;
flags |= NTLM_NEG_NTLM;
flags |= NTLM_NEG_NTLM2_SESSION;
flags |= NTLM_NEG_KEYEX;
memset(&type1, 0, sizeof(type1));
type1.flags = flags;
type1.domain = name->domain;
type1.hostname = NULL;
type1.os[0] = 0;
type1.os[1] = 0;
ret = heim_ntlm_encode_type1(&type1, &data);
if (ret) {
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
output_token->value = data.data;
output_token->length = data.length;
return GSS_S_CONTINUE_NEEDED;
} else {
krb5_error_code ret;
struct ntlm_type2 type2;
struct ntlm_type3 type3;
struct ntlm_buf data;
ctx = (ntlm_ctx)*context_handle;
data.data = input_token->value;
data.length = input_token->length;
ret = heim_ntlm_decode_type2(&data, &type2);
if (ret) {
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
ctx->flags = type2.flags;
/* XXX check that type2.targetinfo matches `target_name´ */
/* XXX check verify targetinfo buffer */
memset(&type3, 0, sizeof(type3));
type3.username = ctx->client->username;
type3.flags = type2.flags;
type3.targetname = type2.targetname;
type3.ws = rk_UNCONST("workstation");
/*
* NTLM Version 1 if no targetinfo buffer.
*/
if (1 || type2.targetinfo.length == 0) {
struct ntlm_buf sessionkey;
if (type2.flags & NTLM_NEG_NTLM2_SESSION) {
unsigned char nonce[8];
if (RAND_bytes(nonce, sizeof(nonce)) != 1) {
_gss_ntlm_delete_sec_context(minor_status,
context_handle, NULL);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
ret = heim_ntlm_calculate_ntlm2_sess(nonce,
type2.challange,
ctx->client->key.data,
&type3.lm,
&type3.ntlm);
} else {
ret = heim_ntlm_calculate_ntlm1(ctx->client->key.data,
ctx->client->key.length,
type2.challange,
&type3.ntlm);
}
if (ret) {
_gss_ntlm_delete_sec_context(minor_status,context_handle,NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = heim_ntlm_build_ntlm1_master(ctx->client->key.data,
ctx->client->key.length,
&sessionkey,
&type3.sessionkey);
if (ret) {
if (type3.lm.data)
free(type3.lm.data);
if (type3.ntlm.data)
free(type3.ntlm.data);
_gss_ntlm_delete_sec_context(minor_status,context_handle,NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_data_copy(&ctx->sessionkey,
sessionkey.data, sessionkey.length);
free(sessionkey.data);
if (ret) {
if (type3.lm.data)
free(type3.lm.data);
if (type3.ntlm.data)
free(type3.ntlm.data);
_gss_ntlm_delete_sec_context(minor_status,context_handle,NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
ctx->status |= STATUS_SESSIONKEY;
} else {
struct ntlm_buf sessionkey;
unsigned char ntlmv2[16];
struct ntlm_targetinfo ti;
/* verify infotarget */
ret = heim_ntlm_decode_targetinfo(&type2.targetinfo, 1, &ti);
if(ret) {
_gss_ntlm_delete_sec_context(minor_status,
context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
if (ti.domainname && strcmp(ti.domainname, name->domain) != 0) {
_gss_ntlm_delete_sec_context(minor_status,
context_handle, NULL);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
ret = heim_ntlm_calculate_ntlm2(ctx->client->key.data,
ctx->client->key.length,
ctx->client->username,
name->domain,
type2.challange,
&type2.targetinfo,
ntlmv2,
&type3.ntlm);
if (ret) {
_gss_ntlm_delete_sec_context(minor_status,
context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = heim_ntlm_build_ntlm1_master(ntlmv2, sizeof(ntlmv2),
&sessionkey,
&type3.sessionkey);
memset(ntlmv2, 0, sizeof(ntlmv2));
if (ret) {
_gss_ntlm_delete_sec_context(minor_status,
context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
ctx->flags |= NTLM_NEG_NTLM2_SESSION;
ret = krb5_data_copy(&ctx->sessionkey,
sessionkey.data, sessionkey.length);
free(sessionkey.data);
}
if (ctx->flags & NTLM_NEG_NTLM2_SESSION) {
ctx->status |= STATUS_SESSIONKEY;
_gss_ntlm_set_key(&ctx->u.v2.send, 0, (ctx->flags & NTLM_NEG_KEYEX),
ctx->sessionkey.data,
ctx->sessionkey.length);
_gss_ntlm_set_key(&ctx->u.v2.recv, 1, (ctx->flags & NTLM_NEG_KEYEX),
ctx->sessionkey.data,
ctx->sessionkey.length);
} else {
ctx->status |= STATUS_SESSIONKEY;
RC4_set_key(&ctx->u.v1.crypto_recv.key,
ctx->sessionkey.length,
ctx->sessionkey.data);
RC4_set_key(&ctx->u.v1.crypto_send.key,
ctx->sessionkey.length,
ctx->sessionkey.data);
}
ret = heim_ntlm_encode_type3(&type3, &data);
free(type3.sessionkey.data);
if (type3.lm.data)
free(type3.lm.data);
if (type3.ntlm.data)
free(type3.ntlm.data);
if (ret) {
_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
*minor_status = ret;
return GSS_S_FAILURE;
}
output_token->length = data.length;
output_token->value = data.data;
if (actual_mech_type)
*actual_mech_type = GSS_NTLM_MECHANISM;
if (ret_flags)
*ret_flags = 0;
if (time_rec)
*time_rec = GSS_C_INDEFINITE;
ctx->status |= STATUS_OPEN;
return GSS_S_COMPLETE;
}
}