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-rw-r--r--netwerk/protocol/http/nsHttpNTLMAuth.cpp404
1 files changed, 404 insertions, 0 deletions
diff --git a/netwerk/protocol/http/nsHttpNTLMAuth.cpp b/netwerk/protocol/http/nsHttpNTLMAuth.cpp
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+++ b/netwerk/protocol/http/nsHttpNTLMAuth.cpp
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+/* vim:set ts=4 sw=2 sts=2 et ci: */
+/* 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/. */
+
+// HttpLog.h should generally be included first
+#include "HttpLog.h"
+
+#include "nsHttpNTLMAuth.h"
+#include "nsIAuthModule.h"
+#include "nsCOMPtr.h"
+#include "nsServiceManagerUtils.h"
+#include "plbase64.h"
+#include "plstr.h"
+#include "prnetdb.h"
+
+//-----------------------------------------------------------------------------
+
+#include "nsIPrefBranch.h"
+#include "nsIHttpAuthenticableChannel.h"
+#include "nsIURI.h"
+#ifdef XP_WIN
+# include "nsIChannel.h"
+# include "nsIX509Cert.h"
+# include "nsITransportSecurityInfo.h"
+#endif
+#include "mozilla/Attributes.h"
+#include "mozilla/Base64.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Tokenizer.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Unused.h"
+#include "nsNetUtil.h"
+#include "nsIChannel.h"
+#include "nsUnicharUtils.h"
+#include "mozilla/net/HttpAuthUtils.h"
+#include "mozilla/ClearOnShutdown.h"
+
+namespace mozilla {
+namespace net {
+
+static const char kAllowProxies[] = "network.automatic-ntlm-auth.allow-proxies";
+static const char kAllowNonFqdn[] =
+ "network.automatic-ntlm-auth.allow-non-fqdn";
+static const char kTrustedURIs[] = "network.automatic-ntlm-auth.trusted-uris";
+static const char kForceGeneric[] = "network.auth.force-generic-ntlm";
+static const char kSSOinPBmode[] = "network.auth.private-browsing-sso";
+
+StaticRefPtr<nsHttpNTLMAuth> nsHttpNTLMAuth::gSingleton;
+
+static bool IsNonFqdn(nsIURI* uri) {
+ nsAutoCString host;
+ PRNetAddr addr;
+
+ if (NS_FAILED(uri->GetAsciiHost(host))) return false;
+
+ // return true if host does not contain a dot and is not an ip address
+ return !host.IsEmpty() && !host.Contains('.') &&
+ PR_StringToNetAddr(host.BeginReading(), &addr) != PR_SUCCESS;
+}
+
+// Check to see if we should use our generic (internal) NTLM auth module.
+static bool ForceGenericNTLM() {
+ nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
+ if (!prefs) return false;
+ bool flag = false;
+
+ if (NS_FAILED(prefs->GetBoolPref(kForceGeneric, &flag))) flag = false;
+
+ LOG(("Force use of generic ntlm auth module: %d\n", flag));
+ return flag;
+}
+
+// Check to see if we should use default credentials for this host or proxy.
+static bool CanUseDefaultCredentials(nsIHttpAuthenticableChannel* channel,
+ bool isProxyAuth) {
+ nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
+ if (!prefs) {
+ return false;
+ }
+
+ // Proxy should go all the time, it's not considered a privacy leak
+ // to send default credentials to a proxy.
+ if (isProxyAuth) {
+ bool val;
+ if (NS_FAILED(prefs->GetBoolPref(kAllowProxies, &val))) val = false;
+ LOG(("Default credentials allowed for proxy: %d\n", val));
+ return val;
+ }
+
+ // Prevent using default credentials for authentication when we are in the
+ // private browsing mode (but not in "never remember history" mode) and when
+ // not explicitely allowed. Otherwise, it would cause a privacy data leak.
