secure.c File Reference

#include "precomp.h"

Include dependency graph for secure.c:

Go to the source code of this file.

Macros
#define	SEC_MODULUS_SIZE   64

Functions
void *	rdssl_sha1_info_create (void)
void	rdssl_sha1_info_delete (void *sha1_info)
void	rdssl_sha1_clear (void *sha1_info)
void	rdssl_sha1_transform (void *sha1_info, char *data, int len)
void	rdssl_sha1_complete (void *sha1_info, char *data)
void *	rdssl_md5_info_create (void)
void	rdssl_md5_info_delete (void *md5_info)
void	rdssl_md5_clear (void *md5_info)
void	rdssl_md5_transform (void *md5_info, char *data, int len)
void	rdssl_md5_complete (void *md5_info, char *data)
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)
int	rdssl_sign_ok (char *e_data, int e_len, char *n_data, int n_len, char *sign_data, int sign_len, char *sign_data2, int sign_len2, char *testkey)
PCCERT_CONTEXT	rdssl_cert_read (uint8 *data, uint32 len)
void	rdssl_cert_free (PCCERT_CONTEXT context)
uint8 *	rdssl_cert_to_rkey (PCCERT_CONTEXT cert, uint32 *key_len)
RD_BOOL	rdssl_certs_ok (PCCERT_CONTEXT server_cert, PCCERT_CONTEXT cacert)
int	rdssl_rkey_get_exp_mod (uint8 *rkey, uint8 *exponent, uint32 max_exp_len, uint8 *modulus, uint32 max_mod_len)
void	rdssl_rkey_free (uint8 *rkey)
void	sec_hash_48 (uint8 *out, uint8 *in, uint8 *salt1, uint8 *salt2, uint8 salt)
void	sec_hash_16 (uint8 *out, uint8 *in, uint8 *salt1, uint8 *salt2)
void	sec_hash_sha1_16 (uint8 *out, uint8 *in, uint8 *salt1)
void	sec_hash_to_string (char *out, int out_size, uint8 *in, int in_size)
static void	sec_make_40bit (uint8 *key)
static void	sec_generate_keys (uint8 *client_random, uint8 *server_random, int rc4_key_size)
void	buf_out_uint32 (uint8 *buffer, uint32 value)
void	sec_sign (uint8 *signature, int siglen, uint8 *session_key, int keylen, uint8 *data, int datalen)
static void	sec_update (uint8 *key, uint8 *update_key)
static void	sec_encrypt (uint8 *data, int length)
void	sec_decrypt (uint8 *data, int length)
static void	sec_rsa_encrypt (uint8 *out, uint8 *in, int len, uint32 modulus_size, uint8 *modulus, uint8 *exponent)
STREAM	sec_init (uint32 flags, int maxlen)
void	sec_send_to_channel (STREAM s, uint32 flags, uint16 channel)
void	sec_send (STREAM s, uint32 flags)
static void	sec_establish_key (void)
static void	sec_out_mcs_data (STREAM s, uint32 selected_protocol)
static RD_BOOL	sec_parse_public_key (STREAM s, uint8 *modulus, uint8 *exponent)
static RD_BOOL	sec_parse_public_sig (STREAM s, uint32 len, uint8 *modulus, uint8 *exponent)
static RD_BOOL	sec_parse_crypt_info (STREAM s, uint32 *rc4_key_size, uint8 **server_random, uint8 *modulus, uint8 *exponent)
static void	sec_process_crypt_info (STREAM s)
static void	sec_process_srv_info (STREAM s)
void	sec_process_mcs_data (STREAM s)
STREAM	sec_recv (uint8 *rdpver)
RD_BOOL	sec_connect (char *server, char *username, char *domain, char *password, RD_BOOL reconnect)
void	sec_disconnect (void)
void	sec_reset_state (void)

Variables
char	g_hostname [16]
int	g_width
int	g_height
unsigned int	g_keylayout
int	g_keyboard_type
int	g_keyboard_subtype
int	g_keyboard_functionkeys
RD_BOOL	g_encryption
RD_BOOL	g_licence_issued
RD_BOOL	g_licence_error_result
RDP_VERSION	g_rdp_version
RD_BOOL	g_console_session
uint32	g_redirect_session_id
int	g_server_depth
VCHANNEL	g_channels []
unsigned int	g_num_channels
uint8	g_client_random [SEC_RANDOM_SIZE]
static int	g_rc4_key_len
static void *	g_rc4_decrypt_key
static void *	g_rc4_encrypt_key
static uint32	g_server_public_key_len
static uint8	g_sec_sign_key [16]
static uint8	g_sec_decrypt_key [16]
static uint8	g_sec_encrypt_key [16]
static uint8	g_sec_decrypt_update_key [16]
static uint8	g_sec_encrypt_update_key [16]
static uint8	g_sec_crypted_random [SEC_MAX_MODULUS_SIZE]
uint16	g_server_rdp_version = 0
static int	g_sec_encrypt_use_count = 0
static int	g_sec_decrypt_use_count = 0
static uint8	g_testkey [176]
static uint8	pad_54 [40]
static uint8	pad_92 [48]

Macro Definition Documentation

SEC_MODULUS_SIZE

#define SEC_MODULUS_SIZE   64

Definition at line 111 of file secure.c.

Function Documentation

buf_out_uint32()

void buf_out_uint32	(	uint8 *	buffer,
		uint32	value
	)

Definition at line 304 of file secure.c.

{
    buffer[0] = (value) & 0xff;
    buffer[1] = (value >> 8) & 0xff;
    buffer[2] = (value >> 16) & 0xff;
    buffer[3] = (value >> 24) & 0xff;
}

Referenced by sec_sign().

rdssl_cert_free()

void rdssl_cert_free

(

PCCERT_CONTEXT

context

)

Definition at line 1656 of file ssl_calls.c.

{
    if (context)
        CertFreeCertificateContext(context);
}

Referenced by sec_parse_crypt_info().

rdssl_cert_read()

PCCERT_CONTEXT rdssl_cert_read	(	uint8 *	data,
		uint32	len
	)

Definition at line 1639 of file ssl_calls.c.

{
    PCCERT_CONTEXT res;
    if (!data || !len)
    {
        error("rdssl_cert_read %p %ld\n", data, len);
        return NULL;
    }
    res = CertCreateCertificateContext(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, data, len);
    if (!res)
    {
        error("CertCreateCertificateContext call failed with %lx\n", GetLastError());
    }
    return res;
}

Referenced by sec_parse_crypt_info().

rdssl_cert_to_rkey()

uint8 * rdssl_cert_to_rkey	(	PCCERT_CONTEXT	cert,
		uint32 *	key_len
	)

Definition at line 1663 of file ssl_calls.c.

{
    HCRYPTPROV hCryptProv;
    HCRYPTKEY hKey;
    BOOL ret;
    BYTE * rkey;
    DWORD dwSize, dwErr;
    ret = CryptAcquireContext(&hCryptProv,
                              NULL,
                              MS_ENHANCED_PROV,
                              PROV_RSA_FULL,
                              0);
    if (!ret)
    {
        dwErr = GetLastError();
        if (dwErr == NTE_BAD_KEYSET)
        {
            ret = CryptAcquireContext(&hCryptProv,
                                      L"MSTSC",
                                      MS_ENHANCED_PROV,
                                      PROV_RSA_FULL,
                                      CRYPT_NEWKEYSET);
        }
    }
    if (!ret)
    {
        dwErr = GetLastError();
        error("CryptAcquireContext call failed with %lx\n", dwErr);
        return NULL;
    }
    ret = CryptImportPublicKeyInfoEx(hCryptProv,
                                     X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
                                     &(cert->pCertInfo->SubjectPublicKeyInfo),
                                     0,
                                     0,
                                     NULL,
                                     &hKey);
    if (!ret)
    {
        dwErr = GetLastError();
        CryptReleaseContext(hCryptProv, 0);
        error("CryptImportPublicKeyInfoEx call failed with %lx\n", dwErr);
        return NULL;
    }
    ret = CryptExportKey(hKey,
                         0,
                         PUBLICKEYBLOB,
                         0,
                         NULL,
                         &dwSize);
    if (!ret)
    {
        dwErr = GetLastError();
        CryptDestroyKey(hKey);
        CryptReleaseContext(hCryptProv, 0);
        error("CryptExportKey call failed with %lx\n", dwErr);
        return NULL;
    }
    rkey = g_malloc(dwSize, 0);
    ret = CryptExportKey(hKey,
                         0,
                         PUBLICKEYBLOB,
                         0,
                         rkey,
                         &dwSize);
    if (!ret)
    {
        dwErr = GetLastError();
        g_free(rkey);
        CryptDestroyKey(hKey);
        CryptReleaseContext(hCryptProv, 0);
        error("CryptExportKey call failed with %lx\n", dwErr);
        return NULL;
    }
    CryptDestroyKey(hKey);
    CryptReleaseContext(hCryptProv, 0);
    return rkey;
}

Referenced by sec_parse_crypt_info().

rdssl_certs_ok()

RD_BOOL rdssl_certs_ok	(	PCCERT_CONTEXT	server_cert,
		PCCERT_CONTEXT	cacert
	)

Definition at line 1743 of file ssl_calls.c.

