Skip to content

Commit

Permalink
Remove Licensing exchange
Browse files Browse the repository at this point in the history 
Replaces the existing licensing eschange with a single PDU
saying the user will not issue a license.
  • Loading branch information
@matt335672
matt335672 committed Jul 2, 2024
1 parent fced000 commit 154fa39
Showing 1 changed file with 3 additions and 257 deletions.
260 changes: 3 additions & 257 deletions libxrdp/xrdp_sec.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -44,170 +44,6 @@ static tui8 g_pad_92[48] =
};


/*****************************************************************************/
/* Licensing request v2 PDU
*
* [MS-RDPBCGR] TS_SECURITY_HEADER - Basic
* [MS-RDPELE] SERVER_LICENSE_REQUEST with PREAMBLE_VERSION_2_0
*/
/* some compilers need unsigned char to avoid warnings */
static tui8 g_lic1[322] =
{
/* [MS-RDPBCGR] TS_SECURITY_HEADER - Basic
* flags (2) = 0x0080 (SEC_LICENSE_PKT)
* flagsHi (2) = unused (arbitrary data)
* [MS-RDPBCGR] LICENSE_PREAMBLE
* bMsgType (1) = 0x01 (LICENSE_REQUEST)
* flags (1) = 0x02 (PREAMBLE_VERSION_2_0)
* wMsgSize (2) = 318 (excludes the 4 bytes TS_SECURITY_HEADER Basic)
*/
0x80, 0x00, 0x3e, 0x01, 0x01, 0x02, 0x3e, 0x01,
/* [MS-RDPELE] SERVER_LICENSE_REQUEST
* ServerRandom (32) = <see hex below>
*/
0x7b, 0x3c, 0x31, 0xa6, 0xae, 0xe8, 0x74, 0xf6,
0xb4, 0xa5, 0x03, 0x90, 0xe7, 0xc2, 0xc7, 0x39,
0xba, 0x53, 0x1c, 0x30, 0x54, 0x6e, 0x90, 0x05,
0xd0, 0x05, 0xce, 0x44, 0x18, 0x91, 0x83, 0x81,
/* [MS-RDPELE] SERVER_LICENSE_REQUEST - ProductInfo
* [MS-RDPELE] PRODUCT_INFO
* dwVersion (4) = 0x00040000
* cbCompanyName (4) = 0x0000002c (44)
*/
0x00, 0x00, 0x04, 0x00, 0x2c, 0x00, 0x00, 0x00,
/*
* pbCompanyName (44) = UTF-16("Microsoft Corporation")
* cbProductId (4) = 0x00000008 (8)
*/
0x4d, 0x00, 0x69, 0x00, 0x63, 0x00, 0x72, 0x00,
0x6f, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x66, 0x00,
0x74, 0x00, 0x20, 0x00, 0x43, 0x00, 0x6f, 0x00,
0x72, 0x00, 0x70, 0x00, 0x6f, 0x00, 0x72, 0x00,
0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x6f, 0x00,
0x6e, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
/*
* pbProductId (8) = UTF-16("236")
*/
0x32, 0x00, 0x33, 0x00, 0x36, 0x00, 0x00, 0x00,
/* [MS-RDPELE] SERVER_LICENSE_REQUEST - KeyExchangeList
* [MS-RDPBCGR] LICENSE_BINARY_BLOB
* wBlobType (2) = 0x000d (BB_KEY_EXCHG_ALG_BLOB)
* wBlobLen (2) = 0x0004 (4)
* blobData (4) = 0x00000001 (KEY_EXCHANGE_ALG_RSA)
*/
0x0d, 0x00, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00,
/* [MS-RDPELE] SERVER_LICENSE_REQUEST - ServerCertificate
* [MS-RDPBCGR] LICENSE_BINARY_BLOB
* wBlobType (2) = BB_CERTIFICATE_BLOB (0x0003)
* wBlobLen (2) = 0x00b8 (184)
* blobData = <SERVER_CERTIFICATE>
*
* [MS-RDPBCGR] SERVER_CERTIFICATE
* dwVersion (31 bits) = 0x00000001 (CERT_CHAIN_VERSION_1)
* t (1 bit) = 0 (temporary certificate)
*/
0x03, 0x00, 0xb8, 0x00, 0x01, 0x00, 0x00, 0x00,
/*
* certData = <PROPRIETARYSERVERCERTIFICATE>
*
* [MS-RDPBCGR] PROPRIETARYSERVERCERTIFICATE
* dwSigAlgId (4) = 0x00000001 (SIGNATURE_ALG_RSA)
* dwKeyAlgId (4) = 0x00000001 (KEY_EXCHANGE_ALG_RSA)
* wPublicKeyBlobType (2) = 0x0006 (BB_RSA_KEY_BLOB)
* wPublicKeyBlobLen (2) = 0x005c (92)
* PublicKeyBlob = <RSA_PUBLIC_KEY>
*
* [MS-RDPBCGR] RSA_PUBLIC_KEY
* magic (4) = 0x31415352
* keylen (4) = 0x00000048 (72)
* bitlen (4) = 0x00000200 (512)
* datalen (4) = 0x0000003f (63)
* pubExp (4) = 0x00010001 (65537)
*/
0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x06, 0x00, 0x5c, 0x00, 0x52, 0x53, 0x41, 0x31,
0x48, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
0x3f, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00,
/*
* modulus (72) = <see hex below>
*/
0x01, 0xc7, 0xc9, 0xf7, 0x8e, 0x5a, 0x38, 0xe4,
0x29, 0xc3, 0x00, 0x95, 0x2d, 0xdd, 0x4c, 0x3e,
0x50, 0x45, 0x0b, 0x0d, 0x9e, 0x2a, 0x5d, 0x18,
0x63, 0x64, 0xc4, 0x2c, 0xf7, 0x8f, 0x29, 0xd5,
0x3f, 0xc5, 0x35, 0x22, 0x34, 0xff, 0xad, 0x3a,
0xe6, 0xe3, 0x95, 0x06, 0xae, 0x55, 0x82, 0xe3,
0xc8, 0xc7, 0xb4, 0xa8, 0x47, 0xc8, 0x50, 0x71,
0x74, 0x29, 0x53, 0x89, 0x6d, 0x9c, 0xed, 0x70,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* [MS-RDPELE] SERVER_LICENSE_REQUEST - ServerCertificate
* [MS-RDPBCGR] LICENSE_BINARY_BLOB - blobData
* [MS-RDPBCGR] SERVER_CERTIFICATE - certData
* [MS-RDPBCGR] PROPRIETARYSERVERCERTIFICATE
* wSignatureBlobType (2) = 0x0008 (BB_RSA_SIGNATURE_BLOB)
* wSignatureBlobLen (2) = 0x0048 (72)
* SignatureBlob (72) = <see hex below, calculated using [MS-RDPBCGR] 5.3.3.1.2>
*/
0x08, 0x00, 0x48, 0x00, 0xa8, 0xf4, 0x31, 0xb9,
0xab, 0x4b, 0xe6, 0xb4, 0xf4, 0x39, 0x89, 0xd6,
0xb1, 0xda, 0xf6, 0x1e, 0xec, 0xb1, 0xf0, 0x54,
0x3b, 0x5e, 0x3e, 0x6a, 0x71, 0xb4, 0xf7, 0x75,
0xc8, 0x16, 0x2f, 0x24, 0x00, 0xde, 0xe9, 0x82,
0x99, 0x5f, 0x33, 0x0b, 0xa9, 0xa6, 0x94, 0xaf,
0xcb, 0x11, 0xc3, 0xf2, 0xdb, 0x09, 0x42, 0x68,
0x29, 0x56, 0x58, 0x01, 0x56, 0xdb, 0x59, 0x03,
0x69, 0xdb, 0x7d, 0x37, 0x00, 0x00, 0x00, 0x00,
/* <last 4 bytes of SignatureBlob>
*
* [MS-RDPELE] SERVER_LICENSE_REQUEST - ScopeList
* [MS-RDPELE] SCOPE_LIST
* ScopeCount (4) = 0x00000001 (1)
* ScopeArray = <LICENSE_BINARY_BLOB>
*
* [MS-RDPBCGR] LICENSE_BINARY_BLOB
* wBlobType (2) = 0x000e (BB_SCOPE_BLOB)
* wBlobLen (2) = 0x000e (14)
* blobData (14) = ISO-8859-1("microsoft.com")
*/
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x0e, 0x00, 0x0e, 0x00, 0x6d, 0x69, 0x63, 0x72,
0x6f, 0x73, 0x6f, 0x66, 0x74, 0x2e, 0x63, 0x6f,
0x6d, 0x00
};

