679de71056
Fixes #10507: do not ask for password if PasswordHash is supplied on windows.
2110 lines
51 KiB
C
2110 lines
51 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Network Level Authentication (NLA)
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*
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* Copyright 2010-2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2015 Thincast Technologies GmbH
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* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
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* Copyright 2016 Martin Fleisz <martin.fleisz@thincast.com>
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* Copyright 2017 Dorian Ducournau <dorian.ducournau@gmail.com>
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* Copyright 2022 David Fort <contact@hardening-consulting.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <freerdp/config.h>
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#include "settings.h"
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#include <time.h>
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#include <ctype.h>
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#include <freerdp/log.h>
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#include <freerdp/build-config.h>
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#include <winpr/crt.h>
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#include <winpr/assert.h>
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#include <winpr/sam.h>
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#include <winpr/sspi.h>
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#include <winpr/print.h>
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#include <winpr/tchar.h>
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#include <winpr/ncrypt.h>
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#include <winpr/cred.h>
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#include <winpr/debug.h>
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#include <winpr/asn1.h>
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#include <winpr/secapi.h>
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#include "../crypto/tls.h"
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#include "nego.h"
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#include "rdp.h"
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#include "nla.h"
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#include "utils.h"
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#include "credssp_auth.h"
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#include <freerdp/utils/smartcardlogon.h>
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#define TAG FREERDP_TAG("core.nla")
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#define SERVER_KEY "Software\\" FREERDP_VENDOR_STRING "\\" FREERDP_PRODUCT_STRING "\\Server"
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#define NLA_AUTH_PKG NEGO_SSP_NAME
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typedef enum
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{
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AUTHZ_SUCCESS = 0x00000000,
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AUTHZ_ACCESS_DENIED = 0x00000005,
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} AUTHZ_RESULT;
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/**
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* TSRequest ::= SEQUENCE {
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* version [0] INTEGER,
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* negoTokens [1] NegoData OPTIONAL,
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* authInfo [2] OCTET STRING OPTIONAL,
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* pubKeyAuth [3] OCTET STRING OPTIONAL,
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* errorCode [4] INTEGER OPTIONAL
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* }
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*
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* NegoData ::= SEQUENCE OF NegoDataItem
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*
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* NegoDataItem ::= SEQUENCE {
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* negoToken [0] OCTET STRING
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* }
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*
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* TSCredentials ::= SEQUENCE {
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* credType [0] INTEGER,
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* credentials [1] OCTET STRING
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* }
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*
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* TSPasswordCreds ::= SEQUENCE {
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* domainName [0] OCTET STRING,
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* userName [1] OCTET STRING,
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* password [2] OCTET STRING
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* }
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*
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* TSSmartCardCreds ::= SEQUENCE {
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* pin [0] OCTET STRING,
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* cspData [1] TSCspDataDetail,
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* userHint [2] OCTET STRING OPTIONAL,
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* domainHint [3] OCTET STRING OPTIONAL
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* }
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*
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* TSCspDataDetail ::= SEQUENCE {
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* keySpec [0] INTEGER,
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* cardName [1] OCTET STRING OPTIONAL,
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* readerName [2] OCTET STRING OPTIONAL,
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* containerName [3] OCTET STRING OPTIONAL,
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* cspName [4] OCTET STRING OPTIONAL
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* }
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*
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*/
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#define NLA_PKG_NAME CREDSSP_AUTH_PKG_SPNEGO
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struct rdp_nla
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{
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BOOL server;
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NLA_STATE state;
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ULONG sendSeqNum;
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ULONG recvSeqNum;
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rdpContext* rdpcontext;
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rdpTransport* transport;
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UINT32 version;
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UINT32 peerVersion;
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UINT32 errorCode;
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/* Lifetime of buffer nla_new -> nla_free */
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SecBuffer ClientNonce; /* Depending on protocol version a random nonce or a value read from the
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server. */
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SecBuffer negoToken;
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SecBuffer pubKeyAuth;
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SecBuffer authInfo;
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SecBuffer PublicKey;
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SecBuffer tsCredentials;
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SEC_WINNT_AUTH_IDENTITY* identity;
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rdpCredsspAuth* auth;
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char* pkinitArgs;
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SmartcardCertInfo* smartcardCert;
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BYTE certSha1[20];
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BOOL earlyUserAuth;
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};
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static BOOL nla_send(rdpNla* nla);
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static int nla_server_recv(rdpNla* nla);
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static BOOL nla_encrypt_public_key_echo(rdpNla* nla);
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static BOOL nla_encrypt_public_key_hash(rdpNla* nla);
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static BOOL nla_decrypt_public_key_echo(rdpNla* nla);
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static BOOL nla_decrypt_public_key_hash(rdpNla* nla);
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static BOOL nla_encrypt_ts_credentials(rdpNla* nla);
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static BOOL nla_decrypt_ts_credentials(rdpNla* nla);
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void nla_set_early_user_auth(rdpNla* nla, BOOL earlyUserAuth)
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{
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WINPR_ASSERT(nla);
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WLog_DBG(TAG, "Early User Auth active: %s", earlyUserAuth ? "true" : "false");
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nla->earlyUserAuth = earlyUserAuth;
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}
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static void nla_buffer_free(rdpNla* nla)
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{
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WINPR_ASSERT(nla);
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sspi_SecBufferFree(&nla->pubKeyAuth);
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sspi_SecBufferFree(&nla->authInfo);
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sspi_SecBufferFree(&nla->negoToken);
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sspi_SecBufferFree(&nla->ClientNonce);
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sspi_SecBufferFree(&nla->PublicKey);
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}
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static BOOL nla_Digest_Update_From_SecBuffer(WINPR_DIGEST_CTX* ctx, const SecBuffer* buffer)
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{
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if (!buffer)
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return FALSE;
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return winpr_Digest_Update(ctx, buffer->pvBuffer, buffer->cbBuffer);
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}
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static BOOL nla_sec_buffer_alloc(SecBuffer* buffer, size_t size)
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{
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WINPR_ASSERT(buffer);
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sspi_SecBufferFree(buffer);
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if (size > ULONG_MAX)
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return FALSE;
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if (!sspi_SecBufferAlloc(buffer, (ULONG)size))
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return FALSE;
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WINPR_ASSERT(buffer);
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buffer->BufferType = SECBUFFER_TOKEN;
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return TRUE;
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}
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static BOOL nla_sec_buffer_alloc_from_data(SecBuffer* buffer, const BYTE* data, size_t offset,
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size_t size)
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{
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if (!nla_sec_buffer_alloc(buffer, offset + size))
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return FALSE;
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WINPR_ASSERT(buffer);
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BYTE* pb = buffer->pvBuffer;
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memcpy(&pb[offset], data, size);
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return TRUE;
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}
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/* CredSSP Client-To-Server Binding Hash\0 */
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static const BYTE ClientServerHashMagic[] = { 0x43, 0x72, 0x65, 0x64, 0x53, 0x53, 0x50, 0x20,
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0x43, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x2D, 0x54,
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0x6F, 0x2D, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72,
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0x20, 0x42, 0x69, 0x6E, 0x64, 0x69, 0x6E, 0x67,
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0x20, 0x48, 0x61, 0x73, 0x68, 0x00 };
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/* CredSSP Server-To-Client Binding Hash\0 */
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static const BYTE ServerClientHashMagic[] = { 0x43, 0x72, 0x65, 0x64, 0x53, 0x53, 0x50, 0x20,
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0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x2D, 0x54,
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0x6F, 0x2D, 0x43, 0x6C, 0x69, 0x65, 0x6E, 0x74,
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0x20, 0x42, 0x69, 0x6E, 0x64, 0x69, 0x6E, 0x67,
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0x20, 0x48, 0x61, 0x73, 0x68, 0x00 };
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static const UINT32 NonceLength = 32;
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static BOOL nla_adjust_settings_from_smartcard(rdpNla* nla)
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{
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BOOL ret = FALSE;
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WINPR_ASSERT(nla);
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WINPR_ASSERT(nla->rdpcontext);
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rdpSettings* settings = nla->rdpcontext->settings;
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WINPR_ASSERT(settings);
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if (!settings->SmartcardLogon)
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return TRUE;
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smartcardCertInfo_Free(nla->smartcardCert);
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if (!smartcard_getCert(nla->rdpcontext, &nla->smartcardCert, FALSE))
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{
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WLog_ERR(TAG, "unable to get smartcard certificate for logon");
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return FALSE;
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}
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if (!settings->CspName)
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{
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if (nla->smartcardCert->csp && !freerdp_settings_set_string_from_utf16(
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settings, FreeRDP_CspName, nla->smartcardCert->csp))
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{
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WLog_ERR(TAG, "unable to set CSP name");
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goto out;
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}
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if (!settings->CspName &&
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!freerdp_settings_set_string(settings, FreeRDP_CspName, MS_SCARD_PROV_A))
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{
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WLog_ERR(TAG, "unable to set CSP name");
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goto out;
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}
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}
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if (!settings->ReaderName && nla->smartcardCert->reader)
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{
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if (!freerdp_settings_set_string_from_utf16(settings, FreeRDP_ReaderName,
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nla->smartcardCert->reader))
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{
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WLog_ERR(TAG, "unable to copy reader name");
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goto out;
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}
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}
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if (!settings->ContainerName && nla->smartcardCert->containerName)
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{
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if (!freerdp_settings_set_string_from_utf16(settings, FreeRDP_ContainerName,
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nla->smartcardCert->containerName))
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{
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WLog_ERR(TAG, "unable to copy container name");
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goto out;
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}
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}
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memcpy(nla->certSha1, nla->smartcardCert->sha1Hash, sizeof(nla->certSha1));
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if (nla->smartcardCert->pkinitArgs)
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{
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nla->pkinitArgs = _strdup(nla->smartcardCert->pkinitArgs);
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if (!nla->pkinitArgs)
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{
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WLog_ERR(TAG, "unable to copy pkinitArgs");
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goto out;
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}
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}
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ret = TRUE;
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out:
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return ret;
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}
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static BOOL nla_client_setup_identity(rdpNla* nla)
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{
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BOOL PromptPassword = FALSE;
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WINPR_ASSERT(nla);
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WINPR_ASSERT(nla->rdpcontext);
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rdpSettings* settings = nla->rdpcontext->settings;
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WINPR_ASSERT(settings);
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freerdp* instance = nla->rdpcontext->instance;
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WINPR_ASSERT(instance);
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/* */
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if ((utils_str_is_empty(settings->Username) ||
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(utils_str_is_empty(settings->Password) &&
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utils_str_is_empty((const char*)settings->RedirectionPassword))))
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{
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PromptPassword = TRUE;
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}
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if (PromptPassword && !utils_str_is_empty(settings->Username))
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{
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WINPR_SAM* sam = SamOpen(NULL, TRUE);
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if (sam)
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{
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const size_t userLength = strlen(settings->Username);
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WINPR_SAM_ENTRY* entry = SamLookupUserA(
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sam, settings->Username, userLength + 1 /* ensure '\0' is checked too */, NULL, 0);
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if (entry)
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{
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/**
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* The user could be found in SAM database.