{
    /* FIXME should we check for expired certificates??? */
    DWORD dwFlags = CERT_STORE_SIGNATURE_FLAG; /* CERT_STORE_TIME_VALIDITY_FLAG */
    BOOL ret = CertVerifySubjectCertificateContext(server_cert,
                                                   cacert,
                                                   &dwFlags);
    if (!ret)
    {
        error("CertVerifySubjectCertificateContext call failed with %lx\n", GetLastError());
    }
    if (dwFlags)
    {
        error("CertVerifySubjectCertificateContext check failed %lx\n", dwFlags);
    }
    return (dwFlags == 0);
}

Referenced by sec_parse_crypt_info().

rdssl_md5_clear()

void rdssl_md5_clear

(

void *

md5_info

)

Definition at line 428 of file ssl_calls.c.

{
    rdssl_hash_clear(md5_info, CALG_MD5);
}

Referenced by rdssl_sign_ok(), sec_hash_16(), sec_hash_48(), sec_sign(), and sec_update().

rdssl_md5_complete()

void rdssl_md5_complete	(	void *	md5_info,
		char *	data
	)

Definition at line 442 of file ssl_calls.c.

{
    rdssl_hash_complete(md5_info, data);
}

Referenced by rdssl_sign_ok(), sec_hash_16(), sec_hash_48(), sec_sign(), and sec_update().

rdssl_md5_info_create()

void * rdssl_md5_info_create

(

void

)

Definition at line 414 of file ssl_calls.c.

{
    return rdssl_hash_info_create(CALG_MD5);
}

Referenced by rdssl_sign_ok(), sec_hash_16(), sec_hash_48(), sec_sign(), and sec_update().

rdssl_md5_info_delete()

void rdssl_md5_info_delete

(

void *

md5_info

)

Definition at line 421 of file ssl_calls.c.

{
    rdssl_hash_info_delete(md5_info);
}

Referenced by rdssl_sign_ok(), sec_hash_16(), sec_hash_48(), sec_sign(), and sec_update().

rdssl_md5_transform()

void rdssl_md5_transform	(	void *	md5_info,
		char *	data,
		int	len
	)

Definition at line 435 of file ssl_calls.c.

{
    rdssl_hash_transform(md5_info, data, len);
}

Referenced by rdssl_sign_ok(), sec_hash_16(), sec_hash_48(), sec_sign(), and sec_update().

rdssl_mod_exp()

int rdssl_mod_exp	(	char *	out,
		int	out_len,
		char *	in,
		int	in_len,
		char *	mod,
		int	mod_len,
		char *	exp,
		int	exp_len
	)

Definition at line 1485 of file ssl_calls.c.

{
  /* Computes y = x ^ e mod m */
  /* Binary left-to-right method */
  DIGIT_T mask;
  DIGIT_T* e;
  DIGIT_T* x;
  DIGIT_T* y;
  DIGIT_T* m;
  unsigned int n;
  int max_size;
  char* l_out;
  char* l_in;
  char* l_mod;
  char* l_exp;
 
  if (in_len > out_len || in_len == 0 ||
      out_len == 0 || mod_len == 0 || exp_len == 0)
  {
    return 0;
  }
  max_size = out_len;
  if (in_len > max_size)
  {
    max_size = in_len;
  }
  if (mod_len > max_size)
  {
    max_size = mod_len;
  }
  if (exp_len > max_size)
  {
    max_size = exp_len;
  }
  l_out = (char*)g_malloc(max_size, 1);
  l_in = (char*)g_malloc(max_size, 1);
  l_mod = (char*)g_malloc(max_size, 1);
  l_exp = (char*)g_malloc(max_size, 1);
  memcpy(l_in, in, in_len);
  memcpy(l_mod, mod, mod_len);
  memcpy(l_exp, exp, exp_len);
  e = (DIGIT_T*)l_exp;
  x = (DIGIT_T*)l_in;
  y = (DIGIT_T*)l_out;
  m = (DIGIT_T*)l_mod;
  /* Find second-most significant bit in e */
  n = mpSizeof(e, max_size / 4);
  for (mask = HIBITMASK; mask > 0; mask >>= 1)
  {
    if (e[n - 1] & mask)
    {
      break;
    }
  }
  mpNEXTBITMASK(mask, n);
  /* Set y = x */
  mpSetEqual(y, x, max_size / 4);
  /* For bit j = k - 2 downto 0 step -1 */
  while (n)
  {
    mpModMult(y, y, y, m, max_size / 4); /* Square */
    if (e[n - 1] & mask)
    {
      mpModMult(y, y, x, m, max_size / 4); /* Multiply */
    }
    /* Move to next bit */
    mpNEXTBITMASK(mask, n);
  }
  memcpy(out, l_out, out_len);
  g_free(l_out);
  g_free(l_in);
  g_free(l_mod);
  g_free(l_exp);
  return out_len;
}

Referenced by rdssl_sign_ok(), and sec_rsa_encrypt().

rdssl_rc4_crypt()

void rdssl_rc4_crypt	(	void *	rc4_info,
		char *	in_data,
		char *	out_data,
		int	len
	)

Definition at line 173 of file ssl_calls.c.

{
    struct rc4_state *info = rc4_info;
    BOOL ret;
    DWORD dwErr;
    BYTE * intermediate_data;
    DWORD dwLen = len;
    if (!rc4_info || !in_data || !out_data || !len || !info->hKey)
    {
        error("rdssl_rc4_crypt %p %p %p %d\n", rc4_info, in_data, out_data, len);
        return;
    }
    intermediate_data = g_malloc(len, 0);
    if (!intermediate_data)
    {
        error("rdssl_rc4_set_key no memory\n");
        return;
    }
    memcpy(intermediate_data, in_data, len);
    ret = CryptEncrypt(info->hKey,
                       0,
                       FALSE,
                       0,
                       intermediate_data,
                       &dwLen,
                       dwLen);
    if (!ret)
    {
        dwErr = GetLastError();
        g_free(intermediate_data);
        error("CryptEncrypt failed with %lx\n", dwErr);
        return;
    }
    memcpy(out_data, intermediate_data, len);
    g_free(intermediate_data);
}

Referenced by sec_decrypt(), sec_encrypt(), and sec_update().

rdssl_rc4_info_create()

void * rdssl_rc4_info_create

(

void

)

Definition at line 51 of file ssl_calls.c.