/*****************************************************************************/
/* Licensing success response v2 PDU
*
* [MS-RDPBCGR] TS_SECURITY_HEADER - Basic
* [MS-RDPELE] LICENSE_ERROR_MESSAGE with STATUS_VALID_CLIENT
*/
/* some compilers need unsigned char to avoid warnings */
static tui8 g_lic2[20] =
{
/* [MS-RDPBCGR] TS_SECURITY_HEADER - Basic
* flags (2) = 0x0080 (SEC_LICENSE_PKT)
* flagsHi (2) = unused (arbitrary data)
* [MS-RDPBCGR] LICENSE_PREAMBLE
* bMsgType (1) = 0xff (ERROR_ALERT)
* flags (1) = 0x02 (PREAMBLE_VERSION_2_0)
* wMsgSize (2) = 0x10 (16, excludes the 4 bytes TS_SECURITY_HEADER Basic)
*/
0x80, 0x00, 0x10, 0x00, 0xff, 0x02, 0x10, 0x00,
/*
* [MS-RDPBCGR] LICENSE_ERROR_MESSAGE
* dwErrorCode (4) = 0x00000007 (STATUS_VALID_CLIENT)
* dwStateTransition (4) = 0x00000002 (ST_NO_TRANSITION)
* bbErrorInfo = <LICENSE_BINARY_BLOB>
*/
0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
/*
* [MS-RDPBCGR] LICENSE_BINARY_BLOB
* wBlobType (2) = 0x1428 <ignored by client> (should be 0x0004 BB_ERROR_BLOB)
* wBlobLen (2) = 0x0000 (0)
*/
0x28, 0x14, 0x00, 0x00
};

