/*
* Processes received authentication tokens as well as supplies the
* response token.
*/
int ne_sspi_authenticate(void *context, const char *base64Token, char **responseToken)
{
SecBufferDesc outBufferDesc;
SecBuffer outBuffer;
int status;
SECURITY_STATUS securityStatus;
ULONG contextFlags;
SSPIContext *sspiContext;
if (initialized <= 0) {
return -1;
}
status = getContext(context, &sspiContext);
if (status) {
return status;
}
/* TODO: Not sure what flags should be set. joe: this needs to be
* driven by the ne_auth interface; the GSSAPI code needs similar
* flags. */
contextFlags = ISC_REQ_CONFIDENTIALITY | ISC_REQ_MUTUAL_AUTH;
initSingleEmptyBuffer(&outBufferDesc, &outBuffer);
status = makeBuffer(&outBufferDesc, sspiContext->maxTokenSize);
if (status) {
return status;
}
if (base64Token) {
SecBufferDesc inBufferDesc;
SecBuffer inBuffer;
if (!sspiContext->continueNeeded) {
freeBuffer(&outBufferDesc);
NE_DEBUG(NE_DBG_HTTPAUTH, "sspi: Got an unexpected token.\n");
return -1;
}
initSingleEmptyBuffer(&inBufferDesc, &inBuffer);
status = base64ToBuffer(base64Token, &inBufferDesc);
if (status) {
freeBuffer(&outBufferDesc);
return status;
}
securityStatus =
initializeSecurityContext(&sspiContext->credentials,
&(sspiContext->context),
sspiContext->serverName, contextFlags,
&inBufferDesc, &(sspiContext->context),
&outBufferDesc);
if (securityStatus == SEC_E_OK)
{
sspiContext->authfinished = 1;
}
freeBuffer(&inBufferDesc);
} else {
if (sspiContext->continueNeeded) {
freeBuffer(&outBufferDesc);
NE_DEBUG(NE_DBG_HTTPAUTH, "sspi: Expected a token from server.\n");
return -1;
}
if (sspiContext->authfinished && (sspiContext->credentials.dwLower || sspiContext->credentials.dwUpper)) {
if (sspiContext->authfinished)
{
freeBuffer(&outBufferDesc);
sspiContext->authfinished = 0;
NE_DEBUG(NE_DBG_HTTPAUTH,"sspi: failing because starting over from failed try.\n");
return -1;
}
sspiContext->authfinished = 0;
}
/* Reset any existing context since we are starting over */
resetContext(sspiContext);
if (acquireCredentialsHandle
(&sspiContext->credentials, sspiContext->mechanism) != SEC_E_OK) {
freeBuffer(&outBufferDesc);
NE_DEBUG(NE_DBG_HTTPAUTH,
"sspi: acquireCredentialsHandle failed.\n");
return -1;
}
securityStatus =
initializeSecurityContext(&sspiContext->credentials, NULL,
sspiContext->serverName, contextFlags,
NULL, &(sspiContext->context),
&outBufferDesc);
}
if (securityStatus == SEC_I_COMPLETE_AND_CONTINUE
|| securityStatus == SEC_I_COMPLETE_NEEDED) {
SECURITY_STATUS compleStatus =
pSFT->CompleteAuthToken(&(sspiContext->context), &outBufferDesc);
if (compleStatus != SEC_E_OK) {
freeBuffer(&outBufferDesc);
NE_DEBUG(NE_DBG_HTTPAUTH, "sspi: CompleteAuthToken failed.\n");
return -1;
}
}
if (securityStatus == SEC_I_COMPLETE_AND_CONTINUE
|| securityStatus == SEC_I_CONTINUE_NEEDED) {
sspiContext->continueNeeded = 1;
} else {
sspiContext->continueNeeded = 0;
}
if (!(securityStatus == SEC_I_COMPLETE_AND_CONTINUE
|| securityStatus == SEC_I_COMPLETE_NEEDED
|| securityStatus == SEC_I_CONTINUE_NEEDED
|| securityStatus == SEC_E_OK)) {
NE_DEBUG(NE_DBG_HTTPAUTH,
"sspi: initializeSecurityContext [failed] [%x].\n",
securityStatus);
freeBuffer(&outBufferDesc);
return -1;
}
*responseToken = ne_base64(outBufferDesc.pBuffers->pvBuffer,
outBufferDesc.pBuffers->cbBuffer);
freeBuffer(&outBufferDesc);
return 0;
}
