+++ /dev/null
-/* -*- c-basic-offset: 8 -*-
- rdesktop: A Remote Desktop Protocol client.
- RDP licensing negotiation
- Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
- Copyright (C) Thomas Uhle <thomas.uhle@mailbox.tu-dresden.de> 2011
- Copyright (C) Henrik Andersson <henrik.andersson@cendio.com> 2014
-
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "precomp.h"
-
-void *
-rdssl_rc4_info_create(void);
-void
-rdssl_rc4_info_delete(void * rc4_info);
-void
-rdssl_rc4_set_key(void * rc4_info, char * key, int len);
-void
-rdssl_rc4_crypt(void * rc4_info, char * in_data, char * out_data, int len);
-int
-rdssl_mod_exp(char* out, int out_len, char* in, int in_len,
- char* mod, int mod_len, char* exp, int exp_len);
-
-extern char g_username[256];
-extern char g_hostname[256];
-extern RDP_VERSION g_rdp_version;
-
-static uint8 g_licence_key[16];
-static uint8 g_licence_sign_key[16];
-
-RD_BOOL g_licence_issued = False;
-RD_BOOL g_licence_error_result = False;
-
-/* Generate a session key and RC4 keys, given client and server randoms */
-static void
-licence_generate_keys(uint8 * client_random, uint8 * server_random, uint8 * pre_master_secret)
-{
- uint8 master_secret[48];
- uint8 key_block[48];
-
- /* Generate master secret and then key material */
- sec_hash_48(master_secret, pre_master_secret, client_random, server_random, 'A');
- sec_hash_48(key_block, master_secret, server_random, client_random, 'A');
-
- /* Store first 16 bytes of session key as MAC secret */
- memcpy(g_licence_sign_key, key_block, 16);
-
- /* Generate RC4 key from next 16 bytes */
- sec_hash_16(g_licence_key, &key_block[16], client_random, server_random);
-}
-
-static void
-licence_generate_hwid(uint8 * hwid)
-{
- buf_out_uint32(hwid, 2);
- strncpy((char *) (hwid + 4), g_hostname, LICENCE_HWID_SIZE - 4);
-}
-
-/* Send a lincece info packet to server */
-static void
-licence_info(uint8 * client_random, uint8 * rsa_data,
- uint8 * licence_data, int licence_size, uint8 * hwid, uint8 * signature)
-{
- uint32 sec_flags = SEC_LICENSE_PKT;
- uint16 length =
- 24 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE +
- licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE;
- STREAM s;
-
- s = sec_init(sec_flags, length + 2);
-
- out_uint8(s, LICENCE_TAG_LICENCE_INFO);
- out_uint8(s, ((g_rdp_version >= RDP_V5) ? 3 : 2)); /* version */
- out_uint16_le(s, length);
-
- out_uint32_le(s, 1);
- out_uint16(s, 0);
- out_uint16_le(s, 0x0201);
-
- out_uint8p(s, client_random, SEC_RANDOM_SIZE);
- out_uint16_le(s, 2);
- out_uint16_le(s, (SEC_MODULUS_SIZE + SEC_PADDING_SIZE));
- out_uint8p(s, rsa_data, SEC_MODULUS_SIZE);
- out_uint8s(s, SEC_PADDING_SIZE);
-
- out_uint16_le(s, 1);
- out_uint16_le(s, licence_size);
- out_uint8p(s, licence_data, licence_size);
-
- out_uint16_le(s, 1);
- out_uint16_le(s, LICENCE_HWID_SIZE);
- out_uint8p(s, hwid, LICENCE_HWID_SIZE);
-
- out_uint8p(s, signature, LICENCE_SIGNATURE_SIZE);
-
- s_mark_end(s);
- sec_send(s, sec_flags);
-}
-
-/* Send a new licence request packet */
-static void
-licence_send_new_licence_request(uint8 * client_random, uint8 * rsa_data, char *user, char *host)
-{
- uint32 sec_flags = SEC_LICENSE_PKT;
- uint16 userlen = strlen(user) + 1;
- uint16 hostlen = strlen(host) + 1;
- uint16 length =
- 24 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE + userlen + hostlen;
- STREAM s;
-
- s = sec_init(sec_flags, length + 2);
-
- out_uint8(s, LICENCE_TAG_NEW_LICENCE_REQUEST);
- out_uint8(s, ((g_rdp_version >= RDP_V5) ? 3 : 2)); /* version */
- out_uint16_le(s, length);
-
- out_uint32_le(s, 1); // KEY_EXCHANGE_ALG_RSA
- out_uint16(s, 0);
- out_uint16_le(s, 0xff01);
-
- out_uint8p(s, client_random, SEC_RANDOM_SIZE);
- out_uint16_le(s, 2);
- out_uint16_le(s, (SEC_MODULUS_SIZE + SEC_PADDING_SIZE));