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* Use entry in SAM database later instead of prompt
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*/
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PromptPassword = FALSE;
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SamFreeEntry(sam, entry);
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}
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SamClose(sam);
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}
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}
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if (PromptPassword)
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{
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if (settings->RestrictedAdminModeRequired)
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{
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if ((settings->PasswordHash) && (strlen(settings->PasswordHash) > 0))
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PromptPassword = FALSE;
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}
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if (settings->RemoteCredentialGuard)
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PromptPassword = FALSE;
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}
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BOOL smartCardLogonWasDisabled = !settings->SmartcardLogon;
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if (PromptPassword)
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{
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switch (utils_authenticate(instance, AUTH_NLA, TRUE))
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{
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case AUTH_SKIP:
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case AUTH_SUCCESS:
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break;
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case AUTH_CANCELLED:
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freerdp_set_last_error_log(instance->context, FREERDP_ERROR_CONNECT_CANCELLED);
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return FALSE;
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case AUTH_NO_CREDENTIALS:
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WLog_INFO(TAG, "No credentials provided - using NULL identity");
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break;
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default:
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return FALSE;
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}
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}
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if (!settings->Username)
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{
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sspi_FreeAuthIdentity(nla->identity);
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nla->identity = NULL;
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}
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else if (settings->SmartcardLogon)
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{
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if (smartCardLogonWasDisabled)
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{
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if (!nla_adjust_settings_from_smartcard(nla))
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return FALSE;
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}
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if (!identity_set_from_smartcard_hash(nla->identity, settings, FreeRDP_Username,
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FreeRDP_Domain, FreeRDP_Password, nla->certSha1,
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sizeof(nla->certSha1)))
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return FALSE;
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}
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else
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{
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BOOL usePassword = TRUE;
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if (settings->RedirectionPassword && (settings->RedirectionPasswordLength > 0))
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{
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if (!identity_set_from_settings_with_pwd(
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nla->identity, settings, FreeRDP_Username, FreeRDP_Domain,
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(const WCHAR*)settings->RedirectionPassword,
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settings->RedirectionPasswordLength / sizeof(WCHAR)))
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return FALSE;
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usePassword = FALSE;
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}
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if (settings->RestrictedAdminModeRequired)
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{
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if (settings->PasswordHash && strlen(settings->PasswordHash) == 32)
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{
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if (!identity_set_from_settings(nla->identity, settings, FreeRDP_Username,
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FreeRDP_Domain, FreeRDP_PasswordHash))
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return FALSE;
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/**
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* Increase password hash length by LB_PASSWORD_MAX_LENGTH to obtain a
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* length exceeding the maximum (LB_PASSWORD_MAX_LENGTH) and use it this for
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* hash identification in WinPR.
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*/
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nla->identity->PasswordLength += LB_PASSWORD_MAX_LENGTH;
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usePassword = FALSE;
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}
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}
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if (usePassword)
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{
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if (!identity_set_from_settings(nla->identity, settings, FreeRDP_Username,
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FreeRDP_Domain, FreeRDP_Password))
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return FALSE;
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}
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}
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return TRUE;
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}
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static int nla_client_init(rdpNla* nla)
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{
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WINPR_ASSERT(nla);
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WINPR_ASSERT(nla->rdpcontext);
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rdpSettings* settings = nla->rdpcontext->settings;
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WINPR_ASSERT(settings);
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nla_set_state(nla, NLA_STATE_INITIAL);
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if (!nla_adjust_settings_from_smartcard(nla))
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return -1;
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if (!credssp_auth_init(nla->auth, NLA_AUTH_PKG, NULL))
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return -1;
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if (!nla_client_setup_identity(nla))
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return -1;
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const char* hostname = freerdp_settings_get_server_name(settings);
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if (!credssp_auth_setup_client(nla->auth, "TERMSRV", hostname, nla->identity, nla->pkinitArgs))
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return -1;
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const BYTE* data = NULL;
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DWORD length = 0;
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if (!transport_get_public_key(nla->transport, &data, &length))
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{
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WLog_ERR(TAG, "Failed to get public key");
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return -1;
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}
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if (!nla_sec_buffer_alloc_from_data(&nla->PublicKey, data, 0, length))
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{
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WLog_ERR(TAG, "Failed to allocate sspi secBuffer");
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return -1;
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}
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return 1;
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}
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int nla_client_begin(rdpNla* nla)
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{
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WINPR_ASSERT(nla);
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if (nla_client_init(nla) < 1)
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return -1;
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if (nla_get_state(nla) != NLA_STATE_INITIAL)
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return -1;
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/*
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* from tspkg.dll: 0x00000132
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* ISC_REQ_MUTUAL_AUTH
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* ISC_REQ_CONFIDENTIALITY
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* ISC_REQ_USE_SESSION_KEY
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* ISC_REQ_ALLOCATE_MEMORY
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*/
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credssp_auth_set_flags(nla->auth, ISC_REQ_MUTUAL_AUTH | ISC_REQ_CONFIDENTIALITY);
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const int rc = credssp_auth_authenticate(nla->auth);
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switch (rc)
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{
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case 0:
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if (!nla_send(nla))
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return -1;
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nla_set_state(nla, NLA_STATE_NEGO_TOKEN);
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break;
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case 1:
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if (credssp_auth_have_output_token(nla->auth))
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{
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if (!nla_send(nla))
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return -1;
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}
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nla_set_state(nla, NLA_STATE_FINAL);
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break;
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default:
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switch (credssp_auth_sspi_error(nla->auth))
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{
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case SEC_E_LOGON_DENIED:
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case SEC_E_NO_CREDENTIALS:
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freerdp_set_last_error_log(nla->rdpcontext,
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FREERDP_ERROR_CONNECT_LOGON_FAILURE);
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break;
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default:
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int nla_client_recv_nego_token(rdpNla* nla)
|
|
{
|
|
credssp_auth_take_input_buffer(nla->auth, &nla->negoToken);
|
|
const int rc = credssp_auth_authenticate(nla->auth);
|
|
|
|
switch (rc)
|
|
{
|
|
case 0:
|
|
if (!nla_send(nla))
|
|
return -1;
|
|
break;
|
|
case 1: /* completed */
|
|
{
|
|
int res = -1;
|
|
if (nla->peerVersion < 5)
|
|
res = nla_encrypt_public_key_echo(nla);
|
|
else
|
|
res = nla_encrypt_public_key_hash(nla);
|
|
|
|
if (!res)
|
|
return -1;
|
|
|
|
if (!nla_send(nla))
|
|
return -1;
|
|
|
|
nla_set_state(nla, NLA_STATE_PUB_KEY_AUTH);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int nla_client_recv_pub_key_auth(rdpNla* nla)
|
|
{
|
|
BOOL rc = FALSE;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
/* Verify Server Public Key Echo */
|
|
if (nla->peerVersion < 5)
|
|
rc = nla_decrypt_public_key_echo(nla);
|
|
else
|
|
rc = nla_decrypt_public_key_hash(nla);
|
|
|
|
sspi_SecBufferFree(&nla->pubKeyAuth);
|
|
|
|
if (!rc)
|
|
return -1;
|
|
|
|
/* Send encrypted credentials */
|
|
rc = nla_encrypt_ts_credentials(nla);
|
|
if (!rc)
|
|
return -1;
|
|
|
|
if (!nla_send(nla))
|
|
return -1;
|
|
|
|
if (nla->earlyUserAuth)
|
|
{
|
|
transport_set_early_user_auth_mode(nla->transport, TRUE);
|
|
nla_set_state(nla, NLA_STATE_EARLY_USER_AUTH);
|
|
}
|
|
else
|
|
nla_set_state(nla, NLA_STATE_AUTH_INFO);
|
|
return 1;
|
|
}
|
|
|
|
static int nla_client_recv_early_user_auth(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
transport_set_early_user_auth_mode(nla->transport, FALSE);
|
|
nla_set_state(nla, NLA_STATE_AUTH_INFO);
|
|
return 1;
|
|
}
|
|
|
|
static int nla_client_recv(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
switch (nla_get_state(nla))
|
|
{
|
|
case NLA_STATE_NEGO_TOKEN:
|
|
return nla_client_recv_nego_token(nla);
|
|
|
|
case NLA_STATE_PUB_KEY_AUTH:
|
|
return nla_client_recv_pub_key_auth(nla);
|
|
|
|
case NLA_STATE_EARLY_USER_AUTH:
|
|
return nla_client_recv_early_user_auth(nla);
|
|
|
|
case NLA_STATE_FINAL:
|
|
default:
|
|
WLog_ERR(TAG, "NLA in invalid client receive state %s",
|
|
nla_get_state_str(nla_get_state(nla)));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int nla_client_authenticate(rdpNla* nla)
|
|
{
|
|
int rc = -1;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
wStream* s = Stream_New(NULL, 4096);
|
|
|
|
if (!s)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
return -1;
|
|
}
|
|
|
|
if (nla_client_begin(nla) < 1)
|
|
goto fail;
|
|
|
|
while (nla_get_state(nla) < NLA_STATE_AUTH_INFO)
|
|
{
|
|
Stream_SetPosition(s, 0);
|
|
const int status = transport_read_pdu(nla->transport, s);
|
|
|
|
if (status < 0)
|
|
{
|
|
WLog_ERR(TAG, "nla_client_authenticate failure");
|
|
goto fail;
|
|
}
|
|
|
|
const int status2 = nla_recv_pdu(nla, s);
|
|
|
|
if (status2 < 0)
|
|
goto fail;
|
|
}
|
|
|
|
rc = 1;
|
|
fail:
|
|
Stream_Free(s, TRUE);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Initialize NTLMSSP authentication module (server).