char* NtlmCreateResponseFromChallenge(HANDLE hSecurity, const char *szChallenge, const TCHAR* login, const TCHAR* psw,
bool http, unsigned& complete)
{
SECURITY_STATUS sc;
SecBufferDesc outputBufferDescriptor,inputBufferDescriptor;
SecBuffer outputSecurityToken,inputSecurityToken;
TimeStamp tokenExpiration;
ULONG contextAttributes;
NETLIBBASE64 nlb64 = { 0 };
NtlmHandleType* hNtlm = (NtlmHandleType*)hSecurity;
if (hSecurity == NULL || ntlmCnt == 0) return NULL;
if (_tcsicmp(hNtlm->szProvider, _T("Basic")))
{
bool isGSSAPI = _tcsicmp(hNtlm->szProvider, _T("GSSAPI")) == 0;
TCHAR *szProvider = isGSSAPI ? _T("Kerberos") : hNtlm->szProvider;
bool hasChallenge = szChallenge != NULL && szChallenge[0] != '\0';
if (hasChallenge)
{
nlb64.cchEncoded = lstrlenA(szChallenge);
nlb64.pszEncoded = (char*)szChallenge;
nlb64.cbDecoded = Netlib_GetBase64DecodedBufferSize(nlb64.cchEncoded);
nlb64.pbDecoded = (PBYTE)alloca(nlb64.cbDecoded);
if (!NetlibBase64Decode(0, (LPARAM)&nlb64)) return NULL;
if (isGSSAPI && complete)
return CompleteGssapi(hSecurity, nlb64.pbDecoded, nlb64.cbDecoded);
inputBufferDescriptor.cBuffers = 1;
inputBufferDescriptor.pBuffers = &inputSecurityToken;
inputBufferDescriptor.ulVersion = SECBUFFER_VERSION;
inputSecurityToken.BufferType = SECBUFFER_TOKEN;
inputSecurityToken.cbBuffer = nlb64.cbDecoded;
inputSecurityToken.pvBuffer = nlb64.pbDecoded;
// try to decode the domain name from the NTLM challenge
if (login != NULL && login[0] != '\0' && !hNtlm->hasDomain)
{
NtlmType2packet* pkt = ( NtlmType2packet* )nlb64.pbDecoded;
if (!strncmp(pkt->sign, "NTLMSSP", 8) && pkt->type == 2)
{
#ifdef UNICODE
wchar_t* domainName = (wchar_t*)&nlb64.pbDecoded[pkt->targetName.offset];
int domainLen = pkt->targetName.len;
// Negotiate ANSI? if yes, convert the ANSI name to unicode
if ((pkt->flags & 1) == 0)
{
int bufsz = MultiByteToWideChar(CP_ACP, 0, (char*)domainName, domainLen, NULL, 0);
wchar_t* buf = (wchar_t*)alloca(bufsz * sizeof(wchar_t));
domainLen = MultiByteToWideChar(CP_ACP, 0, (char*)domainName, domainLen, buf, bufsz) - 1;
domainName = buf;
}
else
domainLen /= sizeof(wchar_t);
#else
char* domainName = (char*)&nlb64.pbDecoded[pkt->targetName.offset];
int domainLen = pkt->targetName.len;
// Negotiate Unicode? if yes, convert the unicode name to ANSI
if (pkt->flags & 1)
{
int bufsz = WideCharToMultiByte(CP_ACP, 0, (WCHAR*)domainName, domainLen, NULL, 0, NULL, NULL);
char* buf = (char*)alloca(bufsz);
domainLen = WideCharToMultiByte(CP_ACP, 0, (WCHAR*)domainName, domainLen, buf, bufsz, NULL, NULL) - 1;
domainName = buf;
}
#endif
if (domainLen)
{
size_t newLoginLen = _tcslen(login) + domainLen + 1;
TCHAR *newLogin = (TCHAR*)alloca(newLoginLen * sizeof(TCHAR));
_tcsncpy(newLogin, domainName, domainLen);
newLogin[domainLen] = '\\';
_tcscpy(newLogin + domainLen + 1, login);
char* szChl = NtlmCreateResponseFromChallenge(hSecurity, NULL, newLogin, psw, http, complete);
mir_free(szChl);
}
}
}
}
else
{
if (SecIsValidHandle(&hNtlm->hClientContext)) g_pSSPI->DeleteSecurityContext(&hNtlm->hClientContext);
if (SecIsValidHandle(&hNtlm->hClientCredential)) g_pSSPI->FreeCredentialsHandle(&hNtlm->hClientCredential);
SEC_WINNT_AUTH_IDENTITY auth;
if (login != NULL && login[0] != '\0')
{
memset(&auth, 0, sizeof(auth));
#ifdef _UNICODE
NetlibLogf(NULL, "Security login requested, user: %S pssw: %s", login, psw ? "(exist)" : "(no psw)");