+ nsCOMPtr<nsIChannel> bareChannel = do_QueryInterface(channel);
+ MOZ_ASSERT(bareChannel);
+
+ if (NS_UsePrivateBrowsing(bareChannel)) {
+ bool ssoInPb;
+ if (NS_SUCCEEDED(prefs->GetBoolPref(kSSOinPBmode, &ssoInPb)) && ssoInPb) {
+ return true;
+ }
+
+ bool dontRememberHistory;
+ if (NS_SUCCEEDED(prefs->GetBoolPref("browser.privatebrowsing.autostart",
+ &dontRememberHistory)) &&
+ !dontRememberHistory) {
+ return false;
+ }
+ }
+
+ nsCOMPtr<nsIURI> uri;
+ Unused << channel->GetURI(getter_AddRefs(uri));
+
+ bool allowNonFqdn;
+ if (NS_FAILED(prefs->GetBoolPref(kAllowNonFqdn, &allowNonFqdn)))
+ allowNonFqdn = false;
+ if (allowNonFqdn && uri && IsNonFqdn(uri)) {
+ LOG(("Host is non-fqdn, default credentials are allowed\n"));
+ return true;
+ }
+
+ bool isTrustedHost = (uri && auth::URIMatchesPrefPattern(uri, kTrustedURIs));
+ LOG(("Default credentials allowed for host: %d\n", isTrustedHost));
+ return isTrustedHost;
+}
+
+// Dummy class for session state object. This class doesn't hold any data.
+// Instead we use its existence as a flag. See ChallengeReceived.
+class nsNTLMSessionState final : public nsISupports {
+ ~nsNTLMSessionState() = default;
+
+ public:
+ NS_DECL_ISUPPORTS
+};
+NS_IMPL_ISUPPORTS0(nsNTLMSessionState)
+
+//-----------------------------------------------------------------------------
+
+already_AddRefed<nsIHttpAuthenticator> nsHttpNTLMAuth::GetOrCreate() {
+ nsCOMPtr<nsIHttpAuthenticator> authenticator;
+ if (gSingleton) {
+ authenticator = gSingleton;
+ } else {
+ gSingleton = new nsHttpNTLMAuth();
+ ClearOnShutdown(&gSingleton);
+ authenticator = gSingleton;
+ }
+
+ return authenticator.forget();
+}
+
+NS_IMPL_ISUPPORTS(nsHttpNTLMAuth, nsIHttpAuthenticator)
+
+NS_IMETHODIMP
+nsHttpNTLMAuth::ChallengeReceived(nsIHttpAuthenticableChannel* channel,
+ const char* challenge, bool isProxyAuth,
+ nsISupports** sessionState,
+ nsISupports** continuationState,
+ bool* identityInvalid) {
+ LOG(("nsHttpNTLMAuth::ChallengeReceived [ss=%p cs=%p]\n", *sessionState,
+ *continuationState));
+
+ // Use the native NTLM if available
+ mUseNative = true;
+
+ // NOTE: we don't define any session state, but we do use the pointer.
+
+ *identityInvalid = false;
+
+ // Start a new auth sequence if the challenge is exactly "NTLM".
+ // If native NTLM auth apis are available and enabled through prefs,
+ // try to use them.
+ if (PL_strcasecmp(challenge, "NTLM") == 0) {
+ nsCOMPtr<nsIAuthModule> module;
+
+ // Check to see if we should default to our generic NTLM auth module
+ // through UseGenericNTLM. (We use native auth by default if the
+ // system provides it.) If *sessionState is non-null, we failed to
+ // instantiate a native NTLM module the last time, so skip trying again.
+ bool forceGeneric = ForceGenericNTLM();
+ if (!forceGeneric && !*sessionState) {
+ // Check for approved default credentials hosts and proxies. If
+ // *continuationState is non-null, the last authentication attempt
+ // failed so skip default credential use.
+ if (!*continuationState &&
+ CanUseDefaultCredentials(channel, isProxyAuth)) {
+ // Try logging in with the user's default credentials. If
+ // successful, |identityInvalid| is false, which will trigger
+ // a default credentials attempt once we return.