{
    struct rc4_state *info = g_malloc(sizeof(struct rc4_state), 1);
    BOOL ret;
    DWORD dwErr;
    if (!info)
    {
        error("rdssl_rc4_info_create no memory\n");
        return NULL;
    }
    ret = CryptAcquireContext(&info->hCryptProv,
                              L"MSTSC",
                              MS_ENHANCED_PROV,
                              PROV_RSA_FULL,
                              0);
    if (!ret)
    {
        dwErr = GetLastError();
        if (dwErr == NTE_BAD_KEYSET)
        {
            ret = CryptAcquireContext(&info->hCryptProv,
                                      L"MSTSC",
                                      MS_ENHANCED_PROV,
                                      PROV_RSA_FULL,
                                      CRYPT_NEWKEYSET);
        }
    }
    if (!ret)
    {
        dwErr = GetLastError();
        error("CryptAcquireContext failed with %lx\n", dwErr);
        g_free(info);
        return NULL;
    }
    return info;
}

Referenced by sec_generate_keys(), and sec_update().

rdssl_rc4_info_delete()

void rdssl_rc4_info_delete

(

void *

rc4_info

)

Definition at line 90 of file ssl_calls.c.

{
    struct rc4_state *info = rc4_info;
    BOOL ret = TRUE;
    DWORD dwErr;
    if (!info)
    {
        //error("rdssl_rc4_info_delete rc4_info is null\n");
        return;
    }
    if (info->hKey)
    {
        ret = CryptDestroyKey(info->hKey);
        if (!ret)
        {
            dwErr = GetLastError();
            error("CryptDestroyKey failed with %lx\n", dwErr);
        }
    }
    if (info->hCryptProv)
    {
        ret = CryptReleaseContext(info->hCryptProv, 0);
        if (!ret)
        {
            dwErr = GetLastError();
            error("CryptReleaseContext failed with %lx\n", dwErr);
        }
    }
    g_free(rc4_info);
}

Referenced by sec_generate_keys(), and sec_update().

rdssl_rc4_set_key()

void rdssl_rc4_set_key	(	void *	rc4_info,
		char *	key,
		int	len
	)

Definition at line 123 of file ssl_calls.c.

{
    struct rc4_state *info = rc4_info;
    BOOL ret;
    DWORD dwErr;
    BYTE * blob;
    PUBLICKEYSTRUC *desc;
    DWORD * keySize;
    BYTE * keyBuf;
    if (!rc4_info || !key || !len || !info->hCryptProv)
    {
        error("rdssl_rc4_set_key %p %p %d\n", rc4_info, key, len);
        return;
    }
    blob = g_malloc(sizeof(PUBLICKEYSTRUC) + sizeof(DWORD) + len, 0);
    if (!blob)
    {
        error("rdssl_rc4_set_key no memory\n");
        return;
    }
    desc = (PUBLICKEYSTRUC *)blob;
    keySize = (DWORD *)(blob + sizeof(PUBLICKEYSTRUC));
    keyBuf = blob + sizeof(PUBLICKEYSTRUC) + sizeof(DWORD);
    desc->aiKeyAlg = CALG_RC4;
    desc->bType = PLAINTEXTKEYBLOB;
    desc->bVersion = CUR_BLOB_VERSION;
    desc->reserved = 0;
    *keySize = len;
    memcpy(keyBuf, key, len);
    if (info->hKey)
    {
        CryptDestroyKey(info->hKey);
        info->hKey = 0;
    }
    ret = CryptImportKey(info->hCryptProv,
                         blob,
                         sizeof(PUBLICKEYSTRUC) + sizeof(DWORD) + len,
                         0,
                         CRYPT_EXPORTABLE,
                         &info->hKey);
    g_free(blob);
    if (!ret)
    {
        dwErr = GetLastError();
        error("CryptImportKey failed with %lx\n", dwErr);
    }
}

Referenced by sec_decrypt(), sec_encrypt(), sec_generate_keys(), and sec_update().

rdssl_rkey_free()

void rdssl_rkey_free

(

uint8 *

rkey

)

Definition at line 1777 of file ssl_calls.c.

{
    if (!rkey)
    {
        error("rdssl_rkey_free rkey is null\n");
        return;
    }
    g_free(rkey);
}

Referenced by sec_parse_crypt_info().

rdssl_rkey_get_exp_mod()

int rdssl_rkey_get_exp_mod	(	uint8 *	rkey,
		uint8 *	exponent,
		uint32	max_exp_len,
		uint8 *	modulus,
		uint32	max_mod_len
	)

Definition at line 1762 of file ssl_calls.c.

{
    RSAPUBKEY *desc = (RSAPUBKEY *)(rkey + sizeof(PUBLICKEYSTRUC));
    if (!rkey || !exponent || !max_exp_len || !modulus || !max_mod_len)
    {
        error("rdssl_rkey_get_exp_mod %p %p %ld %p %ld\n", rkey, exponent, max_exp_len, modulus, max_mod_len);
        return -1;
    }
    memcpy (exponent, &desc->pubexp, max_exp_len);
    memcpy (modulus, rkey + sizeof(PUBLICKEYSTRUC) + sizeof(RSAPUBKEY), max_mod_len);
    return 0;
}

Referenced by sec_parse_crypt_info().

rdssl_sha1_clear()

void rdssl_sha1_clear

(

void *

sha1_info

)

Definition at line 393 of file ssl_calls.c.

{
    rdssl_hash_clear(sha1_info, CALG_SHA1);
}

Referenced by sec_hash_48(), sec_hash_sha1_16(), sec_sign(), and sec_update().

rdssl_sha1_complete()

void rdssl_sha1_complete	(	void *	sha1_info,
		char *	data
	)

Definition at line 407 of file ssl_calls.c.

{
    rdssl_hash_complete(sha1_info, data);
}

Referenced by sec_hash_48(), sec_hash_sha1_16(), sec_sign(), and sec_update().

rdssl_sha1_info_create()

void * rdssl_sha1_info_create

(

void

)

Definition at line 379 of file ssl_calls.c.

{
    return rdssl_hash_info_create(CALG_SHA1);
}

Referenced by sec_hash_48(), sec_hash_sha1_16(), sec_sign(), and sec_update().

rdssl_sha1_info_delete()

void rdssl_sha1_info_delete

(

void *

sha1_info

)

Definition at line 386 of file ssl_calls.c.

{
    rdssl_hash_info_delete(sha1_info);
}

Referenced by sec_hash_48(), sec_hash_sha1_16(), sec_sign(), and sec_update().

rdssl_sha1_transform()

void rdssl_sha1_transform	(	void *	sha1_info,
		char *	data,
		int	len
	)

Definition at line 400 of file ssl_calls.c.

{
    rdssl_hash_transform(sha1_info, data, len);
}

Referenced by sec_hash_48(), sec_hash_sha1_16(), sec_sign(), and sec_update().

rdssl_sign_ok()

int rdssl_sign_ok	(	char *	e_data,
		int	e_len,
		char *	n_data,
		int	n_len,
		char *	sign_data,
		int	sign_len,
		char *	sign_data2,
		int	sign_len2,
		char *	testkey
	)

Definition at line 1594 of file ssl_calls.c.

{
    char* key;
    char* md5_final;
    void* md5;
 
    if ((e_len != 4) || (n_len != 64) || (sign_len != 64) || (sign_len2 != 64))
    {
        return 1;
    }
    md5 = rdssl_md5_info_create();
    if (!md5)
    {
        return 1;
    }
    key = (char*)xmalloc(176);
    md5_final = (char*)xmalloc(64);
    // copy the test key
    memcpy(key, testkey, 176);
    // replace e and n
    memcpy(key + 32, e_data, 4);
    memcpy(key + 36, n_data, 64);
    rdssl_md5_clear(md5);
    // the first 108 bytes
    rdssl_md5_transform(md5, key, 108);
    // set the whole thing with 0xff
    memset(md5_final, 0xff, 64);
    // digest 16 bytes
    rdssl_md5_complete(md5, md5_final);
    // set non 0xff array items
    md5_final[16] = 0;
    md5_final[62] = 1;
    md5_final[63] = 0;
    // encrypt
    rdssl_mod_exp(sign_data, 64, md5_final, 64, (char*)g_ppk_n, 64,
        (char*)g_ppk_d, 64);
    // cleanup
    rdssl_md5_info_delete(md5);
    xfree(key);
    xfree(md5_final);
    return memcmp(sign_data, sign_data2, sign_len2);
}

Referenced by sec_parse_public_sig().

sec_connect()

RD_BOOL sec_connect	(	char *	server,
		char *	username,
		char *	domain,
		char *	password,
		RD_BOOL	reconnect
	)

Definition at line 1005 of file secure.c.