- out_uint8p(s, rsa_data, SEC_MODULUS_SIZE);
- out_uint8s(s, SEC_PADDING_SIZE);
-
- /* Username LICENSE_BINARY_BLOB */
- out_uint16_le(s, BB_CLIENT_USER_NAME_BLOB);
- out_uint16_le(s, userlen);
- out_uint8p(s, user, userlen);
-
- /* Machinename LICENSE_BINARY_BLOB */
- out_uint16_le(s, BB_CLIENT_MACHINE_NAME_BLOB);
- out_uint16_le(s, hostlen);
- out_uint8p(s, host, hostlen);
-
- s_mark_end(s);
- sec_send(s, sec_flags);
-}
-
-/* Process a licence request packet */
-static void
-licence_process_request(STREAM s)
-{
- uint8 null_data[SEC_MODULUS_SIZE];
- uint8 *server_random;
- uint8 signature[LICENCE_SIGNATURE_SIZE];
- uint8 hwid[LICENCE_HWID_SIZE];
- uint8 *licence_data;
- int licence_size;
- void * crypt_key;
-
- /* Retrieve the server random from the incoming packet */
- in_uint8p(s, server_random, SEC_RANDOM_SIZE);
-
- /* We currently use null client keys. This is a bit naughty but, hey,
- the security of licence negotiation isn't exactly paramount. */
- memset(null_data, 0, sizeof(null_data));
- licence_generate_keys(null_data, server_random, null_data);
-
- licence_size = load_licence(&licence_data);
- if (licence_size > 0)
- {
- /* Generate a signature for the HWID buffer */
- licence_generate_hwid(hwid);
- sec_sign(signature, 16, g_licence_sign_key, 16, hwid, sizeof(hwid));
-
- /* Now encrypt the HWID */
- crypt_key = rdssl_rc4_info_create();
- rdssl_rc4_set_key(crypt_key, (char *)g_licence_key, 16);
- rdssl_rc4_crypt(crypt_key, (char *)hwid, (char *)hwid, sizeof(hwid));
- rdssl_rc4_info_delete(crypt_key);
-
-#if WITH_DEBUG
- DEBUG(("Sending licensing PDU (message type 0x%02x)\n", LICENCE_TAG_LICENCE_INFO));
-#endif
- licence_info(null_data, null_data, licence_data, licence_size, hwid, signature);
-
- xfree(licence_data);
- return;
- }
-
-#if WITH_DEBUG
- DEBUG(("Sending licensing PDU (message type 0x%02x)\n", LICENCE_TAG_NEW_LICENCE_REQUEST));
-#endif
- licence_send_new_licence_request(null_data, null_data, g_username, g_hostname);
-}
-
-/* Send a platform challenge response packet */
-static void
-licence_send_platform_challenge_response(uint8 * token, uint8 * crypt_hwid, uint8 * signature)
-{
- uint32 sec_flags = SEC_LICENSE_PKT;
- uint16 length = 58;
- STREAM s;
-
- s = sec_init(sec_flags, length + 2);
-
- out_uint8(s, LICENCE_TAG_PLATFORM_CHALLANGE_RESPONSE);
- out_uint8(s, ((g_rdp_version >= RDP_V5) ? 3 : 2)); /* version */
- out_uint16_le(s, length);
-
- out_uint16_le(s, 1);
- out_uint16_le(s, LICENCE_TOKEN_SIZE);
- out_uint8p(s, token, LICENCE_TOKEN_SIZE);
-
- out_uint16_le(s, 1);
- out_uint16_le(s, LICENCE_HWID_SIZE);
- out_uint8p(s, crypt_hwid, LICENCE_HWID_SIZE);
-
- out_uint8p(s, signature, LICENCE_SIGNATURE_SIZE);
-
- s_mark_end(s);
- sec_send(s, sec_flags);
-}
-
-/* Parse a platform challenge request packet */
-static RD_BOOL
-licence_parse_platform_challenge(STREAM s, uint8 ** token, uint8 ** signature)
-{
- uint16 tokenlen;
-
- in_uint8s(s, 6); /* unknown: f8 3d 15 00 04 f6 */
-
- in_uint16_le(s, tokenlen);
- if (tokenlen != LICENCE_TOKEN_SIZE)
- {
- error("token len %d\n", tokenlen);
- return False;
- }
-
- in_uint8p(s, *token, tokenlen);
- in_uint8p(s, *signature, LICENCE_SIGNATURE_SIZE);
-
- return s_check_end(s);
-}
-
-/* Process a platform challenge packet */
-static void
-licence_process_platform_challenge(STREAM s)
-{
- uint8 *in_token = NULL, *in_sig;
- uint8 out_token[LICENCE_TOKEN_SIZE], decrypt_token[LICENCE_TOKEN_SIZE];
- uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE];
- uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE];
- uint8 out_sig[LICENCE_SIGNATURE_SIZE];
- void * crypt_key;
-
- /* Parse incoming packet and save the encrypted token */
- licence_parse_platform_challenge(s, &in_token, &in_sig);
- memcpy(out_token, in_token, LICENCE_TOKEN_SIZE);
-
- /* Decrypt the token. It should read TEST in Unicode. */
