mozilla
/
pjs
зеркало из https://github.com/mozilla/pjs.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

fixes bug 239734 "negotiateauth extension should not request mutual auth" patch by wyllys.ingersoll@sun.com r=cneberg@sandia.gov sr=darin a=mkaply

This commit is contained in:
darin%meer.net 2004-04-06 21:15:56 +00:00
Родитель 391ba2adfa
Коммит 226952170d
1 изменённых файлов: 0 добавлений и 613 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

613
extensions/negotiateauth/nsHttpGssapiAuth.cpp
Просмотреть файл

@ -1,613 +0,0 @@
/* 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
//
// this #define must run before prlog.h is included
#ifdef MOZ_LOGGING
#define FORCE_PR_LOG 1
#endif
#include <string.h>
#include <stdlib.h>
#if defined(HAVE_GSSAPI_H)
#include <gssapi.h>
#elif defined(HAVE_GSSAPI_GSSAPI_H)
#include <gssapi/gssapi.h>
#endif
#if defined(HAVE_GSSAPI_GENERIC_H)
#include <gssapi_generic.h>
#elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
#include <gssapi/gssapi_generic.h>
#endif
#include "nsIHttpChannel.h"
#include "nsISupportsUtils.h"
#include "nsIServiceManager.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIURI.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsNetCID.h"
#include "plbase64.h"
#include "plstr.h"
#include "prprf.h"
#include "prlog.h"
#include "prmem.h"
#include "nsHttpGssapiAuth.h"
//-----------------------------------------------------------------------------
#ifdef PR_LOGGING
//
// in order to do logging, the following environment variables need to be set:
//
// set NSPR_LOG_MODULES=negotiateauth:4
// set NSPR_LOG_FILE=negotiateauth.log
//
static PRLogModuleInfo* gNegotiateLog;
#define LOG(args) PR_LOG(gNegotiateLog, PR_LOG_DEBUG, args)
// 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 LOG(args)
#define LogGssError(x,y,z)
#endif /* PR_LOGGING */
//-----------------------------------------------------------------------------
static const char kNegotiate[] = "Negotiate";
static const char kNegotiateAuthTrustedURIs[] = "network.negotiate-auth.trusted-uris";
static const char kNegotiateAuthDelegationURIs[] = "network.negotiate-auth.delegation-uris";
#define kNegotiateLen (sizeof(kNegotiate)-1)
class nsGssapiContinuationState : public nsISupports
{
public:
NS_DECL_ISUPPORTS
nsGssapiContinuationState();
~nsGssapiContinuationState() { Reset(); }
void Reset();
gss_OID GetOID() { return mech_oid; }
gss_ctx_id_t mCtx;
private:
gss_OID mech_oid;
};
nsGssapiContinuationState::nsGssapiContinuationState()
{
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;
mech_oid = &gss_krb5_mech_oid_desc;
int mech_found = 0;
//
// 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 && !mech_found; 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)) {
mech_found = 1;
mech_oid = &gss_spnego_mech_oid_desc;
break;
}
}
gss_release_oid_set(&minstat, &mech_set);
}
void
nsGssapiContinuationState::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_ISUPPORTS0(nsGssapiContinuationState)
//-----------------------------------------------------------------------------
nsHttpGssapiAuth::nsHttpGssapiAuth()
{
#ifdef PR_LOGGING
if (!gNegotiateLog)
gNegotiateLog = PR_NewLogModule("negotiateauth");
#endif
}
NS_IMETHODIMP
nsHttpGssapiAuth::GetAuthFlags(PRUint32 *flags)
{
//
// GSSAPI creds should not be reused across multiple requests.
// Only perform the negotiation when it is explicitly requested
// by the server. Thus, do *NOT* use the "REUSABLE_CREDENTIALS"
// flag here.
//
// CONNECTION_BASED is specified instead of REQUEST_BASED since
// we need to complete a sequence of transactions with the server
// over the same connection.
//
*flags = CONNECTION_BASED | IDENTITY_IGNORED;
return NS_OK;
}
//
// Always set *identityInvalid == FALSE here. This
// will prevent the browser from popping up the authentication
// prompt window. Because GSSAPI does not have an API
// for fetching initial credentials (ex: A Kerberos TGT),
// there is no correct way to get the users credentials.