{
    uint32 selected_proto;
    struct stream mcs_data;
 
    /* Start a MCS connect sequence */
    if (!mcs_connect_start(server, username, domain, password, reconnect, &selected_proto))
        return False;
 
    /* We exchange some RDP data during the MCS-Connect */
    mcs_data.size = 512;
    mcs_data.p = mcs_data.data = (uint8 *) xmalloc(mcs_data.size);
    sec_out_mcs_data(&mcs_data, selected_proto);
 
    /* finalize the MCS connect sequence */
    if (!mcs_connect_finalize(&mcs_data))
        return False;
 
    /* sec_process_mcs_data(&mcs_data); */
    if (g_encryption)
        sec_establish_key();
    xfree(mcs_data.data);
    return True;
}

Referenced by rdp_connect().

sec_decrypt()

void sec_decrypt	(	uint8 *	data,
		int	length
	)

Definition at line 396 of file secure.c.

{
    if (g_sec_decrypt_use_count == 4096)
    {
        sec_update(g_sec_decrypt_key, g_sec_decrypt_update_key);
        rdssl_rc4_set_key(g_rc4_decrypt_key, (char *)g_sec_decrypt_key, g_rc4_key_len);
        g_sec_decrypt_use_count = 0;
    }
 
    rdssl_rc4_crypt(g_rc4_decrypt_key,(char *)data, (char *)data, length);
    g_sec_decrypt_use_count++;
}

Referenced by sec_recv().

sec_disconnect()

void sec_disconnect

(

void

)

Definition at line 1032 of file secure.c.

{
    mcs_disconnect();
}

Referenced by rdp_disconnect().

sec_encrypt()

static void sec_encrypt ( uint8 *  data, int  length  )

static

Definition at line 381 of file secure.c.

{
    if (g_sec_encrypt_use_count == 4096)
    {
        sec_update(g_sec_encrypt_key, g_sec_encrypt_update_key);
        rdssl_rc4_set_key(g_rc4_encrypt_key, (char *)g_sec_encrypt_key, g_rc4_key_len);
        g_sec_encrypt_use_count = 0;
    }
 
    rdssl_rc4_crypt(g_rc4_encrypt_key, (char *)data, (char *)data, length);
    g_sec_encrypt_use_count++;
}

Referenced by sec_send_to_channel().

sec_establish_key()

static void sec_establish_key ( void  )

static

Definition at line 480 of file secure.c.

{
    uint32 length = g_server_public_key_len + SEC_PADDING_SIZE;
    uint32 flags = SEC_EXCHANGE_PKT;
    STREAM s;
 
    s = sec_init(flags, length + 4);
 
    out_uint32_le(s, length);
    out_uint8p(s, g_sec_crypted_random, g_server_public_key_len);
    out_uint8s(s, SEC_PADDING_SIZE);
 
    s_mark_end(s);
    sec_send(s, flags);
}

Referenced by sec_connect(), and sec_reconnect().

sec_generate_keys()

static void sec_generate_keys ( uint8 *  client_random, uint8 *  server_random, int  rc4_key_size  )

static

Definition at line 238 of file secure.c.

{
    uint8 pre_master_secret[48];
    uint8 master_secret[48];
    uint8 key_block[48];
 
    /* Construct pre-master secret */
    memcpy(pre_master_secret, client_random, 24);
    memcpy(pre_master_secret + 24, server_random, 24);
 
    /* 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, client_random, server_random, 'X');
 
    /* First 16 bytes of key material is MAC secret */
    memcpy(g_sec_sign_key, key_block, 16);
 
    /* Generate export keys from next two blocks of 16 bytes */
    sec_hash_16(g_sec_decrypt_key, &key_block[16], client_random, server_random);
    sec_hash_16(g_sec_encrypt_key, &key_block[32], client_random, server_random);
 
    if (rc4_key_size == 1)
    {
        DEBUG(("40-bit encryption enabled\n"));
        sec_make_40bit(g_sec_sign_key);
        sec_make_40bit(g_sec_decrypt_key);
        sec_make_40bit(g_sec_encrypt_key);
        g_rc4_key_len = 8;
    }
    else
    {
        DEBUG(("rc_4_key_size == %d, 128-bit encryption enabled\n", rc4_key_size));
        g_rc4_key_len = 16;
    }
 
    /* Save initial RC4 keys as update keys */
    memcpy(g_sec_decrypt_update_key, g_sec_decrypt_key, 16);
    memcpy(g_sec_encrypt_update_key, g_sec_encrypt_key, 16);
 
    /* Initialise RC4 state arrays */
 
    rdssl_rc4_info_delete(g_rc4_decrypt_key);
    g_rc4_decrypt_key = rdssl_rc4_info_create(); 
    rdssl_rc4_set_key(g_rc4_decrypt_key, (char *)g_sec_decrypt_key, g_rc4_key_len); 
 
    rdssl_rc4_info_delete(g_rc4_encrypt_key);
    g_rc4_encrypt_key = rdssl_rc4_info_create(); 
    rdssl_rc4_set_key(g_rc4_encrypt_key, (char *)g_sec_encrypt_key, g_rc4_key_len); 
}

Referenced by sec_process_crypt_info().

sec_hash_16()

void sec_hash_16	(	uint8 *	out,
		uint8 *	in,
		uint8 *	salt1,
		uint8 *	salt2
	)

Definition at line 187 of file secure.c.

{
    void * md5;
    
    md5 = rdssl_md5_info_create();
    rdssl_md5_clear(md5);
    rdssl_md5_transform(md5, (char *)in, 16);
    rdssl_md5_transform(md5, (char *)salt1, 32);
    rdssl_md5_transform(md5, (char *)salt2, 32);
    rdssl_md5_complete(md5, (char *)out);
    rdssl_md5_info_delete(md5);
}

Referenced by sec_generate_keys().

sec_hash_48()

void sec_hash_48	(	uint8 *	out,
		uint8 *	in,
		uint8 *	salt1,
		uint8 *	salt2,
		uint8	salt
	)

Definition at line 155 of file secure.c.

{
    uint8 shasig[20];
    uint8 pad[4];
    void * sha;
    void * md5;
    int i;
 
    for (i = 0; i < 3; i++)
    {
        memset(pad, salt + i, i + 1);
        sha = rdssl_sha1_info_create();
        rdssl_sha1_clear(sha);
        rdssl_sha1_transform(sha, (char *)pad, i + 1);
        rdssl_sha1_transform(sha, (char *)in, 48);
        rdssl_sha1_transform(sha, (char *)salt1, 32);
        rdssl_sha1_transform(sha, (char *)salt2, 32);
        rdssl_sha1_complete(sha, (char *)shasig);
        rdssl_sha1_info_delete(sha);
        md5 = rdssl_md5_info_create();
        rdssl_md5_clear(md5);
        rdssl_md5_transform(md5, (char *)in, 48);
        rdssl_md5_transform(md5, (char *)shasig, 20);
        rdssl_md5_complete(md5, (char *)out + i * 16);
        rdssl_md5_info_delete(md5);
    }
}

Referenced by sec_generate_keys().

sec_hash_sha1_16()

void sec_hash_sha1_16	(	uint8 *	out,
		uint8 *	in,
		uint8 *	salt1
	)

Definition at line 204 of file secure.c.

{
    void * sha;
    sha = rdssl_sha1_info_create();
    rdssl_sha1_clear(sha);
    rdssl_sha1_transform(&sha, (char *)in, 16);
    rdssl_sha1_transform(&sha, (char *)salt1, 16);
    rdssl_sha1_complete(&sha, (char *)out);
    rdssl_sha1_info_delete(sha);
}

sec_hash_to_string()

void sec_hash_to_string	(	char *	out,
		int	out_size,
		uint8 *	in,
		int	in_size
	)

Definition at line 217 of file secure.c.

{
    int k;
    memset(out, 0, out_size);
    for (k = 0; k < in_size; k++, out += 2)
    {
        sprintf(out, "%.2x", in[k]);
    }
}

sec_init()

STREAM sec_init	(	uint32	flags,
		int	maxlen
	)

Definition at line 419 of file secure.c.

