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gecko/extensions/auth/nsAuthGSSAPI.cpp
Carsten "Tomcat" Book e2f82674b8 Backed out 14 changesets (bug 1165515) for linux x64 e10s m2 test failures 
Backed out changeset d68dcf2ef372 (bug 1165515)
Backed out changeset 7c3b45a47811 (bug 1165515)
Backed out changeset b668b617bef2 (bug 1165515)
Backed out changeset d0916e1283a2 (bug 1165515)
Backed out changeset ac4dc7489942 (bug 1165515)
Backed out changeset e9632ce8bc65 (bug 1165515)
Backed out changeset c16d215cc7e4 (bug 1165515)
Backed out changeset e4d474f3c51a (bug 1165515)
Backed out changeset d87680bf9f7c (bug 1165515)
Backed out changeset b3c0a45ba99e (bug 1165515)
Backed out changeset 9370fa197674 (bug 1165515)
Backed out changeset 50970d668ca1 (bug 1165515)
Backed out changeset ffa4eb6d24b9 (bug 1165515)
Backed out changeset 5fcf1203cc1d (bug 1165515)
2015-06-02 13:05:56 +02:00

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/* vim:set ts=4 sw=4 sts=4 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//
// 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 "mozilla/ArrayUtils.h"
#include "prlink.h"
#include "nsCOMPtr.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIServiceManager.h"
#include "nsNativeCharsetUtils.h"
#include "mozilla/Telemetry.h"
#include "nsAuthGSSAPI.h"
#ifdef XP_MACOSX
#include <Kerberos/Kerberos.h>
#endif
#ifdef XP_MACOSX
typedef KLStatus (*KLCacheHasValidTickets_type)(
KLPrincipal,
KLKerberosVersion,
KLBoolean *,
KLPrincipal *,
char **);
#endif
#if defined(HAVE_RES_NINIT)
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#endif
using namespace mozilla;
//-----------------------------------------------------------------------------
// We define GSS_C_NT_HOSTBASED_SERVICE explicitly since it may be referenced
// by by a different name depending on the implementation of gss but always
// has the same value
static gss_OID_desc gss_c_nt_hostbased_service =
{ 10, (void *) "\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04" };
static const char kNegotiateAuthGssLib[] =
"network.negotiate-auth.gsslib";
static const char kNegotiateAuthNativeImp[] =
"network.negotiate-auth.using-native-gsslib";
static struct GSSFunction {
const char *str;
PRFuncPtr func;
} gssFuncs[] = {
{ "gss_display_status", nullptr },
{ "gss_init_sec_context", nullptr },
{ "gss_indicate_mechs", nullptr },
{ "gss_release_oid_set", nullptr },
{ "gss_delete_sec_context", nullptr },
{ "gss_import_name", nullptr },
{ "gss_release_buffer", nullptr },
{ "gss_release_name", nullptr },
{ "gss_wrap", nullptr },
{ "gss_unwrap", nullptr }
};
static bool gssNativeImp = true;
static PRLibrary* gssLibrary = nullptr;
#define gss_display_status_ptr ((gss_display_status_type)*gssFuncs[0].func)
#define gss_init_sec_context_ptr ((gss_init_sec_context_type)*gssFuncs[1].func)
#define gss_indicate_mechs_ptr ((gss_indicate_mechs_type)*gssFuncs[2].func)
#define gss_release_oid_set_ptr ((gss_release_oid_set_type)*gssFuncs[3].func)
#define gss_delete_sec_context_ptr ((gss_delete_sec_context_type)*gssFuncs[4].func)
#define gss_import_name_ptr ((gss_import_name_type)*gssFuncs[5].func)
#define gss_release_buffer_ptr ((gss_release_buffer_type)*gssFuncs[6].func)
#define gss_release_name_ptr ((gss_release_name_type)*gssFuncs[7].func)
#define gss_wrap_ptr ((gss_wrap_type)*gssFuncs[8].func)
#define gss_unwrap_ptr ((gss_unwrap_type)*gssFuncs[9].func)
#ifdef XP_MACOSX
static PRFuncPtr KLCacheHasValidTicketsPtr;
#define KLCacheHasValidTickets_ptr \
((KLCacheHasValidTickets_type)*KLCacheHasValidTicketsPtr)
#endif
static nsresult
gssInit()
{
nsXPIDLCString libPath;
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->GetCharPref(kNegotiateAuthGssLib, getter_Copies(libPath));
prefs->GetBoolPref(kNegotiateAuthNativeImp, &gssNativeImp);
}
PRLibrary *lib = nullptr;
if (!libPath.IsEmpty()) {
LOG(("Attempting to load user specified library [%s]\n", libPath.get()));
gssNativeImp = false;
lib = PR_LoadLibrary(libPath.get());
}
else {
#ifdef XP_WIN
char *libName = PR_GetLibraryName(nullptr, "gssapi32");
if (libName) {
lib = PR_LoadLibrary("gssapi32");
PR_FreeLibraryName(libName);
}
#elif defined(__OpenBSD__)
/* OpenBSD doesn't register inter-library dependencies in basesystem
* libs therefor we need to load all the libraries gssapi depends on,
* in the correct order and with LD_GLOBAL for GSSAPI auth to work
* fine.