//
NS_IMETHODIMP
nsHttpGssapiAuth::ChallengeReceived(nsIHttpChannel *httpChannel,
const char *challenge,
PRBool isProxyAuth,
nsISupports **sessionState,
nsISupports **continuationState,
PRBool *identityInvalid)
{
nsGssapiContinuationState *state = (nsGssapiContinuationState *) *continuationState;
*identityInvalid = PR_FALSE;
// proxy auth not supported
if (isProxyAuth)
return NS_ERROR_ABORT;
PRBool allowed = TestPref(httpChannel, kNegotiateAuthTrustedURIs);
if (!allowed) {
LOG(("nsHttpNegotiateAuth::ChallengeReceived URI blocked\n"));
return NS_ERROR_ABORT;
}
//
// Use this opportunity to instantiate the state object
// that gets used later when we generate the credentials.
//
if (!state) {
state = new nsGssapiContinuationState();
if (!state)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*continuationState = state);
}
return NS_OK;
}
NS_IMPL_ISUPPORTS1(nsHttpGssapiAuth, nsIHttpAuthenticator)
//
// GenerateCredentials
//
// This routine is responsible for creating the correct authentication
// blob to pass to the server that requested "Negotiate" authentication.
//
NS_IMETHODIMP
nsHttpGssapiAuth::GenerateCredentials(nsIHttpChannel *httpChannel,
const char *challenge,
PRBool isProxyAuth,
const PRUnichar *domain,
const PRUnichar *username,
const PRUnichar *password,
nsISupports **sessionState,
nsISupports **continuationState,
char **creds)
{
OM_uint32 major_status, minor_status;
OM_uint32 req_flags = GSS_C_MUTUAL_FLAG;
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;
nsGssapiContinuationState *state = (nsGssapiContinuationState *) *continuationState;
nsCOMPtr<nsIURI> uri;
nsresult rv;
nsCString service;
LOG(("nsHttpGssapiAuth::GenerateCredentials() [challenge=%s]\n", challenge));
NS_ASSERTION(creds, "null param");
PRBool isGssapiAuth =
!PL_strncasecmp(challenge, kNegotiate, kNegotiateLen);
NS_ENSURE_TRUE(isGssapiAuth, NS_ERROR_UNEXPECTED);
// proxy auth not supported
if (isProxyAuth)
return NS_ERROR_ABORT;
PRBool delegation = TestPref(httpChannel, kNegotiateAuthDelegationURIs);
if (delegation) {
LOG((" using GSS_C_DELEG_FLAG\n"));
req_flags |= GSS_C_DELEG_FLAG;
}
rv = httpChannel->GetURI(getter_AddRefs(uri));
if (NS_FAILED(rv)) return rv;
rv = uri->GetAsciiHost(service);
if (NS_FAILED(rv)) return rv;
LOG((" hostname = %s\n", service.get()));
//
// The correct service name for IIS servers is "HTTP/f.q.d.n", so
// construct the proper service name for passing to "gss_import_name".
//
// TODO: Possibly make this a configurable service name for use
// with non-standard servers that use stuff like "khttp/f.q.d.n"
// instead.
//
service.Insert("HTTP@", 0);
input_token.value = (void *)service.get();
input_token.length = service.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 the "Negotiate:" header had some data associated with it,
// that data should be used as the input to this call. This may
// be a continuation of an earlier call because GSSAPI authentication
// often takes multiple round-trips to complete depending on the
// context flags given. We want to use MUTUAL_AUTHENTICATION which
// generally *does* require multiple round-trips. Don't assume
// auth can be completed in just 1 call.
//
unsigned int len = strlen(challenge);
if (len > kNegotiateLen) {
challenge += kNegotiateLen;
while (*challenge == ' ') challenge++;
len = strlen(challenge);
input_token.length = (len * 3)/4;
input_token.value = malloc(input_token.length);
if (!input_token.value)
return (NS_ERROR_OUT_OF_MEMORY);
//
// Decode the response that followed the "Negotiate" token
//
if (PL_Base64Decode(challenge, len, (char *) input_token.value) == NULL) {
free(input_token.value);
return(NS_ERROR_UNEXPECTED);
}
in_token_ptr = &input_token;
}
else {
//
// Starting over, clear out any existing context and don't
// use an input token.
//
state->Reset();
in_token_ptr = GSS_C_NO_BUFFER;
}
major_status = gss_init_sec_context(&minor_status,
GSS_C_NO_CREDENTIAL,
&state->mCtx,
server,
state->GetOID(),
req_flags,
GSS_C_INDEFINITE,
GSS_C_NO_CHANNEL_BINDINGS,
in_token_ptr,
nsnull,
&output_token,
nsnull,
nsnull);
if (GSS_ERROR(major_status)) {
LogGssError(major_status, minor_status, "gss_init_sec_context() failed");
gss_release_name(&minor_status, &server);
state->Reset();
if (input_token.length > 0 && input_token.value != NULL)
gss_release_buffer(&minor_status, &input_token);
return NS_ERROR_FAILURE;
}
if (major_status == GSS_S_COMPLETE) {
//
// We are done with this authentication, reset the context.
