X-Git-Url: https://git.sesse.net/?p=rdpsrv;a=blobdiff_plain;f=mcs.c;h=4190e49772d297ffd49ddd299645e82f6b22cae7;hp=5f4fe2001b0e176ac62743185c203a3b428cea41;hb=2d51356d04b722522a52a94594f3fd87632a02ec;hpb=7772d71ffd742cfc9b7ff214659d16c5bb56a391

diff --git a/mcs.c b/mcs.c
index 5f4fe20..4190e49 100644
--- a/mcs.c
+++ b/mcs.c
@@ -89,6 +89,13 @@ ber_out_integer(STREAM s, int value)
 	out_uint16_be(s, value);
 }
 
+static void
+ber_out_uint8(STREAM s, uint8 value)
+{
+	ber_out_header(s, BER_TAG_INTEGER, 1);
+	out_uint8(s, value);
+}
+
 static void
 ber_in_integer(STREAM s, int *value)
 {
@@ -101,15 +108,18 @@ ber_in_integer(STREAM s, int *value)
 static void
 mcs_out_domain_params(STREAM s, int max_channels, int max_users, int max_tokens, int max_pdusize)
 {
-	ber_out_header(s, MCS_TAG_DOMAIN_PARAMS, 32);
-	ber_out_integer(s, max_channels);
-	ber_out_integer(s, max_users);
-	ber_out_integer(s, max_tokens);
-	ber_out_integer(s, 1);	/* num_priorities */
-	ber_out_integer(s, 0);	/* min_throughput */
-	ber_out_integer(s, 1);	/* max_height */
-	ber_out_integer(s, max_pdusize);
-	ber_out_integer(s, 2);	/* ver_protocol */
+	ber_out_header(s, MCS_TAG_DOMAIN_PARAMS, 26);
+	ber_out_uint8(s, 34); // max_channels
+	ber_out_uint8(s, 3);  // max_users
+	ber_out_uint8(s, 0);  // max_tokens
+	ber_out_uint8(s, 1);  // num_priorities 
+	ber_out_uint8(s, 0);  // min_throughput
+	ber_out_uint8(s, 1);  // max_height
+	ber_out_header(s, BER_TAG_INTEGER, 3); // pdu size
+	out_uint8(s, 0x00);
+	out_uint8(s, 0xff);
+	out_uint8(s, 0xf8);
+	ber_out_uint8(s, 2);  // ver_protocol
 }
 
 /* Parse a DOMAIN_PARAMS structure (ASN.1 BER) */
@@ -183,41 +193,139 @@ mcs_recv_connect_initial()
 	return s_check_end(s);
 }
 
