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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2010 Antoine Martin. All Rights Reserved.
* Copyright (C) 2010 D. R. Commander. All Rights Reserved.
*
* This 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 software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <os/os.h>
#include <rfb/Password.h>
#include <rfb/util.h>
#include <termios.h>
using namespace rfb;
char* prog;
static void usage()
{
fprintf(stderr,"usage: %s [file]\n", prog);
fprintf(stderr," %s -f\n", prog);
exit(1);
}
static void enableEcho(bool enable) {
termios attrs;
tcgetattr(fileno(stdin), &attrs);
if (enable)
attrs.c_lflag |= ECHO;
else
attrs.c_lflag &= ~ECHO;
attrs.c_lflag |= ECHONL;
tcsetattr(fileno(stdin), TCSAFLUSH, &attrs);
}
static char* getpassword(const char* prompt) {
PlainPasswd buf(256);
if (prompt) fputs(prompt, stdout);
enableEcho(false);
char* result = fgets(buf.buf, 256, stdin);
enableEcho(true);
if (result) {
if (result[strlen(result)-1] == '\n')
result[strlen(result)-1] = 0;
return buf.takeBuf();
}
return 0;
}
// Reads passwords from stdin and prints encrypted passwords to stdout.
static int encrypt_pipe() {
int i;
// We support a maximum of two passwords right now
for (i = 0;i < 2;i++) {
char *result = getpassword(NULL);
if (!result)
break;
ObfuscatedPasswd obfuscated(result);
if (fwrite(obfuscated.buf, obfuscated.length, 1, stdout) != 1) {
fprintf(stderr,"Writing to stdout failed\n");
return 1;
}
}
// Did we fail to produce even one password?
if (i == 0)
return 1;
return 0;
}
static ObfuscatedPasswd* readpassword() {
while (true) {
PlainPasswd passwd(getpassword("Password:"));
if (!passwd.buf) {
perror("getpassword error");
exit(1);
}
if (strlen(passwd.buf) < 6) {
if (strlen(passwd.buf) == 0) {
fprintf(stderr,"Password not changed\n");
exit(1);
}
fprintf(stderr,"Password must be at least 6 characters - try again\n");
continue;
}
PlainPasswd passwd2(getpassword("Verify:"));
if (!passwd2.buf) {
perror("getpass error");
exit(1);
}
if (strcmp(passwd.buf, passwd2.buf) != 0) {
fprintf(stderr,"Passwords don't match - try again\n");
continue;
}
return new ObfuscatedPasswd(passwd);
}
}
int main(int argc, char** argv)
{
prog = argv[0];
char* fname = 0;
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-q") == 0) { // allowed for backwards compatibility
} else if (strncmp(argv[i], "-f", 2) == 0) {
return encrypt_pipe();
} else if (argv[i][0] == '-') {
usage();
} else if (!fname) {
fname = strDup(argv[i]);
} else {
usage();
}
}
if (!fname) {
char *homeDir = NULL;
if (getvnchomedir(&homeDir) == -1) {
fprintf(stderr, "Can't obtain VNC home directory\n");
exit(1);
}
mkdir(homeDir, 0777);
fname = new char[strlen(homeDir) + 7];
sprintf(fname, "%spasswd", homeDir);
delete [] homeDir;
}
while (true) {
ObfuscatedPasswd* obfuscated = readpassword();
ObfuscatedPasswd* obfuscatedReadOnly = 0;
fprintf(stderr, "Would you like to enter a view-only password (y/n)? ");
char yesno[3];
if (fgets(yesno, 3, stdin) != NULL && (yesno[0] == 'y' || yesno[0] == 'Y')) {
obfuscatedReadOnly = readpassword();
}
FILE* fp = fopen(fname,"w");
if (!fp) {
fprintf(stderr,"Couldn't open %s for writing\n",fname);
delete [] fname;
delete obfuscated;
delete obfuscatedReadOnly;
exit(1);
}
chmod(fname, S_IRUSR|S_IWUSR);
if (fwrite(obfuscated->buf, obfuscated->length, 1, fp) != 1) {
fprintf(stderr,"Writing to %s failed\n",fname);
delete [] fname;
delete obfuscated;
delete obfuscatedReadOnly;
exit(1);
}
delete obfuscated;
if (obfuscatedReadOnly) {
if (fwrite(obfuscatedReadOnly->buf, obfuscatedReadOnly->length, 1, fp) != 1) {
fprintf(stderr,"Writing to %s failed\n",fname);
delete [] fname;
delete obfuscatedReadOnly;
exit(1);
}
}
fclose(fp);
delete [] fname;
delete obfuscatedReadOnly;
return 0;
}
}
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