mirror of
https://github.com/mozilla/gecko-dev.git
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ab4e3a0d42
--HG-- extra : rebase_source : 7d2cc56b6553cd7a8d848d3c660f30735bd82eec
604 lines
19 KiB
C++
604 lines
19 KiB
C++
/* vim:set ts=4 sw=4 sts=4 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//
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// GSSAPI Authentication Support Module
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//
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// Described by IETF Internet draft: draft-brezak-kerberos-http-00.txt
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// (formerly draft-brezak-spnego-http-04.txt)
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//
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// Also described here:
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// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnsecure/html/http-sso-1.asp
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//
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//
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#include "mozilla/ArrayUtils.h"
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#include "prlink.h"
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#include "nsCOMPtr.h"
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#include "nsIPrefService.h"
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#include "nsIPrefBranch.h"
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#include "nsIServiceManager.h"
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#include "nsNativeCharsetUtils.h"
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#include "mozilla/Telemetry.h"
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#include "nsAuthGSSAPI.h"
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#ifdef XP_MACOSX
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#include <Kerberos/Kerberos.h>
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#endif
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#ifdef XP_MACOSX
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typedef KLStatus (*KLCacheHasValidTickets_type)(
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KLPrincipal,
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KLKerberosVersion,
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KLBoolean *,
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KLPrincipal *,
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char **);
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#endif
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#if defined(HAVE_RES_NINIT)
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#endif
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using namespace mozilla;
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//-----------------------------------------------------------------------------
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// We define GSS_C_NT_HOSTBASED_SERVICE explicitly since it may be referenced
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// by by a different name depending on the implementation of gss but always
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// has the same value
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static gss_OID_desc gss_c_nt_hostbased_service =
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{ 10, (void *) "\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04" };
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static const char kNegotiateAuthGssLib[] =
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"network.negotiate-auth.gsslib";
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static const char kNegotiateAuthNativeImp[] =
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"network.negotiate-auth.using-native-gsslib";
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static struct GSSFunction {
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const char *str;
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PRFuncPtr func;
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} gssFuncs[] = {
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{ "gss_display_status", nullptr },
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{ "gss_init_sec_context", nullptr },
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{ "gss_indicate_mechs", nullptr },
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{ "gss_release_oid_set", nullptr },
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{ "gss_delete_sec_context", nullptr },
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{ "gss_import_name", nullptr },
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{ "gss_release_buffer", nullptr },
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{ "gss_release_name", nullptr },
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{ "gss_wrap", nullptr },
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{ "gss_unwrap", nullptr }
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};
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static bool gssNativeImp = true;
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static PRLibrary* gssLibrary = nullptr;
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#define gss_display_status_ptr ((gss_display_status_type)*gssFuncs[0].func)
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#define gss_init_sec_context_ptr ((gss_init_sec_context_type)*gssFuncs[1].func)
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#define gss_indicate_mechs_ptr ((gss_indicate_mechs_type)*gssFuncs[2].func)
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#define gss_release_oid_set_ptr ((gss_release_oid_set_type)*gssFuncs[3].func)
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#define gss_delete_sec_context_ptr ((gss_delete_sec_context_type)*gssFuncs[4].func)
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#define gss_import_name_ptr ((gss_import_name_type)*gssFuncs[5].func)
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#define gss_release_buffer_ptr ((gss_release_buffer_type)*gssFuncs[6].func)
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#define gss_release_name_ptr ((gss_release_name_type)*gssFuncs[7].func)
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#define gss_wrap_ptr ((gss_wrap_type)*gssFuncs[8].func)
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#define gss_unwrap_ptr ((gss_unwrap_type)*gssFuncs[9].func)
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#ifdef XP_MACOSX
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static PRFuncPtr KLCacheHasValidTicketsPtr;
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#define KLCacheHasValidTickets_ptr \
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((KLCacheHasValidTickets_type)*KLCacheHasValidTicketsPtr)
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#endif
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static nsresult
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gssInit()
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{
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nsXPIDLCString libPath;
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nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
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if (prefs) {
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prefs->GetCharPref(kNegotiateAuthGssLib, getter_Copies(libPath));
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prefs->GetBoolPref(kNegotiateAuthNativeImp, &gssNativeImp);
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}
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PRLibrary *lib = nullptr;
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if (!libPath.IsEmpty()) {
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LOG(("Attempting to load user specified library [%s]\n", libPath.get()));
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gssNativeImp = false;
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lib = PR_LoadLibrary(libPath.get());
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}
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else {
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#ifdef XP_WIN
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char *libName = PR_GetLibraryName(nullptr, "gssapi32");
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if (libName) {
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lib = PR_LoadLibrary("gssapi32");
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PR_FreeLibraryName(libName);
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}
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#elif defined(__OpenBSD__)
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/* OpenBSD doesn't register inter-library dependencies in basesystem
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* libs therefor we need to load all the libraries gssapi depends on,
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* in the correct order and with LD_GLOBAL for GSSAPI auth to work
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* fine.