//
state->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.
//
}
// We don't need the input token data anymore.
if (input_token.length > 0 && input_token.value != NULL)
gss_release_buffer(&minor_status, &input_token);
if (output_token.length == 0) {
LOG((" No GSS output token to send, exiting"));
gss_release_name(&minor_status, &server);
return NS_ERROR_FAILURE;
}
//
// The token output from the gss_init_sec_context call is
// encoded and used as the Authentication response for the
// server.
//
char *encoded_token = PL_Base64Encode((char *)output_token.value,
output_token.length,
nsnull);
if (!encoded_token) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto end;
}
LOG((" Sending a token of length %d\n", output_token.length));
// allocate a buffer sizeof("Negotiate" + " " + b64output_token + "\0")
*creds = (char *) nsMemory::Alloc (kNegotiateLen + 1 + strlen(encoded_token) + 1);
if (!(*creds)) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto end;
}
sprintf(*creds, "%s %s", kNegotiate, encoded_token);
rv = NS_OK;
end:
if (encoded_token)
PR_Free(encoded_token);
gss_release_buffer(&minor_status, &output_token);
gss_release_name(&minor_status, &server);
LOG((" returning the call"));
return rv;
}
PRBool
nsHttpGssapiAuth::TestPref(nsIHttpChannel *httpChannel, const char *pref)
{
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (!prefs)
return PR_FALSE;
nsCOMPtr<nsIURI> uri;
httpChannel->GetURI(getter_AddRefs(uri));
if (!uri)
return PR_FALSE;
nsCAutoString scheme, host;
PRInt32 port;
if (NS_FAILED(uri->GetScheme(scheme)))
return PR_FALSE;
if (NS_FAILED(uri->GetAsciiHost(host)))
return PR_FALSE;
if (NS_FAILED(uri->GetPort(&port)))
return PR_FALSE;
char *hostList;
if (NS_FAILED(prefs->GetCharPref(pref, &hostList)) || !hostList)
return PR_FALSE;
// pseudo-BNF
// ----------
//
// url-list base-url ( base-url "," LWS )*
// base-url ( scheme-part | host-part | scheme-part host-part )
// scheme-part scheme "://"
// host-part host [":" port]
//
// for example:
// "https://, http://office.foo.com"
//
char *start = hostList, *end;
for (;;) {
// skip past any whitespace
while (*start == ' ' || *start == '\t')
++start;
end = strchr(start, ',');
if (!end)
end = start + strlen(start);
if (start == end)
break;
if (MatchesBaseURI(scheme, host, port, start, end))
return PR_TRUE;
if (*end == '\0')
break;
start = end + 1;
}
nsMemory::Free(hostList);
return PR_FALSE;
}
PRBool
nsHttpGssapiAuth::MatchesBaseURI(const nsCSubstring &matchScheme,
const nsCSubstring &matchHost,
PRInt32 matchPort,
const char *baseStart,
const char *baseEnd)
{
// check if scheme://host:port matches baseURI
// parse the base URI
const char *hostStart, *schemeEnd = strstr(baseStart, "://");
if (schemeEnd) {
// the given scheme must match the parsed scheme exactly
if (!matchScheme.Equals(Substring(baseStart, schemeEnd)))
return PR_FALSE;
hostStart = schemeEnd + 3;
}
else
hostStart = baseStart;
// XXX this does not work for IPv6-literals
const char *hostEnd = strchr(hostStart, ':');
if (hostEnd) {
// the given port must match the parsed port exactly
int port = atoi(hostEnd + 1);
if (matchPort != (PRInt32) port)
return PR_FALSE;
}
else
hostEnd = baseEnd;
// if we didn't parse out a host, then assume we got a match.
if (hostStart == hostEnd)
return PR_TRUE;
PRUint32 hostLen = hostEnd - hostStart;
// now, allow host to be a subdomain of matchHost
if (matchHost.Length() > hostLen)
return PR_FALSE;
const char *end = matchHost.EndReading();
if (PL_strncasecmp(end - hostLen, hostStart, hostLen) == 0) {
// if matchHost ends with host from the base URI, then make sure it is
// either an exact match, or prefixed with a dot. we don't want
// "foobar.com" to match "bar.com"
if (matchHost.Length() == hostLen ||
*(end - hostLen) == '.' ||
*(end - hostLen - 1) == '.')
return PR_TRUE;
}
return PR_FALSE;
}