+ module = nsIAuthModule::CreateInstance("sys-ntlm");
+ }
+#ifdef XP_WIN
+ else {
+ // Try to use native NTLM and prompt the user for their domain,
+ // username, and password. (only supported by windows nsAuthSSPI
+ // module.) Note, for servers that use LMv1 a weak hash of the user's
+ // password will be sent. We rely on windows internal apis to decide
+ // whether we should support this older, less secure version of the
+ // protocol.
+ module = nsIAuthModule::CreateInstance("sys-ntlm");
+ *identityInvalid = true;
+ }
+#endif // XP_WIN
+ if (!module) LOG(("Native sys-ntlm auth module not found.\n"));
+ }
+
+#ifdef XP_WIN
+ // On windows, never fall back unless the user has specifically requested
+ // so.
+ if (!forceGeneric && !module) return NS_ERROR_UNEXPECTED;
+#endif
+
+ // If no native support was available. Fall back on our internal NTLM
+ // implementation.
+ if (!module) {
+ if (!*sessionState) {
+ // Remember the fact that we cannot use the "sys-ntlm" module,
+ // so we don't ever bother trying again for this auth domain.
+ RefPtr<nsNTLMSessionState> state = new nsNTLMSessionState();
+ state.forget(sessionState);
+ }
+
+ // Use our internal NTLM implementation. Note, this is less secure,
+ // see bug 520607 for details.
+ LOG(("Trying to fall back on internal ntlm auth.\n"));
+ module = nsIAuthModule::CreateInstance("ntlm");
+
+ mUseNative = false;
+
+ // Prompt user for domain, username, and password.
+ *identityInvalid = true;
+ }
+
+ // If this fails, then it means that we cannot do NTLM auth.
+ if (!module) {
+ LOG(("No ntlm auth modules available.\n"));
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ // A non-null continuation state implies that we failed to authenticate.
+ // Blow away the old authentication state, and use the new one.
+ module.forget(continuationState);
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpNTLMAuth::GenerateCredentialsAsync(
+ nsIHttpAuthenticableChannel* authChannel,
+ nsIHttpAuthenticatorCallback* aCallback, const char* challenge,
+ bool isProxyAuth, const char16_t* domain, const char16_t* username,
+ const char16_t* password, nsISupports* sessionState,
+ nsISupports* continuationState, nsICancelable** aCancellable) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsHttpNTLMAuth::GenerateCredentials(nsIHttpAuthenticableChannel* authChannel,
+ const char* challenge, bool isProxyAuth,
+ const char16_t* domain,
+ const char16_t* user, const char16_t* pass,
+ nsISupports** sessionState,
+ nsISupports** continuationState,
+ uint32_t* aFlags, char** creds)
+
+{
+ LOG(("nsHttpNTLMAuth::GenerateCredentials\n"));
+
+ *creds = nullptr;
+ *aFlags = 0;
+
+ // if user or password is empty, ChallengeReceived returned
+ // identityInvalid = false, that means we are using default user
+ // credentials; see nsAuthSSPI::Init method for explanation of this
+ // condition
+ if (!user || !pass) *aFlags = USING_INTERNAL_IDENTITY;
+
+ nsresult rv;
+ nsCOMPtr<nsIAuthModule> module = do_QueryInterface(*continuationState, &rv);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ void *inBuf, *outBuf;
+ uint32_t inBufLen, outBufLen;
+ Maybe<nsTArray<uint8_t>> certArray;
+
+ // initial challenge
+ if (PL_strcasecmp(challenge, "NTLM") == 0) {
+ // NTLM service name format is 'HTTP@host' for both http and https
+ nsCOMPtr<nsIURI> uri;
+ rv = authChannel->GetURI(getter_AddRefs(uri));
+ if (NS_FAILED(rv)) return rv;
+ nsAutoCString serviceName, host;
+ rv = uri->GetAsciiHost(host);
+ if (NS_FAILED(rv)) return rv;
+ serviceName.AppendLiteral("HTTP@");
+ serviceName.Append(host);
+ // initialize auth module
+ uint32_t reqFlags = nsIAuthModule::REQ_DEFAULT;
+ if (isProxyAuth) reqFlags |= nsIAuthModule::REQ_PROXY_AUTH;
+
+ rv = module->Init(serviceName.get(), reqFlags, domain, user, pass);
+ if (NS_FAILED(rv)) return rv;
+
+// This update enables updated Windows machines (Win7 or patched previous
+// versions) and Linux machines running Samba (updated for Channel
+// Binding), to perform Channel Binding when authenticating using NTLMv2
+// and an outer secure channel.