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*/
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const char *const verLibNames[] = {
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"libasn1.so",
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"libcrypto.so",
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"libroken.so",
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"libheimbase.so",
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"libcom_err.so",
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"libkrb5.so",
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"libgssapi.so"
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};
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PRLibSpec libSpec;
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for (size_t i = 0; i < ArrayLength(verLibNames); ++i) {
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libSpec.type = PR_LibSpec_Pathname;
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libSpec.value.pathname = verLibNames[i];
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lib = PR_LoadLibraryWithFlags(libSpec, PR_LD_GLOBAL);
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}
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#else
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const char *const libNames[] = {
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"gss",
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"gssapi_krb5",
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"gssapi"
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};
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const char *const verLibNames[] = {
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"libgssapi_krb5.so.2", /* MIT - FC, Suse10, Debian */
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"libgssapi.so.4", /* Heimdal - Suse10, MDK */
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"libgssapi.so.1" /* Heimdal - Suse9, CITI - FC, MDK, Suse10*/
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};
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for (size_t i = 0; i < ArrayLength(verLibNames) && !lib; ++i) {
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lib = PR_LoadLibrary(verLibNames[i]);
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/* The CITI libgssapi library calls exit() during
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* initialization if it's not correctly configured. Try to
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* ensure that we never use this library for our GSSAPI
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* support, as its just a wrapper library, anyway.
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* See Bugzilla #325433
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*/
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if (lib &&
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PR_FindFunctionSymbol(lib,
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"internal_krb5_gss_initialize") &&
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PR_FindFunctionSymbol(lib, "gssd_pname_to_uid")) {
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LOG(("CITI libgssapi found, which calls exit(). Skipping\n"));
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PR_UnloadLibrary(lib);
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lib = nullptr;
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}
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}
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for (size_t i = 0; i < ArrayLength(libNames) && !lib; ++i) {
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char *libName = PR_GetLibraryName(nullptr, libNames[i]);
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if (libName) {
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lib = PR_LoadLibrary(libName);
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PR_FreeLibraryName(libName);
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if (lib &&
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PR_FindFunctionSymbol(lib,
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"internal_krb5_gss_initialize") &&
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PR_FindFunctionSymbol(lib, "gssd_pname_to_uid")) {
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LOG(("CITI libgssapi found, which calls exit(). Skipping\n"));
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PR_UnloadLibrary(lib);
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lib = nullptr;
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}
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}
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}
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#endif
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}
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if (!lib) {
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LOG(("Fail to load gssapi library\n"));
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return NS_ERROR_FAILURE;
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}
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LOG(("Attempting to load gss functions\n"));
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for (size_t i = 0; i < ArrayLength(gssFuncs); ++i) {
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gssFuncs[i].func = PR_FindFunctionSymbol(lib, gssFuncs[i].str);
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if (!gssFuncs[i].func) {
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LOG(("Fail to load %s function from gssapi library\n", gssFuncs[i].str));
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PR_UnloadLibrary(lib);
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return NS_ERROR_FAILURE;
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}
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}
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#ifdef XP_MACOSX
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if (gssNativeImp &&
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!(KLCacheHasValidTicketsPtr =
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PR_FindFunctionSymbol(lib, "KLCacheHasValidTickets"))) {
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LOG(("Fail to load KLCacheHasValidTickets function from gssapi library\n"));
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PR_UnloadLibrary(lib);
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return NS_ERROR_FAILURE;
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}
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#endif
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gssLibrary = lib;
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return NS_OK;
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}
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// Generate proper GSSAPI error messages from the major and
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// minor status codes.