{
    int hdrlen;
    STREAM s;
 
    if (!g_licence_issued && !g_licence_error_result)
        hdrlen = (flags & SEC_ENCRYPT) ? 12 : 4;
    else
        hdrlen = (flags & SEC_ENCRYPT) ? 12 : 0;
    s = mcs_init(maxlen + hdrlen);
    s_push_layer(s, sec_hdr, hdrlen);
 
    return s;
}

Referenced by channel_init(), channel_send(), licence_info(), licence_present(), licence_send_authresp(), licence_send_new_licence_request(), licence_send_platform_challenge_response(), licence_send_request(), rdp_init_data(), rdp_send_confirm_active(), rdp_send_logon_info(), and sec_establish_key().

sec_make_40bit()

static void sec_make_40bit ( uint8 *  key )

static

Definition at line 229 of file secure.c.

{
    key[0] = 0xd1;
    key[1] = 0x26;
    key[2] = 0x9e;
}

Referenced by sec_generate_keys(), and sec_update().

sec_out_mcs_data()

static void sec_out_mcs_data ( STREAM  s, uint32  selected_protocol  )

static

Definition at line 498 of file secure.c.

{
    int hostlen = 2 * strlen(g_hostname);
    int length = 162 + 76 + 12 + 4;
    unsigned int i;
    uint32 cluster_flags = 0;
 
    if (g_num_channels > 0)
        length += g_num_channels * 12 + 8;
 
    if (hostlen > 30)
        hostlen = 30;
 
    /* Generic Conference Control (T.124) ConferenceCreateRequest */
    out_uint16_be(s, 5);
    out_uint16_be(s, 0x14);
    out_uint8(s, 0x7c);
    out_uint16_be(s, 1);
 
    out_uint16_be(s, (length | 0x8000));    /* remaining length */
 
    out_uint16_be(s, 8);    /* length? */
    out_uint16_be(s, 16);
    out_uint8(s, 0);
    out_uint16_le(s, 0xc001);
    out_uint8(s, 0);
 
    out_uint32_le(s, 0x61637544);   /* OEM ID: "Duca", as in Ducati. */
    out_uint16_be(s, ((length - 14) | 0x8000)); /* remaining length */
 
    /* Client information */
    out_uint16_le(s, SEC_TAG_CLI_INFO);
    out_uint16_le(s, 216);  /* length */
    out_uint16_le(s, (g_rdp_version >= RDP_V5) ? 4 : 1);    /* RDP version. 1 == RDP4, 4 >= RDP5 to RDP8 */
    out_uint16_le(s, 8);
    out_uint16_le(s, g_width);
    out_uint16_le(s, g_height);
    out_uint16_le(s, 0xca01);
    out_uint16_le(s, 0xaa03);
    out_uint32_le(s, g_keylayout);
    out_uint32_le(s, 2600); /* Client build. We are now 2600 compatible :-) */
 
    /* Unicode name of client, padded to 32 bytes */
    rdp_out_unistr(s, g_hostname, hostlen);
    out_uint8s(s, 30 - hostlen);
 
    /* See
       http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceddk40/html/cxtsksupportingremotedesktopprotocol.asp */
    out_uint32_le(s, g_keyboard_type);
    out_uint32_le(s, g_keyboard_subtype);
    out_uint32_le(s, g_keyboard_functionkeys);
    out_uint8s(s, 64);  /* reserved? 4 + 12 doublewords */
    out_uint16_le(s, 0xca01);   /* colour depth? */
    out_uint16_le(s, 1);
 
    out_uint32(s, 0);
    out_uint8(s, g_server_depth);
    out_uint16_le(s, 0x0700);
    out_uint8(s, 0);
    out_uint32_le(s, 1);
    out_uint8s(s, 64);
    out_uint32_le(s, selected_protocol);    /* End of client info */
 
    /* Write a Client Cluster Data (TS_UD_CS_CLUSTER) */
    out_uint16_le(s, SEC_TAG_CLI_CLUSTER);  /* header.type */
    out_uint16_le(s, 12);   /* length */
 
    cluster_flags |= SEC_CC_REDIRECTION_SUPPORTED;
    cluster_flags |= (SEC_CC_REDIRECT_VERSION_3 << 2);
 
    if (g_console_session || g_redirect_session_id != 0)
        cluster_flags |= SEC_CC_REDIRECT_SESSIONID_FIELD_VALID;
 
    out_uint32_le(s, cluster_flags);
    out_uint32(s, g_redirect_session_id);
 
    /* Client encryption settings */
    out_uint16_le(s, SEC_TAG_CLI_CRYPT);
    out_uint16_le(s, 12);   /* length */
    out_uint32_le(s, g_encryption ? 0x3 : 0);   /* encryption supported, 128-bit supported */
    out_uint32(s, 0);   /* Unknown */
 
    DEBUG_RDP5(("g_num_channels is %d\n", g_num_channels));
    if (g_num_channels > 0)
    {
        out_uint16_le(s, SEC_TAG_CLI_CHANNELS);
        out_uint16_le(s, g_num_channels * 12 + 8);  /* length */
        out_uint32_le(s, g_num_channels);   /* number of virtual channels */
        for (i = 0; i < g_num_channels; i++)
        {
            DEBUG_RDP5(("Requesting channel %s\n", g_channels[i].name));
            out_uint8a(s, g_channels[i].name, 8);
            out_uint32_be(s, g_channels[i].flags);
        }
    }
 
    s_mark_end(s);
}

Referenced by sec_connect(), and sec_reconnect().

sec_parse_crypt_info()

static RD_BOOL sec_parse_crypt_info ( STREAM  s, uint32 *  rc4_key_size, uint8 **  server_random, uint8 *  modulus, uint8 *  exponent  )

static

Definition at line 652 of file secure.c.

{
    uint32 crypt_level, random_len, rsa_info_len;
    uint32 cacert_len, cert_len, flags;
    PCCERT_CONTEXT cacert, server_cert;
    BYTE *server_public_key;
    uint16 tag, length;
    uint8 *next_tag, *end;
 
    in_uint32_le(s, *rc4_key_size); /* 1 = 40-bit, 2 = 128-bit */
    in_uint32_le(s, crypt_level);   /* 1 = low, 2 = medium, 3 = high */
    if (crypt_level == 0)
    {
        /* no encryption */
        return False;
    }
 
    in_uint32_le(s, random_len);
    in_uint32_le(s, rsa_info_len);
 
    if (random_len != SEC_RANDOM_SIZE)
    {
        error("random len %d, expected %d\n", random_len, SEC_RANDOM_SIZE);
        return False;
    }
 
    in_uint8p(s, *server_random, random_len);
 
    /* RSA info */
    end = s->p + rsa_info_len;
    if (end > s->end)
        return False;
 
    in_uint32_le(s, flags); /* 1 = RDP4-style, 0x80000002 = X.509 */
    if (flags & 1)
    {
        DEBUG_RDP5(("We're going for the RDP4-style encryption\n"));
        in_uint8s(s, 8);    /* unknown */
 
        while (s->p < end)
        {
            in_uint16_le(s, tag);
            in_uint16_le(s, length);
 
            next_tag = s->p + length;
 
            switch (tag)
            {
                case SEC_TAG_PUBKEY:
                    if (!sec_parse_public_key(s, modulus, exponent))
                        return False;
                    DEBUG_RDP5(("Got Public key, RDP4-style\n"));
 
                    break;
 
                case SEC_TAG_KEYSIG:
                    if (!sec_parse_public_sig(s, length, modulus, exponent))
                        return False;
                    break;
 
                default:
                    unimpl("crypt tag 0x%x\n", tag);
            }
 
            s->p = next_tag;
        }
    }
    else
    {
        uint32 certcount;
 
        DEBUG_RDP5(("We're going for the RDP5-style encryption\n"));
        in_uint32_le(s, certcount); /* Number of certificates */
        if (certcount < 2)
        {
            error("Server didn't send enough X509 certificates\n");
            return False;
        }
        for (; certcount > 2; certcount--)
        {       /* ignore all the certificates between the root and the signing CA */
            uint32 ignorelen;
            PCCERT_CONTEXT ignorecert;
 
