/** * FreeRDP: A Remote Desktop Protocol Implementation * NTLM over HTTP * * Copyright 2012 Fujitsu Technology Solutions GmbH * Copyright 2012 Dmitrij Jasnov * Copyright 2012 Marc-Andre Moreau * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include "http.h" #include "ntlm.h" #define TAG FREERDP_TAG("core.gateway.ntlm") BOOL ntlm_client_init(rdpNtlm* ntlm, BOOL http, char* user, char* domain, char* password, SecPkgContext_Bindings* Bindings) { SECURITY_STATUS status; ntlm->http = http; ntlm->Bindings = Bindings; ntlm->table = InitSecurityInterfaceEx(SSPI_INTERFACE_WINPR); if (!ntlm->table) return FALSE; sspi_SetAuthIdentity(&(ntlm->identity), user, domain, password); status = ntlm->table->QuerySecurityPackageInfo(NTLMSP_NAME, &ntlm->pPackageInfo); if (status != SEC_E_OK) { WLog_ERR(TAG, "QuerySecurityPackageInfo status: 0x%08X", status); return FALSE; } ntlm->cbMaxToken = ntlm->pPackageInfo->cbMaxToken; status = ntlm->table->AcquireCredentialsHandle(NULL, NTLMSP_NAME, SECPKG_CRED_OUTBOUND, NULL, &ntlm->identity, NULL, NULL, &ntlm->credentials, &ntlm->expiration); if (status != SEC_E_OK) { WLog_ERR(TAG, "AcquireCredentialsHandle status: 0x%08X", status); return FALSE; } ntlm->haveContext = FALSE; ntlm->haveInputBuffer = FALSE; ZeroMemory(&ntlm->inputBuffer, sizeof(SecBuffer)); ZeroMemory(&ntlm->outputBuffer, sizeof(SecBuffer)); ZeroMemory(&ntlm->ContextSizes, sizeof(SecPkgContext_Sizes)); ntlm->fContextReq = 0; if (ntlm->http) { /* flags for HTTP authentication */ ntlm->fContextReq |= ISC_REQ_CONFIDENTIALITY; } else { /** * flags for RPC authentication: * RPC_C_AUTHN_LEVEL_PKT_INTEGRITY: * ISC_REQ_USE_DCE_STYLE | ISC_REQ_DELEGATE | ISC_REQ_MUTUAL_AUTH | * ISC_REQ_REPLAY_DETECT | ISC_REQ_SEQUENCE_DETECT */ ntlm->fContextReq |= ISC_REQ_USE_DCE_STYLE; ntlm->fContextReq |= ISC_REQ_DELEGATE | ISC_REQ_MUTUAL_AUTH; ntlm->fContextReq |= ISC_REQ_REPLAY_DETECT | ISC_REQ_SEQUENCE_DETECT; } return TRUE; } BOOL ntlm_client_make_spn(rdpNtlm* ntlm, LPCTSTR ServiceClass, char* hostname) { DWORD SpnLength = 0; LPTSTR hostnameX = NULL; #ifdef UNICODE ConvertToUnicode(CP_UTF8, 0, hostname, -1, (LPWSTR*) &hostnameX, 0); #else hostnameX = _strdup(hostname); #endif if (!hostnameX) return FALSE; if (!ServiceClass) { ntlm->ServicePrincipalName = (LPTSTR) _tcsdup(hostnameX); free(hostnameX); if (!ntlm->ServicePrincipalName) return FALSE; return TRUE; } if (DsMakeSpn(ServiceClass, hostnameX, NULL, 0, NULL, &SpnLength, NULL) != ERROR_BUFFER_OVERFLOW) return FALSE; ntlm->ServicePrincipalName = (LPTSTR) malloc(SpnLength * sizeof(TCHAR)); if (!ntlm->ServicePrincipalName) return FALSE; if (DsMakeSpn(ServiceClass, hostnameX, NULL, 0, NULL, &SpnLength, ntlm->ServicePrincipalName) != ERROR_SUCCESS) return FALSE; free(hostnameX); return TRUE; } /** * SSPI Client Ceremony * * -------------- * ( Client Begin ) * -------------- * | * | * \|/ * -----------+-------------- * | AcquireCredentialsHandle | * -------------------------- * | * | * \|/ * -------------+-------------- * +---------------> / InitializeSecurityContext / * | ---------------------------- * | | * | | * | \|/ * --------------------------- ---------+------------- ---------------------- * / Receive blob from server / < Received security blob? > --Yes-> / Send blob to server / * -------------+------------- ----------------------- ---------------------- * /|\ | | * | No | * Yes \|/ | * | ------------+----------- | * +---------------- < Received Continue Needed > <-----------------+ * ------------------------ * | * No * \|/ * ------+------- * ( Client End ) * -------------- */ BOOL ntlm_authenticate(rdpNtlm* ntlm) { SECURITY_STATUS status; if (ntlm->outputBuffer[0].pvBuffer) { free(ntlm->outputBuffer[0].pvBuffer); ntlm->outputBuffer[0].pvBuffer = NULL; } ntlm->outputBufferDesc.ulVersion = SECBUFFER_VERSION; ntlm->outputBufferDesc.cBuffers = 1; ntlm->outputBufferDesc.pBuffers = ntlm->outputBuffer; ntlm->outputBuffer[0].BufferType = SECBUFFER_TOKEN; ntlm->outputBuffer[0].cbBuffer = ntlm->cbMaxToken; ntlm->outputBuffer[0].pvBuffer = malloc(ntlm->outputBuffer[0].cbBuffer); if (!ntlm->outputBuffer[0].pvBuffer) return FALSE; if (ntlm->haveInputBuffer) { ntlm->inputBufferDesc.ulVersion = SECBUFFER_VERSION; ntlm->inputBufferDesc.cBuffers = 1; ntlm->inputBufferDesc.pBuffers = ntlm->inputBuffer; ntlm->inputBuffer[0].BufferType = SECBUFFER_TOKEN; if (ntlm->Bindings) { ntlm->inputBufferDesc.cBuffers++; ntlm->inputBuffer[1].BufferType = SECBUFFER_CHANNEL_BINDINGS; ntlm->inputBuffer[1].cbBuffer = ntlm->Bindings->BindingsLength; ntlm->inputBuffer[1].pvBuffer = (void*) ntlm->Bindings->Bindings; } } if ((!ntlm) || (!ntlm->table)) { WLog_ERR(TAG, "ntlm_authenticate: invalid ntlm context"); return FALSE; } status = ntlm->table->InitializeSecurityContext(&ntlm->credentials, (ntlm->haveContext) ? &ntlm->context : NULL, (ntlm->ServicePrincipalName) ? ntlm->ServicePrincipalName : NULL, ntlm->fContextReq, 0, SECURITY_NATIVE_DREP, (ntlm->haveInputBuffer) ? &ntlm->inputBufferDesc : NULL, 0, &ntlm->context, &ntlm->outputBufferDesc, &ntlm->pfContextAttr, &ntlm->expiration); if ((status == SEC_I_COMPLETE_AND_CONTINUE) || (status == SEC_I_COMPLETE_NEEDED) || (status == SEC_E_OK)) { if (ntlm->table->CompleteAuthToken) ntlm->table->CompleteAuthToken(&ntlm->context, &ntlm->outputBufferDesc); if (ntlm->table->QueryContextAttributes(&ntlm->context, SECPKG_ATTR_SIZES, &ntlm->ContextSizes) != SEC_E_OK) { WLog_ERR(TAG, "QueryContextAttributes SECPKG_ATTR_SIZES failure"); return FALSE; } if (status == SEC_I_COMPLETE_NEEDED) status = SEC_E_OK; else if (status == SEC_I_COMPLETE_AND_CONTINUE) status = SEC_I_CONTINUE_NEEDED; } if (ntlm->haveInputBuffer) { free(ntlm->inputBuffer[0].pvBuffer); ntlm->inputBuffer[0].pvBuffer = NULL; } ntlm->haveInputBuffer = TRUE; ntlm->haveContext = TRUE; return (status == SEC_I_CONTINUE_NEEDED) ? TRUE : FALSE; } void ntlm_client_uninit(rdpNtlm* ntlm) { free(ntlm->identity.User); ntlm->identity.User = NULL; free(ntlm->identity.Domain); ntlm->identity.Domain = NULL; free(ntlm->identity.Password); ntlm->identity.Password = NULL; free(ntlm->ServicePrincipalName); ntlm->ServicePrincipalName = NULL; if (ntlm->table) { ntlm->table->FreeCredentialsHandle(&ntlm->credentials); ntlm->table->FreeContextBuffer(ntlm->pPackageInfo); ntlm->table->DeleteSecurityContext(&ntlm->context); ntlm->table = NULL; } } rdpNtlm* ntlm_new() { rdpNtlm* ntlm; ntlm = (rdpNtlm*) calloc(1, sizeof(rdpNtlm)); return ntlm; } void ntlm_free(rdpNtlm* ntlm) { if (!ntlm) return; if (ntlm->outputBuffer[0].pvBuffer) { free(ntlm->outputBuffer[0].pvBuffer); ntlm->outputBuffer[0].pvBuffer = NULL; } ntlm_client_uninit(ntlm); free(ntlm); }