|
|
*/
|
|
|
|
static int nla_server_init(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
const BYTE* data = NULL;
|
|
DWORD length = 0;
|
|
if (!transport_get_public_key(nla->transport, &data, &length))
|
|
{
|
|
WLog_ERR(TAG, "Failed to get public key");
|
|
return -1;
|
|
}
|
|
|
|
if (!nla_sec_buffer_alloc_from_data(&nla->PublicKey, data, 0, length))
|
|
{
|
|
WLog_ERR(TAG, "Failed to allocate SecBuffer for public key");
|
|
return -1;
|
|
}
|
|
|
|
if (!credssp_auth_init(nla->auth, NLA_AUTH_PKG, NULL))
|
|
return -1;
|
|
|
|
if (!credssp_auth_setup_server(nla->auth))
|
|
return -1;
|
|
|
|
nla_set_state(nla, NLA_STATE_INITIAL);
|
|
return 1;
|
|
}
|
|
|
|
static wStream* nla_server_recv_stream(rdpNla* nla)
|
|
{
|
|
wStream* s = NULL;
|
|
int status = -1;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
s = Stream_New(NULL, 4096);
|
|
|
|
if (!s)
|
|
goto fail;
|
|
|
|
status = transport_read_pdu(nla->transport, s);
|
|
|
|
fail:
|
|
if (status < 0)
|
|
{
|
|
WLog_ERR(TAG, "nla_recv() error: %d", status);
|
|
Stream_Free(s, TRUE);
|
|
return NULL;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BOOL nla_server_recv_credentials(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
if (nla_server_recv(nla) < 0)
|
|
return FALSE;
|
|
|
|
if (!nla_decrypt_ts_credentials(nla))
|
|
return FALSE;
|
|
|
|
if (!nla_impersonate(nla))
|
|
return FALSE;
|
|
|
|
if (!nla_revert_to_self(nla))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Authenticate with client using CredSSP (server).
|
|
* @param nla The NLA instance to use
|
|
*
|
|
* @return 1 if authentication is successful
|
|
*/
|
|
|
|
static int nla_server_authenticate(rdpNla* nla)
|
|
{
|
|
int ret = -1;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
if (nla_server_init(nla) < 1)
|
|
goto fail;
|
|
|
|
/*
|
|
* from tspkg.dll: 0x00000112
|
|
* ASC_REQ_MUTUAL_AUTH
|
|
* ASC_REQ_CONFIDENTIALITY
|
|
* ASC_REQ_ALLOCATE_MEMORY
|
|
*/
|
|
credssp_auth_set_flags(nla->auth, ASC_REQ_MUTUAL_AUTH | ASC_REQ_CONFIDENTIALITY |
|
|
ASC_REQ_CONNECTION | ASC_REQ_USE_SESSION_KEY |
|
|
ASC_REQ_SEQUENCE_DETECT | ASC_REQ_EXTENDED_ERROR);
|
|
|
|
/* Client is starting, here es the state machine:
|
|
*
|
|
* -- NLA_STATE_INITIAL --> NLA_STATE_INITIAL
|
|
* ----->> sending...
|
|
* ----->> protocol version 6
|
|
* ----->> nego token
|
|
* ----->> client nonce
|
|
* <<----- receiving...
|
|
* <<----- protocol version 6
|
|
* <<----- nego token
|
|
* ----->> sending...
|
|
* ----->> protocol version 6
|
|
* ----->> nego token
|
|
* ----->> public key auth
|
|
* ----->> client nonce
|
|
* -- NLA_STATE_NEGO_TOKEN --> NLA_STATE_PUB_KEY_AUTH
|
|
* <<----- receiving...
|
|
* <<----- protocol version 6
|
|
* <<----- public key info
|
|
* ----->> sending...
|
|
* ----->> protocol version 6
|
|
* ----->> auth info
|
|
* ----->> client nonce
|
|
* -- NLA_STATE_PUB_KEY_AUTH --> NLA_STATE
|
|
*/
|
|
|
|
while (TRUE)
|
|
{
|
|
int res = -1;
|
|
|
|
if (nla_server_recv(nla) < 0)
|
|
goto fail;
|
|
|
|
WLog_DBG(TAG, "Receiving Authentication Token");
|
|
credssp_auth_take_input_buffer(nla->auth, &nla->negoToken);
|
|
|
|
res = credssp_auth_authenticate(nla->auth);
|
|
|
|
if (res == -1)
|
|
{
|
|
/* Special handling of these specific error codes as NTSTATUS_FROM_WIN32
|
|
unfortunately does not map directly to the corresponding NTSTATUS values
|
|
*/
|
|
switch (GetLastError())
|
|
{
|
|
case ERROR_PASSWORD_MUST_CHANGE:
|
|
nla->errorCode = STATUS_PASSWORD_MUST_CHANGE;
|
|
break;
|
|
|
|
case ERROR_PASSWORD_EXPIRED:
|
|
nla->errorCode = STATUS_PASSWORD_EXPIRED;
|
|
break;
|
|
|
|
case ERROR_ACCOUNT_DISABLED:
|
|
nla->errorCode = STATUS_ACCOUNT_DISABLED;
|
|
break;
|
|
|
|
default:
|
|
nla->errorCode = NTSTATUS_FROM_WIN32(GetLastError());
|
|
break;
|
|
}
|
|
|
|
(void)nla_send(nla);
|
|
/* Access Denied */
|
|
goto fail;
|
|
}
|
|
|
|
if (res == 1)
|
|
{
|
|
/* Process final part of the nego token exchange */
|
|
if (credssp_auth_have_output_token(nla->auth))
|
|
{
|
|
if (!nla_send(nla))
|
|
goto fail;
|
|
|
|
if (nla_server_recv(nla) < 0)
|
|
goto fail;
|
|
|
|
WLog_DBG(TAG, "Receiving pubkey Token");
|
|
}
|
|
|
|
if (nla->peerVersion < 5)
|
|
res = nla_decrypt_public_key_echo(nla);
|
|
else
|
|
res = nla_decrypt_public_key_hash(nla);
|
|
|
|
if (!res)
|
|
goto fail;
|
|
|
|
/* Clear nego token buffer or we will send it again to the client */
|
|
sspi_SecBufferFree(&nla->negoToken);
|
|
|
|
if (nla->peerVersion < 5)
|
|
res = nla_encrypt_public_key_echo(nla);
|
|
else
|
|
res = nla_encrypt_public_key_hash(nla);
|
|
|
|
if (!res)
|
|
goto fail;
|
|
}
|
|
|
|
/* send authentication token */
|
|
WLog_DBG(TAG, "Sending Authentication Token");
|
|
|
|
if (!nla_send(nla))
|
|
goto fail;
|
|
|
|
if (res == 1)
|
|
{
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Receive encrypted credentials */
|
|
if (!nla_server_recv_credentials(nla))
|
|
ret = -1;
|
|
|
|
fail:
|
|
nla_buffer_free(nla);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Authenticate using CredSSP.