            DEBUG_RDP5(("Ignored certs left: %d\n", certcount));
            in_uint32_le(s, ignorelen);
            DEBUG_RDP5(("Ignored Certificate length is %d\n", ignorelen));
            ignorecert = rdssl_cert_read(s->p, ignorelen);
            in_uint8s(s, ignorelen);
            if (ignorecert == NULL)
            {   /* XXX: error out? */
                DEBUG_RDP5(("got a bad cert: this will probably screw up the rest of the communication\n"));
            }
 
#ifdef WITH_DEBUG_RDP5
            DEBUG_RDP5(("cert #%d (ignored):\n", certcount));
            rdssl_cert_print_fp(stdout, ignorecert);
#endif
        }
        /* Do da funky X.509 stuffy
 
           "How did I find out about this?  I looked up and saw a
           bright light and when I came to I had a scar on my forehead
           and knew about X.500"
           - Peter Gutman in a early version of 
           http://www.cs.auckland.ac.nz/~pgut001/pubs/x509guide.txt
         */
        in_uint32_le(s, cacert_len);
        DEBUG_RDP5(("CA Certificate length is %d\n", cacert_len));
        cacert = rdssl_cert_read(s->p, cacert_len);
        in_uint8s(s, cacert_len);
        if (NULL == cacert)
        {
            error("Couldn't load CA Certificate from server\n");
            return False;
        }
        in_uint32_le(s, cert_len);
        DEBUG_RDP5(("Certificate length is %d\n", cert_len));
        server_cert = rdssl_cert_read(s->p, cert_len);
        in_uint8s(s, cert_len);
        if (NULL == server_cert)
        {
            rdssl_cert_free(cacert);
            error("Couldn't load Certificate from server\n");
            return False;
        }
        if (!rdssl_certs_ok(server_cert, cacert))
        {
            rdssl_cert_free(server_cert);
            rdssl_cert_free(cacert);
            error("Security error CA Certificate invalid\n");
            return False;
        }
        rdssl_cert_free(cacert);
        in_uint8s(s, 16);   /* Padding */
        server_public_key = rdssl_cert_to_rkey(server_cert, &g_server_public_key_len);
        if (NULL == server_public_key)
        {
            DEBUG_RDP5(("Didn't parse X509 correctly\n"));
            rdssl_cert_free(server_cert);
            return False;
        }
        rdssl_cert_free(server_cert);
        if ((g_server_public_key_len < SEC_MODULUS_SIZE) ||
            (g_server_public_key_len > SEC_MAX_MODULUS_SIZE))
        {
            error("Bad server public key size (%u bits)\n",
                  g_server_public_key_len * 8);
            rdssl_rkey_free(server_public_key);
            return False;
        }
        if (rdssl_rkey_get_exp_mod(server_public_key, exponent, SEC_EXPONENT_SIZE,
                       modulus, SEC_MAX_MODULUS_SIZE) != 0)
        {
            error("Problem extracting RSA exponent, modulus");
            rdssl_rkey_free(server_public_key);
            return False;
        }
        rdssl_rkey_free(server_public_key);
        return True;    /* There's some garbage here we don't care about */
    }
    return s_check_end(s);
}

Referenced by sec_process_crypt_info().

sec_parse_public_key()

static RD_BOOL sec_parse_public_key ( STREAM  s, uint8 *  modulus, uint8 *  exponent  )

static

Definition at line 599 of file secure.c.

{
    uint32 magic, modulus_len;
 
    in_uint32_le(s, magic);
    if (magic != SEC_RSA_MAGIC)
    {
        error("RSA magic 0x%x\n", magic);
        return False;
    }
 
    in_uint32_le(s, modulus_len);
    modulus_len -= SEC_PADDING_SIZE;
    if ((modulus_len < SEC_MODULUS_SIZE) || (modulus_len > SEC_MAX_MODULUS_SIZE))
    {
        error("Bad server public key size (%u bits)\n", modulus_len * 8);
        return False;
    }
 
    in_uint8s(s, 8);    /* modulus_bits, unknown */
    in_uint8a(s, exponent, SEC_EXPONENT_SIZE);
    in_uint8a(s, modulus, modulus_len);
    in_uint8s(s, SEC_PADDING_SIZE);
    g_server_public_key_len = modulus_len;
 
    return s_check(s);
}

Referenced by sec_parse_crypt_info().

sec_parse_public_sig()

static RD_BOOL sec_parse_public_sig ( STREAM  s, uint32  len, uint8 *  modulus, uint8 *  exponent  )

static

Definition at line 629 of file secure.c.

{
    uint8 signature[SEC_MAX_MODULUS_SIZE];
    uint8 signature_[SEC_MAX_MODULUS_SIZE];
    uint32 sig_len;
 
    if (len != 72)
    {
        return True;
    }
    memset(signature, 0, sizeof(signature));
    sig_len = len - 8;
    in_uint8a(s, signature, sig_len);
    if(rdssl_sign_ok((char *)exponent, SEC_EXPONENT_SIZE, (char *)modulus, g_server_public_key_len,
                     (char *)signature_, SEC_MODULUS_SIZE, (char *)signature, sig_len, (char *)g_testkey))
    {
        DEBUG_RDP5(("key signature doesn't match test key\n"));
    }
    return s_check(s);
}

Referenced by sec_parse_crypt_info().

sec_process_crypt_info()

static void sec_process_crypt_info ( STREAM  s )

static

Definition at line 818 of file secure.c.

{
    uint8 *server_random = NULL;
    uint8 modulus[SEC_MAX_MODULUS_SIZE];
    uint8 exponent[SEC_EXPONENT_SIZE];
    uint32 rc4_key_size;
 
    memset(modulus, 0, sizeof(modulus));
    memset(exponent, 0, sizeof(exponent));
    if (!sec_parse_crypt_info(s, &rc4_key_size, &server_random, modulus, exponent))
    {
        DEBUG(("Failed to parse crypt info\n"));
        return;
    }
    DEBUG(("Generating client random\n"));
    generate_random(g_client_random);
    sec_rsa_encrypt(g_sec_crypted_random, g_client_random, SEC_RANDOM_SIZE,
            g_server_public_key_len, modulus, exponent);
    sec_generate_keys(g_client_random, server_random, rc4_key_size);
}

Referenced by sec_process_mcs_data().

sec_process_mcs_data()

void sec_process_mcs_data

(

STREAM

s

)

Definition at line 856 of file secure.c.

{
    uint16 tag, length;
    uint8 *next_tag;
    uint8 len;
 
    in_uint8s(s, 21);   /* header (T.124 ConferenceCreateResponse) */
    in_uint8(s, len);
    if (len & 0x80)
        in_uint8(s, len);
 
    while (s->p < s->end)
    {
        in_uint16_le(s, tag);
        in_uint16_le(s, length);
 
        if (length <= 4)
            return;
 
        next_tag = s->p + length - 4;
 
        switch (tag)
        {
            case SEC_TAG_SRV_INFO:
                sec_process_srv_info(s);
                break;
 
            case SEC_TAG_SRV_CRYPT:
                sec_process_crypt_info(s);
                break;
 
            case SEC_TAG_SRV_CHANNELS:
                /* FIXME: We should parse this information and
                   use it to map RDP5 channels to MCS 
                   channels */
                break;
 
            default:
                unimpl("response tag 0x%x\n", tag);
        }
 
        s->p = next_tag;
    }
}

Referenced by mcs_recv_connect_response().

sec_process_srv_info()

static void sec_process_srv_info ( STREAM  s )

static

Definition at line 842 of file secure.c.

{
    in_uint16_le(s, g_server_rdp_version);
    DEBUG_RDP5(("Server RDP version is %d\n", g_server_rdp_version));
    if (1 == g_server_rdp_version)
    {
        g_rdp_version = RDP_V4;
        g_server_depth = 8;
    }
}

Referenced by sec_process_mcs_data().

sec_recv()

STREAM sec_recv

(

uint8 *

rdpver

)

Definition at line 903 of file secure.c.

