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Merge pull request #3250 from mfleisz/cssp_v3

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core: Add support for CredSSP version 3
This commit is contained in:
akallabeth 2016-04-26 09:59:40 +02:00
commit a62d962bc7
4 changed files with 102 additions and 28 deletions
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107
libfreerdp/core/nla.c
View File

@ -5,6 +5,7 @@
* Copyright 2010-2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2015 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
* Copyright 2016 Martin Fleisz <martin.fleisz@thincast.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -54,7 +55,8 @@
* version [0] INTEGER,
* negoTokens [1] NegoData OPTIONAL,
* authInfo [2] OCTET STRING OPTIONAL,
* pubKeyAuth [3] OCTET STRING OPTIONAL
* pubKeyAuth [3] OCTET STRING OPTIONAL,
* errorCode [4] INTEGER OPTIONAL
* }
*
* NegoData ::= SEQUENCE OF NegoDataItem
@ -548,7 +550,10 @@ int nla_client_authenticate(rdpNla* nla)
}
if (nla_client_begin(nla) < 1)
{
Stream_Free(s, TRUE);
return -1;
}
while (nla->state < NLA_STATE_AUTH_INFO)
{
@ -566,7 +571,10 @@ int nla_client_authenticate(rdpNla* nla)
status = nla_recv_pdu(nla, s);
if (status < 0)
{
Stream_Free(s, TRUE);
return -1;
}
}
Stream_Free(s, TRUE);
@ -780,8 +788,28 @@ int nla_server_authenticate(rdpNla* nla)
if ((nla->status != SEC_E_OK) && (nla->status != SEC_I_CONTINUE_NEEDED))
{
/* 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;
}
WLog_ERR(TAG, "AcceptSecurityContext status %s [%08X]",
GetSecurityStatusString(nla->status), nla->status);
nla_send(nla);
return -1; /* Access Denied */
}
@ -1381,14 +1409,24 @@ BOOL nla_send(rdpNla* nla)
wStream* s;
int length;
int ts_request_length;
int nego_tokens_length;
int pub_key_auth_length;
int auth_info_length;
int nego_tokens_length = 0;
int pub_key_auth_length = 0;
int auth_info_length = 0;
int error_code_context_length = 0;
int error_code_length = 0;
nego_tokens_length = (nla->negoToken.cbBuffer > 0) ? nla_sizeof_nego_tokens(nla->negoToken.cbBuffer) : 0;
pub_key_auth_length = (nla->pubKeyAuth.cbBuffer > 0) ? nla_sizeof_pub_key_auth(nla->pubKeyAuth.cbBuffer) : 0;
auth_info_length = (nla->authInfo.cbBuffer > 0) ? nla_sizeof_auth_info(nla->authInfo.cbBuffer) : 0;
length = nego_tokens_length + pub_key_auth_length + auth_info_length;
if (nla->version < 3 || nla->errorCode == 0)
{
nego_tokens_length = (nla->negoToken.cbBuffer > 0) ? nla_sizeof_nego_tokens(nla->negoToken.cbBuffer) : 0;
pub_key_auth_length = (nla->pubKeyAuth.cbBuffer > 0) ? nla_sizeof_pub_key_auth(nla->pubKeyAuth.cbBuffer) : 0;
auth_info_length = (nla->authInfo.cbBuffer > 0) ? nla_sizeof_auth_info(nla->authInfo.cbBuffer) : 0;
}
else
{
error_code_length = ber_sizeof_integer(nla->errorCode);
error_code_context_length = ber_sizeof_contextual_tag(error_code_length);
}
length = nego_tokens_length + pub_key_auth_length + auth_info_length + error_code_context_length + error_code_length;
ts_request_length = nla_sizeof_ts_request(length);
s = Stream_New(NULL, ber_sizeof_sequence(ts_request_length));
@ -1404,7 +1442,7 @@ BOOL nla_send(rdpNla* nla)
ber_write_sequence_tag(s, ts_request_length); /* SEQUENCE */
/* [0] version */
ber_write_contextual_tag(s, 0, 3, TRUE);
ber_write_integer(s, 2); /* INTEGER */
ber_write_integer(s, nla->version); /* INTEGER */
/* [1] negoTokens (NegoData) */
if (nego_tokens_length > 0)
@ -1430,6 +1468,13 @@ BOOL nla_send(rdpNla* nla)
length -= ber_write_sequence_octet_string(s, 3, nla->pubKeyAuth.pvBuffer, nla->pubKeyAuth.cbBuffer);
}
/* [4] errorCode (INTEGER) */
if (error_code_length > 0)
{
ber_write_contextual_tag(s, 4, error_code_length, TRUE);
ber_write_integer(s, nla->errorCode);
}
Stream_SealLength(s);
transport_write(nla->transport, s);
Stream_Free(s, TRUE);
@ -1439,14 +1484,12 @@ BOOL nla_send(rdpNla* nla)
int nla_decode_ts_request(rdpNla* nla, wStream* s)
{
int length;
UINT32 version;
/* TSRequest */
if (!ber_read_sequence_tag(s, &length) ||
!ber_read_contextual_tag(s, 0, &length, TRUE) ||
!ber_read_integer(s, &version))
!ber_read_integer(s, &nla->version))
{
Stream_Free(s, TRUE);
return -1;
}
@ -1459,15 +1502,12 @@ int nla_decode_ts_request(rdpNla* nla, wStream* s)
!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
((int) Stream_GetRemainingLength(s)) < length)
{
Stream_Free(s, TRUE);
return -1;
}
if (!sspi_SecBufferAlloc(&nla->negoToken, length))
{
Stream_Free(s, TRUE);
return -1;
}
Stream_Read(s, nla->negoToken.pvBuffer, length);
nla->negoToken.cbBuffer = length;
}
@ -1477,16 +1517,11 @@ int nla_decode_ts_request(rdpNla* nla, wStream* s)
{
if (!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
((int) Stream_GetRemainingLength(s)) < length)
{
Stream_Free(s, TRUE);
return -1;
}
if (!sspi_SecBufferAlloc(&nla->authInfo, length))
{
Stream_Free(s, TRUE);
return -1;
}
Stream_Read(s, nla->authInfo.pvBuffer, length);
nla->authInfo.cbBuffer = length;
}
@ -1496,20 +1531,25 @@ int nla_decode_ts_request(rdpNla* nla, wStream* s)
{
if (!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
((int) Stream_GetRemainingLength(s)) < length)
{
Stream_Free(s, TRUE);
return -1;
}
if (!sspi_SecBufferAlloc(&nla->pubKeyAuth, length))
{
Stream_Free(s, TRUE);
return -1;
}
Stream_Read(s, nla->pubKeyAuth.pvBuffer, length);
nla->pubKeyAuth.cbBuffer = length;
}
/* [4] errorCode (INTEGER) */
if (nla->version >= 3)
{
if (ber_read_contextual_tag(s, 4, &length, TRUE) != FALSE)
{
if (!ber_read_integer(s, &nla->errorCode))
return -1;
}
}
return 1;
}
@ -1518,6 +1558,13 @@ int nla_recv_pdu(rdpNla* nla, wStream* s)
if (nla_decode_ts_request(nla, s) < 1)
return -1;
if (nla->errorCode)
{
WLog_ERR(TAG, "SPNEGO failed with NTSTATUS: %08X", nla->errorCode);
freerdp_set_last_error(nla->instance->context, nla->errorCode);
return -1;
}
if (nla_client_recv(nla) < 1)
return -1;
@ -1547,7 +1594,10 @@ int nla_recv(rdpNla* nla)
}
if (nla_decode_ts_request(nla, s) < 1)
{
Stream_Free(s, TRUE);
return -1;
}
Stream_Free(s, TRUE);
return 1;
@ -1667,6 +1717,7 @@ rdpNla* nla_new(freerdp* instance, rdpTransport* transport, rdpSettings* setting
nla->transport = transport;
nla->sendSeqNum = 0;
nla->recvSeqNum = 0;
nla->version = 3;
ZeroMemory(&nla->negoToken, sizeof(SecBuffer));
ZeroMemory(&nla->pubKeyAuth, sizeof(SecBuffer));