*/
const char *const verLibNames[] = {
"libasn1.so",
"libcrypto.so",
"libroken.so",
"libheimbase.so",
"libcom_err.so",
"libkrb5.so",
"libgssapi.so"
};
PRLibSpec libSpec;
for (size_t i = 0; i < ArrayLength(verLibNames); ++i) {
libSpec.type = PR_LibSpec_Pathname;
libSpec.value.pathname = verLibNames[i];
lib = PR_LoadLibraryWithFlags(libSpec, PR_LD_GLOBAL);
};
#else
const char *const libNames[] = {
"gss",
"gssapi_krb5",
"gssapi"
};
const char *const verLibNames[] = {
"libgssapi_krb5.so.2", /* MIT - FC, Suse10, Debian */
"libgssapi.so.4", /* Heimdal - Suse10, MDK */
"libgssapi.so.1" /* Heimdal - Suse9, CITI - FC, MDK, Suse10*/
};
for (size_t i = 0; i < ArrayLength(verLibNames) && !lib; ++i) {
lib = PR_LoadLibrary(verLibNames[i]);
/* The CITI libgssapi library calls exit() during
* initialization if it's not correctly configured. Try to
* ensure that we never use this library for our GSSAPI
* support, as its just a wrapper library, anyway.
* See Bugzilla #325433
*/
if (lib &&
PR_FindFunctionSymbol(lib,
"internal_krb5_gss_initialize") &&
PR_FindFunctionSymbol(lib, "gssd_pname_to_uid")) {
LOG(("CITI libgssapi found, which calls exit(). Skipping\n"));
PR_UnloadLibrary(lib);
lib = nullptr;
}
}
for (size_t i = 0; i < ArrayLength(libNames) && !lib; ++i) {
char *libName = PR_GetLibraryName(nullptr, libNames[i]);
if (libName) {
lib = PR_LoadLibrary(libName);
PR_FreeLibraryName(libName);
if (lib &&
PR_FindFunctionSymbol(lib,
"internal_krb5_gss_initialize") &&
PR_FindFunctionSymbol(lib, "gssd_pname_to_uid")) {
LOG(("CITI libgssapi found, which calls exit(). Skipping\n"));
PR_UnloadLibrary(lib);
lib = nullptr;
}
}
}
#endif
}
if (!lib) {
LOG(("Fail to load gssapi library\n"));
return NS_ERROR_FAILURE;
}
LOG(("Attempting to load gss functions\n"));
for (size_t i = 0; i < ArrayLength(gssFuncs); ++i) {
gssFuncs[i].func = PR_FindFunctionSymbol(lib, gssFuncs[i].str);
if (!gssFuncs[i].func) {
LOG(("Fail to load %s function from gssapi library\n", gssFuncs[i].str));
PR_UnloadLibrary(lib);
return NS_ERROR_FAILURE;
}
}
#ifdef XP_MACOSX
if (gssNativeImp &&
!(KLCacheHasValidTicketsPtr =
PR_FindFunctionSymbol(lib, "KLCacheHasValidTickets"))) {
LOG(("Fail to load KLCacheHasValidTickets function from gssapi library\n"));
PR_UnloadLibrary(lib);
return NS_ERROR_FAILURE;
}
#endif
gssLibrary = lib;
return NS_OK;
}
// 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)
{
if (!PR_LOG_TEST(gNegotiateLog, PR_LOG_DEBUG)) {
return;
}
OM_uint32 new_stat;
OM_uint32 msg_ctx = 0;
gss_buffer_desc status1_string;
gss_buffer_desc status2_string;
OM_uint32 ret;
nsAutoCString errorStr;
errorStr.Assign(prefix);
if (!gssLibrary)
return;
errorStr += ": ";
do {
ret = gss_display_status_ptr(&new_stat,
maj_stat,
GSS_C_GSS_CODE,
GSS_C_NULL_OID,
&msg_ctx,
&status1_string);
errorStr.Append((const char *) status1_string.value, status1_string.length);
gss_release_buffer_ptr(&new_stat, &status1_string);
errorStr += '\n';
ret = gss_display_status_ptr(&new_stat,
min_stat,
GSS_C_MECH_CODE,
GSS_C_NULL_OID,
&msg_ctx,
&status2_string);
errorStr.Append((const char *) status2_string.value, status2_string.length);