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void
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LogGssError(OM_uint32 maj_stat, OM_uint32 min_stat, const char *prefix)
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{
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if (!MOZ_LOG_TEST(gNegotiateLog, LogLevel::Debug)) {
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return;
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}
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OM_uint32 new_stat;
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OM_uint32 msg_ctx = 0;
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gss_buffer_desc status1_string;
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gss_buffer_desc status2_string;
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OM_uint32 ret;
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nsAutoCString errorStr;
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errorStr.Assign(prefix);
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if (!gssLibrary)
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return;
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errorStr += ": ";
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do {
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ret = gss_display_status_ptr(&new_stat,
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maj_stat,
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GSS_C_GSS_CODE,
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GSS_C_NULL_OID,
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&msg_ctx,
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&status1_string);
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errorStr.Append((const char *) status1_string.value, status1_string.length);
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gss_release_buffer_ptr(&new_stat, &status1_string);
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errorStr += '\n';
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ret = gss_display_status_ptr(&new_stat,
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min_stat,
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GSS_C_MECH_CODE,
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GSS_C_NULL_OID,
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&msg_ctx,
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&status2_string);
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errorStr.Append((const char *) status2_string.value, status2_string.length);
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errorStr += '\n';
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} while (!GSS_ERROR(ret) && msg_ctx != 0);
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LOG(("%s\n", errorStr.get()));
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}
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//-----------------------------------------------------------------------------
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nsAuthGSSAPI::nsAuthGSSAPI(pType package)
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: mServiceFlags(REQ_DEFAULT)
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{
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OM_uint32 minstat;
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OM_uint32 majstat;
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gss_OID_set mech_set;
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gss_OID item;
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unsigned int i;
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static gss_OID_desc gss_krb5_mech_oid_desc =
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{ 9, (void *) "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02" };
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static gss_OID_desc gss_spnego_mech_oid_desc =
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{ 6, (void *) "\x2b\x06\x01\x05\x05\x02" };
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LOG(("entering nsAuthGSSAPI::nsAuthGSSAPI()\n"));
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mComplete = false;
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if (!gssLibrary && NS_FAILED(gssInit()))
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return;
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mCtx = GSS_C_NO_CONTEXT;
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mMechOID = &gss_krb5_mech_oid_desc;
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// if the type is kerberos we accept it as default
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// and exit
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if (package == PACKAGE_TYPE_KERBEROS)
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return;
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// Now, look at the list of supported mechanisms,
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// if SPNEGO is found, then use it.
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// Otherwise, set the desired mechanism to
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// GSS_C_NO_OID and let the system try to use
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// the default mechanism.
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//
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// Using Kerberos directly (instead of negotiating
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// with SPNEGO) may work in some cases depending
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// on how smart the server side is.
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majstat = gss_indicate_mechs_ptr(&minstat, &mech_set);
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if (GSS_ERROR(majstat))
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return;
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if (mech_set) {
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for (i=0; i<mech_set->count; i++) {
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item = &mech_set->elements[i];
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if (item->length == gss_spnego_mech_oid_desc.length &&
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!memcmp(item->elements, gss_spnego_mech_oid_desc.elements,
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item->length)) {
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// ok, we found it
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mMechOID = &gss_spnego_mech_oid_desc;
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break;
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}
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}
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gss_release_oid_set_ptr(&minstat, &mech_set);
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}
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}
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void
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nsAuthGSSAPI::Reset()
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{
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if (gssLibrary && mCtx != GSS_C_NO_CONTEXT) {
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OM_uint32 minor_status;
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gss_delete_sec_context_ptr(&minor_status, &mCtx, GSS_C_NO_BUFFER);
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}
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mCtx = GSS_C_NO_CONTEXT;
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mComplete = false;
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}
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/* static */ void
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nsAuthGSSAPI::Shutdown()
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{
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if (gssLibrary) {
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PR_UnloadLibrary(gssLibrary);
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gssLibrary = nullptr;
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}
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}
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/* Limitations apply to this class's thread safety. See the header file */
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NS_IMPL_ISUPPORTS(nsAuthGSSAPI, nsIAuthModule)
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NS_IMETHODIMP
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nsAuthGSSAPI::Init(const char *serviceName,
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uint32_t serviceFlags,
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const char16_t *domain,
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const char16_t *username,