|
|
* @param nla The NLA instance to use
|
|
*
|
|
* @return 1 if authentication is successful
|
|
*/
|
|
|
|
int nla_authenticate(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
if (nla->server)
|
|
return nla_server_authenticate(nla);
|
|
else
|
|
return nla_client_authenticate(nla);
|
|
}
|
|
|
|
static void ap_integer_increment_le(BYTE* number, size_t size)
|
|
{
|
|
WINPR_ASSERT(number || (size == 0));
|
|
|
|
for (size_t index = 0; index < size; index++)
|
|
{
|
|
if (number[index] < 0xFF)
|
|
{
|
|
number[index]++;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
number[index] = 0;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ap_integer_decrement_le(BYTE* number, size_t size)
|
|
{
|
|
WINPR_ASSERT(number || (size == 0));
|
|
|
|
for (size_t index = 0; index < size; index++)
|
|
{
|
|
if (number[index] > 0)
|
|
{
|
|
number[index]--;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
number[index] = 0xFF;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
BOOL nla_encrypt_public_key_echo(rdpNla* nla)
|
|
{
|
|
BOOL status = FALSE;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
sspi_SecBufferFree(&nla->pubKeyAuth);
|
|
if (nla->server)
|
|
{
|
|
SecBuffer buf = { 0 };
|
|
if (!sspi_SecBufferAlloc(&buf, nla->PublicKey.cbBuffer))
|
|
return FALSE;
|
|
ap_integer_increment_le(buf.pvBuffer, buf.cbBuffer);
|
|
status = credssp_auth_encrypt(nla->auth, &buf, &nla->pubKeyAuth, NULL, nla->sendSeqNum++);
|
|
sspi_SecBufferFree(&buf);
|
|
}
|
|
else
|
|
{
|
|
status = credssp_auth_encrypt(nla->auth, &nla->PublicKey, &nla->pubKeyAuth, NULL,
|
|
nla->sendSeqNum++);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
BOOL nla_encrypt_public_key_hash(rdpNla* nla)
|
|
{
|
|
BOOL status = FALSE;
|
|
WINPR_DIGEST_CTX* sha256 = NULL;
|
|
SecBuffer buf = { 0 };
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
const BYTE* hashMagic = nla->server ? ServerClientHashMagic : ClientServerHashMagic;
|
|
const size_t hashSize =
|
|
nla->server ? sizeof(ServerClientHashMagic) : sizeof(ClientServerHashMagic);
|
|
|
|
if (!sspi_SecBufferAlloc(&buf, WINPR_SHA256_DIGEST_LENGTH))
|
|
return FALSE;
|
|
|
|
/* generate SHA256 of following data: ClientServerHashMagic, Nonce, SubjectPublicKey */
|
|
if (!(sha256 = winpr_Digest_New()))
|
|
goto out;
|
|
|
|
if (!winpr_Digest_Init(sha256, WINPR_MD_SHA256))
|
|
goto out;
|
|
|
|
/* include trailing \0 from hashMagic */
|
|
if (!winpr_Digest_Update(sha256, hashMagic, hashSize))
|
|
goto out;
|
|
|
|
if (!nla_Digest_Update_From_SecBuffer(sha256, &nla->ClientNonce))
|
|
goto out;
|
|
|
|
/* SubjectPublicKey */
|
|
if (!nla_Digest_Update_From_SecBuffer(sha256, &nla->PublicKey))
|
|
goto out;
|
|
|
|
if (!winpr_Digest_Final(sha256, buf.pvBuffer, WINPR_SHA256_DIGEST_LENGTH))
|
|
goto out;
|
|
|
|
sspi_SecBufferFree(&nla->pubKeyAuth);
|
|
if (!credssp_auth_encrypt(nla->auth, &buf, &nla->pubKeyAuth, NULL, nla->sendSeqNum++))
|
|
goto out;
|
|
|
|
status = TRUE;
|
|
|
|
out:
|
|
winpr_Digest_Free(sha256);
|
|
sspi_SecBufferFree(&buf);
|
|
return status;
|
|
}
|
|
|
|
BOOL nla_decrypt_public_key_echo(rdpNla* nla)
|
|
{
|
|
BOOL status = FALSE;
|
|
SecBuffer public_key = { 0 };
|
|
|
|
if (!nla)
|
|
goto fail;
|
|
|
|
if (!credssp_auth_decrypt(nla->auth, &nla->pubKeyAuth, &public_key, nla->recvSeqNum++))
|
|
return FALSE;
|
|
|
|
if (!nla->server)
|
|
{
|
|
/* server echos the public key +1 */
|
|
ap_integer_decrement_le(public_key.pvBuffer, public_key.cbBuffer);
|
|
}
|
|
|
|
if (public_key.cbBuffer != nla->PublicKey.cbBuffer ||
|
|
memcmp(public_key.pvBuffer, nla->PublicKey.pvBuffer, public_key.cbBuffer) != 0)
|
|
{
|
|
WLog_ERR(TAG, "Could not verify server's public key echo");
|
|
#if defined(WITH_DEBUG_NLA)
|
|
WLog_ERR(TAG, "Expected (length = %" PRIu32 "):", nla->PublicKey.cbBuffer);
|
|
winpr_HexDump(TAG, WLOG_ERROR, nla->PublicKey.pvBuffer, nla->PublicKey.cbBuffer);
|
|
WLog_ERR(TAG, "Actual (length = %" PRIu32 "):", public_key.cbBuffer);
|
|
winpr_HexDump(TAG, WLOG_ERROR, public_key.pvBuffer, public_key.cbBuffer);
|
|
#endif
|
|
/* DO NOT SEND CREDENTIALS! */
|
|
goto fail;
|
|
}
|
|
|
|
status = TRUE;
|
|
fail:
|
|
sspi_SecBufferFree(&public_key);
|
|
return status;
|
|
}
|
|
|
|
BOOL nla_decrypt_public_key_hash(rdpNla* nla)
|
|
{
|
|
WINPR_DIGEST_CTX* sha256 = NULL;
|
|
BYTE serverClientHash[WINPR_SHA256_DIGEST_LENGTH] = { 0 };
|
|
BOOL status = FALSE;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
const BYTE* hashMagic = nla->server ? ClientServerHashMagic : ServerClientHashMagic;
|
|
const size_t hashSize =
|
|
nla->server ? sizeof(ClientServerHashMagic) : sizeof(ServerClientHashMagic);
|
|
SecBuffer hash = { 0 };
|
|
|
|
if (!credssp_auth_decrypt(nla->auth, &nla->pubKeyAuth, &hash, nla->recvSeqNum++))
|
|
return FALSE;
|
|
|
|
/* generate SHA256 of following data: ServerClientHashMagic, Nonce, SubjectPublicKey */
|
|
if (!(sha256 = winpr_Digest_New()))
|
|
goto fail;
|
|
|
|
if (!winpr_Digest_Init(sha256, WINPR_MD_SHA256))
|
|
goto fail;
|
|
|
|
/* include trailing \0 from hashMagic */
|
|
if (!winpr_Digest_Update(sha256, hashMagic, hashSize))
|
|
goto fail;
|
|
|
|
if (!nla_Digest_Update_From_SecBuffer(sha256, &nla->ClientNonce))
|
|
goto fail;
|
|
|
|
/* SubjectPublicKey */
|
|
if (!nla_Digest_Update_From_SecBuffer(sha256, &nla->PublicKey))
|
|
goto fail;
|
|
|
|
if (!winpr_Digest_Final(sha256, serverClientHash, sizeof(serverClientHash)))
|
|
goto fail;
|
|
|
|
/* verify hash */
|
|
if (hash.cbBuffer != WINPR_SHA256_DIGEST_LENGTH ||
|
|
memcmp(serverClientHash, hash.pvBuffer, WINPR_SHA256_DIGEST_LENGTH) != 0)
|
|
{
|
|
WLog_ERR(TAG, "Could not verify server's hash");
|
|
/* DO NOT SEND CREDENTIALS! */
|
|
goto fail;
|
|
}
|
|
|
|
status = TRUE;
|
|
fail:
|
|
winpr_Digest_Free(sha256);
|
|
sspi_SecBufferFree(&hash);
|
|
return status;
|
|
}
|
|
|
|
static BOOL set_creds_octetstring_to_settings(WinPrAsn1Decoder* dec, WinPrAsn1_tagId tagId,
|
|
BOOL optional, FreeRDP_Settings_Keys_String settingId,
|
|
rdpSettings* settings)
|
|
{
|
|
if (optional)
|
|
{
|
|
WinPrAsn1_tagId itemTag = 0;
|
|
if (!WinPrAsn1DecPeekTag(dec, &itemTag) || (itemTag != tagId))
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL error = FALSE;
|
|
WinPrAsn1_OctetString value;
|
|
/* note: not checking "error" value, as the not present optional item case is handled above
|
|
* if the function fails it's because of a real error not because the item is not present
|
|
*/
|
|
if (!WinPrAsn1DecReadContextualOctetString(dec, tagId, &error, &value, FALSE))
|
|
return FALSE;
|
|
|
|
return freerdp_settings_set_string_from_utf16N(settings, settingId, (const WCHAR*)value.data,
|
|
value.len / sizeof(WCHAR));
|
|
}
|
|
|
|
static BOOL nla_read_TSCspDataDetail(WinPrAsn1Decoder* dec, rdpSettings* settings)
|
|
{
|
|
BOOL error = FALSE;
|
|
|
|
/* keySpec [0] INTEGER */
|
|
WinPrAsn1_INTEGER keyspec = 0;
|
|
if (!WinPrAsn1DecReadContextualInteger(dec, 0, &error, &keyspec))
|
|
return FALSE;
|
|
settings->KeySpec = (UINT32)keyspec;
|
|
|
|
/* cardName [1] OCTET STRING OPTIONAL */
|
|
if (!set_creds_octetstring_to_settings(dec, 1, TRUE, FreeRDP_CardName, settings))
|
|
return FALSE;
|
|
|
|
/* readerName [2] OCTET STRING OPTIONAL */
|
|
if (!set_creds_octetstring_to_settings(dec, 2, TRUE, FreeRDP_ReaderName, settings))
|
|
return FALSE;
|
|
|
|
/* containerName [3] OCTET STRING OPTIONAL */
|
|
if (!set_creds_octetstring_to_settings(dec, 3, TRUE, FreeRDP_ContainerName, settings))
|
|
return FALSE;
|
|
|
|
/* cspName [4] OCTET STRING OPTIONAL */
|
|
return set_creds_octetstring_to_settings(dec, 4, TRUE, FreeRDP_CspName, settings);
|
|
}
|
|
|
|