/*****************************************************************************/
/* Licensing success response v3 PDU
*
Expand Down Expand Up @@ -238,10 +74,10 @@ static tui8 g_lic3[20] =
0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
/*
* [MS-RDPBCGR] LICENSE_BINARY_BLOB
* wBlobType (2) = 0x99f3 <ignored by client> (should be 0x0004 BB_ERROR_BLOB)
* wBlobType (2) = 0x0004 (BB_ERROR_BLOB)
* wBlobLen (2) = 0x0000 (0)
*/
0xf3, 0x99, 0x00, 0x00
0x04, 0x00, 0x00, 0x00
};

static const tui8 g_fips_reverse_table[256] =
Expand Down Expand Up @@ -1159,39 +995,6 @@ xrdp_sec_process_logon_info(struct xrdp_sec *self, struct stream *s)
return 0;
}

/*****************************************************************************/
/* returns error */
static int
xrdp_sec_send_lic_initial(struct xrdp_sec *self)
{
struct stream *s;


make_stream(s);
init_stream(s, 8192);

if (xrdp_mcs_init(self->mcs_layer, s) != 0)
{
LOG(LOG_LEVEL_ERROR, "xrdp_sec_send_lic_initial: xrdp_mcs_init failed");
free_stream(s);
return 1;
}

out_uint8a(s, g_lic1, sizeof(g_lic1));
s_mark_end(s);

LOG_DEVEL(LOG_LEVEL_TRACE, "Sending [MS-RDPELE] SERVER_LICENSE_REQUEST");
if (xrdp_mcs_send(self->mcs_layer, s, MCS_GLOBAL_CHANNEL) != 0)
{
LOG(LOG_LEVEL_ERROR, "Sending [MS-RDPELE] SERVER_LICENSE_REQUEST failed");
free_stream(s);
return 1;
}

free_stream(s);
return 0;
}

/*****************************************************************************/
/*
* Send a [MS-RDPELE] LICENSE_ERROR_MESSAGE with STATUS_VALID_CLIENT
Expand All @@ -1213,38 +1016,6 @@ xrdp_sec_send_lic_response(struct xrdp_sec *self)
return 1;
}

out_uint8a(s, g_lic2, sizeof(g_lic2));
s_mark_end(s);

LOG_DEVEL(LOG_LEVEL_TRACE, "Sending [MS-RDPELE] LICENSE_ERROR_MESSAGE with STATUS_VALID_CLIENT");
if (xrdp_mcs_send(self->mcs_layer, s, MCS_GLOBAL_CHANNEL) != 0)
{
LOG(LOG_LEVEL_ERROR, "Sending [MS-RDPELE] LICENSE_ERROR_MESSAGE with STATUS_VALID_CLIENT failed");
free_stream(s);
return 1;
}

free_stream(s);
return 0;
}

/*****************************************************************************/
/* returns error */
static int
xrdp_sec_send_media_lic_response(struct xrdp_sec *self)
{
struct stream *s;

make_stream(s);
init_stream(s, 8192);

if (xrdp_mcs_init(self->mcs_layer, s) != 0)
{
LOG(LOG_LEVEL_ERROR, "xrdp_sec_send_media_lic_response: xrdp_mcs_init failed");
free_stream(s);
return 1;
}

out_uint8a(s, g_lic3, sizeof(g_lic3));
s_mark_end(s);

Expand Down Expand Up @@ -1667,34 +1438,9 @@ xrdp_sec_recv(struct xrdp_sec *self, struct stream *s, int *chan)
return 1;
}

if (self->rdp_layer->client_info.is_mce)
{
if (xrdp_sec_send_media_lic_response(self) != 0)
{
LOG(LOG_LEVEL_ERROR, "xrdp_sec_recv: xrdp_sec_send_media_lic_response failed");
return 1;
}

LOG_DEVEL(LOG_LEVEL_DEBUG, "xrdp_sec_recv: out 'send demand active'");
return -1; /* special error that means send demand active */
}

if (xrdp_sec_send_lic_initial(self) != 0)
{
LOG(LOG_LEVEL_ERROR, "xrdp_sec_recv: xrdp_sec_send_lic_initial failed");
return 1;
}

*chan = 1; /* just set a non existing channel and exit */
LOG_DEVEL(LOG_LEVEL_DEBUG, "xrdp_sec_recv: out channel 1 (non-existing channel)");
return 0;
}

if (flags & SEC_LICENCE_NEG) /* 0x80 SEC_LICENSE_PKT */
{
if (xrdp_sec_send_lic_response(self) != 0)
{
LOG(LOG_LEVEL_ERROR, "xrdp_sec_recv: xrdp_sec_send_lic_response failed");
LOG(LOG_LEVEL_ERROR, "xrdp_sec_recv: xrdp_sec_send_media_lic_response failed");
return 1;
}

Expand Down

0 comments on commit 154fa39

Please sign in to comment.