{
    uint16 sec_flags;
    /* uint16 sec_flags_hi; */
    uint16 channel;
    STREAM s;
 
    while ((s = mcs_recv(&channel, rdpver)) != NULL)
    {
        if (rdpver != NULL)
        {
            if (*rdpver != 3)
            {
                if (*rdpver & 0x80)
                {
                    in_uint8s(s, 8);    /* signature */
                    sec_decrypt(s->p, s->end - s->p);
                }
                return s;
            }
        }
        if (g_encryption || (!g_licence_issued && !g_licence_error_result))
        {
            /* TS_SECURITY_HEADER */
            in_uint16_le(s, sec_flags);
            in_uint8s(s, 2); /* sec_flags_hi */
 
            if (g_encryption)
            {
                if (sec_flags & SEC_ENCRYPT)
                {
                    in_uint8s(s, 8);    /* signature */
                    sec_decrypt(s->p, s->end - s->p);
                }
 
                if (sec_flags & SEC_LICENSE_PKT)
                {
                    licence_process(s);
                    continue;
                }
 
                if (sec_flags & SEC_REDIRECTION_PKT)    /* SEC_REDIRECT_ENCRYPT */
                {
                    uint8 swapbyte;
 
                    in_uint8s(s, 8);    /* signature */
                    sec_decrypt(s->p, s->end - s->p);
 
                    /* Check for a redirect packet, starts with 00 04 */
                    if (s->p[0] == 0 && s->p[1] == 4)
                    {
                        /* for some reason the PDU and the length seem to be swapped.
                           This isn't good, but we're going to do a byte for byte
                           swap.  So the first four values appear as: 00 04 XX YY,
                           where XX YY is the little endian length. We're going to
                           use 04 00 as the PDU type, so after our swap this will look
                           like: XX YY 04 00 */
                        swapbyte = s->p[0];
                        s->p[0] = s->p[2];
                        s->p[2] = swapbyte;
 
                        swapbyte = s->p[1];
                        s->p[1] = s->p[3];
                        s->p[3] = swapbyte;
 
                        swapbyte = s->p[2];
                        s->p[2] = s->p[3];
                        s->p[3] = swapbyte;
                    }
#ifdef WITH_DEBUG
                    /* warning!  this debug statement will show passwords in the clear! */
                    hexdump(s->p, s->end - s->p);
#endif
                }
            }
            else
            {
                if (sec_flags & SEC_LICENSE_PKT)
                {
                    licence_process(s);
                    continue;
                }
                s->p -= 4;
            }
        }
 
        if (channel != MCS_GLOBAL_CHANNEL)
        {
            channel_process(s, channel);
            if (rdpver != NULL)
                *rdpver = 0xff;
            return s;
        }
 
        return s;
    }
 
    return NULL;
}

Referenced by rdp_recv().

sec_reset_state()

void sec_reset_state

(

void

)

Definition at line 1039 of file secure.c.

{
    g_server_rdp_version = 0;
    g_sec_encrypt_use_count = 0;
    g_sec_decrypt_use_count = 0;
    g_licence_issued = 0;
    g_licence_error_result = 0;
    mcs_reset_state();
}

Referenced by rdp_reset_state().

sec_rsa_encrypt()

static void sec_rsa_encrypt ( uint8 *  out, uint8 *  in, int  len, uint32  modulus_size, uint8 *  modulus, uint8 *  exponent  )

static

Definition at line 411 of file secure.c.

{
    rdssl_mod_exp((char *)out, 64, (char *)in, 32, (char *)modulus, 64, (char *)exponent, 4);
}

Referenced by sec_process_crypt_info().

sec_send()

void sec_send	(	STREAM	s,
		uint32	flags
	)

Definition at line 472 of file secure.c.

{
    sec_send_to_channel(s, flags, MCS_GLOBAL_CHANNEL);
}

Referenced by licence_info(), licence_present(), licence_send_authresp(), licence_send_new_licence_request(), licence_send_platform_challenge_response(), licence_send_request(), rdp_send_confirm_active(), rdp_send_data(), rdp_send_logon_info(), and sec_establish_key().

sec_send_to_channel()

void sec_send_to_channel	(	STREAM	s,
		uint32	flags,
		uint16	channel
	)

Definition at line 436 of file secure.c.

{
    int datalen;
 
#ifdef WITH_SCARD
    scard_lock(SCARD_LOCK_SEC);
#endif
 
    s_pop_layer(s, sec_hdr);
    if ((!g_licence_issued && !g_licence_error_result) || (flags & SEC_ENCRYPT))
        out_uint32_le(s, flags);
 
    if (flags & SEC_ENCRYPT)
    {
        flags &= ~SEC_ENCRYPT;
        datalen = s->end - s->p - 8;
 
#ifdef WITH_DEBUG
        DEBUG(("Sending encrypted packet:\n"));
        hexdump(s->p + 8, datalen);
#endif
 
        sec_sign(s->p, 8, g_sec_sign_key, g_rc4_key_len, s->p + 8, datalen);
        sec_encrypt(s->p + 8, datalen);
    }
 
    mcs_send_to_channel(s, channel);
 
#ifdef WITH_SCARD
    scard_unlock(SCARD_LOCK_SEC);
#endif
}

Referenced by channel_send(), and sec_send().

sec_sign()

void sec_sign	(	uint8 *	signature,
		int	siglen,
		uint8 *	session_key,
		int	keylen,
		uint8 *	data,
		int	datalen
	)

Definition at line 314 of file secure.c.

{
    uint8 shasig[20];
    uint8 md5sig[16];
    uint8 lenhdr[4];
    void * sha;
    void * md5;
 
    buf_out_uint32(lenhdr, datalen);
 
    sha = rdssl_sha1_info_create();
    rdssl_sha1_clear(sha);
    rdssl_sha1_transform(sha, (char *)session_key, keylen);
    rdssl_sha1_transform(sha, (char *)pad_54, 40);
    rdssl_sha1_transform(sha, (char *)lenhdr, 4);
    rdssl_sha1_transform(sha, (char *)data, datalen);
    rdssl_sha1_complete(sha, (char *)shasig);
    rdssl_sha1_info_delete(sha);
 
    md5 = rdssl_md5_info_create();
    rdssl_md5_clear(md5);
    rdssl_md5_transform(md5, (char *)session_key, keylen);
    rdssl_md5_transform(md5, (char *)pad_92, 48);
    rdssl_md5_transform(md5, (char *)shasig, 20);
    rdssl_md5_complete(md5, (char *)md5sig);
    rdssl_md5_info_delete(md5); 
 
    memcpy(signature, md5sig, siglen);
}

Referenced by sec_send_to_channel().

sec_update()

static void sec_update ( uint8 *  key, uint8 *  update_key  )

static

Definition at line 346 of file secure.c.

{
    uint8 shasig[20];
    void * sha;
    void * md5;
    void * update;
 
    sha = rdssl_sha1_info_create();
    rdssl_sha1_clear(sha);
    rdssl_sha1_transform(sha, (char *)update_key, g_rc4_key_len);
    rdssl_sha1_transform(sha, (char *)pad_54, 40);
    rdssl_sha1_transform(sha, (char *)key, g_rc4_key_len);
    rdssl_sha1_complete(sha, (char *)shasig);
    rdssl_sha1_info_delete(sha);
 
    md5 = rdssl_md5_info_create();
    rdssl_md5_clear(md5);
    rdssl_md5_transform(md5, (char *)update_key, g_rc4_key_len);
    rdssl_md5_transform(md5, (char *)pad_92, 48);
    rdssl_md5_transform(md5, (char *)shasig, 20);
    rdssl_md5_complete(md5, (char *)key);
    rdssl_md5_info_delete(md5);
 
 
    update = rdssl_rc4_info_create();
    rdssl_rc4_set_key(update, (char *)key, g_rc4_key_len);
    rdssl_rc4_crypt(update, (char *)key, (char *)key, g_rc4_key_len);
    rdssl_rc4_info_delete(update);
 
    if (g_rc4_key_len == 8)
        sec_make_40bit(key);
}

Referenced by sec_decrypt(), and sec_encrypt().