static BOOL nla_read_KERB_TICKET_LOGON(rdpNla* nla, wStream* s, KERB_TICKET_LOGON* ticket)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
if (!ticket)
|
|
return FALSE;
|
|
|
|
/* mysterious extra 16 bytes before TGS/TGT content */
|
|
if (!Stream_CheckAndLogRequiredLength(TAG, s, 16 + 16))
|
|
return FALSE;
|
|
|
|
Stream_Read_UINT32(s, ticket->MessageType);
|
|
Stream_Read_UINT32(s, ticket->Flags);
|
|
Stream_Read_UINT32(s, ticket->ServiceTicketLength);
|
|
Stream_Read_UINT32(s, ticket->TicketGrantingTicketLength);
|
|
|
|
if (ticket->MessageType != KerbTicketLogon)
|
|
{
|
|
WLog_ERR(TAG, "Not a KerbTicketLogon");
|
|
return FALSE;
|
|
}
|
|
|
|
if (!Stream_CheckAndLogRequiredLength(
|
|
TAG, s, 16ull + ticket->ServiceTicketLength + ticket->TicketGrantingTicketLength))
|
|
return FALSE;
|
|
|
|
/* mysterious 16 bytes in the way, maybe they would need to be interpreted... */
|
|
Stream_Seek(s, 16);
|
|
|
|
/*WLog_INFO(TAG, "TGS");
|
|
winpr_HexDump(TAG, WLOG_DEBUG, Stream_PointerAs(s, const BYTE), ticket->ServiceTicketLength);*/
|
|
ticket->ServiceTicket = Stream_PointerAs(s, UCHAR);
|
|
Stream_Seek(s, ticket->ServiceTicketLength);
|
|
|
|
/*WLog_INFO(TAG, "TGT");
|
|
winpr_HexDump(TAG, WLOG_DEBUG, Stream_PointerAs(s, const BYTE),
|
|
ticket->TicketGrantingTicketLength);*/
|
|
ticket->TicketGrantingTicket = Stream_PointerAs(s, UCHAR);
|
|
return TRUE;
|
|
}
|
|
|
|
/** @brief kind of RCG credentials */
|
|
typedef enum
|
|
{
|
|
RCG_TYPE_KERB,
|
|
RCG_TYPE_NTLM
|
|
} RemoteGuardPackageCredType;
|
|
|
|
static BOOL nla_read_TSRemoteGuardPackageCred(rdpNla* nla, WinPrAsn1Decoder* dec,
|
|
RemoteGuardPackageCredType* credsType,
|
|
wStream* payload)
|
|
{
|
|
WinPrAsn1_OctetString packageName = { 0 };
|
|
WinPrAsn1_OctetString credBuffer = { 0 };
|
|
BOOL error = FALSE;
|
|
char packageNameStr[100] = { 0 };
|
|
|
|
/* packageName [0] OCTET STRING */
|
|
if (!WinPrAsn1DecReadContextualOctetString(dec, 0, &error, &packageName, FALSE) || error)
|
|
return TRUE;
|
|
|
|
ConvertMszWCharNToUtf8((WCHAR*)packageName.data, packageName.len / sizeof(WCHAR),
|
|
packageNameStr, 100);
|
|
WLog_DBG(TAG, "TSRemoteGuardPackageCred(%s)", packageNameStr);
|
|
|
|
/* credBuffer [1] OCTET STRING, */
|
|
if (!WinPrAsn1DecReadContextualOctetString(dec, 1, &error, &credBuffer, FALSE) || error)
|
|
return TRUE;
|
|
|
|
if (_stricmp(packageNameStr, "Kerberos") == 0)
|
|
{
|
|
*credsType = RCG_TYPE_KERB;
|
|
}
|
|
else if (_stricmp(packageNameStr, "NTLM") == 0)
|
|
{
|
|
*credsType = RCG_TYPE_NTLM;
|
|
}
|
|
else
|
|
{
|
|
WLog_INFO(TAG, "TSRemoteGuardPackageCred package %s not handled", packageNameStr);
|
|
return FALSE;
|
|
}
|
|
|
|
Stream_StaticInit(payload, credBuffer.data, credBuffer.len);
|
|
return TRUE;
|
|
}
|
|
|
|
/** @brief kind of TSCreds */
|
|
typedef enum
|
|
{
|
|
TSCREDS_INVALID = 0,
|
|
TSCREDS_USER_PASSWD = 1,
|
|
TSCREDS_SMARTCARD = 2,
|
|
TSCREDS_REMOTEGUARD = 6
|
|
} TsCredentialsType;
|
|
|
|
static BOOL nla_read_ts_credentials(rdpNla* nla, SecBuffer* data)
|
|
{
|
|
WinPrAsn1Decoder dec = { 0 };
|
|
WinPrAsn1Decoder dec2 = { 0 };
|
|
WinPrAsn1_OctetString credentials = { 0 };
|
|
BOOL error = FALSE;
|
|
WinPrAsn1_INTEGER credType = -1;
|
|
BOOL ret = TRUE;
|
|
|
|
WINPR_ASSERT(nla);
|
|
WINPR_ASSERT(data);
|
|
|
|
WinPrAsn1Decoder_InitMem(&dec, WINPR_ASN1_DER, (BYTE*)data->pvBuffer, data->cbBuffer);
|
|
|
|
/* TSCredentials */
|
|
if (!WinPrAsn1DecReadSequence(&dec, &dec2))
|
|
return FALSE;
|
|
dec = dec2;
|
|
|
|
/* credType [0] INTEGER */
|
|
if (!WinPrAsn1DecReadContextualInteger(&dec, 0, &error, &credType))
|
|
return FALSE;
|
|
|
|
/* credentials [1] OCTET STRING */
|
|
if (!WinPrAsn1DecReadContextualOctetString(&dec, 1, &error, &credentials, FALSE))
|
|
return FALSE;
|
|
|
|
WinPrAsn1Decoder_InitMem(&dec, WINPR_ASN1_DER, credentials.data, credentials.len);
|
|
|
|
rdpSettings* settings = nla->rdpcontext->settings;
|
|
if (nego_get_remoteCredentialGuard(nla->rdpcontext->rdp->nego) &&
|
|
credType != TSCREDS_REMOTEGUARD)
|
|
{
|
|
WLog_ERR(TAG, "connecting with RCG but it's not TSRemoteGuard credentials");
|
|
return FALSE;
|
|
}
|
|
|
|
switch (credType)
|
|
{
|
|
case TSCREDS_USER_PASSWD:
|
|
{
|
|
/* TSPasswordCreds */
|
|
if (!WinPrAsn1DecReadSequence(&dec, &dec2))
|
|
return FALSE;
|
|
dec = dec2;
|
|
|
|
/* domainName [0] OCTET STRING */
|
|
if (!set_creds_octetstring_to_settings(&dec, 0, FALSE, FreeRDP_Domain, settings))
|
|
return FALSE;
|
|
|
|
/* userName [1] OCTET STRING */
|
|
if (!set_creds_octetstring_to_settings(&dec, 1, FALSE, FreeRDP_Username, settings))
|
|
return FALSE;
|
|
|
|
/* password [2] OCTET STRING */
|
|
return set_creds_octetstring_to_settings(&dec, 2, FALSE, FreeRDP_Password, settings);
|
|
}
|
|
case TSCREDS_SMARTCARD:
|
|
{
|
|
/* TSSmartCardCreds */
|
|
if (!WinPrAsn1DecReadSequence(&dec, &dec2))
|
|
return FALSE;
|
|
dec = dec2;
|
|
|
|
/* pin [0] OCTET STRING, */
|
|
if (!set_creds_octetstring_to_settings(&dec, 0, FALSE, FreeRDP_Password, settings))
|
|
return FALSE;
|
|
settings->PasswordIsSmartcardPin = TRUE;
|
|
|
|
/* cspData [1] TSCspDataDetail */
|
|
WinPrAsn1Decoder cspDetails = { 0 };
|
|
if (!WinPrAsn1DecReadContextualSequence(&dec, 1, &error, &cspDetails) && error)
|
|
return FALSE;
|
|
if (!nla_read_TSCspDataDetail(&cspDetails, settings))
|
|
return FALSE;
|
|
|
|
/* userHint [2] OCTET STRING OPTIONAL */
|
|
if (!set_creds_octetstring_to_settings(&dec, 2, TRUE, FreeRDP_Username, settings))
|
|
return FALSE;
|
|
|
|
/* domainHint [3] OCTET STRING OPTIONAL */
|
|
return set_creds_octetstring_to_settings(&dec, 3, TRUE, FreeRDP_Domain, settings);
|
|
}
|
|
case TSCREDS_REMOTEGUARD:
|
|
{
|
|
/* TSRemoteGuardCreds */
|
|
if (!WinPrAsn1DecReadSequence(&dec, &dec2))
|
|
return FALSE;
|
|
|
|
/* logonCred[0] TSRemoteGuardPackageCred */
|
|
KERB_TICKET_LOGON kerbLogon = { 0 };
|
|
WinPrAsn1Decoder logonCredsSeq = { 0 };
|
|
if (!WinPrAsn1DecReadContextualSequence(&dec2, 0, &error, &logonCredsSeq) || error)
|
|
return FALSE;
|
|
|
|
RemoteGuardPackageCredType logonCredsType = { 0 };
|
|
wStream logonPayload = { 0 };
|
|
if (!nla_read_TSRemoteGuardPackageCred(nla, &logonCredsSeq, &logonCredsType,
|
|
&logonPayload))
|
|
return FALSE;
|
|
if (logonCredsType != RCG_TYPE_KERB)
|
|
{
|
|
WLog_ERR(TAG, "logonCred must be some Kerberos creds");
|
|
return FALSE;
|
|
}
|
|
|
|
if (!nla_read_KERB_TICKET_LOGON(nla, &logonPayload, &kerbLogon))
|
|
{
|
|
WLog_ERR(TAG, "invalid KERB_TICKET_LOGON");
|
|
return FALSE;
|
|
}
|
|
|
|
/* supplementalCreds [1] SEQUENCE OF TSRemoteGuardPackageCred OPTIONAL, */
|
|
MSV1_0_SUPPLEMENTAL_CREDENTIAL* suppCreds = NULL;
|
|
WinPrAsn1Decoder suppCredsSeq = { 0 };
|
|
|
|
if (WinPrAsn1DecReadContextualSequence(&dec2, 1, &error, &suppCredsSeq))
|
|
{
|
|
WinPrAsn1Decoder ntlmCredsSeq = { 0 };
|
|
if (!WinPrAsn1DecReadSequence(&suppCredsSeq, &ntlmCredsSeq))
|
|
return FALSE;
|
|
|
|
RemoteGuardPackageCredType suppCredsType = { 0 };
|
|
wStream ntlmPayload = { 0 };
|
|
if (!nla_read_TSRemoteGuardPackageCred(nla, &ntlmCredsSeq, &suppCredsType,
|
|
&ntlmPayload))
|
|
return FALSE;
|
|
|
|
if (suppCredsType != RCG_TYPE_NTLM)
|
|
{
|
|
WLog_ERR(TAG, "supplementalCreds must be some NTLM creds");
|
|
return FALSE;
|
|
}
|
|
|
|
/* TODO: suppCreds = &ntlmCreds; and parse NTLM creds */
|
|
}
|
|
else if (error)
|
|
{
|
|
WLog_ERR(TAG, "invalid supplementalCreds");
|
|
return FALSE;
|
|
}
|
|
|
|
freerdp_peer* peer = nla->rdpcontext->peer;
|
|
ret = IFCALLRESULT(TRUE, peer->RemoteCredentials, peer, &kerbLogon, suppCreds);
|
|
break;
|
|
}
|
|
default:
|
|
WLog_DBG(TAG, "TSCredentials type " PRIu32 " not supported for now", credType);
|
|
ret = FALSE;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Encode TSCredentials structure.