errorStr += '\n';
} while (!GSS_ERROR(ret) && msg_ctx != 0);
LOG(("%s\n", errorStr.get()));
}
//-----------------------------------------------------------------------------
nsAuthGSSAPI::nsAuthGSSAPI(pType package)
: mServiceFlags(REQ_DEFAULT)
{
OM_uint32 minstat;
OM_uint32 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" };
LOG(("entering nsAuthGSSAPI::nsAuthGSSAPI()\n"));
mComplete = false;
if (!gssLibrary && NS_FAILED(gssInit()))
return;
mCtx = GSS_C_NO_CONTEXT;
mMechOID = &gss_krb5_mech_oid_desc;
// if the type is kerberos we accept it as default
// and exit
if (package == PACKAGE_TYPE_KERBEROS)
return;
// 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_ptr(&minstat, &mech_set);
if (GSS_ERROR(majstat))
return;
if (mech_set) {
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_ptr(&minstat, &mech_set);
}
}
void
nsAuthGSSAPI::Reset()
{
if (gssLibrary && mCtx != GSS_C_NO_CONTEXT) {
OM_uint32 minor_status;
gss_delete_sec_context_ptr(&minor_status, &mCtx, GSS_C_NO_BUFFER);
}
mCtx = GSS_C_NO_CONTEXT;
mComplete = false;
}
/* static */ void
nsAuthGSSAPI::Shutdown()
{
if (gssLibrary) {
PR_UnloadLibrary(gssLibrary);
gssLibrary = nullptr;
}
}
/* Limitations apply to this class's thread safety. See the header file */
NS_IMPL_ISUPPORTS(nsAuthGSSAPI, nsIAuthModule)
NS_IMETHODIMP
nsAuthGSSAPI::Init(const char *serviceName,
uint32_t serviceFlags,
const char16_t *domain,
const char16_t *username,
const char16_t *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);
LOG(("entering nsAuthGSSAPI::Init()\n"));
if (!gssLibrary)
return NS_ERROR_NOT_INITIALIZED;
mServiceName = serviceName;
mServiceFlags = serviceFlags;
static bool sTelemetrySent = false;
if (!sTelemetrySent) {
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::NTLM_MODULE_USED_2,
serviceFlags & nsIAuthModule::REQ_PROXY_AUTH
? NTLM_MODULE_KERBEROS_PROXY
: NTLM_MODULE_KERBEROS_DIRECT);
sTelemetrySent = true;
}
return NS_OK;
}
NS_IMETHODIMP
nsAuthGSSAPI::GetNextToken(const void *inToken,
uint32_t inTokenLen,
void **outToken,
uint32_t *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;
nsAutoCString userbuf;
nsresult rv;
LOG(("entering nsAuthGSSAPI::GetNextToken()\n"));
if (!gssLibrary)
return NS_ERROR_NOT_INITIALIZED;
// If they've called us again after we're complete, reset to start afresh.
if (mComplete)
Reset();
if (mServiceFlags & REQ_DELEGATE)
req_flags |= GSS_C_DELEG_FLAG;
if (mServiceFlags & REQ_MUTUAL_AUTH)
req_flags |= GSS_C_MUTUAL_FLAG;
input_token.value = (void *)mServiceName.get();
input_token.length = mServiceName.Length() + 1;
#if defined(HAVE_RES_NINIT)
res_ninit(&_res);
#endif
major_status = gss_import_name_ptr(&minor_status,
&input_token,
&gss_c_nt_hostbased_service,
&server);
input_token.value = nullptr;
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) {
// If there is no input token, then we are starting a new
// authentication sequence. If we have already initialized our
// security context, then we're in trouble because it means that the
// first sequence failed. We need to bail or else we might end up in
// an infinite loop.