+/* key generated with "openssl genrsa 512 | openssl rsa -text":
+ 
+modulus:
+    00:b1:e0:36:2f:fd:dd:8b:d6:64:e9:2b:14:f8:b9:
+    0b:ba:3b:b7:0a:f1:f3:97:56:93:38:01:2f:d1:31:
+    2d:70:59:de:97:6a:61:3f:cb:a4:b4:12:05:89:14:
+    d9:b0:8a:70:03:b6:f1:ad:c5:b9:19:9b:b9:8f:03:
+    51:bf:fe:f8:e5
+publicExponent: 65537 (0x10001)
+privateExponent:
+    00:a4:86:68:58:97:8d:f6:2c:06:06:8d:ac:c6:2a:
+    12:a8:dd:56:ff:2e:b0:4b:08:ee:fe:dc:4a:28:4a:
+    3e:67:2d:8e:08:6b:5f:87:69:a4:c5:a0:e7:50:1a:
+    f0:71:03:46:f2:52:7c:e6:09:40:40:61:51:76:32:
+    f8:28:72:99:41
+prime1:
+    00:db:46:d9:34:10:ce:0d:f6:f7:48:30:0f:2b:f6:
+    4d:66:40:27:00:97:db:48:77:cd:96:b5:a6:51:81:
+    a1:7c:ad
+prime2:
+    00:cf:aa:5c:d3:8a:0d:d4:91:a6:40:92:ff:2c:31:
+    d6:f9:08:8d:e8:d2:a8:2f:89:a6:88:2c:61:68:8e:
+    ee:7c:19
+*/
+unsigned char my_modulus[SEC_MODULUS_SIZE] = {
+	0xe5, 0xf8, 0xfe, 0xbf, 0x51,
+	0x03, 0x8f, 0xb9, 0x9b, 0x19, 0xb9, 0xc5, 0xad, 0xf1, 0xb6, 0x03, 0x70, 0x8a, 0xb0, 0xd9,
+	0x14, 0x89, 0x05, 0x12, 0xb4, 0xa4, 0xcb, 0x3f, 0x61, 0x6a, 0x97, 0xde, 0x59, 0x70, 0x2d,
+	0x31, 0xd1, 0x2f, 0x01, 0x38, 0x93, 0x56, 0x97, 0xf3, 0xf1, 0x0a, 0xb7, 0x3b, 0xba, 0x0b,
+	0xb9, 0xf8, 0x14, 0x2b, 0xe9, 0x64, 0xd6, 0x8b, 0xdd, 0xfd, 0x2f, 0x36, 0xe0, 0xb1
+};
+unsigned char my_exponent[SEC_EXPONENT_SIZE] = {
+	0x01, 0x00, 0x01, 0x00
+};
+unsigned char my_private_exponent[] = {
+	0x41, 0x99, 0x72, 0x28, 0xf8,
+	0x32, 0x76, 0x51, 0x61, 0x40, 0x40, 0x09, 0xe6, 0x7c, 0x52, 0xf2, 0x46, 0x03, 0x71, 0xf0,
+	0x1a, 0x50, 0xe7, 0xa0, 0xc5, 0xa4, 0x69, 0x87, 0x5f, 0x6b, 0x08, 0x8e, 0x2d, 0x67, 0x3e,
+	0x4a, 0x28, 0x4a, 0xdc, 0xfe, 0xee, 0x08, 0x4b, 0xb0, 0x2e, 0xff, 0x56, 0xdd, 0xa8, 0x12,
+	0x2a, 0xc6, 0xac, 0x8d, 0x06, 0x06, 0x2c, 0xf6, 0x8d, 0x97, 0x58, 0x68, 0x86, 0xa4
+};
+
+ 
 void
 mcs_send_connect_response()
 {
 	STREAM s;
-	int i;
+	int i, length;
 
-	s = iso_init(92);
+	s = iso_init(250);
+	printf("INITLEN: %u\n", s->p - s->iso_hdr);
 
-	ber_out_header(s, MCS_CONNECT_RESPONSE, 80);
+	ber_out_header(s, MCS_CONNECT_RESPONSE, 245);
 	ber_out_header(s, BER_TAG_RESULT, 1);
 	out_uint8(s, 0);
 
 	ber_out_header(s, BER_TAG_INTEGER, 1);
-	out_uint8(s, 1);  // connect id
+	out_uint8(s, 0);  // connect id
 	
 	mcs_out_domain_params(s, 34, 2, 0, 0xffff);  // dumdidum?
 
-	ber_out_header(s, BER_TAG_OCTET_STRING, 40);
-
-	out_uint8s(s, 21);   // ick
-	out_uint8(s, 0);
+	ber_out_header(s, BER_TAG_OCTET_STRING, 207);
+
+	// some unknown header of sorts
+	out_uint8(s, 0x00);
+	out_uint8(s, 0x05);
+	out_uint8(s, 0x00);
+	out_uint8(s, 0x14);
+	out_uint8(s, 0x7c);
+	out_uint8(s, 0x00);
+	out_uint8(s, 0x01);
+	out_uint8(s, 0x2a);
+	out_uint8(s, 0x14);
+	out_uint8(s, 0x76);
+	out_uint8(s, 0x0a); 
+	out_uint8(s, 0x01);
+	out_uint8(s, 0x01);
+	out_uint8(s, 0x00);
+	out_uint8(s, 0x01);
+	out_uint8(s, 0xc0);
+	out_uint8(s, 0x00);
+	out_uint8(s, 0x4d);
+	out_uint8(s, 0x63);
+	out_uint8(s, 0x44);
+	out_uint8(s, 0x6e);
+
+	length = 184;
+	
+	// two bytes of length
+	out_uint8(s, 0x80 | (length >> 7));
+	out_uint8(s, length & 0x7f);
 