|
|
* @param nla A pointer to the NLA to use
|
|
*
|
|
* @return \b TRUE for success, \b FALSE otherwise
|
|
*/
|
|
|
|
static BOOL nla_encode_ts_credentials(rdpNla* nla)
|
|
{
|
|
BOOL ret = FALSE;
|
|
WinPrAsn1Encoder* enc = NULL;
|
|
size_t length = 0;
|
|
wStream s = { 0 };
|
|
TsCredentialsType credType = TSCREDS_INVALID;
|
|
|
|
WINPR_ASSERT(nla);
|
|
WINPR_ASSERT(nla->rdpcontext);
|
|
|
|
rdpSettings* settings = nla->rdpcontext->settings;
|
|
WINPR_ASSERT(settings);
|
|
|
|
if (settings->RemoteCredentialGuard)
|
|
credType = TSCREDS_REMOTEGUARD;
|
|
else if (settings->SmartcardLogon)
|
|
credType = TSCREDS_SMARTCARD;
|
|
else
|
|
credType = TSCREDS_USER_PASSWD;
|
|
|
|
enc = WinPrAsn1Encoder_New(WINPR_ASN1_DER);
|
|
if (!enc)
|
|
return FALSE;
|
|
|
|
/* TSCredentials */
|
|
if (!WinPrAsn1EncSeqContainer(enc))
|
|
goto out;
|
|
|
|
/* credType [0] INTEGER */
|
|
if (!WinPrAsn1EncContextualInteger(enc, 0, (WinPrAsn1_INTEGER)credType))
|
|
goto out;
|
|
|
|
/* credentials [1] OCTET STRING */
|
|
if (!WinPrAsn1EncContextualOctetStringContainer(enc, 1))
|
|
goto out;
|
|
|
|
switch (credType)
|
|
{
|
|
case TSCREDS_SMARTCARD:
|
|
{
|
|
struct
|
|
{
|
|
WinPrAsn1_tagId tag;
|
|
size_t setting_id;
|
|
} cspData_fields[] = { { 1, FreeRDP_CardName },
|
|
{ 2, FreeRDP_ReaderName },
|
|
{ 3, FreeRDP_ContainerName },
|
|
{ 4, FreeRDP_CspName } };
|
|
WinPrAsn1_OctetString octet_string = { 0 };
|
|
|
|
/* TSSmartCardCreds */
|
|
if (!WinPrAsn1EncSeqContainer(enc))
|
|
goto out;
|
|
|
|
/* pin [0] OCTET STRING */
|
|
size_t ss = 0;
|
|
octet_string.data =
|
|
(BYTE*)freerdp_settings_get_string_as_utf16(settings, FreeRDP_Password, &ss);
|
|
octet_string.len = ss * sizeof(WCHAR);
|
|
const BOOL res = WinPrAsn1EncContextualOctetString(enc, 0, &octet_string) > 0;
|
|
free(octet_string.data);
|
|
if (!res)
|
|
goto out;
|
|
|
|
/* cspData [1] SEQUENCE */
|
|
if (!WinPrAsn1EncContextualSeqContainer(enc, 1))
|
|
goto out;
|
|
|
|
/* keySpec [0] INTEGER */
|
|
if (!WinPrAsn1EncContextualInteger(
|
|
enc, 0, freerdp_settings_get_uint32(settings, FreeRDP_KeySpec)))
|
|
goto out;
|
|
|
|
for (size_t i = 0; i < ARRAYSIZE(cspData_fields); i++)
|
|
{
|
|
size_t len = 0;
|
|
|
|
octet_string.data = (BYTE*)freerdp_settings_get_string_as_utf16(
|
|
settings, cspData_fields[i].setting_id, &len);
|
|
octet_string.len = len * sizeof(WCHAR);
|
|
if (octet_string.len)
|
|
{
|
|
const BOOL res2 = WinPrAsn1EncContextualOctetString(enc, cspData_fields[i].tag,
|
|
&octet_string) > 0;
|
|
free(octet_string.data);
|
|
if (!res2)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* End cspData */
|
|
if (!WinPrAsn1EncEndContainer(enc))
|
|
goto out;
|
|
|
|
/* End TSSmartCardCreds */
|
|
if (!WinPrAsn1EncEndContainer(enc))
|
|
goto out;
|
|
break;
|
|
}
|
|
case TSCREDS_USER_PASSWD:
|
|
{
|
|
WinPrAsn1_OctetString username = { 0 };
|
|
WinPrAsn1_OctetString domain = { 0 };
|
|
WinPrAsn1_OctetString password = { 0 };
|
|
|
|
/* TSPasswordCreds */
|
|
if (!WinPrAsn1EncSeqContainer(enc))
|
|
goto out;
|
|
|
|
if (!settings->DisableCredentialsDelegation && nla->identity)
|
|
{
|
|
username.len = nla->identity->UserLength * sizeof(WCHAR);
|
|
username.data = (BYTE*)nla->identity->User;
|
|
|
|
domain.len = nla->identity->DomainLength * sizeof(WCHAR);
|
|
domain.data = (BYTE*)nla->identity->Domain;
|
|
|
|
password.len = nla->identity->PasswordLength * sizeof(WCHAR);
|
|
password.data = (BYTE*)nla->identity->Password;
|
|
}
|
|
|
|
if (WinPrAsn1EncContextualOctetString(enc, 0, &domain) == 0)
|
|
goto out;
|
|
if (WinPrAsn1EncContextualOctetString(enc, 1, &username) == 0)
|
|
goto out;
|
|
if (WinPrAsn1EncContextualOctetString(enc, 2, &password) == 0)
|
|
goto out;
|
|
|
|
/* End TSPasswordCreds */
|
|
if (!WinPrAsn1EncEndContainer(enc))
|
|
goto out;
|
|
break;
|
|
}
|
|
case TSCREDS_REMOTEGUARD:
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
/* End credentials | End TSCredentials */
|
|
if (!WinPrAsn1EncEndContainer(enc) || !WinPrAsn1EncEndContainer(enc))
|
|
goto out;
|
|
|
|
if (!WinPrAsn1EncStreamSize(enc, &length))
|
|
goto out;
|
|
|
|
if (!nla_sec_buffer_alloc(&nla->tsCredentials, length))
|
|
{
|
|
WLog_ERR(TAG, "sspi_SecBufferAlloc failed!");
|
|
goto out;
|
|
}
|
|
|
|
Stream_StaticInit(&s, (BYTE*)nla->tsCredentials.pvBuffer, length);
|
|
|
|
ret = WinPrAsn1EncToStream(enc, &s);
|
|
|
|
out:
|
|
WinPrAsn1Encoder_Free(&enc);
|
|
return ret;
|
|
}
|
|
|
|
static BOOL nla_encrypt_ts_credentials(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
if (!nla_encode_ts_credentials(nla))
|
|
return FALSE;
|
|
|
|
sspi_SecBufferFree(&nla->authInfo);
|
|
if (!credssp_auth_encrypt(nla->auth, &nla->tsCredentials, &nla->authInfo, NULL,
|
|
nla->sendSeqNum++))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL nla_decrypt_ts_credentials(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
|
|
if (nla->authInfo.cbBuffer < 1)
|
|
{
|
|
WLog_ERR(TAG, "nla_decrypt_ts_credentials missing authInfo buffer");
|
|
return FALSE;
|
|
}
|
|
|
|
sspi_SecBufferFree(&nla->tsCredentials);
|
|
if (!credssp_auth_decrypt(nla->auth, &nla->authInfo, &nla->tsCredentials, nla->recvSeqNum++))
|
|
return FALSE;
|
|
|
|
if (!nla_read_ts_credentials(nla, &nla->tsCredentials))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL nla_write_octet_string(WinPrAsn1Encoder* enc, const SecBuffer* buffer,
|
|
WinPrAsn1_tagId tagId, const char* msg)
|
|
{
|
|
BOOL res = FALSE;
|
|
|
|
WINPR_ASSERT(enc);
|
|
WINPR_ASSERT(buffer);
|
|
WINPR_ASSERT(msg);
|
|
|
|
if (buffer->cbBuffer > 0)
|
|
{
|
|
size_t rc = 0;
|
|
WinPrAsn1_OctetString octet_string = { 0 };
|
|
|
|
WLog_DBG(TAG, " ----->> %s", msg);
|
|
octet_string.data = buffer->pvBuffer;
|
|
octet_string.len = buffer->cbBuffer;
|
|
rc = WinPrAsn1EncContextualOctetString(enc, tagId, &octet_string);
|
|
if (rc != 0)
|
|
res = TRUE;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static BOOL nla_write_octet_string_free(WinPrAsn1Encoder* enc, SecBuffer* buffer,
|
|
WinPrAsn1_tagId tagId, const char* msg)
|
|
{
|
|
const BOOL rc = nla_write_octet_string(enc, buffer, tagId, msg);
|
|
sspi_SecBufferFree(buffer);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Send CredSSP message.