Variable Documentation

g_channels

VCHANNEL g_channels[]

extern

Definition at line 32 of file channels.c.

Referenced by channel_process(), channel_register(), and sec_out_mcs_data().

g_client_random

uint8 g_client_random[SEC_RANDOM_SIZE]

extern

Definition at line 78 of file uimain.c.

Referenced by sec_process_crypt_info().

g_console_session

RD_BOOL g_console_session

extern

Definition at line 48 of file uimain.c.

Referenced by parse_parameters(), and sec_out_mcs_data().

g_encryption

RD_BOOL g_encryption

extern

Definition at line 40 of file uimain.c.

Referenced by sec_connect(), sec_out_mcs_data(), and sec_recv().

g_height

int g_height

extern

Definition at line 43 of file uimain.c.

Referenced by sec_out_mcs_data().

g_hostname

char g_hostname[16]

extern

Definition at line 26 of file uimain.c.

Referenced by sec_out_mcs_data().

g_keyboard_functionkeys

int g_keyboard_functionkeys

extern

Definition at line 47 of file uimain.c.

Referenced by sec_out_mcs_data().

g_keyboard_subtype

int g_keyboard_subtype

extern

Definition at line 46 of file uimain.c.

Referenced by sec_out_mcs_data().

g_keyboard_type

int g_keyboard_type

extern

Definition at line 45 of file uimain.c.

Referenced by sec_out_mcs_data().

g_keylayout

unsigned int g_keylayout

extern

Definition at line 44 of file uimain.c.

Referenced by sec_out_mcs_data().

g_licence_error_result

RD_BOOL g_licence_error_result

extern

Definition at line 45 of file licence.c.

Referenced by licence_process_error_alert(), sec_init(), sec_recv(), sec_reset_state(), and sec_send_to_channel().

g_licence_issued

RD_BOOL g_licence_issued

extern

Definition at line 44 of file licence.c.

Referenced by licence_process_error_alert(), licence_process_new_license(), sec_init(), sec_recv(), sec_reset_state(), and sec_send_to_channel().

g_num_channels

unsigned int g_num_channels

extern

Definition at line 33 of file channels.c.

Referenced by channel_process(), channel_register(), and sec_out_mcs_data().

g_rc4_decrypt_key

void* g_rc4_decrypt_key

static

Definition at line 94 of file secure.c.

Referenced by sec_decrypt(), and sec_generate_keys().

g_rc4_encrypt_key

void* g_rc4_encrypt_key

static

Definition at line 95 of file secure.c.

Referenced by sec_encrypt(), and sec_generate_keys().

g_rc4_key_len

int g_rc4_key_len

static

Definition at line 93 of file secure.c.

Referenced by sec_decrypt(), sec_encrypt(), sec_generate_keys(), sec_send_to_channel(), and sec_update().

g_rdp_version

RDP_VERSION g_rdp_version

extern

Definition at line 74 of file uimain.c.

Referenced by sec_out_mcs_data(), and sec_process_srv_info().

g_redirect_session_id

uint32 g_redirect_session_id

extern

Definition at line 67 of file uimain.c.

Referenced by sec_out_mcs_data().

g_sec_crypted_random

uint8 g_sec_crypted_random[SEC_MAX_MODULUS_SIZE]

static

Definition at line 103 of file secure.c.

Referenced by sec_establish_key(), and sec_process_crypt_info().

g_sec_decrypt_key

uint8 g_sec_decrypt_key[16]

static

Definition at line 99 of file secure.c.

Referenced by sec_decrypt(), and sec_generate_keys().

g_sec_decrypt_update_key

uint8 g_sec_decrypt_update_key[16]

static

Definition at line 101 of file secure.c.

Referenced by sec_decrypt(), and sec_generate_keys().

g_sec_decrypt_use_count

int g_sec_decrypt_use_count = 0

static

Definition at line 109 of file secure.c.

Referenced by sec_decrypt(), and sec_reset_state().

g_sec_encrypt_key

uint8 g_sec_encrypt_key[16]

static

Definition at line 100 of file secure.c.

Referenced by sec_encrypt(), and sec_generate_keys().

g_sec_encrypt_update_key

uint8 g_sec_encrypt_update_key[16]

static

Definition at line 102 of file secure.c.

Referenced by sec_encrypt(), and sec_generate_keys().

g_sec_encrypt_use_count

int g_sec_encrypt_use_count = 0

static

Definition at line 108 of file secure.c.

Referenced by sec_encrypt(), and sec_reset_state().

g_sec_sign_key

uint8 g_sec_sign_key[16]

static

Definition at line 98 of file secure.c.

Referenced by sec_generate_keys(), and sec_send_to_channel().

g_server_depth

int g_server_depth

extern

Definition at line 41 of file uimain.c.

Referenced by sec_out_mcs_data(), and sec_process_srv_info().

g_server_public_key_len

uint32 g_server_public_key_len

static

Definition at line 96 of file secure.c.

Referenced by sec_establish_key(), sec_parse_crypt_info(), sec_parse_public_key(), sec_parse_public_sig(), and sec_process_crypt_info().

g_server_rdp_version

uint16 g_server_rdp_version = 0

Definition at line 105 of file secure.c.

Referenced by rdp_send_logon_info(), sec_process_srv_info(), and sec_reset_state().

g_testkey

uint8 g_testkey[176]

static

Initial value:

=
{
    0x01, 0x00, 0x00, 0x00, 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, 0x79, 0x6f, 0xb4, 0xdf,
    0xa6, 0x95, 0xb9, 0xa9, 0x61, 0xe3, 0xc4, 0x5e,
    0xff, 0x6b, 0xd8, 0x81, 0x8a, 0x12, 0x4a, 0x93,
    0x42, 0x97, 0x18, 0x93, 0xac, 0xd1, 0x3a, 0x38,
    0x3c, 0x68, 0x50, 0x19, 0x31, 0xb6, 0x84, 0x51,
    0x79, 0xfb, 0x1c, 0xe7, 0xe3, 0x99, 0x20, 0xc7,
    0x84, 0xdf, 0xd1, 0xaa, 0xb5, 0x15, 0xef, 0x47,
    0x7e, 0xfc, 0x88, 0xeb, 0x29, 0xc3, 0x27, 0x5a,
    0x35, 0xf8, 0xfd, 0xaa, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00,
                            0x08, 0x00, 0x48, 0x00,
    0x32, 0x3b, 0xde, 0x6f, 0x18, 0x97, 0x1e, 0xc3,
    0x6b, 0x2b, 0x2d, 0xe4, 0xfc, 0x2d, 0xa2, 0x8e,
    0x32, 0x3c, 0xf3, 0x1b, 0x24, 0x90, 0x57, 0x4d,
    0x8e, 0xe4, 0x69, 0xfc, 0x16, 0x8d, 0x41, 0x92,
    0x78, 0xc7, 0x9c, 0xb4, 0x26, 0xff, 0xe8, 0x3e,
    0xa1, 0x8a, 0xf5, 0x57, 0xc0, 0x7f, 0x3e, 0x21,
    0x17, 0x32, 0x30, 0x6f, 0x79, 0xe1, 0x36, 0xcd,
    0xb6, 0x8e, 0xbe, 0x57, 0x57, 0xd2, 0xa9, 0x36
}

Definition at line 113 of file secure.c.

Referenced by sec_parse_public_sig().

g_width

int g_width

extern

Definition at line 42 of file uimain.c.

Referenced by sec_out_mcs_data().

pad_54

uint8 pad_54[40]

static

Initial value:

= {
    54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,
    54, 54, 54,
    54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,
    54, 54, 54
}

Definition at line 288 of file secure.c.

Referenced by sec_sign(), and sec_update().

pad_92

uint8 pad_92[48]

static

Initial value:

= {
    92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92,
    92, 92, 92, 92, 92, 92, 92,
    92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92,
    92, 92, 92, 92, 92, 92, 92
}

Definition at line 295 of file secure.c.

Referenced by sec_sign(), and sec_update().