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/* vim:set ts=4 sw=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/. */
#include "nsComponentManagerUtils.h"
#include "nsNativeCharsetUtils.h"
#include "nsIServiceManager.h"
#include "nsIPrefService.h"
#include "nsAuthSASL.h"
static const char kNegotiateAuthSSPI[] = "network.auth.use-sspi";
nsAuthSASL::nsAuthSASL()
{
mSASLReady = false;
}
void nsAuthSASL::Reset()
{
mSASLReady = false;
}
/* Limitations apply to this class's thread safety. See the header file */
NS_IMPL_ISUPPORTS(nsAuthSASL, nsIAuthModule)
NS_IMETHODIMP
nsAuthSASL::Init(const char *serviceName,
uint32_t serviceFlags,
const char16_t *domain,
const char16_t *username,
const char16_t *password)
{
nsresult rv;
NS_ASSERTION(username, "SASL requires a username");
NS_ASSERTION(!domain && !password, "unexpected credentials");
mUsername = username;
// If we're doing SASL, we should do mutual auth
serviceFlags |= REQ_MUTUAL_AUTH;
// Find out whether we should be trying SSPI or not
const char *contractID = NS_AUTH_MODULE_CONTRACTID_PREFIX "kerb-gss";
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
bool val;
rv = prefs->GetBoolPref(kNegotiateAuthSSPI, &val);
if (NS_SUCCEEDED(rv) && val)
contractID = NS_AUTH_MODULE_CONTRACTID_PREFIX "kerb-sspi";
}
mInnerModule = do_CreateInstance(contractID, &rv);
// if we can't create the GSSAPI module, then bail
NS_ENSURE_SUCCESS(rv, rv);
mInnerModule->Init(serviceName, serviceFlags, nullptr, nullptr, nullptr);
return NS_OK;
}
NS_IMETHODIMP
nsAuthSASL::GetNextToken(const void *inToken,
uint32_t inTokenLen,
void **outToken,
uint32_t *outTokenLen)
{
nsresult rv;
void *unwrappedToken;
char *message;
uint32_t unwrappedTokenLen, messageLen;
nsAutoCString userbuf;
if (!mInnerModule)
return NS_ERROR_NOT_INITIALIZED;
if (mSASLReady) {
// If the server COMPLETEs with an empty token, Cyrus sends us that token.
// I don't think this is correct, but we need to handle that behaviour.
// Cyrus ignores the contents of our reply token.
if (inTokenLen == 0) {
*outToken = nullptr;
*outTokenLen = 0;
return NS_OK;
}
// We've completed the GSSAPI portion of the handshake, and are
// now ready to do the SASL security layer and authzid negotiation
// Input packet from the server needs to be unwrapped.
rv = mInnerModule->Unwrap(inToken, inTokenLen, &unwrappedToken,
&unwrappedTokenLen);
if (NS_FAILED(rv)) {
Reset();
return rv;
}
// If we were doing security layers then we'd care what the
// server had sent us. We're not, so all we had to do was make
// sure that the signature was correct with the above unwrap()
free(unwrappedToken);
NS_CopyUnicodeToNative(mUsername, userbuf);
messageLen = userbuf.Length() + 4 + 1;
message = (char *)moz_xmalloc(messageLen);
if (!message) {
Reset();
return NS_ERROR_OUT_OF_MEMORY;
}
message[0] = 0x01; // No security layer
message[1] = 0x00;
message[2] = 0x00;
message[3] = 0x00; // Maxbuf must be zero if we've got no sec layer
strcpy(message+4, userbuf.get());
// Userbuf should not be nullptr terminated, so trim the trailing nullptr
// when wrapping the message
rv = mInnerModule->Wrap((void *) message, messageLen-1, false,
outToken, outTokenLen);
free(message);
Reset(); // All done
return NS_SUCCEEDED(rv) ? NS_SUCCESS_AUTH_FINISHED : rv;
}
rv = mInnerModule->GetNextToken(inToken, inTokenLen, outToken,
outTokenLen);
if (rv == NS_SUCCESS_AUTH_FINISHED) {
mSASLReady = true;
rv = NS_OK;
}
return rv;
}
NS_IMETHODIMP
nsAuthSASL::Unwrap(const void *inToken,
uint32_t inTokenLen,
void **outToken,
uint32_t *outTokenLen)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsAuthSASL::Wrap(const void *inToken,
uint32_t inTokenLen,
bool confidential,
void **outToken,
uint32_t *outTokenLen)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
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