2
libfreerdp/core/nla.h
View File

@ -58,6 +58,8 @@ struct rdp_nla
rdpSettings* settings;
rdpTransport* transport;
UINT32 cbMaxToken;
UINT32 version;
UINT32 errorCode;
ULONG fContextReq;
ULONG pfContextAttr;
BOOL haveContext;

13
libfreerdp/crypto/ber.c
View File

@ -451,6 +451,14 @@ int ber_write_integer(wStream* s, UINT32 value)
Stream_Write_UINT32_BE(s, value);
return 6;
}
else
{
/* treat as signed integer i.e. NT/HRESULT error codes */
ber_write_universal_tag(s, BER_TAG_INTEGER, FALSE);
ber_write_length(s, 4);
Stream_Write_UINT32_BE(s, value);
return 6;
}
return 0;
}
@ -473,6 +481,11 @@ int ber_sizeof_integer(UINT32 value)
{
return 6;
}
else
{
/* treat as signed integer i.e. NT/HRESULT error codes */
return 6;
}
return 0;
}

8
winpr/include/winpr/nt.h
View File

@ -1270,6 +1270,14 @@
/* Defined in winternl.h, always define since we do not include this header */
/* defined in ntstatus.h */
#if !defined(NTSTATUS_FROM_WIN32) && !defined(INLINE_NTSTATUS_FROM_WIN32)
static INLINE NTSTATUS NTSTATUS_FROM_WIN32(long x)
{
return x <= 0 ? (NTSTATUS)x : (NTSTATUS) (((x) & 0x0000FFFF) | (0x7 << 16) | 0xC0000000);
}
#endif
#ifdef _WIN32
/**