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samba-mirror/auth/gensec/gensec_util.c
Volker Lendecke 57a0bc9a9f lib: Use asn1_has_error()
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2016-01-06 00:54:18 +01:00

113 lines
3.4 KiB
C

/*
Unix SMB/CIFS implementation.
Generic Authentication Interface
Copyright (C) Andrew Tridgell 2003
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "auth/gensec/gensec.h"
#include "auth/gensec/gensec_internal.h"
#include "auth/common_auth.h"
#include "../lib/util/asn1.h"
NTSTATUS gensec_generate_session_info_pac(TALLOC_CTX *mem_ctx,
struct gensec_security *gensec_security,
struct smb_krb5_context *smb_krb5_context,
DATA_BLOB *pac_blob,
const char *principal_string,
const struct tsocket_address *remote_address,
struct auth_session_info **session_info)
{
uint32_t session_info_flags = 0;
if (gensec_security->want_features & GENSEC_FEATURE_UNIX_TOKEN) {
session_info_flags |= AUTH_SESSION_INFO_UNIX_TOKEN;
}
session_info_flags |= AUTH_SESSION_INFO_DEFAULT_GROUPS;
if (!pac_blob) {
if (gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access\n",
principal_string));
return NT_STATUS_ACCESS_DENIED;
}
DEBUG(1, ("Unable to find PAC for %s, resorting to local user lookup\n",
principal_string));
}
if (gensec_security->auth_context && gensec_security->auth_context->generate_session_info_pac) {
return gensec_security->auth_context->generate_session_info_pac(gensec_security->auth_context,
mem_ctx,
smb_krb5_context,
pac_blob,
principal_string,
remote_address,
session_info_flags,
session_info);
} else {
DEBUG(0, ("Cannot generate a session_info without the auth_context\n"));
return NT_STATUS_INTERNAL_ERROR;
}
}
/*
magic check a GSS-API wrapper packet for an Kerberos OID
*/
static bool gensec_gssapi_check_oid(const DATA_BLOB *blob, const char *oid)
{
bool ret = false;
struct asn1_data *data = asn1_init(NULL);
if (!data) return false;
if (!asn1_load(data, *blob)) goto err;
if (!asn1_start_tag(data, ASN1_APPLICATION(0))) goto err;
if (!asn1_check_OID(data, oid)) goto err;
ret = !asn1_has_error(data);
err:
asn1_free(data);
return ret;
}
/**
* Check if the packet is one for the KRB5 mechansim
*
* NOTE: This is a helper that can be employed by multiple mechanisms, do
* not make assumptions about the private_data
*
* @param gensec_security GENSEC state, unused
* @param in The request, as a DATA_BLOB
* @return Error, INVALID_PARAMETER if it's not a packet for us
* or NT_STATUS_OK if the packet is ok.
*/
NTSTATUS gensec_magic_check_krb5_oid(struct gensec_security *unused,
const DATA_BLOB *blob)
{
if (gensec_gssapi_check_oid(blob, GENSEC_OID_KERBEROS5)) {
return NT_STATUS_OK;
} else {
return NT_STATUS_INVALID_PARAMETER;
}
}