+//
+// Currently only implemented for Windows, linux support will be landing in
+// a separate patch, update this #ifdef accordingly then.
+#if defined(XP_WIN) /* || defined (LINUX) */
+ // We should retrieve the server certificate and compute the CBT,
+ // but only when we are using the native NTLM implementation and
+ // not the internal one.
+ // It is a valid case not having the security info object. This
+ // occures when we connect an https site through an ntlm proxy.
+ // After the ssl tunnel has been created, we get here the second
+ // time and now generate the CBT from now valid security info.
+ nsCOMPtr<nsIChannel> channel = do_QueryInterface(authChannel, &rv);
+ if (NS_FAILED(rv)) return rv;
+
+ nsCOMPtr<nsISupports> security;
+ rv = channel->GetSecurityInfo(getter_AddRefs(security));
+ if (NS_FAILED(rv)) return rv;
+
+ nsCOMPtr<nsITransportSecurityInfo> secInfo = do_QueryInterface(security);
+
+ if (mUseNative && secInfo) {
+ nsCOMPtr<nsIX509Cert> cert;
+ rv = secInfo->GetServerCert(getter_AddRefs(cert));
+ if (NS_FAILED(rv)) return rv;
+
+ certArray.emplace();
+ rv = cert->GetRawDER(*certArray);
+ if (NS_FAILED(rv)) return rv;
+
+ // If there is a server certificate, we pass it along the
+ // first time we call GetNextToken().
+ inBufLen = certArray->Length();
+ inBuf = certArray->Elements();
+ } else {
+ // If there is no server certificate, we don't pass anything.
+ inBufLen = 0;
+ inBuf = nullptr;
+ }
+#else // Extended protection update is just for Linux and Windows machines.
+ inBufLen = 0;
+ inBuf = nullptr;
+#endif
+ } else {
+ // decode challenge; skip past "NTLM " to the start of the base64
+ // encoded data.
+ int len = strlen(challenge);
+ if (len < 6) return NS_ERROR_UNEXPECTED; // bogus challenge
+ challenge += 5;
+ len -= 5;
+
+ // strip off any padding (see bug 230351)
+ while (len && challenge[len - 1] == '=') len--;
+
+ // decode into the input secbuffer
+ rv = Base64Decode(challenge, len, (char**)&inBuf, &inBufLen);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+
+ rv = module->GetNextToken(inBuf, inBufLen, &outBuf, &outBufLen);
+ if (NS_SUCCEEDED(rv)) {
+ // base64 encode data in output buffer and prepend "NTLM "
+ CheckedUint32 credsLen = ((CheckedUint32(outBufLen) + 2) / 3) * 4;
+ credsLen += 5; // "NTLM "
+ credsLen += 1; // null terminate
+
+ if (!credsLen.isValid()) {
+ rv = NS_ERROR_FAILURE;
+ } else {
+ *creds = (char*)moz_xmalloc(credsLen.value());
+ memcpy(*creds, "NTLM ", 5);
+ PL_Base64Encode((char*)outBuf, outBufLen, *creds + 5);
+ (*creds)[credsLen.value() - 1] = '\0'; // null terminate
+ }
+
+ // OK, we are done with |outBuf|
+ free(outBuf);
+ }
+
+ // inBuf needs to be freed if it's not pointing into certArray
+ if (inBuf && !certArray) {
+ free(inBuf);
+ }
+
+ return rv;
+}
+
+NS_IMETHODIMP
+nsHttpNTLMAuth::GetAuthFlags(uint32_t* flags) {
+ *flags = CONNECTION_BASED | IDENTITY_INCLUDES_DOMAIN | IDENTITY_ENCRYPTED;
+ return NS_OK;
+}
+
+} // namespace net
+} // namespace mozilla
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