|
|
*
|
|
* @param nla A pointer to the NLA to use
|
|
*
|
|
* @return \b TRUE for success, \b FALSE otherwise
|
|
*/
|
|
|
|
BOOL nla_send(rdpNla* nla)
|
|
{
|
|
BOOL rc = FALSE;
|
|
wStream* s = NULL;
|
|
size_t length = 0;
|
|
WinPrAsn1Encoder* enc = NULL;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
enc = WinPrAsn1Encoder_New(WINPR_ASN1_DER);
|
|
if (!enc)
|
|
return FALSE;
|
|
|
|
/* TSRequest */
|
|
WLog_DBG(TAG, "----->> sending...");
|
|
if (!WinPrAsn1EncSeqContainer(enc))
|
|
goto fail;
|
|
|
|
/* version [0] INTEGER */
|
|
WLog_DBG(TAG, " ----->> protocol version %" PRIu32, nla->version);
|
|
if (!WinPrAsn1EncContextualInteger(enc, 0, nla->version))
|
|
goto fail;
|
|
|
|
/* negoTokens [1] SEQUENCE OF SEQUENCE */
|
|
if (nla_get_state(nla) <= NLA_STATE_NEGO_TOKEN && credssp_auth_have_output_token(nla->auth))
|
|
{
|
|
const SecBuffer* buffer = credssp_auth_get_output_buffer(nla->auth);
|
|
|
|
if (!WinPrAsn1EncContextualSeqContainer(enc, 1) || !WinPrAsn1EncSeqContainer(enc))
|
|
goto fail;
|
|
|
|
/* negoToken [0] OCTET STRING */
|
|
if (!nla_write_octet_string(enc, buffer, 0, "negoToken"))
|
|
goto fail;
|
|
|
|
/* End negoTokens (SEQUENCE OF SEQUENCE) */
|
|
if (!WinPrAsn1EncEndContainer(enc) || !WinPrAsn1EncEndContainer(enc))
|
|
goto fail;
|
|
}
|
|
|
|
/* authInfo [2] OCTET STRING */
|
|
if (nla->authInfo.cbBuffer > 0)
|
|
{
|
|
if (!nla_write_octet_string_free(enc, &nla->authInfo, 2, "auth info"))
|
|
goto fail;
|
|
}
|
|
|
|
/* pubKeyAuth [3] OCTET STRING */
|
|
if (nla->pubKeyAuth.cbBuffer > 0)
|
|
{
|
|
if (!nla_write_octet_string_free(enc, &nla->pubKeyAuth, 3, "public key auth"))
|
|
goto fail;
|
|
}
|
|
|
|
/* errorCode [4] INTEGER */
|
|
if (nla->errorCode && nla->peerVersion >= 3 && nla->peerVersion != 5)
|
|
{
|
|
WLog_DBG(TAG, " ----->> error code %s 0x%08" PRIx32, NtStatus2Tag(nla->errorCode),
|
|
nla->errorCode);
|
|
if (!WinPrAsn1EncContextualInteger(enc, 4, nla->errorCode))
|
|
goto fail;
|
|
}
|
|
|
|
/* clientNonce [5] OCTET STRING */
|
|
if (!nla->server && nla->ClientNonce.cbBuffer > 0)
|
|
{
|
|
if (!nla_write_octet_string(enc, &nla->ClientNonce, 5, "client nonce"))
|
|
goto fail;
|
|
}
|
|
|
|
/* End TSRequest */
|
|
if (!WinPrAsn1EncEndContainer(enc))
|
|
goto fail;
|
|
|
|
if (!WinPrAsn1EncStreamSize(enc, &length))
|
|
goto fail;
|
|
|
|
s = Stream_New(NULL, length);
|
|
if (!s)
|
|
goto fail;
|
|
|
|
if (!WinPrAsn1EncToStream(enc, s))
|
|
goto fail;
|
|
|
|
WLog_DBG(TAG, "[%" PRIuz " bytes]", length);
|
|
if (transport_write(nla->transport, s) < 0)
|
|
goto fail;
|
|
rc = TRUE;
|
|
|
|
fail:
|
|
Stream_Free(s, TRUE);
|
|
WinPrAsn1Encoder_Free(&enc);
|
|
return rc;
|
|
}
|
|
|
|
static int nla_decode_ts_request(rdpNla* nla, wStream* s)
|
|
{
|
|
WinPrAsn1Decoder dec = { 0 };
|
|
WinPrAsn1Decoder dec2 = { 0 };
|
|
BOOL error = FALSE;
|
|
WinPrAsn1_tagId tag = { 0 };
|
|
WinPrAsn1_INTEGER val = { 0 };
|
|
UINT32 version = 0;
|
|
|
|
WINPR_ASSERT(nla);
|
|
WINPR_ASSERT(s);
|
|
|
|
WinPrAsn1Decoder_Init(&dec, WINPR_ASN1_DER, s);
|
|
|
|
WLog_DBG(TAG, "<<----- receiving...");
|
|
|
|
/* TSRequest */
|
|
const size_t offset = WinPrAsn1DecReadSequence(&dec, &dec2);
|
|
if (offset == 0)
|
|
return -1;
|
|
dec = dec2;
|
|
|
|
/* version [0] INTEGER */
|
|
if (WinPrAsn1DecReadContextualInteger(&dec, 0, &error, &val) == 0)
|
|
return -1;
|
|
|
|
if (!Stream_SafeSeek(s, offset))
|
|
return -1;
|
|
|
|
version = (UINT)val;
|
|
WLog_DBG(TAG, " <<----- protocol version %" PRIu32, version);
|
|
|
|
if (nla->peerVersion == 0)
|
|
nla->peerVersion = version;
|
|
|
|
/* if the peer suddenly changed its version - kick it */
|
|
if (nla->peerVersion != version)
|
|
{
|
|
WLog_ERR(TAG, "CredSSP peer changed protocol version from %" PRIu32 " to %" PRIu32,
|
|
nla->peerVersion, version);
|
|
return -1;
|
|
}
|
|
|
|
while (WinPrAsn1DecReadContextualTag(&dec, &tag, &dec2) != 0)
|
|
{
|
|
WinPrAsn1Decoder dec3 = { 0 };
|
|
WinPrAsn1_OctetString octet_string = { 0 };
|
|
|
|
switch (tag)
|
|
{
|
|
case 1:
|
|
WLog_DBG(TAG, " <<----- nego token");
|
|
/* negoTokens [1] SEQUENCE OF SEQUENCE */
|
|
if ((WinPrAsn1DecReadSequence(&dec2, &dec3) == 0) ||
|
|
(WinPrAsn1DecReadSequence(&dec3, &dec2) == 0))
|
|
return -1;
|
|
/* negoToken [0] OCTET STRING */
|
|
if ((WinPrAsn1DecReadContextualOctetString(&dec2, 0, &error, &octet_string,
|
|
FALSE) == 0) &&
|
|
error)
|
|
return -1;
|
|
if (!nla_sec_buffer_alloc_from_data(&nla->negoToken, octet_string.data, 0,
|
|
octet_string.len))
|
|
return -1;
|
|
break;
|
|
case 2:
|
|
WLog_DBG(TAG, " <<----- auth info");
|
|
/* authInfo [2] OCTET STRING */
|
|
if (WinPrAsn1DecReadOctetString(&dec2, &octet_string, FALSE) == 0)
|
|
return -1;
|
|
if (!nla_sec_buffer_alloc_from_data(&nla->authInfo, octet_string.data, 0,
|
|
octet_string.len))
|
|
return -1;
|
|
break;
|
|
case 3:
|
|
WLog_DBG(TAG, " <<----- public key auth");
|
|
/* pubKeyAuth [3] OCTET STRING */
|
|
if (WinPrAsn1DecReadOctetString(&dec2, &octet_string, FALSE) == 0)
|
|
return -1;
|
|
if (!nla_sec_buffer_alloc_from_data(&nla->pubKeyAuth, octet_string.data, 0,
|
|
octet_string.len))
|
|
return -1;
|
|
break;
|
|
case 4:
|
|
/* errorCode [4] INTEGER */
|
|
if (WinPrAsn1DecReadInteger(&dec2, &val) == 0)
|
|
return -1;
|
|
nla->errorCode = (UINT)val;
|
|
WLog_DBG(TAG, " <<----- error code %s 0x%08" PRIx32, NtStatus2Tag(nla->errorCode),
|
|
nla->errorCode);
|
|
break;
|
|
case 5:
|
|
WLog_DBG(TAG, " <<----- client nonce");
|
|
/* clientNonce [5] OCTET STRING */
|
|
if (WinPrAsn1DecReadOctetString(&dec2, &octet_string, FALSE) == 0)
|
|
return -1;
|
|
if (!nla_sec_buffer_alloc_from_data(&nla->ClientNonce, octet_string.data, 0,
|
|
octet_string.len))
|
|
return -1;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int nla_recv_pdu(rdpNla* nla, wStream* s)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
WINPR_ASSERT(s);
|
|
|
|
if (nla_get_state(nla) == NLA_STATE_EARLY_USER_AUTH)
|
|
{
|
