pjs/extensions/auth/nsAuthGSSAPI.cpp

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/* vim:set ts=4 sw=4 sts=4 et cindent: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Negotiateauth
*
* The Initial Developer of the Original Code is Daniel Kouril.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Daniel Kouril <kouril@ics.muni.cz> (original author)
* Wyllys Ingersoll <wyllys.ingersoll@sun.com>
* Christopher Nebergall <cneberg@sandia.gov>
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//
// GSSAPI Authentication Support Module
//
// Described by IETF Internet draft: draft-brezak-kerberos-http-00.txt
// (formerly draft-brezak-spnego-http-04.txt)
//
// Also described here:
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsecure/html/http-sso-1.asp
//
#include "nsNegotiateAuth.h"
#include "nsNegotiateAuthGSSAPI.h"
//-----------------------------------------------------------------------------
#if defined( PR_LOGGING )
// Generate proper GSSAPI error messages from the major and
// minor status codes.
void
LogGssError(OM_uint32 maj_stat, OM_uint32 min_stat, const char *prefix)
{
OM_uint32 new_stat;
OM_uint32 msg_ctx = 0;
gss_buffer_desc status1_string;
gss_buffer_desc status2_string;
OM_uint32 ret;
nsCAutoString error(prefix);
error += ": ";
do {
ret = gss_display_status (&new_stat,
maj_stat,
GSS_C_GSS_CODE,
GSS_C_NULL_OID,
&msg_ctx,
&status1_string);
error += (const char *) status1_string.value;
error += '\n';
ret = gss_display_status (&new_stat,
min_stat,
GSS_C_MECH_CODE,
GSS_C_NULL_OID,
&msg_ctx,
&status2_string);
error += (const char *) status2_string.value;
error += '\n';
} while (!GSS_ERROR(ret) && msg_ctx != 0);
LOG(("%s\n", error.get()));
}
#else /* PR_LOGGING */
#define LogGssError(x,y,z)
#endif /* PR_LOGGING */
//-----------------------------------------------------------------------------
nsNegotiateAuth::nsNegotiateAuth()
: mServiceFlags(REQ_DEFAULT)
{
OM_uint32 minstat, majstat;
gss_OID_set mech_set;
gss_OID item;
unsigned int i;
static gss_OID_desc gss_krb5_mech_oid_desc =
{9, (void *) "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02"};
static gss_OID_desc gss_spnego_mech_oid_desc =
{6, (void *) "\x2b\x06\x01\x05\x05\x02"};
mCtx = GSS_C_NO_CONTEXT;
mMechOID = &gss_krb5_mech_oid_desc;
//
// Now, look at the list of supported mechanisms,
// if SPNEGO is found, then use it.
// Otherwise, set the desired mechanism to
// GSS_C_NO_OID and let the system try to use
// the default mechanism.
//
// Using Kerberos directly (instead of negotiating
// with SPNEGO) may work in some cases depending
// on how smart the server side is.
//
majstat = gss_indicate_mechs(&minstat, &mech_set);
if (GSS_ERROR(majstat))
return;
for (i=0; i<mech_set->count; i++) {
item = &mech_set->elements[i];
if (item->length == gss_spnego_mech_oid_desc.length &&
!memcmp(item->elements, gss_spnego_mech_oid_desc.elements,
item->length)) {
// ok, we found it
mMechOID = &gss_spnego_mech_oid_desc;
break;
}
}
gss_release_oid_set(&minstat, &mech_set);
}
void
nsNegotiateAuth::Reset()
{
if (mCtx != GSS_C_NO_CONTEXT) {
OM_uint32 minor_status;
gss_delete_sec_context(&minor_status, &mCtx, GSS_C_NO_BUFFER);
}
mCtx = GSS_C_NO_CONTEXT;
}
NS_IMPL_ISUPPORTS1(nsNegotiateAuth, nsIAuthModule)
NS_IMETHODIMP
nsNegotiateAuth::Init(const char *serviceName,
PRUint32 serviceFlags,
const PRUnichar *domain,
const PRUnichar *username,
const PRUnichar *password)
{
// we don't expect to be passed any user credentials
NS_ASSERTION(!domain && !username && !password, "unexpected credentials");
// it's critial that the caller supply a service name to be used
NS_ENSURE_TRUE(serviceName && *serviceName, NS_ERROR_INVALID_ARG);
mServiceName = serviceName;
mServiceFlags = serviceFlags;
return NS_OK;
}
NS_IMETHODIMP
nsNegotiateAuth::GetNextToken(const void *inToken,
PRUint32 inTokenLen,
void **outToken,
PRUint32 *outTokenLen)
{
OM_uint32 major_status, minor_status;
OM_uint32 req_flags = 0;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
gss_buffer_t in_token_ptr = GSS_C_NO_BUFFER;
gss_name_t server;
LOG(("entering nsNegotiateAuth::GetNextToken()\n"));
if (mServiceFlags & REQ_DELEGATE)
req_flags |= GSS_C_DELEG_FLAG;
input_token.value = (void *)mServiceName.get();
input_token.length = mServiceName.Length() + 1;
major_status = gss_import_name(&minor_status,
&input_token,
#ifdef HAVE_GSS_C_NT_HOSTBASED_SERVICE
GSS_C_NT_HOSTBASED_SERVICE,
#else
gss_nt_service_name,
#endif
&server);
input_token.value = NULL;
input_token.length = 0;
if (GSS_ERROR(major_status)) {
LogGssError(major_status, minor_status, "gss_import_name() failed");
return NS_ERROR_FAILURE;
}
if (inToken) {
input_token.length = inTokenLen;
input_token.value = (void *) inToken;
in_token_ptr = &input_token;
}
else if (mCtx != GSS_C_NO_CONTEXT) {
//
// Possibly starting over, clear out any existing context.
//
Reset();
}
major_status = gss_init_sec_context(&minor_status,
GSS_C_NO_CREDENTIAL,
&mCtx,
server,
mMechOID,
req_flags,
GSS_C_INDEFINITE,
GSS_C_NO_CHANNEL_BINDINGS,
in_token_ptr,
nsnull,
&output_token,
nsnull,
nsnull);
nsresult rv;
if (GSS_ERROR(major_status)) {
LogGssError(major_status, minor_status, "gss_init_sec_context() failed");
Reset();
rv = NS_ERROR_FAILURE;
goto end;
}
if (major_status == GSS_S_COMPLETE) {
//
// We are done with this authentication, reset the context.
//
Reset();
}
else if (major_status == GSS_S_CONTINUE_NEEDED) {
//
// The important thing is that we do NOT reset the
// context here because it will be needed on the
// next call.
//
}
if (output_token.length == 0) {
LOG((" No GSS output token to send, exiting"));
rv = NS_ERROR_FAILURE;
goto end;
}
*outTokenLen = output_token.length;
*outToken = nsMemory::Clone(output_token.value, output_token.length);
gss_release_buffer(&minor_status, &output_token);
rv = NS_OK;
end:
gss_release_name(&minor_status, &server);
LOG((" leaving nsNegotiateAuth::GetNextToken [rv=%x]", rv));
return rv;
}