#else
NetlibLogf(NULL, "Security login requested, user: %s pssw: %s", login, psw ? "(exist)" : "(no psw)");
#endif
const TCHAR* loginName = login;
const TCHAR* domainName = _tcschr(login, '\\');
int domainLen = 0;
int loginLen = lstrlen(loginName);
if (domainName != NULL)
{
loginName = domainName + 1;
loginLen = lstrlen(loginName);
domainLen = domainName - login;
domainName = login;
}
else if ((domainName = _tcschr(login, '@')) != NULL)
{
loginName = login;
loginLen = domainName - login;
domainLen = lstrlen(++domainName);
}
#ifdef UNICODE
auth.User = (PWORD)loginName;
auth.UserLength = loginLen;
auth.Password = (PWORD)psw;
auth.PasswordLength = lstrlen(psw);
auth.Domain = (PWORD)domainName;
auth.DomainLength = domainLen;
auth.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
#else
auth.User = (PBYTE)loginName;
auth.UserLength = loginLen;
auth.Password = (PBYTE)psw;
auth.PasswordLength = lstrlen(psw);
auth.Domain = (PBYTE)domainName;
auth.DomainLength = domainLen;
auth.Flags = SEC_WINNT_AUTH_IDENTITY_ANSI;
#endif
hNtlm->hasDomain = domainLen != 0;
}
sc = g_pSSPI->AcquireCredentialsHandle(NULL, szProvider,
SECPKG_CRED_OUTBOUND, NULL, hNtlm->hasDomain ? &auth : NULL, NULL, NULL,
&hNtlm->hClientCredential, &tokenExpiration);
if (sc != SEC_E_OK)
{
ReportSecError(sc, __LINE__);
return NULL;
}
}
outputBufferDescriptor.cBuffers = 1;
outputBufferDescriptor.pBuffers = &outputSecurityToken;
outputBufferDescriptor.ulVersion = SECBUFFER_VERSION;
outputSecurityToken.BufferType = SECBUFFER_TOKEN;
outputSecurityToken.cbBuffer = hNtlm->cbMaxToken;
outputSecurityToken.pvBuffer = alloca(outputSecurityToken.cbBuffer);
sc = g_pSSPI->InitializeSecurityContext(&hNtlm->hClientCredential,
hasChallenge ? &hNtlm->hClientContext : NULL,
hNtlm->szPrincipal, isGSSAPI ? ISC_REQ_MUTUAL_AUTH | ISC_REQ_STREAM : 0, 0, SECURITY_NATIVE_DREP,
hasChallenge ? &inputBufferDescriptor : NULL, 0, &hNtlm->hClientContext,
&outputBufferDescriptor, &contextAttributes, &tokenExpiration);
complete = (sc != SEC_I_COMPLETE_AND_CONTINUE && sc != SEC_I_CONTINUE_NEEDED);
if (sc == SEC_I_COMPLETE_NEEDED || sc == SEC_I_COMPLETE_AND_CONTINUE)
{
sc = g_pSSPI->CompleteAuthToken(&hNtlm->hClientContext, &outputBufferDescriptor);
}
if (sc != SEC_E_OK && sc != SEC_I_CONTINUE_NEEDED)
{
ReportSecError(sc, __LINE__);
return NULL;
}
nlb64.cbDecoded = outputSecurityToken.cbBuffer;
nlb64.pbDecoded = (PBYTE)outputSecurityToken.pvBuffer;
}
else
{
if (!login || !psw) return NULL;
char *szLogin = mir_t2a(login);
char *szPassw = mir_t2a(psw);
size_t authLen = strlen(szLogin) + strlen(szPassw) + 5;
char *szAuth = (char*)alloca(authLen);
nlb64.cbDecoded = mir_snprintf(szAuth, authLen,"%s:%s", szLogin, szPassw);
nlb64.pbDecoded=(PBYTE)szAuth;
complete = true;
mir_free(szPassw);
mir_free(szLogin);
}
nlb64.cchEncoded = Netlib_GetBase64EncodedBufferSize(nlb64.cbDecoded);
nlb64.pszEncoded = (char*)alloca(nlb64.cchEncoded);
if (!NetlibBase64Encode(0,(LPARAM)&nlb64)) return NULL;
char* result;
if (http)
{
char* szProvider = mir_t2a(hNtlm->szProvider);
nlb64.cchEncoded += (int)strlen(szProvider) + 10;
result = (char*)mir_alloc(nlb64.cchEncoded);
mir_snprintf(result, nlb64.cchEncoded, "%s %s", szProvider, nlb64.pszEncoded);
mir_free(szProvider);
}
else
result = mir_strdup(nlb64.pszEncoded);
return result;
}