- crypt_key = rdssl_rc4_info_create();
- rdssl_rc4_set_key(crypt_key, (char *)g_licence_key, 16);
- rdssl_rc4_crypt(crypt_key, (char *)in_token, (char *)decrypt_token, LICENCE_TOKEN_SIZE);
- rdssl_rc4_info_delete(crypt_key);
-
- /* Generate a signature for a buffer of token and HWID */
- licence_generate_hwid(hwid);
- memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);
- memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);
- sec_sign(out_sig, 16, g_licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer));
-
- /* Now encrypt the HWID */
- crypt_key = rdssl_rc4_info_create();
- rdssl_rc4_set_key(crypt_key, (char *)g_licence_key, 16);
- rdssl_rc4_crypt(crypt_key, (char *)hwid, (char *)crypt_hwid, LICENCE_HWID_SIZE);
-
- licence_send_platform_challenge_response(out_token, crypt_hwid, out_sig);
-}
-
-/* Process a new licence packet */
-static void
-licence_process_new_license(STREAM s)
-{
- void * crypt_key;
- uint32 length;
- int i;
-
- in_uint8s(s, 2); // Skip license binary blob type
- in_uint16_le(s, length);
- if (!s_check_rem(s, length))
- return;
-
- crypt_key = rdssl_rc4_info_create();
- rdssl_rc4_set_key(crypt_key, (char *)g_licence_key, 16);
- rdssl_rc4_crypt(crypt_key, (char *)s->p, (char *)s->p, length);
- rdssl_rc4_info_delete(crypt_key);
-
- /* Parse NEW_LICENSE_INFO block */
- in_uint8s(s, 4); // skip dwVersion
-
- /* Skip strings, Scope, CompanyName and ProductId to get
- to the LicenseInfo which we store in license blob. */
- length = 0;
- for (i = 0; i < 4; i++)
- {
- in_uint8s(s, length);
- in_uint32_le(s, length);
- if (!s_check_rem(s, length))
- return;
- }
-
- g_licence_issued = True;
- save_licence(s->p, length);
-}
-
-/* process a licence error alert packet */
-void
-licence_process_error_alert(STREAM s)
-{
- uint32 error_code;
- uint32 state_transition;
- uint32 error_info;
- in_uint32(s, error_code);
- in_uint32(s, state_transition);
- in_uint32(s, error_info);
-
- /* There is a special case in the error alert handling, when licensing is all good
- and the server is not sending a license to client, a "Server License Error PDU -
- Valid Client" packet is sent which means, every thing is ok.
-
- Therefor we should flag that everything is ok with license here.
- */
- if (error_code == 0x07)
- {
- g_licence_issued = True;
- return;
- }
-
- /* handle error codes, for now, just report them */
- switch (error_code)
- {
- case 0x6: // ERR_NO_LICENSE_SERVER
- warning("License error alert from server: No license server\n");
- break;
-
- case 0x8: // ERR_INVALID_CLIENT
- warning("License error alert from server: Invalid client\n");
- break;
-
- case 0x4: // ERR_INVALID_SCOPE
- case 0xb: // ERR_INVALID_PRODUCTID
- case 0xc: // ERR_INVALID_MESSAGE_LENGTH
- default:
- warning("License error alert from server: code %u, state transition %u\n",
- error_code, state_transition);
- break;
- }
-
- /* handle error codes, for now, just report them */
- switch (error_info)
- {
- default:
- break;
- }
-
- g_licence_error_result = True;
-}
-
-
-/* Process a licence packet */
-void
-licence_process(STREAM s)
-{
- uint8 tag;
-
- in_uint8(s, tag);
- in_uint8s(s, 3); /* version, length */
-
-#if WITH_DEBUG
- DEBUG(("Received licensing PDU (message type 0x%02x)\n", tag));
-#endif
-
- switch (tag)
- {
- case LICENCE_TAG_REQUEST:
- licence_process_request(s);
- break;
-
- case LICENCE_TAG_PLATFORM_CHALLANGE:
- licence_process_platform_challenge(s);
- break;
-
- case LICENCE_TAG_NEW_LICENCE:
- case LICENCE_TAG_UPGRADE_LICENCE:
- /* we can handle new and upgrades of licences the same way. */
- licence_process_new_license(s);
- break;
-
- case LICENCE_TAG_ERROR_ALERT:
- licence_process_error_alert(s);
- break;
-
- default:
- unimpl("licence tag 0x%02x\n", tag);
- }
-}
projects / reactos.git / blobdiff