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const char16_t *password)
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{
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// we don't expect to be passed any user credentials
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NS_ASSERTION(!domain && !username && !password, "unexpected credentials");
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// it's critial that the caller supply a service name to be used
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NS_ENSURE_TRUE(serviceName && *serviceName, NS_ERROR_INVALID_ARG);
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LOG(("entering nsAuthGSSAPI::Init()\n"));
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if (!gssLibrary)
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return NS_ERROR_NOT_INITIALIZED;
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mServiceName = serviceName;
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mServiceFlags = serviceFlags;
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static bool sTelemetrySent = false;
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if (!sTelemetrySent) {
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mozilla::Telemetry::Accumulate(
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mozilla::Telemetry::NTLM_MODULE_USED_2,
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serviceFlags & nsIAuthModule::REQ_PROXY_AUTH
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? NTLM_MODULE_KERBEROS_PROXY
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: NTLM_MODULE_KERBEROS_DIRECT);
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sTelemetrySent = true;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsAuthGSSAPI::GetNextToken(const void *inToken,
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uint32_t inTokenLen,
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void **outToken,
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uint32_t *outTokenLen)
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{
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OM_uint32 major_status, minor_status;
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OM_uint32 req_flags = 0;
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gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
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gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
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gss_buffer_t in_token_ptr = GSS_C_NO_BUFFER;
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gss_name_t server;
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nsAutoCString userbuf;
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nsresult rv;
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LOG(("entering nsAuthGSSAPI::GetNextToken()\n"));
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if (!gssLibrary)
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return NS_ERROR_NOT_INITIALIZED;
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// If they've called us again after we're complete, reset to start afresh.
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if (mComplete)
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Reset();
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if (mServiceFlags & REQ_DELEGATE)
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req_flags |= GSS_C_DELEG_FLAG;
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if (mServiceFlags & REQ_MUTUAL_AUTH)
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req_flags |= GSS_C_MUTUAL_FLAG;
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input_token.value = (void *)mServiceName.get();
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input_token.length = mServiceName.Length() + 1;
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#if defined(HAVE_RES_NINIT)
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res_ninit(&_res);
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#endif
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major_status = gss_import_name_ptr(&minor_status,
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&input_token,
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&gss_c_nt_hostbased_service,
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&server);
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input_token.value = nullptr;
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input_token.length = 0;
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if (GSS_ERROR(major_status)) {
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LogGssError(major_status, minor_status, "gss_import_name() failed");
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return NS_ERROR_FAILURE;
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}
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if (inToken) {
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input_token.length = inTokenLen;
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input_token.value = (void *) inToken;
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in_token_ptr = &input_token;
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}
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else if (mCtx != GSS_C_NO_CONTEXT) {
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// If there is no input token, then we are starting a new
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// authentication sequence. If we have already initialized our
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// security context, then we're in trouble because it means that the
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// first sequence failed. We need to bail or else we might end up in
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// an infinite loop.
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LOG(("Cannot restart authentication sequence!"));
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return NS_ERROR_UNEXPECTED;
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}
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#if defined(XP_MACOSX)
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// Suppress Kerberos prompts to get credentials. See bug 240643.
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// We can only use Mac OS X specific kerb functions if we are using
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// the native lib
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KLBoolean found;
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bool doingMailTask = mServiceName.Find("imap@") ||
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mServiceName.Find("pop@") ||
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mServiceName.Find("smtp@") ||
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mServiceName.Find("ldap@");
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if (!doingMailTask && (gssNativeImp &&
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(KLCacheHasValidTickets_ptr(nullptr, kerberosVersion_V5, &found, nullptr, nullptr) != klNoErr || !found)))
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{
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major_status = GSS_S_FAILURE;
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minor_status = 0;
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}
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else
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#endif /* XP_MACOSX */
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major_status = gss_init_sec_context_ptr(&minor_status,
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GSS_C_NO_CREDENTIAL,
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&mCtx,
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server,
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mMechOID,
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req_flags,
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GSS_C_INDEFINITE,
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GSS_C_NO_CHANNEL_BINDINGS,
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in_token_ptr,
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nullptr,
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&output_token,
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nullptr,
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nullptr);
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if (GSS_ERROR(major_status)) {
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LogGssError(major_status, minor_status, "gss_init_sec_context() failed");
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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;
|
|
}
|
|
|