|
UINT32 code = 0;
|
|
Stream_Read_UINT32(s, code);
|
|
if (code != AUTHZ_SUCCESS)
|
|
{
|
|
WLog_DBG(TAG, "Early User Auth active: FAILURE code 0x%08" PRIX32 "", code);
|
|
code = FREERDP_ERROR_AUTHENTICATION_FAILED;
|
|
freerdp_set_last_error_log(nla->rdpcontext, code);
|
|
return -1;
|
|
}
|
|
else
|
|
WLog_DBG(TAG, "Early User Auth active: SUCCESS");
|
|
}
|
|
else
|
|
{
|
|
if (nla_decode_ts_request(nla, s) < 1)
|
|
return -1;
|
|
|
|
if (nla->errorCode)
|
|
{
|
|
UINT32 code = 0;
|
|
|
|
switch (nla->errorCode)
|
|
{
|
|
case STATUS_PASSWORD_MUST_CHANGE:
|
|
code = FREERDP_ERROR_CONNECT_PASSWORD_MUST_CHANGE;
|
|
break;
|
|
|
|
case STATUS_PASSWORD_EXPIRED:
|
|
code = FREERDP_ERROR_CONNECT_PASSWORD_EXPIRED;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_DISABLED:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_DISABLED;
|
|
break;
|
|
|
|
case STATUS_LOGON_FAILURE:
|
|
code = FREERDP_ERROR_CONNECT_LOGON_FAILURE;
|
|
break;
|
|
|
|
case STATUS_WRONG_PASSWORD:
|
|
code = FREERDP_ERROR_CONNECT_WRONG_PASSWORD;
|
|
break;
|
|
|
|
case STATUS_ACCESS_DENIED:
|
|
code = FREERDP_ERROR_CONNECT_ACCESS_DENIED;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_RESTRICTION:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_RESTRICTION;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_LOCKED_OUT:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_LOCKED_OUT;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_EXPIRED:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_EXPIRED;
|
|
break;
|
|
|
|
case STATUS_LOGON_TYPE_NOT_GRANTED:
|
|
code = FREERDP_ERROR_CONNECT_LOGON_TYPE_NOT_GRANTED;
|
|
break;
|
|
|
|
default:
|
|
WLog_ERR(TAG, "SPNEGO failed with NTSTATUS: %s [0x%08" PRIX32 "]",
|
|
NtStatus2Tag(nla->errorCode), nla->errorCode);
|
|
code = FREERDP_ERROR_AUTHENTICATION_FAILED;
|
|
break;
|
|
}
|
|
|
|
freerdp_set_last_error_log(nla->rdpcontext, code);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return nla_client_recv(nla);
|
|
}
|
|
|
|
int nla_server_recv(rdpNla* nla)
|
|
{
|
|
int status = -1;
|
|
|
|
WINPR_ASSERT(nla);
|
|
|
|
wStream* s = nla_server_recv_stream(nla);
|
|
if (!s)
|
|
goto fail;
|
|
status = nla_decode_ts_request(nla, s);
|
|
|
|
fail:
|
|
Stream_Free(s, TRUE);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Create new CredSSP state machine.
|
|
*
|
|
* @param context A pointer to the rdp context to use
|
|
* @param transport A pointer to the transport to use
|
|
*
|
|
* @return new CredSSP state machine.
|
|
*/
|
|
|
|
rdpNla* nla_new(rdpContext* context, rdpTransport* transport)
|
|
{
|
|
WINPR_ASSERT(transport);
|
|
WINPR_ASSERT(context);
|
|
|
|
rdpSettings* settings = context->settings;
|
|
WINPR_ASSERT(settings);
|
|
|
|
rdpNla* nla = (rdpNla*)calloc(1, sizeof(rdpNla));
|
|
|
|
if (!nla)
|
|
return NULL;
|
|
|
|
nla->rdpcontext = context;
|
|
nla->server = settings->ServerMode;
|
|
nla->transport = transport;
|
|
nla->sendSeqNum = 0;
|
|
nla->recvSeqNum = 0;
|
|
nla->version = 6;
|
|
nla->earlyUserAuth = FALSE;
|
|
|
|
nla->identity = calloc(1, sizeof(SEC_WINNT_AUTH_IDENTITY));
|
|
if (!nla->identity)
|
|
goto cleanup;
|
|
|
|
nla->auth = credssp_auth_new(context);
|
|
if (!nla->auth)
|
|
goto cleanup;
|
|
|
|
/* init to 0 or we end up freeing a bad pointer if the alloc fails */
|
|
if (!nla_sec_buffer_alloc(&nla->ClientNonce, NonceLength))
|
|
goto cleanup;
|
|
|
|
/* generate random 32-byte nonce */
|
|
if (winpr_RAND(nla->ClientNonce.pvBuffer, NonceLength) < 0)
|
|
goto cleanup;
|
|
|
|
return nla;
|
|
cleanup:
|
|
WINPR_PRAGMA_DIAG_PUSH
|
|
WINPR_PRAGMA_DIAG_IGNORED_MISMATCHED_DEALLOC
|
|
nla_free(nla);
|
|
WINPR_PRAGMA_DIAG_POP
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Free CredSSP state machine.
|
|
* @param nla The NLA instance to free
|
|
*/
|
|
|
|
void nla_free(rdpNla* nla)
|
|
{
|
|
if (!nla)
|
|
return;
|
|
|
|
smartcardCertInfo_Free(nla->smartcardCert);
|
|
nla_buffer_free(nla);
|
|
sspi_SecBufferFree(&nla->tsCredentials);
|
|
credssp_auth_free(nla->auth);
|
|
|
|
sspi_FreeAuthIdentity(nla->identity);
|
|
free(nla->pkinitArgs);
|
|
free(nla->identity);
|
|
free(nla);
|
|
}
|
|
|
|
SEC_WINNT_AUTH_IDENTITY* nla_get_identity(rdpNla* nla)
|
|
{
|
|
if (!nla)
|
|
return NULL;
|
|
|
|
return nla->identity;
|
|
}
|
|
|
|
NLA_STATE nla_get_state(rdpNla* nla)
|
|
{
|
|
if (!nla)
|
|
return NLA_STATE_FINAL;
|
|
|
|
return nla->state;
|
|
}
|
|
|
|
BOOL nla_set_state(rdpNla* nla, NLA_STATE state)
|
|
{
|
|
if (!nla)
|
|
return FALSE;
|
|
|
|
WLog_DBG(TAG, "-- %s\t--> %s", nla_get_state_str(nla->state), nla_get_state_str(state));
|
|
nla->state = state;
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL nla_set_service_principal(rdpNla* nla, const char* service, const char* hostname)
|
|
{
|
|
if (!credssp_auth_set_spn(nla->auth, service, hostname))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL nla_impersonate(rdpNla* nla)
|
|
{
|
|
return credssp_auth_impersonate(nla->auth);
|
|
}
|
|
|
|
BOOL nla_revert_to_self(rdpNla* nla)
|
|
{
|
|
return credssp_auth_revert_to_self(nla->auth);
|
|
}
|
|
|
|
const char* nla_get_state_str(NLA_STATE state)
|
|
{
|
|
switch (state)
|
|
{
|
|
case NLA_STATE_INITIAL:
|
|
return "NLA_STATE_INITIAL";
|
|
case NLA_STATE_NEGO_TOKEN:
|
|
return "NLA_STATE_NEGO_TOKEN";
|
|
case NLA_STATE_PUB_KEY_AUTH:
|
|
return "NLA_STATE_PUB_KEY_AUTH";
|
|
case NLA_STATE_AUTH_INFO:
|
|
return "NLA_STATE_AUTH_INFO";
|
|
case NLA_STATE_POST_NEGO:
|
|
return "NLA_STATE_POST_NEGO";
|
|
case NLA_STATE_EARLY_USER_AUTH:
|
|
return "NLA_STATE_EARLY_USER_AUTH";
|
|
case NLA_STATE_FINAL:
|
|
return "NLA_STATE_FINAL";
|
|
default:
|
|
return "UNKNOWN";
|
|
}
|
|
}
|
|
|
|
DWORD nla_get_error(rdpNla* nla)
|
|
{
|
|
if (!nla)
|
|
return ERROR_INTERNAL_ERROR;
|
|
return nla->errorCode;
|
|
}
|
|
|
|
UINT32 nla_get_sspi_error(rdpNla* nla)
|
|
{
|
|
WINPR_ASSERT(nla);
|
|
return credssp_auth_sspi_error(nla->auth);
|
|
}
|