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xrdp-proprietary/xrdp/os_calls.c

362 lines
8.8 KiB

/*
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Copyright (C) Jay Sorg 2004
generic operating system calls
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <openssl/rc4.h>
#include <openssl/md5.h>
#include <openssl/sha.h>
#include <openssl/bn.h>
static pthread_mutex_t g_term_mutex = PTHREAD_MUTEX_INITIALIZER;
static int g_term = 0;
/*****************************************************************************/
void g_printf(char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stdout, format, ap);
va_end(ap);
}
/*****************************************************************************/
/* produce a hex dump */
void g_hexdump(char* p, int len)
{
unsigned char* line;
int i;
int thisline;
int offset;
line = (unsigned char*)p;
offset = 0;
while (offset < len)
{
printf("%04x ", offset);
thisline = len - offset;
if (thisline > 16)
thisline = 16;
for (i = 0; i < thisline; i++)
printf("%02x ", line[i]);
for (; i < 16; i++)
printf(" ");
for (i = 0; i < thisline; i++)
printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
printf("\n");
offset += thisline;
line += thisline;
}
}
/*****************************************************************************/
void* g_malloc(int size, int zero)
{
void* rv;
rv = malloc(size);
if (zero)
memset(rv, 0, size);
return rv;
}
/*****************************************************************************/
void g_free(void* ptr)
{
if (ptr != 0)
free(ptr);
}
/*****************************************************************************/
void g_memset(void* ptr, int val, int size)
{
memset(ptr, val, size);
}
/*****************************************************************************/
void g_memcpy(void* d_ptr, const void* s_ptr, int size)
{
memcpy(d_ptr, s_ptr, size);
}
/*****************************************************************************/
int g_getchar(void)
{
return getchar();
}
/*****************************************************************************/
int g_tcp_socket(void)
{
return socket(PF_INET, SOCK_STREAM, 0);
}
/*****************************************************************************/
void g_tcp_close(int sck)
{
close(sck);
}
/*****************************************************************************/
int g_tcp_set_non_blocking(int sck)
{
int i;
i = fcntl(sck, F_GETFL);
i = i | O_NONBLOCK;
fcntl(sck, F_SETFL, i);
return 0;
}
/*****************************************************************************/
int g_tcp_bind(int sck, char* port)
{
struct sockaddr_in s;
memset(&s, 0, sizeof(struct sockaddr_in));
s.sin_family = AF_INET;
s.sin_port = htons(atoi(port));
s.sin_addr.s_addr = INADDR_ANY;
return bind(sck, (struct sockaddr*)&s, sizeof(struct sockaddr_in));
}
/*****************************************************************************/
int g_tcp_listen(int sck)
{
return listen(sck, 2);
}
/*****************************************************************************/
int g_tcp_accept(int sck)
{
struct sockaddr_in s;
int i;
i = sizeof(struct sockaddr_in);
memset(&s, 0, i);
return accept(sck, (struct sockaddr*)&s, (socklen_t*)&i);
}
/*****************************************************************************/
int g_tcp_recv(int sck, void* ptr, int len, int flags)
{
return recv(sck, ptr, len, flags);
}
/*****************************************************************************/
int g_tcp_send(int sck, void* ptr, int len, int flags)
{
return send(sck, ptr, len, flags);
}
/*****************************************************************************/
int g_tcp_last_error_would_block(int sck)
{
return errno == EWOULDBLOCK;
}
/*****************************************************************************/
int g_tcp_select(int sck)
{
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(sck, &rfds);
return select(sck + 1, &rfds, 0, 0, 0);
}
/*****************************************************************************/
int g_is_term(void)
{
int rv;
pthread_mutex_lock(&g_term_mutex);
rv = g_term;
pthread_mutex_unlock(&g_term_mutex);
return rv;
}
/*****************************************************************************/
void g_set_term(int in_val)
{
pthread_mutex_lock(&g_term_mutex);
g_term = in_val;
pthread_mutex_unlock(&g_term_mutex);
}
/*****************************************************************************/
void g_sleep(int msecs)
{
usleep(msecs * 1000);
}
/*****************************************************************************/
int g_thread_create(void* (*start_routine)(void*), void* arg)
{
pthread_t thread;
return pthread_create(&thread, 0, start_routine, arg);
}
/* rc4 stuff */
/*****************************************************************************/
void* g_rc4_info_create(void)
{
return g_malloc(sizeof(RC4_KEY), 1);;
}
/*****************************************************************************/
void g_rc4_info_delete(void* rc4_info)
{
g_free(rc4_info);
}
/*****************************************************************************/
void g_rc4_set_key(void* rc4_info, char* key, int len)
{
RC4_set_key((RC4_KEY*)rc4_info, len, (unsigned char*)key);
}
/*****************************************************************************/
void g_rc4_crypt(void* rc4_info, char* data, int len)
{
RC4((RC4_KEY*)rc4_info, len, (unsigned char*)data, (unsigned char*)data);
}
/* sha1 stuff */
/*****************************************************************************/
void* g_sha1_info_create(void)
{
return g_malloc(sizeof(SHA_CTX), 1);
}
/*****************************************************************************/
void g_sha1_info_delete(void* sha1_info)
{
g_free(sha1_info);
}
/*****************************************************************************/
void g_sha1_clear(void* sha1_info)
{
SHA1_Init((SHA_CTX*)sha1_info);
}
/*****************************************************************************/
void g_sha1_transform(void* sha1_info, char* data, int len)
{
SHA1_Update((SHA_CTX*)sha1_info, data, len);
}
/*****************************************************************************/
void g_sha1_complete(void* sha1_info, char* data)
{
SHA1_Final((unsigned char*)data, (SHA_CTX*)sha1_info);
}
/* md5 stuff */
/*****************************************************************************/
void* g_md5_info_create(void)
{
return g_malloc(sizeof(MD5_CTX), 1);
}
/*****************************************************************************/
void g_md5_info_delete(void* md5_info)
{
g_free(md5_info);
}
/*****************************************************************************/
void g_md5_clear(void* md5_info)
{
MD5_Init((MD5_CTX*)md5_info);
}
/*****************************************************************************/
void g_md5_transform(void* md5_info, char* data, int len)
{
MD5_Update((MD5_CTX*)md5_info, data, len);
}
/*****************************************************************************/
void g_md5_complete(void* md5_info, char* data)
{
MD5_Final((unsigned char*)data, (MD5_CTX*)md5_info);
}
/*****************************************************************************/
int g_mod_exp(char* out, char* in, char* mod, char* exp)
{
BN_CTX* ctx;
BIGNUM lmod;
BIGNUM lexp;
BIGNUM lin;
BIGNUM lout;
int rv;
ctx = BN_CTX_new();
BN_init(&lmod);
BN_init(&lexp);
BN_init(&lin);
BN_init(&lout);
BN_bin2bn((unsigned char*)mod, 64, &lmod);
BN_bin2bn((unsigned char*)exp, 64, &lexp);
BN_bin2bn((unsigned char*)in, 64, &lin);
BN_mod_exp(&lout, &lin, &lexp, &lmod, ctx);
rv = BN_bn2bin(&lout, (unsigned char*)out);
BN_free(&lin);
BN_free(&lout);
BN_free(&lexp);
BN_free(&lmod);
BN_CTX_free(ctx);
return rv;
}
/*****************************************************************************/
void g_random(char* data, int len)
{
int fd;
memset(data, 0x44, len);
fd = open("/dev/urandom", O_RDONLY);
if (fd == -1)
fd = open("/dev/random", O_RDONLY);
if (fd != -1)
{
read(fd, data, len);
close(fd);
}
}