 	// server info -- we claim to support RDP5
 	out_uint16_le(s, SEC_TAG_SRV_INFO);
-	out_uint16_le(s, 6);  // length
-	out_uint16_le(s, 5);
-
+	out_uint16_le(s, 8);  // length
+	out_uint16_le(s, 4);  // version
+	out_uint16_le(s, 8);  // unknown
+
+	// channel info -- open a few channels
+	out_uint16_le(s, SEC_TAG_SRV_CHANNELS);
+	out_uint16_le(s, 16); // length
+	out_uint16_le(s, 1003);
+	out_uint16_le(s, 3);
+	out_uint16_le(s, 1004);
+	out_uint16_le(s, 1005);
+	out_uint16_le(s, 1006);
+	out_uint16_le(s, 0);
+	
 	// crypto info
 	out_uint16_le(s, SEC_TAG_SRV_CRYPT);
-	out_uint16_le(s, 12); // length
-	out_uint32_le(s, 1); // 40-bit
-	out_uint32_le(s, 0); // no encryption
+	out_uint16_le(s, 156); // length
+	out_uint32_le(s, 2); // 128-bit
+	out_uint32_le(s, 3); // high
+
+	out_uint32_le(s, SEC_RANDOM_SIZE); // random_len
+	out_uint32_le(s, 92);              // rsa_info_len
+	out_uint8s(s, SEC_RANDOM_SIZE);    // server_random
+	out_uint32_le(s, 1);               // RDP4-style
+	// unknown
+	out_uint32_le(s, 1);		
+	out_uint32_le(s, 1);
+
+	out_uint16_le(s, SEC_TAG_PUBKEY);
+	out_uint16_le(s, 92);
+	out_uint32_le(s, SEC_RSA_MAGIC);
+	out_uint32_le(s, SEC_MODULUS_SIZE + SEC_PADDING_SIZE);  // modulus_len
+	out_uint32_le(s, SEC_MODULUS_SIZE * 8);                 // modulus_bits
+	out_uint32_le(s, 0x3f);                                 // unknown
+	out_uint8p(s, my_exponent, SEC_EXPONENT_SIZE);
+	out_uint8p(s, my_modulus, SEC_MODULUS_SIZE);
+	out_uint8s(s, SEC_PADDING_SIZE);
 	
 	s_mark_end(s);
-	printf("LEN: %u\n", s->p - s->iso_hdr);
 	iso_send(s);
 
 }
@@ -258,11 +366,11 @@ mcs_send_aucf(uint16 mcs_userid)
 {
 	STREAM s;
 
-	s = iso_init(5);
+	s = iso_init(4);
 
 	out_uint8(s, (MCS_AUCF << 2) | 2);  // | 2 = send user ID
 	out_uint8(s, 0);  // success
-	out_uint16_be(s, 0);
+	out_uint16_be(s, 6);
 	
 	s_mark_end(s);
 	iso_send(s);
@@ -292,11 +400,12 @@ mcs_send_cjcf(uint16 userid, uint16 chanid)
 {
 	STREAM s;
 
-	s = iso_init(5);
+	s = iso_init(8);
 
-	out_uint8(s, (MCS_CJCF << 2));
+	out_uint8(s, (MCS_CJCF << 2) | 2);
 	out_uint8(s, 0); // success
-	out_uint16_be(s, g_mcs_userid);
+	out_uint16_be(s, 6);
+	out_uint16_be(s, chanid);
 	out_uint16_be(s, chanid);
 
 	s_mark_end(s);
@@ -366,6 +475,7 @@ mcs_recv(uint16 * channel)
 
 		return s;
 	case MCS_DPUM:
+		printf("Received DPUM (?)\n");
 		return NULL;
 	case MCS_EDRQ:
 		// Erect Domain (ignore)