LOG(("Cannot restart authentication sequence!"));
return NS_ERROR_UNEXPECTED;
}
#if defined(XP_MACOSX)
// Suppress Kerberos prompts to get credentials. See bug 240643.
// We can only use Mac OS X specific kerb functions if we are using
// the native lib
KLBoolean found;
bool doingMailTask = mServiceName.Find("imap@") ||
mServiceName.Find("pop@") ||
mServiceName.Find("smtp@") ||
mServiceName.Find("ldap@");
if (!doingMailTask && (gssNativeImp &&
(KLCacheHasValidTickets_ptr(nullptr, kerberosVersion_V5, &found, nullptr, nullptr) != klNoErr || !found)))
{
major_status = GSS_S_FAILURE;
minor_status = 0;
}
else
#endif /* XP_MACOSX */
major_status = gss_init_sec_context_ptr(&minor_status,
GSS_C_NO_CREDENTIAL,
&mCtx,
server,
mMechOID,
req_flags,
GSS_C_INDEFINITE,
GSS_C_NO_CHANNEL_BINDINGS,
in_token_ptr,
nullptr,
&output_token,
nullptr,
nullptr);
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) {
// Mark ourselves as being complete, so that if we're called again
// we know to start afresh.
mComplete = true;
}
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.
//
}
*outTokenLen = output_token.length;
if (output_token.length != 0)
*outToken = nsMemory::Clone(output_token.value, output_token.length);
else
*outToken = nullptr;
gss_release_buffer_ptr(&minor_status, &output_token);
if (major_status == GSS_S_COMPLETE)
rv = NS_SUCCESS_AUTH_FINISHED;
else
rv = NS_OK;
end:
gss_release_name_ptr(&minor_status, &server);
LOG((" leaving nsAuthGSSAPI::GetNextToken [rv=%x]", rv));
return rv;
}
NS_IMETHODIMP
nsAuthGSSAPI::Unwrap(const void *inToken,
uint32_t inTokenLen,
void **outToken,
uint32_t *outTokenLen)
{
OM_uint32 major_status, minor_status;
gss_buffer_desc input_token;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
input_token.value = (void *) inToken;
input_token.length = inTokenLen;
major_status = gss_unwrap_ptr(&minor_status,
mCtx,
&input_token,
&output_token,
nullptr,
nullptr);
if (GSS_ERROR(major_status)) {
LogGssError(major_status, minor_status, "gss_unwrap() failed");
Reset();
gss_release_buffer_ptr(&minor_status, &output_token);
return NS_ERROR_FAILURE;
}
*outTokenLen = output_token.length;
if (output_token.length)
*outToken = nsMemory::Clone(output_token.value, output_token.length);
else
*outToken = nullptr;
gss_release_buffer_ptr(&minor_status, &output_token);
return NS_OK;
}
NS_IMETHODIMP
nsAuthGSSAPI::Wrap(const void *inToken,
uint32_t inTokenLen,
bool confidential,
void **outToken,
uint32_t *outTokenLen)
{
OM_uint32 major_status, minor_status;
gss_buffer_desc input_token;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
input_token.value = (void *) inToken;
input_token.length = inTokenLen;
major_status = gss_wrap_ptr(&minor_status,
mCtx,
confidential,
GSS_C_QOP_DEFAULT,
&input_token,
nullptr,
&output_token);
if (GSS_ERROR(major_status)) {
LogGssError(major_status, minor_status, "gss_wrap() failed");
Reset();
gss_release_buffer_ptr(&minor_status, &output_token);
return NS_ERROR_FAILURE;
}
*outTokenLen = output_token.length;
/* it is not possible for output_token.length to be zero */
*outToken = nsMemory::Clone(output_token.value, output_token.length);
gss_release_buffer_ptr(&minor_status, &output_token);
return NS_OK;
}
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